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Message-ID: <dc939a9c-80ef-ef8f-4e02-a46dbb736e89@I-love.SAKURA.ne.jp> Date: Sat, 14 Apr 2018 16:02:24 +0900 From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp> To: syzbot <syzbot+8e4a81166025b5b7fa66@...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 shrink_dcache_parent 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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