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Date: Sat, 14 Apr 2018 16:02:20 +0900
From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To: syzbot <syzbot+da69f0eccf07cdcf6710@...kaller.appspotmail.com>,
viro@...iv.linux.org.uk
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com
Subject: Re: INFO: rcu detected stall in vfs_rmdir
Infinite loop inside shrink_dcache_parent() due to lack of cond_resched().
I can reproduce this issue by running the reproducer on one CPU (using "taskset -c 0").
Reverting commit 32785c0539b7e96f ("fs/dcache.c: add cond_resched() in shrink_dentry_list()")
solves this issue.
#syz dup: INFO: rcu detected stall in d_walk
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