kernel panic: corrupted stack end in sys_nanosleep

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 5714ee50 copy_xstate_to_kernel: Fix typo which caused GDB ..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1037a873100000
kernel config: https://syzkaller.appspot.com/x/.config?x=f87a5e4232fdb267
dashboard link: https://syzkaller.appspot.com/bug?extid=5ab48e3c61e6bd00478a
compiler: gcc (GCC) 10.1.0-syz 20200507
CC: [linux-...@vger.kernel.org tg...@linutronix.de]

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+5ab48e...@syzkaller.appspotmail.com

Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 1 PID: 16415 Comm: syz-executor.0 Not tainted 5.8.0-rc6-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
schedule_debug kernel/sched/core.c:3969 [inline]
__schedule+0x2245/0x2250 kernel/sched/core.c:4114
schedule+0xd0/0x2a0 kernel/sched/core.c:4290
freezable_schedule include/linux/freezer.h:172 [inline]
do_nanosleep+0x222/0x650 kernel/time/hrtimer.c:1879
hrtimer_nanosleep+0x1f6/0x430 kernel/time/hrtimer.c:1932
__do_sys_nanosleep kernel/time/hrtimer.c:1966 [inline]
__se_sys_nanosleep kernel/time/hrtimer.c:1953 [inline]
__x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1953
do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45a701
Code: Bad RIP value.
RSP: 002b:00007ffcf191b2d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 000000000006cf55 RCX: 000000000045a701
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffcf191b2e0
RBP: 0000000000000001 R08: 00000000b93c7f23 R09: 00000000b93c7f27
R10: 00007ffcf191b3e0 R11: 0000000000000293 R12: 000000000078bf00
R13: 000000000078c900 R14: ffffffffffffffff R15: 000000000078bfac
Kernel Offset: disabled


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[syzbot]

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