From: Steven Rostedt <rostedt@goodmis.org>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: syzkaller <syzkaller@googlegroups.com>,
syzbot <syzbot+61e04e51b7ac86930589@syzkaller.appspotmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jens Axboe <axboe@kernel.dk>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
KVM list <kvm@vger.kernel.org>,
linux-block <linux-block@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
masahiroy@kernel.org, Ingo Molnar <mingo@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
rafael.j.wysocki@intel.com,
Sean Christopherson <seanjc@google.com>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
Thomas Gleixner <tglx@linutronix.de>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>, Will Deacon <will@kernel.org>,
"the arch/x86 maintainers" <x86@kernel.org>
Subject: Re: [syzbot] possible deadlock in del_gendisk
Date: Tue, 13 Apr 2021 14:43:35 -0400 [thread overview]
Message-ID: <20210413144335.4ff14cf2@gandalf.local.home> (raw)
In-Reply-To: <20210413144009.6ed2feb8@gandalf.local.home>
On Tue, 13 Apr 2021 14:40:09 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:
> ------------[ cut here ]------------
> raw_local_irq_restore() called with IRQs enabled
> WARNING: CPU: 0 PID: 8777 at kernel/locking/irqflag-debug.c:9 warn_bogus_irq_restore kernel/locking/irqflag-debug.c:9 [inline]
> WARNING: CPU: 0 PID: 8777 at kernel/locking/irqflag-debug.c:9 warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:7
In fact, when you have the above, which is a WARN() with text:
"raw_local_irq_restore() called with IRQs enabled"
It is pretty much guaranteed that all triggers of this bug will have the
above warning with the same text.
-- Steve
next prev parent reply other threads:[~2021-04-13 18:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 17:33 [syzbot] possible deadlock in del_gendisk syzbot
2021-04-13 17:41 ` Steven Rostedt
2021-04-13 17:43 ` Steven Rostedt
2021-04-13 18:24 ` Dmitry Vyukov
2021-04-13 18:40 ` Steven Rostedt
2021-04-13 18:43 ` Steven Rostedt [this message]
2021-04-16 7:51 ` Bisections with different bug manifestations Dmitry Vyukov
2021-04-16 13:13 ` Steven Rostedt
2021-04-16 13:26 ` Dmitry Vyukov
2021-04-16 13:48 ` Dmitry Vyukov
2021-06-07 10:56 ` [syzbot] possible deadlock in del_gendisk Tetsuo Handa
2021-06-09 16:31 ` Tetsuo Handa
2021-06-09 16:46 ` Tyler Hicks
2021-06-10 13:37 ` Tetsuo Handa
2021-06-11 6:46 ` Tetsuo Handa
2021-06-11 15:14 ` [PATCH] loop: drop loop_ctl_mutex around del_gendisk() in loop_remove() Tetsuo Handa
2021-06-15 5:30 ` Tetsuo Handa
2021-06-15 5:31 ` syzbot
2021-06-15 9:04 ` Jan Kara
2021-06-11 14:47 ` [syzbot] possible deadlock in del_gendisk Tetsuo Handa
2021-06-11 15:11 ` Pavel Tatashin
2021-06-11 15:18 ` Pavel Tatashin
2021-06-11 15:49 ` Tetsuo Handa
2021-06-12 2:35 ` Tetsuo Handa
2021-06-13 11:01 ` Tetsuo Handa
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