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Date: Sat, 7 Oct 2017 09:59:41 +0800 From: Jia-Ju Bai <baijiaju1990@....com> To: ccaulfie@...hat.com, teigland@...hat.com, viro@...iv.linux.org.uk Cc: cluster-devel@...hat.com, linux-kernel@...r.kernel.org Subject: [BUG] fs/dlm: A possible sleep-in-atomic bug in dlm_master_lookup According to fs/dlm/lock.c, the kernel may sleep under a spinlock, and the function call path is: dlm_master_lookup (acquire the spinlock) dlm_send_rcom_lookup_dump create_rcom dlm_lowcomms_get_buffer nodeid2con mutex_lock --> may sleep This bug is found by my static analysis tool and my code review. Thanks, Jia-Ju Bai
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