Files
linux-stable-mirror/fs/jfs
Liu Shixin via Jfs-discussion ea30508b7b fs/jfs: fix shift exponent db_agl2size negative
[ Upstream commit fad376fce0 ]

As a shift exponent, db_agl2size can not be less than 0. Add the missing
check to fix the shift-out-of-bounds bug reported by syzkaller:

 UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:2227:15
 shift exponent -744642816 is negative

Reported-by: syzbot+0be96567042453c0c820@syzkaller.appspotmail.com
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-03-11 13:57:22 +01:00
..
2022-04-13 20:59:13 +02:00
2022-12-31 13:14:40 +01:00