5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Remington Brasga <rbrasga@xxxxxxx>
[ Upstream commit b0b2fc815e514221f01384f39fbfbff65d897e1c ]
Fix issue with UBSAN throwing shift-out-of-bounds warning.
Reported-by: syzbot+e38d703eeb410b17b473@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Remington Brasga <rbrasga@xxxxxxx>
Signed-off-by: Dave Kleikamp <dave.kleikamp@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/jfs/jfs_dmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index fe0b5a91356c4..ab90c7561e20c 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -3084,7 +3084,7 @@ static int dbFindBits(u32 word, int l2nb)
/* scan the word for nb free bits at nb alignments.
*/
- for (bitno = 0; mask != 0; bitno += nb, mask >>= nb) {
+ for (bitno = 0; mask != 0; bitno += nb, mask = (mask >> nb)) {
if ((mask & word) == mask)
break;
}
--
2.43.0
