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-rw-r--r--fs/btrfs/ctree.h1
-rw-r--r--fs/btrfs/disk-io.c3
-rw-r--r--fs/btrfs/extent_io.c6
-rw-r--r--fs/btrfs/file.c37
-rw-r--r--fs/btrfs/ioctl.c2
-rw-r--r--fs/btrfs/qgroup.c21
-rw-r--r--fs/btrfs/qgroup.h3
-rw-r--r--fs/cifs/cifs_fs_sb.h4
-rw-r--r--fs/cifs/cifsencrypt.c16
-rw-r--r--fs/cifs/cifsfs.c14
-rw-r--r--fs/cifs/connect.c49
-rw-r--r--fs/cifs/dir.c44
-rw-r--r--fs/cifs/inode.c22
-rw-r--r--fs/cifs/smb2ops.c30
-rw-r--r--fs/ecryptfs/file.c71
-rw-r--r--fs/ext4/inode.c40
-rw-r--r--fs/ext4/namei.c9
-rw-r--r--fs/ext4/super.c36
-rw-r--r--fs/ext4/xattr.c66
-rw-r--r--fs/jbd2/commit.c2
-rw-r--r--fs/namei.c4
-rw-r--r--fs/nfs/write.c5
-rw-r--r--fs/nfsd/nfs4state.c65
-rw-r--r--fs/overlayfs/copy_up.c2
-rw-r--r--fs/overlayfs/inode.c19
-rw-r--r--fs/overlayfs/overlayfs.h1
-rw-r--r--fs/overlayfs/super.c22
-rw-r--r--fs/proc/task_mmu.c66
-rw-r--r--fs/proc/task_nommu.c49
-rw-r--r--fs/seq_file.c4
-rw-r--r--fs/sysfs/file.c8
-rw-r--r--fs/ubifs/tnc_commit.c2
-rw-r--r--fs/xfs/libxfs/xfs_sb.c3
33 files changed, 496 insertions, 230 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 385b449fd7ed..1391f72c28c3 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1770,6 +1770,7 @@ struct btrfs_fs_info {
struct btrfs_workqueue *qgroup_rescan_workers;
struct completion qgroup_rescan_completion;
struct btrfs_work qgroup_rescan_work;
+ bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */
/* filesystem state */
unsigned long fs_state;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 41fb43183406..85b207d19aa5 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2276,6 +2276,7 @@ static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info)
fs_info->quota_enabled = 0;
fs_info->pending_quota_state = 0;
fs_info->qgroup_ulist = NULL;
+ fs_info->qgroup_rescan_running = false;
mutex_init(&fs_info->qgroup_rescan_lock);
}
@@ -3811,7 +3812,7 @@ void close_ctree(struct btrfs_root *root)
smp_mb();
/* wait for the qgroup rescan worker to stop */
- btrfs_qgroup_wait_for_completion(fs_info);
+ btrfs_qgroup_wait_for_completion(fs_info, false);
/* wait for the uuid_scan task to finish */
down(&fs_info->uuid_tree_rescan_sem);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 9abe18763a7f..257bbdcb5df6 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2786,12 +2786,6 @@ struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask)
btrfs_bio->csum = NULL;
btrfs_bio->csum_allocated = NULL;
btrfs_bio->end_io = NULL;
-
-#ifdef CONFIG_BLK_CGROUP
- /* FIXME, put this into bio_clone_bioset */
- if (bio->bi_css)
- bio_associate_blkcg(new, bio->bi_css);
-#endif
}
return new;
}
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 5e5db3687e34..353f4bae658c 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1526,27 +1526,24 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
reserve_bytes = num_pages << PAGE_CACHE_SHIFT;
- if (BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW |
- BTRFS_INODE_PREALLOC)) {
- ret = check_can_nocow(inode, pos, &write_bytes);
- if (ret < 0)
- break;
- if (ret > 0) {
- /*
- * For nodata cow case, no need to reserve
- * data space.
- */
- only_release_metadata = true;
- /*
- * our prealloc extent may be smaller than
- * write_bytes, so scale down.
- */
- num_pages = DIV_ROUND_UP(write_bytes + offset,
- PAGE_CACHE_SIZE);
- reserve_bytes = num_pages << PAGE_CACHE_SHIFT;
- goto reserve_metadata;
- }
+ if ((BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW |
+ BTRFS_INODE_PREALLOC)) &&
+ check_can_nocow(inode, pos, &write_bytes) > 0) {
+ /*
+ * For nodata cow case, no need to reserve
+ * data space.
+ */
+ only_release_metadata = true;
+ /*
+ * our prealloc extent may be smaller than
+ * write_bytes, so scale down.
+ */
+ num_pages = DIV_ROUND_UP(write_bytes + offset,
+ PAGE_CACHE_SIZE);
+ reserve_bytes = num_pages << PAGE_CACHE_SHIFT;
+ goto reserve_metadata;
}
+
ret = btrfs_check_data_free_space(inode, pos, write_bytes);
if (ret < 0)
break;
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index bfcd87ee8ff5..65f30b3b04f9 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -5121,7 +5121,7 @@ static long btrfs_ioctl_quota_rescan_wait(struct file *file, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- return btrfs_qgroup_wait_for_completion(root->fs_info);
+ return btrfs_qgroup_wait_for_completion(root->fs_info, true);
}
static long _btrfs_ioctl_set_received_subvol(struct file *file,
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 5279fdae7142..bcc965ed5fa1 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -995,7 +995,7 @@ int btrfs_quota_disable(struct btrfs_trans_handle *trans,
goto out;
fs_info->quota_enabled = 0;
fs_info->pending_quota_state = 0;
- btrfs_qgroup_wait_for_completion(fs_info);
+ btrfs_qgroup_wait_for_completion(fs_info, false);
spin_lock(&fs_info->qgroup_lock);
quota_root = fs_info->quota_root;
fs_info->quota_root = NULL;
@@ -2283,6 +2283,10 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
int err = -ENOMEM;
int ret = 0;
+ mutex_lock(&fs_info->qgroup_rescan_lock);
+ fs_info->qgroup_rescan_running = true;
+ mutex_unlock(&fs_info->qgroup_rescan_lock);
+
path = btrfs_alloc_path();
if (!path)
goto out;
@@ -2349,6 +2353,9 @@ out:
}
done:
+ mutex_lock(&fs_info->qgroup_rescan_lock);
+ fs_info->qgroup_rescan_running = false;
+ mutex_unlock(&fs_info->qgroup_rescan_lock);
complete_all(&fs_info->qgroup_rescan_completion);
}
@@ -2467,20 +2474,26 @@ btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info)
return 0;
}
-int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info)
+int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info,
+ bool interruptible)
{
int running;
int ret = 0;
mutex_lock(&fs_info->qgroup_rescan_lock);
spin_lock(&fs_info->qgroup_lock);
- running = fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN;
+ running = fs_info->qgroup_rescan_running;
spin_unlock(&fs_info->qgroup_lock);
mutex_unlock(&fs_info->qgroup_rescan_lock);
- if (running)
+ if (!running)
+ return 0;
+
+ if (interruptible)
ret = wait_for_completion_interruptible(
&fs_info->qgroup_rescan_completion);
+ else
+ wait_for_completion(&fs_info->qgroup_rescan_completion);
return ret;
}
