Re: [syzbot] [jfs?] UBSAN: shift-out-of-bounds in dbMount

From: syzbot
Date: Fri Mar 17 2023 - 22:27:27 EST


syzbot suspects this issue was fixed by commit:

commit fad376fce0af58deebc5075b8539dc05bf639af3
Author: Liu Shixin via Jfs-discussion <jfs-discussion@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu Nov 3 03:01:59 2022 +0000

fs/jfs: fix shift exponent db_agl2size negative

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10f3046ec80000
start commit: 513c1a3d3f19 Merge tag 'trace-v6.2-rc6' of git://git.kerne..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=6bb1911ff9919df0
dashboard link: https://syzkaller.appspot.com/bug?extid=0835e526215d5dcefaa9
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d599df480000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16bb69a7480000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: fs/jfs: fix shift exponent db_agl2size negative

For information about bisection process see: https://goo.gl/tpsmEJ#bisection