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ext4: in ext4_seek_{hole,data}, return -ENXIO for negative offsets 

In the ext4 implementations of SEEK_HOLE and SEEK_DATA, make sure we
return -ENXIO for negative offsets instead of banging around inside
the extent code and returning -EFSCORRUPTED.

Reported-by: Mateusz S <muttdini@gmail.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org # 4.6
This commit is contained in:
Darrick J. Wong 2017-08-24 13:22:06 -04:00 committed by Theodore Ts'o
parent 901ed070df
commit 1bd8d6cd3e
1 changed files with 2 additions and 2 deletions
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4
fs/ext4/file.c
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@ -595,7 +595,7 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
inode_lock(inode); inode_lock(inode);
isize = i_size_read(inode); isize = i_size_read(inode);
if (offset >= isize) { if (offset < 0 || offset >= isize) {
inode_unlock(inode); inode_unlock(inode);
return -ENXIO; return -ENXIO;
} }
@ -658,7 +658,7 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
inode_lock(inode); inode_lock(inode);
isize = i_size_read(inode); isize = i_size_read(inode);
if (offset >= isize) { if (offset < 0 || offset >= isize) {
inode_unlock(inode); inode_unlock(inode);
return -ENXIO; return -ENXIO;
} }