4.19-stable review patch. If anyone has any objections, please let me know.
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From: Remington Brasga rbrasga@uci.edu
[ Upstream commit b0b2fc815e514221f01384f39fbfbff65d897e1c ]
Fix issue with UBSAN throwing shift-out-of-bounds warning.
Reported-by: syzbot+e38d703eeb410b17b473@syzkaller.appspotmail.com Signed-off-by: Remington Brasga rbrasga@uci.edu Signed-off-by: Dave Kleikamp dave.kleikamp@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 1128bcdf5024a..9f731847ae634 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -3097,7 +3097,7 @@ 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; }