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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-09-08 10:59:43 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-09-09 14:46:36 -0700 |
| commit | 0b4c5afde9b57c08b55d26725d228d5314cfc57a (patch) | |
| tree | f034d99b62dd117b135c82061cf1f64d2d0b68ae /fs/f2fs | |
| parent | 9a01b56b1a79e210e9d2d67c9b18906d31d536c4 (diff) | |
| download | linux-0b4c5afde9b57c08b55d26725d228d5314cfc57a.tar.bz2 | |
f2fs: fix negative value for lseek offset
If application throws negative value of lseek with SEEK_DATA|SEEK_HOLE,
previous f2fs went into BUG_ON in get_dnode_of_data, which was reported
by Tommi Rantala.
He could make a simple code to detect this having:
lseek(fd, -17595150933902LL, SEEK_DATA);
This patch should resolve that bug.
Reported-by: Tommi Rentala <tt.rantala@gmail.com>
[Jaegeuk Kim: relocate the condition as suggested by Chao]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/file.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 9f0ea3d3251b..5cde363cf7a8 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -353,6 +353,8 @@ static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) maxbytes, i_size_read(inode)); case SEEK_DATA: case SEEK_HOLE: + if (offset < 0) + return -ENXIO; return f2fs_seek_block(file, offset, whence); } |