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authorAndries Brouwer <Andries.Brouwer@cwi.nl>2006-08-27 01:23:42 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-27 11:01:30 -0700
commitf5fb09fa3392ad43fbcfc2f4580752f383ab5996 (patch)
treee151061443d358d484e851d2f4d4fec5e9d2eb97 /fs/minix
parentfb8d81e47783f9198f3d6248bd4c0d16a1d5424e (diff)
downloadlinux-linaro-f5fb09fa3392ad43fbcfc2f4580752f383ab5996.tar.gz
[PATCH] Fix for minix crash
Mounting a (corrupt) minix filesystem with zero s_zmap_blocks gives a spectacular crash on my 2.6.17.8 system, no doubt because minix/inode.c does an unconditional minix_set_bit(0,sbi->s_zmap[0]->b_data); [akpm@osdl.org: make labels conistent while we're there] Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/minix')
-rw-r--r--fs/minix/inode.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 9ea91c5eeb7..330ff9fc7cf 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -204,6 +204,8 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
/*
* Allocate the buffer map to keep the superblock small.
*/
+ if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0)
+ goto out_illegal_sb;
i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh);
map = kmalloc(i, GFP_KERNEL);
if (!map)
@@ -263,7 +265,7 @@ out_no_root:
out_no_bitmap:
printk("MINIX-fs: bad superblock or unable to read bitmaps\n");
- out_freemap:
+out_freemap:
for (i = 0; i < sbi->s_imap_blocks; i++)
brelse(sbi->s_imap[i]);
for (i = 0; i < sbi->s_zmap_blocks; i++)
@@ -276,11 +278,16 @@ out_no_map:
printk("MINIX-fs: can't allocate map\n");
goto out_release;
+out_illegal_sb:
+ if (!silent)
+ printk("MINIX-fs: bad superblock\n");
+ goto out_release;
+
out_no_fs:
if (!silent)
printk("VFS: Can't find a Minix or Minix V2 filesystem "
"on device %s\n", s->s_id);
- out_release:
+out_release:
brelse(bh);
goto out;
@@ -290,7 +297,7 @@ out_bad_hblock:
out_bad_sb:
printk("MINIX-fs: unable to read superblock\n");
- out:
+out:
s->s_fs_info = NULL;
kfree(sbi);
return -EINVAL;