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h
index ecb2c143ef75..3d73e4c9c7df 100644
--- a/fs/btrfs/qgroup.h
+++ b/fs/btrfs/qgroup.h
@@ -46,7 +46,8 @@ int btrfs_quota_disable(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info);
void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info);
-int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info);
+int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info,
+ bool interruptible);
int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 src, u64 dst);
int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans,
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 3182273a3407..1418daa03d95 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -46,6 +46,9 @@
#define CIFS_MOUNT_CIFS_BACKUPUID 0x200000 /* backup intent bit for a user */
#define CIFS_MOUNT_CIFS_BACKUPGID 0x400000 /* backup intent bit for a group */
#define CIFS_MOUNT_MAP_SFM_CHR 0x800000 /* SFM/MAC mapping for illegal chars */
+#define CIFS_MOUNT_USE_PREFIX_PATH 0x1000000 /* make subpath with unaccessible
+ * root mountable
+ */
struct cifs_sb_info {
struct rb_root tlink_tree;
@@ -67,5 +70,6 @@ struct cifs_sb_info {
struct backing_dev_info bdi;
struct delayed_work prune_tlinks;
struct rcu_head rcu;
+ char *prepath;
};
#endif /* _CIFS_FS_SB_H */
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index e682b36a210f..4acbc390a7d6 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -731,24 +731,26 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
memcpy(ses->auth_key.response + baselen, tiblob, tilen);
+ mutex_lock(&ses->server->srv_mutex);
+
rc = crypto_hmacmd5_alloc(ses->server);
if (rc) {
cifs_dbg(VFS, "could not crypto alloc hmacmd5 rc %d\n", rc);
- goto setup_ntlmv2_rsp_ret;
+ goto unlock;
}
/* calculate ntlmv2_hash */
rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
if (rc) {
cifs_dbg(VFS, "could not get v2 hash rc %d\n", rc);
- goto setup_ntlmv2_rsp_ret;
+ goto unlock;
}
/* calculate first part of the client response (CR1) */
rc = CalcNTLMv2_response(ses, ntlmv2_hash);
if (rc) {
cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
- goto setup_ntlmv2_rsp_ret;
+ goto unlock;
}
/* now calculate the session key for NTLMv2 */
@@ -757,13 +759,13 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
if (rc) {
cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
__func__);
- goto setup_ntlmv2_rsp_ret;
+ goto unlock;
}
rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
if (rc) {
cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
- goto setup_ntlmv2_rsp_ret;
+ goto unlock;
}
rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
@@ -771,7 +773,7 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
CIFS_HMAC_MD5_HASH_SIZE);
if (rc) {
cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
- goto setup_ntlmv2_rsp_ret;
+ goto unlock;
}
rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
@@ -779,6 +781,8 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
if (rc)
cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
+unlock:
+ mutex_unlock(&ses->server->srv_mutex);
setup_ntlmv2_rsp_ret:
kfree(tiblob);
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index cbc0f4bca0c0..450578097fb7 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -686,6 +686,14 @@ cifs_do_mount(struct file_system_type *fs_type,
goto out_cifs_sb;
}
+ if (volume_info->prepath) {
+ cifs_sb->prepath = kstrdup(volume_info->prepath, GFP_KERNEL);
+ if (cifs_sb->prepath == NULL) {
+ root = ERR_PTR(-ENOMEM);
+ goto out_cifs_sb;
+ }
+ }
+
cifs_setup_cifs_sb(volume_info, cifs_sb);
rc = cifs_mount(cifs_sb, volume_info);
@@ -724,7 +732,11 @@ cifs_do_mount(struct file_system_type *fs_type,
sb->s_flags |= MS_ACTIVE;
}
- root = cifs_get_root(volume_info, sb);
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
+ root = dget(sb->s_root);
+ else
+ root = cifs_get_root(volume_info, sb);
+
if (IS_ERR(root))
goto out_super;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 5481a6eb9a95..61c3a5ab8637 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3517,6 +3517,44 @@ cifs_get_volume_info(char *mount_data, const char *devname)
return volume_info;
}
+static int
+cifs_are_all_path_components_accessible(struct TCP_Server_Info *server,
+ unsigned int xid,
+ struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb,
+ char *full_path)
+{
+ int rc;
+ char *s;
+ char sep, tmp;
+
+ sep = CIFS_DIR_SEP(cifs_sb);
+ s = full_path;
+
+ rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, "");
+ while (rc == 0) {
+ /* skip separators */
+ while (*s == sep)
+ s++;
+ if (!*s)
+ break;
+ /* next separator */
+ while (*s && *s != sep)
+ s++;
+
+ /*
+ * temporarily null-terminate the path at the end of
+ * the current component
+ */
+ tmp = *s;
+ *s = 0;
+ rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
+ full_path);
+ *s = tmp;
+ }
+ return rc;
+}
+
int
cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
{
@@ -3654,6 +3692,16 @@ remote_path_check:
kfree(full_path);
goto mount_fail_check;
}
+
+ rc = cifs_are_all_path_components_accessible(server,
+ xid, tcon, cifs_sb,
+ full_path);
+ if (rc != 0) {
+ cifs_dbg(VFS, "cannot query dirs between root and final path, "
+ "enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
+ rc = 0;
+ }
kfree(full_path);
}
@@ -3923,6 +3971,7 @@ cifs_umount(struct cifs_sb_info *cifs_sb)
bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb->mountdata);
+ kfree(cifs_sb->prepath);
call_rcu(&cifs_sb->rcu, delayed_free);
}
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index c3eb998a99bd..26a3b389a265 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -84,6 +84,7 @@ build_path_from_dentry(struct dentry *direntry)
struct dentry *temp;
int namelen;
int dfsplen;
+ int pplen = 0;
char *full_path;
char dirsep;
struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
@@ -95,8 +96,12 @@ build_path_from_dentry(struct dentry *direntry)
dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
else
dfsplen = 0;
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
+ pplen = cifs_sb->prepath ? strlen(cifs_sb->prepath) + 1 : 0;
+
cifs_bp_rename_retry:
- namelen = dfsplen;
+ namelen = dfsplen + pplen;
