From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: peterz@infradead.org, mingo@redhat.com
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [BUG] kernel: locking: a possible sleep-in-atomic-context bug in rt_mutex_slowlock()
Date: Thu, 21 Jun 2018 11:14:49 +0800 [thread overview]
Message-ID: <10fdf749-b47c-587c-96cb-9a877d8760ac@gmail.com> (raw)
The kernel may sleep with holding a spinlock.
The function call path (from bottom to top) in Linux-4.16.7 is:
[FUNC] schedule
kernel/locking/rtmutex.c, 1223: schedule in rt_mutex_handle_deadlock
kernel/locking/rtmutex.c, 1273: rt_mutex_handle_deadlock in
rt_mutex_slowlock
kernel/locking/rtmutex.c, 1249: _raw_spin_lock_irqsave in rt_mutex_slowlock
This bug is found by my static analysis tool (DSAC-2) and checked by my
code review.
I do not know how to correctly fix this bug, so I just report them.
Best wishes,
Jia-Ju Bai
next reply other threads:[~2018-06-21 3:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-21 3:14 Jia-Ju Bai [this message]
2018-06-21 7:36 ` Peter Zijlstra
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