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

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commit 1bd8d6cd3e413d64e543ec3e69ff43e75a1cf1ea upstream.

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
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Darrick J. Wong 2017-08-24 13:22:06 -04:00 committed by syphyr
parent 2a9716cdad
commit a02265d4b0
1 changed files with 2 additions and 2 deletions
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4
fs/ext4/file.c
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@ -421,7 +421,7 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
mutex_lock(&inode->i_mutex);
isize = i_size_read(inode);
if (offset >= isize) {
if (offset < 0 || offset >= isize) {
mutex_unlock(&inode->i_mutex);
return -ENXIO;
}
@ -504,7 +504,7 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
mutex_lock(&inode->i_mutex);
isize = i_size_read(inode);
if (offset >= isize) {
if (offset < 0 || offset >= isize) {
mutex_unlock(&inode->i_mutex);
return -ENXIO;
}