seq = read_seqbegin(&rename_lock);
rcu_read_lock();
for (temp = direntry; !IS_ROOT(temp);) {
@@ -137,7 +142,7 @@ cifs_bp_rename_retry:
}
}
rcu_read_unlock();
- if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) {
+ if (namelen != dfsplen + pplen || read_seqretry(&rename_lock, seq)) {
cifs_dbg(FYI, "did not end path lookup where expected. namelen=%ddfsplen=%d\n",
namelen, dfsplen);
/* presumably this is only possible if racing with a rename
@@ -153,6 +158,17 @@ cifs_bp_rename_retry:
those safely to '/' if any are found in the middle of the prepath */
/* BB test paths to Windows with '/' in the midst of prepath */
+ if (pplen) {
+ int i;
+
+ cifs_dbg(FYI, "using cifs_sb prepath <%s>\n", cifs_sb->prepath);
+ memcpy(full_path+dfsplen+1, cifs_sb->prepath, pplen-1);
+ full_path[dfsplen] = '\\';
+ for (i = 0; i < pplen-1; i++)
+ if (full_path[dfsplen+1+i] == '/')
+ full_path[dfsplen+1+i] = CIFS_DIR_SEP(cifs_sb);
+ }
+
if (dfsplen) {
strncpy(full_path, tcon->treeName, dfsplen);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
@@ -229,6 +245,13 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
goto cifs_create_get_file_info;
}
+ if (S_ISDIR(newinode->i_mode)) {
+ CIFSSMBClose(xid, tcon, fid->netfid);
+ iput(newinode);
+ rc = -EISDIR;
+ goto out;
+ }
+
if (!S_ISREG(newinode->i_mode)) {
/*
* The server may allow us to open things like
@@ -399,10 +422,14 @@ cifs_create_set_dentry:
if (rc != 0) {
cifs_dbg(FYI, "Create worked, get_inode_info failed rc = %d\n",
rc);
- if (server->ops->close)
- server->ops->close(xid, tcon, fid);
- goto out;
+ goto out_err;
}
+
+ if (S_ISDIR(newinode->i_mode)) {
+ rc = -EISDIR;
+ goto out_err;
+ }
+
d_drop(direntry);
d_add(direntry, newinode);
@@ -410,6 +437,13 @@ out:
kfree(buf);
kfree(full_path);
return rc;
+
+out_err:
+ if (server->ops->close)
+ server->ops->close(xid, tcon, fid);
+ if (newinode)
+ iput(newinode);
+ goto out;
}
int
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index a329f5ba35aa..9cdeb0293267 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -982,10 +982,26 @@ struct inode *cifs_root_iget(struct super_block *sb)
struct inode *inode = NULL;
long rc;
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+ char *path = NULL;
+ int len;
+
+ if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
+ && cifs_sb->prepath) {
+ len = strlen(cifs_sb->prepath);
+ path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL);
+ if (path == NULL)
+ return ERR_PTR(-ENOMEM);
+ path[0] = '/';
+ memcpy(path+1, cifs_sb->prepath, len);
+ } else {
+ path = kstrdup("", GFP_KERNEL);
+ if (path == NULL)
+ return ERR_PTR(-ENOMEM);
+ }
xid = get_xid();
if (tcon->unix_ext) {
- rc = cifs_get_inode_info_unix(&inode, "", sb, xid);
+ rc = cifs_get_inode_info_unix(&inode, path, sb, xid);
/* some servers mistakenly claim POSIX support */
if (rc != -EOPNOTSUPP)
goto iget_no_retry;
@@ -993,7 +1009,8 @@ struct inode *cifs_root_iget(struct super_block *sb)
tcon->unix_ext = false;
}
- rc = cifs_get_inode_info(&inode, "", NULL, sb, xid, NULL);
+ convert_delimiter(path, CIFS_DIR_SEP(cifs_sb));
+ rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL);
iget_no_retry:
if (!inode) {
@@ -1022,6 +1039,7 @@ iget_no_retry:
}
out:
+ kfree(path);
/* can not call macro free_xid here since in a void func
* TODO: This is no longer true
*/
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 53ccdde6ff18..dd8543caa56e 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1039,6 +1039,9 @@ smb2_new_lease_key(struct cifs_fid *fid)
get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
}
+#define SMB2_SYMLINK_STRUCT_SIZE \
+ (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
+
static int
smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
const char *full_path, char **target_path,
@@ -1051,7 +1054,10 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid fid;
struct smb2_err_rsp *err_buf = NULL;
struct smb2_symlink_err_rsp *symlink;
- unsigned int sub_len, sub_offset;
+ unsigned int sub_len;
+ unsigned int sub_offset;
+ unsigned int print_len;
+ unsigned int print_offset;
cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
@@ -1072,11 +1078,33 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
kfree(utf16_path);
return -ENOENT;
}
+
+ if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
+ get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
+ kfree(utf16_path);
+ return -ENOENT;
+ }
+
/* open must fail on symlink - reset rc */
rc = 0;
symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
sub_len = le16_to_cpu(symlink->SubstituteNameLength);
sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
+ print_len = le16_to_cpu(symlink->PrintNameLength);
+ print_offset = le16_to_cpu(symlink->PrintNameOffset);
+
+ if (get_rfc1002_length(err_buf) + 4 <
+ SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
+ kfree(utf16_path);
+ return -ENOENT;
+ }
+
+ if (get_rfc1002_length(err_buf) + 4 <
+ SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
+ kfree(utf16_path);
+ return -ENOENT;
+ }
+
*target_path = cifs_strndup_from_utf16(
(char *)symlink->PathBuffer + sub_offset,
sub_len, true, cifs_sb->local_nls);
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 11309683d65f..27794b137b24 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -112,7 +112,6 @@ static int ecryptfs_readdir(struct file *file, struct dir_context *ctx)
.sb = inode->i_sb,
};
lower_file = ecryptfs_file_to_lower(file);
- lower_file->f_pos = ctx->pos;
rc = iterate_dir(lower_file, &buf.ctx);
ctx->pos = buf.ctx.pos;
if (rc < 0)
@@ -236,14 +235,6 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
}
ecryptfs_set_file_lower(
file, ecryptfs_inode_to_private(inode)->lower_file);
- if (d_is_dir(ecryptfs_dentry)) {
- ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
- mutex_lock(&crypt_stat->cs_mutex);
- crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
- mutex_unlock(&crypt_stat->cs_mutex);
- rc = 0;
- goto out;
- }
rc = read_or_initialize_metadata(ecryptfs_dentry);
if (rc)
goto out_put;
@@ -260,6 +251,45 @@ out:
return rc;
}
+/**
+ * ecryptfs_dir_open
+ * @inode: inode speciying file to open
+ * @file: Structure to return filled in
+ *
+ * Opens the file specified by inode.
