diff options
| author | Dmitriy Monakhov <dmonakhov@sw.ru> | 2007-05-08 03:24:34 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 14:14:59 -0400 |
| commit | 82f703bb8cb2732b4437a9f555a1be564e9e71c2 (patch) | |
| tree | 14b96636cc447ff00a5c3da0aa8d114f982b6cea /fs/freevxfs/vxfs_bmap.c | |
| parent | 1368c4f2482c9e06bcb297217433818b171cc9e3 (diff) | |
freevxfs: possible null pointer dereference fix
sb_read may return NULL, so let's explicitly check it.
Signed-off-by: Dmitriy Monakhov <dmonakhov@openvz.org>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/freevxfs/vxfs_bmap.c')
| -rw-r--r-- | fs/freevxfs/vxfs_bmap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/freevxfs/vxfs_bmap.c b/fs/freevxfs/vxfs_bmap.c index 2d71128bd8d6..f86fd3cacd5a 100644 --- a/fs/freevxfs/vxfs_bmap.c +++ b/fs/freevxfs/vxfs_bmap.c | |||
| @@ -137,7 +137,7 @@ vxfs_bmap_indir(struct inode *ip, long indir, int size, long block) | |||
| 137 | 137 | ||
| 138 | bp = sb_bread(ip->i_sb, | 138 | bp = sb_bread(ip->i_sb, |
| 139 | indir + (i / VXFS_TYPED_PER_BLOCK(ip->i_sb))); | 139 | indir + (i / VXFS_TYPED_PER_BLOCK(ip->i_sb))); |
| 140 | if (!buffer_mapped(bp)) | 140 | if (!bp || !buffer_mapped(bp)) |
| 141 | return 0; | 141 | return 0; |
| 142 | 142 | ||
| 143 | typ = ((struct vxfs_typed *)bp->b_data) + | 143 | typ = ((struct vxfs_typed *)bp->b_data) + |