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authorEric Sandeen <sandeen@sandeen.net>2006-08-05 12:15:17 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-06 08:57:49 -0700
commit225add619624b4877941470f31d297e0151b21be (patch)
tree5c47608e3a45934e511b4e7979c62a601a24683f
parentce2c6b53847afc444c4d0a7a1075c61f499c57a5 (diff)
downloadlinux-2.6.34-ux500-225add619624b4877941470f31d297e0151b21be.tar.gz
[PATCH] udf: initialize parts of inode earlier in create
I saw an oops down this path when trying to create a new file on a UDF filesystem which was internally marked as readonly, but mounted rw: udf_create udf_new_inode new_inode alloc_inode udf_alloc_inode udf_new_block returns EIO due to readonlyness iput (on error) udf_put_inode udf_discard_prealloc udf_next_aext udf_current_aext udf_get_fileshortad OOPS the udf_discard_prealloc() path was examining uninitialized fields of the udf inode. udf_discard_prealloc() already has this code to short-circuit the discard path if no extents are preallocated: if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB || inode->i_size == UDF_I_LENEXTENTS(inode)) { return; } so if we initialize UDF_I_LENEXTENTS(inode) = 0 earlier in udf_new_inode, we won't try to free the (not) preallocated blocks, since this will match the i_size = 0 set when the inode was initialized. Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/udf/ialloc.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index 3873c672cb4..33323473e3c 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -75,6 +75,12 @@ struct inode * udf_new_inode (struct inode *dir, int mode, int * err)
}
*err = -ENOSPC;
+ UDF_I_UNIQUE(inode) = 0;
+ UDF_I_LENEXTENTS(inode) = 0;
+ UDF_I_NEXT_ALLOC_BLOCK(inode) = 0;
+ UDF_I_NEXT_ALLOC_GOAL(inode) = 0;
+ UDF_I_STRAT4096(inode) = 0;
+
block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum,
start, err);
if (*err)
@@ -84,11 +90,6 @@ struct inode * udf_new_inode (struct inode *dir, int mode, int * err)
}
mutex_lock(&sbi->s_alloc_mutex);
- UDF_I_UNIQUE(inode) = 0;
- UDF_I_LENEXTENTS(inode) = 0;
- UDF_I_NEXT_ALLOC_BLOCK(inode) = 0;
- UDF_I_NEXT_ALLOC_GOAL(inode) = 0;
- UDF_I_STRAT4096(inode) = 0;
if (UDF_SB_LVIDBH(sb))
{
struct logicalVolHeaderDesc *lvhd;