On Wed, Dec 20, 2023 at 2:30 AM syzbot <syzbot+da4f9f61f96525c62cc7@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > syzbot has bisected this issue to: > > commit 1e8c813b083c4122dfeaa5c3b11028331026e85d > Author: Christoph Hellwig <hch@xxxxxx> > Date: Wed May 31 12:55:32 2023 +0000 > > PM: hibernate: don't use early_lookup_bdev in resume_store > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14b15592e80000 > start commit: 2cf4f94d8e86 Merge tag 'scsi-fixes' of git://git.kernel.or.. > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=16b15592e80000 > console output: https://syzkaller.appspot.com/x/log.txt?x=12b15592e80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=e5751b3a2226135d > dashboard link: https://syzkaller.appspot.com/bug?extid=da4f9f61f96525c62cc7 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=176a4f49e80000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=154aa8d6e80000 > > Reported-by: syzbot+da4f9f61f96525c62cc7@xxxxxxxxxxxxxxxxxxxxxxxxx > Fixes: 1e8c813b083c ("PM: hibernate: don't use early_lookup_bdev in resume_store") > I'm not sure this bisection is reliable, so I wouldn't use this Fixes tag. The reproducer may be a little flakey. Anyway, this is just one of many problems, real or false positives, related to the unholy dependency which sendfile() creates between locks on two different filesystems. I think those changes that are queued for 6.8 are going so fix this class of problems: #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.rw Thanks, Amir.
