kernel panic: stack is corrupted in __schedule

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: c3d8f220 Merge tag 'kbuild-fixes-v5.9' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=147dd539900000
kernel config: https://syzkaller.appspot.com/x/.config?x=a0437fdd630bee11
dashboard link: https://syzkaller.appspot.com/bug?extid=509b1ddbb17d05016d2a
compiler: gcc (GCC) 10.1.0-syz 20200507
CC: [bse...@google.com dietmar....@arm.com juri....@redhat.com linux-...@vger.kernel.org mgo...@suse.de mi...@redhat.com pet...@infradead.org ros...@goodmis.org vincent...@linaro.org]

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+509b1d...@syzkaller.appspotmail.com

Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: __schedule+0x1d4b/0x21e0 kernel/sched/core.c:4534
CPU: 0 PID: 17256 Comm: syz-executor.1 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18f/0x20d lib/dump_stack.c:118
panic+0x2e3/0x75c kernel/panic.c:231
__stack_chk_fail+0x15/0x20 kernel/panic.c:686
__schedule+0x1d4b/0x21e0 kernel/sched/core.c:4534
Kernel Offset: disabled
Rebooting in 86400 seconds..


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.