kernel panic: corrupted stack end in sys_select

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: c457d967 Add linux-next specific files for 20210422
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15372bc5d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b6eba6608424416
dashboard link: https://syzkaller.appspot.com/bug?extid=dbf34bba497baf62541e
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+dbf34b...@syzkaller.appspotmail.com

Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 0 PID: 8462 Comm: sshd Not tainted 5.12.0-rc8-next-20210422-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x141/0x1d7 lib/dump_stack.c:120
panic+0x306/0x73d kernel/panic.c:231
schedule_debug kernel/sched/core.c:4828 [inline]
__schedule+0x23ac/0x23c0 kernel/sched/core.c:4973
schedule+0xcf/0x270 kernel/sched/core.c:5158
schedule_hrtimeout_range_clock+0x195/0x370 kernel/time/hrtimer.c:2157
poll_schedule_timeout.constprop.0+0x107/0x1e0 fs/select.c:243
do_select+0x1182/0x16a0 fs/select.c:603
core_sys_select+0x3c2/0x9c0 fs/select.c:677
kern_select+0x13d/0x1c0 fs/select.c:718
__do_sys_select fs/select.c:725 [inline]
__se_sys_select fs/select.c:722 [inline]
__x64_sys_select+0xba/0x150 fs/select.c:722
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fc79acf15e3
Code: 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 29 d1 2b 00 00 75 13 49 89 ca b8 17 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b 3f 01 00 48 89 04 24
RSP: 002b:00007ffdba4df918 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
RAX: ffffffffffffffda RBX: 000056389dc9e110 RCX: 00007fc79acf15e3
RDX: 000056389dc9e130 RSI: 000056389dc9e110 RDI: 000000000000000b
RBP: 000056389ccc0a88 R08: 00007ffdba4df9a0 R09: 0000000000000100
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdba4df97f R14: 000056389ca7bbe7 R15: 0000000000000003
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.