From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: trond.myklebust@hammerspace.com, anna.schumaker@netapp.com
Cc: linux-nfs@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [BUG] fs: nfs: pnfs_nfs: a possible sleep-in-atomic-context bug in pnfs_generic_recover_commit_reqs()
Date: Mon, 13 Aug 2018 11:46:28 +0800 [thread overview]
Message-ID: <6e0b1c99-bfe5-29a9-51b1-1c71fe0b91b4@gmail.com> (raw)
The kernel may sleep with holding a spinlock.
The function call paths (from bottom to top) in Linux-4.16 are:
[FUNC] mutex_lock_nested
fs/nfs/write.c, 1045: mutex_lock_nested in nfs_scan_commit_list
fs/nfs/pnfs_nfs.c, 145: nfs_scan_commit_list in
pnfs_generic_recover_commit_reqs
fs/nfs/pnfs_nfs.c, 154: spin_lock in pnfs_generic_recover_commit_reqs
I do not find a good way to fix, so I only report.
This is found by my static analysis tool (DSAC).
Thanks,
Jia-Ju Bai
reply other threads:[~2018-08-13 6:26 UTC|newest]
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