INFO: task hung in __schedule

[syzbot]

Hello,

syzkaller hit the following crash on
fd6d2e506ce6f850d45342a15c896591291b77b5
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.

Unfortunately, I don't have any reproducer for this bug yet.
CC: [linux-...@vger.kernel.org mi...@redhat.com pet...@infradead.org]

INFO: task syz-executor1:9810 blocked for more than 120 seconds.
Not tainted 4.15.0-rc2+ #208
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1 D23952 9810 4552 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
? tpacket_write_wait: Connection to 216.239.38.127 port 9600: Broken pipe


---
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[Dmitry Vyukov]

corrupted report

#syz invalid

On Sun, Dec 10, 2017 at 1:26 PM, syzbot
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