From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: jaegeuk@kernel.org, yuchao0@huawei.com
Cc: linux-f2fs-devel@lists.sourceforge.net,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [BUG] fs/f2fs: a possible sleep-in-atomic bug in f2fs_trace_pid
Date: Tue, 12 Dec 2017 08:59:29 +0800 [thread overview]
Message-ID: <8e7328d3-2df3-e79d-9558-a9b3713751c4@gmail.com> (raw)
According to fs/f2fs/trace.c, the kernel module may sleep under a spinlock.
The function call path is:
f2fs_trace_pid (acquire the spinlock)
f2fs_radix_tree_insert
cond_resched --> may sleep
I do not find a good way to fix it, so I only report.
This possible bug is found by my static analysis tool (DSAC) and my code
review.
Thanks,
Jia-Ju Bai
next reply other threads:[~2017-12-12 0:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-12 0:59 Jia-Ju Bai [this message]
2017-12-12 2:00 ` [BUG] fs/f2fs: a possible sleep-in-atomic bug in f2fs_trace_pid Chao Yu
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