Re: [syzbot] possible deadlock in del_gendisk
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2021-04-13 18:43:42
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kvm, lkml
On Tue, 13 Apr 2021 14:40:09 -0400 Steven Rostedt [off-list ref] 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