+ *
+ * Returns zero on success; non-zero otherwise
+ */
+static int ecryptfs_dir_open(struct inode *inode, struct file *file)
+{
+ struct dentry *ecryptfs_dentry = file->f_path.dentry;
+ /* Private value of ecryptfs_dentry allocated in
+ * ecryptfs_lookup() */
+ struct ecryptfs_file_info *file_info;
+ struct file *lower_file;
+
+ /* Released in ecryptfs_release or end of function if failure */
+ file_info = kmem_cache_zalloc(ecryptfs_file_info_cache, GFP_KERNEL);
+ ecryptfs_set_file_private(file, file_info);
+ if (unlikely(!file_info)) {
+ ecryptfs_printk(KERN_ERR,
+ "Error attempting to allocate memory\n");
+ return -ENOMEM;
+ }
+ lower_file = dentry_open(ecryptfs_dentry_to_lower_path(ecryptfs_dentry),
+ file->f_flags, current_cred());
+ if (IS_ERR(lower_file)) {
+ printk(KERN_ERR "%s: Error attempting to initialize "
+ "the lower file for the dentry with name "
+ "[%pd]; rc = [%ld]\n", __func__,
+ ecryptfs_dentry, PTR_ERR(lower_file));
+ kmem_cache_free(ecryptfs_file_info_cache, file_info);
+ return PTR_ERR(lower_file);
+ }
+ ecryptfs_set_file_lower(file, lower_file);
+ return 0;
+}
+
static int ecryptfs_flush(struct file *file, fl_owner_t td)
{
struct file *lower_file = ecryptfs_file_to_lower(file);
@@ -280,6 +310,19 @@ static int ecryptfs_release(struct inode *inode, struct file *file)
return 0;
}
+static int ecryptfs_dir_release(struct inode *inode, struct file *file)
+{
+ fput(ecryptfs_file_to_lower(file));
+ kmem_cache_free(ecryptfs_file_info_cache,
+ ecryptfs_file_to_private(file));
+ return 0;
+}
+
+static loff_t ecryptfs_dir_llseek(struct file *file, loff_t offset, int whence)
+{
+ return vfs_llseek(ecryptfs_file_to_lower(file), offset, whence);
+}
+
static int
ecryptfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
@@ -359,20 +402,16 @@ const struct file_operations ecryptfs_dir_fops = {
#ifdef CONFIG_COMPAT
.compat_ioctl = ecryptfs_compat_ioctl,
#endif
- .open = ecryptfs_open,
- .flush = ecryptfs_flush,
- .release = ecryptfs_release,
+ .open = ecryptfs_dir_open,
+ .release = ecryptfs_dir_release,
.fsync = ecryptfs_fsync,
- .fasync = ecryptfs_fasync,
- .splice_read = generic_file_splice_read,
- .llseek = default_llseek,
+ .llseek = ecryptfs_dir_llseek,
};
const struct file_operations ecryptfs_main_fops = {
.llseek = generic_file_llseek,
.read_iter = ecryptfs_read_update_atime,
.write_iter = generic_file_write_iter,
- .iterate = ecryptfs_readdir,
.unlocked_ioctl = ecryptfs_unlocked_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ecryptfs_compat_ioctl,
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9a5ad0f0d3ed..28702932a908 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -51,25 +51,31 @@ static __u32 ext4_inode_csum(struct inode *inode, struct ext4_inode *raw,
struct ext4_inode_info *ei)
{
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
- __u16 csum_lo;
- __u16 csum_hi = 0;
__u32 csum;
+ __u16 dummy_csum = 0;
+ int offset = offsetof(struct ext4_inode, i_checksum_lo);
+ unsigned int csum_size = sizeof(dummy_csum);
- csum_lo = le16_to_cpu(raw->i_checksum_lo);
- raw->i_checksum_lo = 0;
- if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
- EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi)) {
- csum_hi = le16_to_cpu(raw->i_checksum_hi);
- raw->i_checksum_hi = 0;
- }
+ csum = ext4_chksum(sbi, ei->i_csum_seed, (__u8 *)raw, offset);
+ csum = ext4_chksum(sbi, csum, (__u8 *)&dummy_csum, csum_size);
+ offset += csum_size;
+ csum = ext4_chksum(sbi, csum, (__u8 *)raw + offset,
+ EXT4_GOOD_OLD_INODE_SIZE - offset);
- csum = ext4_chksum(sbi, ei->i_csum_seed, (__u8 *)raw,
- EXT4_INODE_SIZE(inode->i_sb));
-
- raw->i_checksum_lo = cpu_to_le16(csum_lo);
- if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
- EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi))
- raw->i_checksum_hi = cpu_to_le16(csum_hi);
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
+ offset = offsetof(struct ext4_inode, i_checksum_hi);
+ csum = ext4_chksum(sbi, csum, (__u8 *)raw +
+ EXT4_GOOD_OLD_INODE_SIZE,
+ offset - EXT4_GOOD_OLD_INODE_SIZE);
+ if (EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi)) {
+ csum = ext4_chksum(sbi, csum, (__u8 *)&dummy_csum,
+ csum_size);
+ offset += csum_size;
+ csum = ext4_chksum(sbi, csum, (__u8 *)raw + offset,
+ EXT4_INODE_SIZE(inode->i_sb) -
+ offset);
+ }
+ }
return csum;
}
@@ -5186,8 +5192,6 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode)
sbi->s_want_extra_isize,
iloc, handle);
if (ret) {
- ext4_set_inode_state(inode,
- EXT4_STATE_NO_EXPAND);
if (mnt_count !=
le16_to_cpu(sbi->s_es->s_mnt_count)) {
ext4_warning(inode->i_sb,
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 91bf36f22dbf..38eb0c8e43b9 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -420,15 +420,14 @@ static __le32 ext4_dx_csum(struct inode *inode, struct ext4_dir_entry *dirent,
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
struct ext4_inode_info *ei = EXT4_I(inode);
__u32 csum;
- __le32 save_csum;
int size;
+ __u32 dummy_csum = 0;
+ int offset = offsetof(struct dx_tail, dt_checksum);
size = count_offset + (count * sizeof(struct dx_entry));
- save_csum = t->dt_checksum;
- t->dt_checksum = 0;
csum = ext4_chksum(sbi, ei->i_csum_seed, (__u8 *)dirent, size);
- csum = ext4_chksum(sbi, csum, (__u8 *)t, sizeof(struct dx_tail));
- t->dt_checksum = save_csum;
+ csum = ext4_chksum(sbi, csum, (__u8 *)t, offset);
+ csum = ext4_chksum(sbi, csum, (__u8 *)&dummy_csum, sizeof(dummy_csum));
return cpu_to_le32(csum);
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c542ebcf7a92..5bab28caa9d4 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2030,23 +2030,25 @@ failed:
