This is a note to let you know that I've just added the patch titled ext4: in ext4_seek_{hole,data}, return -ENXIO for negative offsets to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ext4-in-ext4_seek_-hole-data-return-enxio-for-negative-offsets.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 1bd8d6cd3e413d64e543ec3e69ff43e75a1cf1ea Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx> Date: Thu, 24 Aug 2017 13:22:06 -0400 Subject: ext4: in ext4_seek_{hole,data}, return -ENXIO for negative offsets From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> 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@xxxxxxxxx> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/ext4/file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -595,7 +595,7 @@ static loff_t ext4_seek_data(struct file inode_lock(inode); isize = i_size_read(inode); - if (offset >= isize) { + if (offset < 0 || offset >= isize) { inode_unlock(inode); return -ENXIO; } @@ -658,7 +658,7 @@ static loff_t ext4_seek_hole(struct file inode_lock(inode); isize = i_size_read(inode); - if (offset >= isize) { + if (offset < 0 || offset >= isize) { inode_unlock(inode); return -ENXIO; } Patches currently in stable-queue which might be from darrick.wong@xxxxxxxxxx are queue-4.13/ext4-in-ext4_seek_-hole-data-return-enxio-for-negative-offsets.patch