On Wed, May 15, 2024 at 06:00:54PM +0100, Al Viro wrote: > On Wed, May 15, 2024 at 06:13:14PM +0200, David Sterba wrote: > > On Fri, Aug 28, 2020 at 06:18:17AM -0700, syzbot wrote: > > > Hello, > > > > > > syzbot found the following issue on: > > > > > > HEAD commit: d012a719 Linux 5.9-rc2 > > > git tree: upstream > > > console output: https://syzkaller.appspot.com/x/log.txt?x=15aa650e900000 > > > kernel config: https://syzkaller.appspot.com/x/.config?x=891ca5711a9f1650 > > > dashboard link: https://syzkaller.appspot.com/bug?extid=c92c93d1f1aaaacdb9db > > > compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12ecb939900000 > > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=140a19a9900000 > > > > > > The issue was bisected to: > > > > > > commit a9ed4a6560b8562b7e2e2bed9527e88001f7b682 > > > Author: Marc Zyngier <maz@xxxxxxxxxx> > > > Date: Wed Aug 19 16:12:17 2020 +0000 > > > > > > epoll: Keep a reference on files added to the check list > > > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16a50519900000 > > > final oops: https://syzkaller.appspot.com/x/report.txt?x=15a50519900000 > > > console output: https://syzkaller.appspot.com/x/log.txt?x=11a50519900000 > > > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > > Reported-by: syzbot+c92c93d1f1aaaacdb9db@xxxxxxxxxxxxxxxxxxxxxxxxx > > > Fixes: a9ed4a6560b8 ("epoll: Keep a reference on files added to the check list") > > > > > > ------------[ cut here ]------------ > > > kernel BUG at fs/inode.c:1668! > > > > #syz set subsystem: fs > > > > This has been among btrfs bugs but this is is 'fs' and probably with a > > fix but I was not able to identify it among all the changes in > > eventpoll.c > > It has nothing to do with btrfs, and there's a good chance it had been > fixed as a side effect of 319c15174757 "epoll: take epitem list out of struct file" > merge at 1a825a6a0e7e in 5.10 merge window; IOW, it should be in 5.11-rc1. Ok, thanks, let's use the commit 319c15174757 as the fix, #syz fix: epoll: take epitem list out of struct file