static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group,
struct ext4_group_desc *gdp)
{
- int offset;
+ int offset = offsetof(struct ext4_group_desc, bg_checksum);
__u16 crc = 0;
__le32 le_group = cpu_to_le32(block_group);
struct ext4_sb_info *sbi = EXT4_SB(sb);
if (ext4_has_metadata_csum(sbi->s_sb)) {
/* Use new metadata_csum algorithm */
- __le16 save_csum;
__u32 csum32;
+ __u16 dummy_csum = 0;
- save_csum = gdp->bg_checksum;
- gdp->bg_checksum = 0;
csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group,
sizeof(le_group));
- csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp,
- sbi->s_desc_size);
- gdp->bg_checksum = save_csum;
+ csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset);
+ csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum,
+ sizeof(dummy_csum));
+ offset += sizeof(dummy_csum);
+ if (offset < sbi->s_desc_size)
+ csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset,
+ sbi->s_desc_size - offset);
crc = csum32 & 0xFFFF;
goto out;
@@ -2056,8 +2058,6 @@ static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group,
if (!ext4_has_feature_gdt_csum(sb))
return 0;
- offset = offsetof(struct ext4_group_desc, bg_checksum);
-
crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid));
crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group));
crc = crc16(crc, (__u8 *)gdp, offset);
@@ -2093,6 +2093,7 @@ void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group,
/* Called at mount-time, super-block is locked */
static int ext4_check_descriptors(struct super_block *sb,
+ ext4_fsblk_t sb_block,
ext4_group_t *first_not_zeroed)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -2123,6 +2124,11 @@ static int ext4_check_descriptors(struct super_block *sb,
grp = i;
block_bitmap = ext4_block_bitmap(sb, gdp);
+ if (block_bitmap == sb_block) {
+ ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
+ "Block bitmap for group %u overlaps "
+ "superblock", i);
+ }
if (block_bitmap < first_block || block_bitmap > last_block) {
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
"Block bitmap for group %u not in group "
@@ -2130,6 +2136,11 @@ static int ext4_check_descriptors(struct super_block *sb,
return 0;
}
inode_bitmap = ext4_inode_bitmap(sb, gdp);
+ if (inode_bitmap == sb_block) {
+ ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
+ "Inode bitmap for group %u overlaps "
+ "superblock", i);
+ }
if (inode_bitmap < first_block || inode_bitmap > last_block) {
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
"Inode bitmap for group %u not in group "
@@ -2137,6 +2148,11 @@ static int ext4_check_descriptors(struct super_block *sb,
return 0;
}
inode_table = ext4_inode_table(sb, gdp);
+ if (inode_table == sb_block) {
+ ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
+ "Inode table for group %u overlaps "
+ "superblock", i);
+ }
if (inode_table < first_block ||
inode_table + sbi->s_itb_per_group - 1 > last_block) {
ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: "
@@ -3640,7 +3656,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount2;
}
}
- if (!ext4_check_descriptors(sb, &first_not_zeroed)) {
+ if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
ret = -EFSCORRUPTED;
goto failed_mount2;
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 6b6b3e751f8c..263002f0389d 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -123,17 +123,18 @@ static __le32 ext4_xattr_block_csum(struct inode *inode,
{
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
__u32 csum;
- __le32 save_csum;
__le64 dsk_block_nr = cpu_to_le64(block_nr);
+ __u32 dummy_csum = 0;
+ int offset = offsetof(struct ext4_xattr_header, h_checksum);
- save_csum = hdr->h_checksum;
- hdr->h_checksum = 0;
csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&dsk_block_nr,
sizeof(dsk_block_nr));
- csum = ext4_chksum(sbi, csum, (__u8 *)hdr,
- EXT4_BLOCK_SIZE(inode->i_sb));
+ csum = ext4_chksum(sbi, csum, (__u8 *)hdr, offset);
+ csum = ext4_chksum(sbi, csum, (__u8 *)&dummy_csum, sizeof(dummy_csum));
+ offset += sizeof(dummy_csum);
+ csum = ext4_chksum(sbi, csum, (__u8 *)hdr + offset,
+ EXT4_BLOCK_SIZE(inode->i_sb) - offset);
- hdr->h_checksum = save_csum;
return cpu_to_le32(csum);
}
@@ -1264,15 +1265,19 @@ int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
size_t min_offs, free;
int total_ino;
void *base, *start, *end;
- int extra_isize = 0, error = 0, tried_min_extra_isize = 0;
+ int error = 0, tried_min_extra_isize = 0;
int s_min_extra_isize = le16_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_min_extra_isize);
+ int isize_diff; /* How much do we need to grow i_extra_isize */
down_write(&EXT4_I(inode)->xattr_sem);
+ /*
+ * Set EXT4_STATE_NO_EXPAND to avoid recursion when marking inode dirty
+ */
+ ext4_set_inode_state(inode, EXT4_STATE_NO_EXPAND);
retry:
- if (EXT4_I(inode)->i_extra_isize >= new_extra_isize) {
- up_write(&EXT4_I(inode)->xattr_sem);
- return 0;
- }
+ isize_diff = new_extra_isize - EXT4_I(inode)->i_extra_isize;
+ if (EXT4_I(inode)->i_extra_isize >= new_extra_isize)
+ goto out;
header = IHDR(inode, raw_inode);
entry = IFIRST(header);
@@ -1289,7 +1294,7 @@ retry:
total_ino = sizeof(struct ext4_xattr_ibody_header);
free = ext4_xattr_free_space(last, &min_offs, base, &total_ino);
- if (free >= new_extra_isize) {
+ if (free >= isize_diff) {
entry = IFIRST(header);
ext4_xattr_shift_entries(entry, EXT4_I(inode)->i_extra_isize
- new_extra_isize, (void *)raw_inode +
@@ -1297,8 +1302,7 @@ retry:
(void *)header, total_ino,
inode->i_sb->s_blocksize);
EXT4_I(inode)->i_extra_isize = new_extra_isize;
- error = 0;
- goto cleanup;
+ goto out;
}
/*
@@ -1321,7 +1325,7 @@ retry:
end = bh->b_data + bh->b_size;
