On Thu, Mar 30, 2023 at 9:45 PM syzbot <syzbot+7edb85bc97be9f350d90@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > 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=146d74a5c80000 > start commit: b229b6ca5abb Merge tag 'perf-tools-fixes-for-v6.1-2022-10-.. > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=a66c6c673fb555e8 > dashboard link: https://syzkaller.appspot.com/bug?extid=7edb85bc97be9f350d90 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d5817a880000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15d68cde880000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: fs/jfs: fix shift exponent db_agl2size negative It might well be possible. The patch improves the validation of db_agl2size parameter, which affects the execution some frames up in the crash stack trace: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/jfs/jfs_dmap.c?id=6d36c728bc2e2d632f4b0dea00df5532e20dfdab#n729 #syz fix: fs/jfs: fix shift exponent db_agl2size negative > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection >
