On Tue, Feb 11, 2025 at 09:14:12PM -0500, Waiman Long wrote: > On 2/9/25 3:43 PM, syzbot wrote: > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 92514ef226f5 Merge tag 'for-6.14-rc1-tag' of git://git.ker.. > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=179453df980000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=1909f2f0d8e641ce > > dashboard link: https://syzkaller.appspot.com/bug?extid=ed801a886dfdbfe7136d > > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > > > Unfortunately, I don't have any reproducer for this issue yet. > > > > Downloadable assets: > > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-92514ef2.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/c4d8b91f8769/vmlinux-92514ef2.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/c24ec4365966/bzImage-92514ef2.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+ed801a886dfdbfe7136d@xxxxxxxxxxxxxxxxxxxxxxxxx > > This problem should be fixed by the following upstream patch once it is > merged into mainline. > > https://lore.kernel.org/lkml/20250127013127.3913153-1-longman@xxxxxxxxxx/ > AFAICT all these lockdep reports are because of an earlier warning. Fix warning, report goes away. Notably: > > _printk+0xd5/0x120 kernel/printk/printk.c:2457 > > __report_bug lib/bug.c:195 [inline] > > report_bug+0x346/0x500 lib/bug.c:219 > > handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285 > > exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309 > > asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621 > > expire_timers kernel/time/timer.c:1827 [inline] IOW I think we're focusing on the wrong thing here. > Peter, are you planning to merge this patch? This is another instance where > the old way of calling wake_up_process() inside the lock critical region can > lead to deadlock. I still don't love the Changelog, but yeah, I suppose I can pick it up. But I see Boqun took it and I'll get it eventually. No real hurry there I suppose.