min_offs = end - base;
free = ext4_xattr_free_space(first, &min_offs, base, NULL);
- if (free < new_extra_isize) {
+ if (free < isize_diff) {
if (!tried_min_extra_isize && s_min_extra_isize) {
tried_min_extra_isize++;
new_extra_isize = s_min_extra_isize;
@@ -1335,7 +1339,7 @@ retry:
free = inode->i_sb->s_blocksize;
}
- while (new_extra_isize > 0) {
+ while (isize_diff > 0) {
size_t offs, size, entry_size;
struct ext4_xattr_entry *small_entry = NULL;
struct ext4_xattr_info i = {
@@ -1366,7 +1370,7 @@ retry:
EXT4_XATTR_SIZE(le32_to_cpu(last->e_value_size)) +
EXT4_XATTR_LEN(last->e_name_len);
if (total_size <= free && total_size < min_total_size) {
- if (total_size < new_extra_isize) {
+ if (total_size < isize_diff) {
small_entry = last;
} else {
entry = last;
@@ -1421,22 +1425,22 @@ retry:
error = ext4_xattr_ibody_set(handle, inode, &i, is);
if (error)
goto cleanup;
+ total_ino -= entry_size;
entry = IFIRST(header);
- if (entry_size + EXT4_XATTR_SIZE(size) >= new_extra_isize)
- shift_bytes = new_extra_isize;
+ if (entry_size + EXT4_XATTR_SIZE(size) >= isize_diff)
+ shift_bytes = isize_diff;
else
- shift_bytes = entry_size + size;
+ shift_bytes = entry_size + EXT4_XATTR_SIZE(size);
/* Adjust the offsets and shift the remaining entries ahead */
- ext4_xattr_shift_entries(entry, EXT4_I(inode)->i_extra_isize -
- shift_bytes, (void *)raw_inode +
- EXT4_GOOD_OLD_INODE_SIZE + extra_isize + shift_bytes,
- (void *)header, total_ino - entry_size,
- inode->i_sb->s_blocksize);
+ ext4_xattr_shift_entries(entry, -shift_bytes,
+ (void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE +
+ EXT4_I(inode)->i_extra_isize + shift_bytes,
+ (void *)header, total_ino, inode->i_sb->s_blocksize);
- extra_isize += shift_bytes;
- new_extra_isize -= shift_bytes;
- EXT4_I(inode)->i_extra_isize = extra_isize;
+ isize_diff -= shift_bytes;
+ EXT4_I(inode)->i_extra_isize += shift_bytes;
+ header = IHDR(inode, raw_inode);
i.name = b_entry_name;
i.value = buffer;
@@ -1458,6 +1462,8 @@ retry:
kfree(bs);
}
brelse(bh);
+out:
+ ext4_clear_inode_state(inode, EXT4_STATE_NO_EXPAND);
up_write(&EXT4_I(inode)->xattr_sem);
return 0;
@@ -1469,6 +1475,10 @@ cleanup:
kfree(is);
kfree(bs);
brelse(bh);
+ /*
+ * We deliberately leave EXT4_STATE_NO_EXPAND set here since inode
+ * size expansion failed.
+ */
up_write(&EXT4_I(inode)->xattr_sem);
return error;
}
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 36345fefa3ff..2d964ce45606 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -124,7 +124,7 @@ static int journal_submit_commit_record(journal_t *journal,
struct commit_header *tmp;
struct buffer_head *bh;
int ret;
- struct timespec now = current_kernel_time();
+ struct timespec64 now = current_kernel_time64();
*cbh = NULL;
diff --git a/fs/namei.c b/fs/namei.c
index 209ca7737cb2..0b0acba72a71 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -887,6 +887,7 @@ static inline int may_follow_link(struct nameidata *nd)
{
const struct inode *inode;
const struct inode *parent;
+ kuid_t puid;
if (!sysctl_protected_symlinks)
return 0;
@@ -902,7 +903,8 @@ static inline int may_follow_link(struct nameidata *nd)
return 0;
/* Allowed if parent directory and link owner match. */
- if (uid_eq(parent->i_uid, inode->i_uid))
+ puid = parent->i_uid;
+ if (uid_valid(puid) && uid_eq(puid, inode->i_uid))
return 0;
if (nd->flags & LOOKUP_RCU)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 7b9316406930..7a9b6e347249 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1261,6 +1261,9 @@ int nfs_updatepage(struct file *file, struct page *page,
dprintk("NFS: nfs_updatepage(%pD2 %d@%lld)\n",
file, count, (long long)(page_file_offset(page) + offset));
+ if (!count)
+ goto out;
+
if (nfs_can_extend_write(file, page, inode)) {
count = max(count + offset, nfs_page_length(page));
offset = 0;
@@ -1271,7 +1274,7 @@ int nfs_updatepage(struct file *file, struct page *page,
nfs_set_pageerror(page);
else
__set_page_dirty_nobuffers(page);
-
+out:
dprintk("NFS: nfs_updatepage returns %d (isize %lld)\n",
status, (long long)i_size_read(inode));
return status;
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index ed2f64ca49de..f7ea624780a7 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4882,6 +4882,32 @@ nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return nfs_ok;
}
+static __be32
+nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s)
+{
+ struct nfs4_ol_stateid *stp = openlockstateid(s);
+ __be32 ret;
+
+ mutex_lock(&stp->st_mutex);
+
+ ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
+ if (ret)
+ goto out;
+
+ ret = nfserr_locks_held;
+ if (check_for_locks(stp->st_stid.sc_file,
+ lockowner(stp->st_stateowner)))
+ goto out;
+
+ release_lock_stateid(stp);
+ ret = nfs_ok;
+
+out:
+ mutex_unlock(&stp->st_mutex);
+ nfs4_put_stid(s);
+ return ret;
+}
+
__be32
nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_free_stateid *free_stateid)
@@ -4889,7 +4915,6 @@ nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
stateid_t *stateid = &free_stateid->fr_stateid;
struct nfs4_stid *s;
struct nfs4_delegation *dp;
- struct nfs4_ol_stateid *stp;
struct nfs4_client *cl = cstate->session->se_client;
__be32 ret = nfserr_bad_stateid;
@@ -4908,18 +4933,9 @@ nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ret = nfserr_locks_held;
break;
case NFS4_LOCK_STID:
- ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
- if (ret)
- break;
- stp = openlockstateid(s);
- ret = nfserr_locks_held;
- if (check_for_locks(stp->st_stid.sc_file,
- lockowner(stp->st_stateowner)))
- break;
- WARN_ON(!unhash_lock_stateid(stp));
+ atomic_inc(&s->sc_count);
spin_unlock(&cl->cl_lock);
- nfs4_put_stid(s);
- ret = nfs_ok;
+ ret = nfsd4_free_lock_stateid(stateid, s);
goto out;
case NFS4_REVOKED_DELEG_STID:
dp = delegstateid(s);
@@ -5486,7 +5502,7 @@ static __be32
lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
struct nfs4_ol_stateid *ost,
struct nfsd4_lock *lock,
- struct nfs4_ol_stateid **lst, bool *new)
+ struct nfs4_ol_stateid **plst, bool *new)
{
__be32 status;
struct nfs4_file *fi = ost->st_stid.sc_file;
@@ -5494,7 +5510,9 @@ lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
struct nfs4_client *cl = oo->oo_owner.so_client;
struct inode *inode = d_inode(cstate->current_fh.fh_dentry);
struct nfs4_lockowner *lo;
+ struct nfs4_ol_stateid *lst;
unsigned int strhashval;
+ bool hashed;
lo = find_lockowner_str(cl, &lock->lk_new_owner);
if (!lo) {
@@ -5510,12 +5528,27 @@ lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
goto out;
}
- *lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
- if (*lst == NULL) {
+retry:
+ lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
+ if (lst == NULL) {
status = nfserr_jukebox;
goto out;
}
+
+ mutex_lock(&lst->st_mutex);
+
+ /* See if it's still hashed to avoid race with FREE_STATEID */
+ spin_lock(&cl->cl_lock);
+ hashed = !list_empty(&lst->st_perfile);
+ spin_unlock(&cl->cl_lock);
+
+ if (!hashed) {
+ mutex_unlock(&lst->st_mutex);
+ nfs4_put_stid(&lst->st_stid);
+ goto retry;
+ }
status = nfs_ok;
+ *plst = lst;
out:
nfs4_put_stateowner(&lo->lo_owner);
return status;
@@ -5582,8 +5615,6 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
status = lookup_or_create_lock_state(cstate, open_stp, lock,
&lock_stp, &new);
- if (status == nfs_ok)
- mutex_lock(&lock_stp->st_mutex);
} else {
status = nfs4_preprocess_seqid_op(cstate,
lock->lk_old_lock_seqid,
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index eff6319d5037..9e52609cd683 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -48,6 +48,8 @@ int ovl_copy_xattr(struct dentry *old, struct dentry *new)
}
for (name = buf; name < (buf + list_size); name += strlen(name) + 1) {
+ if (ovl_is_private_xattr(name))
+ continue;
retry:
size = vfs_getxattr(old, name, value, value_size);
if (size == -ERANGE)
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 4f729ffff75d..220b04f04523 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -219,7 +219,7 @@ static int ovl_readlink(struct dentry *dentry, char __user *buf, int bufsiz)
}
-static bool ovl_is_private_xattr(const char *name)
+bool ovl_is_private_xattr(const char *name)
{
return strncmp(name, OVL_XATTR_PRE_NAME, OVL_XATTR_PRE_LEN) == 0;
}
@@ -277,7 +277,8 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
struct path realpath;
enum ovl_path_type type = ovl_path_real(dentry, &realpath);
ssize_t res;
- int off;
+ size_t len;
+ char *s;
res = vfs_listxattr(realpath.dentry, list, size);
if (res <= 0 || size == 0)
@@ -287,17 +288,19 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
return res;
/* filter out private xattrs */
- for (off = 0; off < res;) {
- char *s = list + off;
- size_t slen = strlen(s) + 1;
+ for (s = list, len = res; len;) {
+ size_t slen = strnlen(s, len) + 1;
- BUG_ON(off + slen > res);
+ /* underlying fs providing us with an broken xattr list? */
+ if (WARN_ON(slen > len))
+ return -EIO;
+ len -= slen;
if (ovl_is_private_xattr(s)) {
res -= slen;
- memmove(s, s + slen, res - off);
+ memmove(s, s + slen, len);
} else {
- off += slen;
+ s += slen;
}
}
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 735e1d49b301..c319d5eaabcf 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -174,6 +174,7 @@ ssize_t ovl_getxattr(struct dentry *dentry, const char *name,
ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
int ovl_removexattr(struct dentry *dentry, const char *name);
struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags);
+bool ovl_is_private_xattr(const char *name);
struct inode *ovl_new_inode(struct super_block *sb, umode_t mode,
struct ovl_entry *oe);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index a1acc6004a91..d70208c0de84 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -376,7 +376,8 @@ static struct ovl_entry *ovl_alloc_entry(unsigned int numlower)
static bool ovl_dentry_remote(struct dentry *dentry)
{
return dentry->d_flags &
- (DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE);
+ (DCACHE_OP_REVALIDATE | DCACHE_OP_WEAK_REVALIDATE |
+ DCACHE_OP_REAL);
}
static bool ovl_dentry_weird(struct dentry *dentry)
@@ -762,6 +763,10 @@ retry:
struct kstat stat = {
.mode = S_IFDIR | 0,
};
+ struct iattr attr = {
+ .ia_valid = ATTR_MODE,
+ .ia_mode = stat.mode,
+ };
if (work->d_inode) {
err = -EEXIST;
@@ -777,6 +782,21 @@ retry:
err = ovl_create_real(dir, work, &stat, NULL, NULL, true);
if (err)
goto out_dput;
+
+ err = vfs_removexattr(work, XATTR_NAME_POSIX_ACL_DEFAULT);
+ if (err && err != -ENODATA && err != -EOPNOTSUPP)
+ goto out_dput;
+
+ err = vfs_removexattr(work, XATTR_NAME_POSIX_ACL_ACCESS);
+ if (err && err != -ENODATA && err != -EOPNOTSUPP)
+ goto out_dput;
+
+ /* Clear any inherited mode bits */
+ inode_lock(work->d_inode);
+ err = notify_change(work, &attr, NULL);
+ inode_unlock(work->d_inode);
+ if (err)
+ goto out_dput;
}
out_unlock:
mutex_unlock(&dir->i_mutex);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index f6478301db00..d598b9c809c1 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -248,23 +248,29 @@ static int do_maps_open(struct inode *inode, struct file *file,
sizeof(struct proc_maps_private));
}
-static pid_t pid_of_stack(struct proc_maps_private *priv,
- struct vm_area_struct *vma, bool is_pid)
+/*
+ * Indicate if the VMA is a stack for the given task; for
+ * /proc/PID/maps that is the stack of the main task.
+ */
+static int is_stack(struct proc_maps_private *priv,
+ struct vm_area_struct *vma, int is_pid)
{
- struct inode *inode = priv->inode;
- struct task_struct *task;
- pid_t ret = 0;
+ int stack = 0;
+
+ if (is_pid) {
+ stack = vma->vm_start <= vma->vm_mm->start_stack &&
+ vma->vm_end >= vma->vm_mm->start_stack;
+ } else {
+ struct inode *inode = priv->inode;
+ struct task_struct *task;
- rcu_read_lock();
- task = pid_task(proc_pid(inode), PIDTYPE_PID);
- if (task) {
- task = task_of_stack(task, vma, is_pid);
+ rcu_read_lock();
+ task = pid_task(proc_pid(inode), PIDTYPE_PID);
if (task)
- ret = task_pid_nr_ns(task, inode->i_sb->s_fs_info);
+ stack = vma_is_stack_for_task(vma, task);
+ rcu_read_unlock();
}
- rcu_read_unlock();
-
- return ret;
+ return stack;
}
static void
@@ -324,8 +330,6 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
name = arch_vma_name(vma);
if (!name) {
- pid_t tid;
-
if (!mm) {
name = "[vdso]";
goto done;
@@ -337,21 +341,8 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
goto done;
}
- tid = pid_of_stack(priv, vma, is_pid);
- if (tid != 0) {
- /*
- * Thread stack in /proc/PID/task/TID/maps or
- * the main process stack.
- */
- if (!is_pid || (vma->vm_start <= mm->start_stack &&
- vma->vm_end >= mm->start_stack)) {
- name = "[stack]";
- } else {
- /* Thread stack in /proc/PID/maps */
- seq_pad(m, ' ');
- seq_printf(m, "[stack:%d]", tid);
- }
- }
+ if (is_stack(priv, vma, is_pid))
+ name = "[stack]";
}
done:
@@ -1566,19 +1557,8 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
seq_file_path(m, file, "\n\t= ");
} else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) {
seq_puts(m, " heap");
- } else {
- pid_t tid = pid_of_stack(proc_priv, vma, is_pid);
- if (tid != 0) {
- /*
- * Thread stack in /proc/PID/task/TID/maps or
- * the main process stack.
- */
- if (!is_pid || (vma->vm_start <= mm->start_stack &&
- vma->vm_end >= mm->start_stack))
- seq_puts(m, " stack");
- else
- seq_printf(m, " stack:%d", tid);
- }
+ } else if (is_stack(proc_priv, vma, is_pid)) {
+ seq_puts(m, " stack");
}
if (is_vm_hugetlb_page(vma))
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index e0d64c92e4f6..faacb0c0d857 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -123,23 +123,26 @@ unsigned long task_statm(struct mm_struct *mm,
return size;
}
-static pid_t pid_of_stack(struct proc_maps_private *priv,
- struct vm_area_struct *vma, bool is_pid)
+static int is_stack(struct proc_maps_private *priv,
+ struct vm_area_struct *vma, int is_pid)
{
- struct inode *inode = priv->inode;
- struct task_struct *task;
- pid_t ret = 0;
-
- rcu_read_lock();
- task = pid_task(proc_pid(inode), PIDTYPE_PID);
- if (task) {
- task = task_of_stack(task, vma, is_pid);
+ struct mm_struct *mm = vma->vm_mm;
+ int stack = 0;
+
+ if (is_pid) {
+ stack = vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack;
+ } else {
+ struct inode *inode = priv->inode;
+ struct task_struct *task;
+
+ rcu_read_lock();
+ task = pid_task(proc_pid(inode), PIDTYPE_PID);
if (task)
- ret = task_pid_nr_ns(task, inode->i_sb->s_fs_info);
+ stack = vma_is_stack_for_task(vma, task);
+ rcu_read_unlock();
}
- rcu_read_unlock();
-
- return ret;
+ return stack;
}
/*
@@ -181,21 +184,9 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
if (file) {
seq_pad(m, ' ');
seq_file_path(m, file, "");
- } else if (mm) {
- pid_t tid = pid_of_stack(priv, vma, is_pid);
-
- if (tid != 0) {
- seq_pad(m, ' ');
- /*
- * Thread stack in /proc/PID/task/TID/maps or
- * the main process stack.
- */
- if (!is_pid || (vma->vm_start <= mm->start_stack &&
- vma->vm_end >= mm->start_stack))
- seq_printf(m, "[stack]");
- else
- seq_printf(m, "[stack:%d]", tid);
- }
+ } else if (mm && is_stack(priv, vma, is_pid)) {
+ seq_pad(m, ' ');
+ seq_printf(m, "[stack]");
}
seq_putc(m, '\n');
diff --git a/fs/seq_file.c b/fs/seq_file.c
index e85664b7c7d9..d672e2fec459 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -222,8 +222,10 @@ ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
size -= n;
buf += n;
copied += n;
- if (!m->count)
+ if (!m->count) {
+ m->from = 0;
m->index++;
+ }
if (!size)
goto Done;
}
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index f35523d4fa3a..b803213d1307 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -114,9 +114,15 @@ static ssize_t sysfs_kf_read(struct kernfs_open_file *of, char *buf,
* If buf != of->prealloc_buf, we don't know how
* large it is, so cannot safely pass it to ->show
*/
- if (pos || WARN_ON_ONCE(buf != of->prealloc_buf))
+ if (WARN_ON_ONCE(buf != of->prealloc_buf))
return 0;
len = ops->show(kobj, of->kn->priv, buf);
+ if (pos) {
+ if (len <= pos)
+ return 0;
+ len -= pos;
+ memmove(buf, buf + pos, len);
+ }
return min(count, len);
}
diff --git a/fs/ubifs/tnc_commit.c b/fs/ubifs/tnc_commit.c
index b45345d701e7..51157da3f76e 100644
--- a/fs/ubifs/tnc_commit.c
+++ b/fs/ubifs/tnc_commit.c
@@ -370,7 +370,7 @@ static int layout_in_gaps(struct ubifs_info *c, int cnt)
p = c->gap_lebs;
do {
- ubifs_assert(p < c->gap_lebs + sizeof(int) * c->lst.idx_lebs);
+ ubifs_assert(p < c->gap_lebs + c->lst.idx_lebs);
written = layout_leb_in_gaps(c, p);
if (written < 0) {
err = written;
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 8a53eaa349f4..7088be6afb3c 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -581,7 +581,8 @@ xfs_sb_verify(
* Only check the in progress field for the primary superblock as
* mkfs.xfs doesn't clear it from secondary superblocks.
*/
- return xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR,
+ return xfs_mount_validate_sb(mp, &sb,
+ bp->b_maps[0].bm_bn == XFS_SB_DADDR,
check_version);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-15 18:59:46 +0000