Hello,
syzbot found the following crash on:
HEAD commit: 7b75e49d net: dsa: mv88e6xxx: wait after reset deactivation
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=10f51b13a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=e7c31a94f66cc0aa
dashboard link: https://syzkaller.appspot.com/bug?extid=d88a977731a9888db7ba
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130f49bda00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d88a977731a9888db7ba@xxxxxxxxxxxxxxxxxxxxxxxxx
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 1 PID: 8936 Comm: syz-executor.3 Not tainted 5.2.0-rc6+ #69
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+0x172/0x1f0 lib/dump_stack.c:113
panic+0x2cb/0x744 kernel/panic.c:219
schedule_debug kernel/sched/core.c:3272 [inline]
__schedule+0x155d/0x1560 kernel/sched/core.c:3381
preempt_schedule_notrace kernel/sched/core.c:3664 [inline]
preempt_schedule_notrace+0xa0/0x130 kernel/sched/core.c:3635
___preempt_schedule_notrace+0x16/0x2f
rcu_is_watching+0x23/0x30 kernel/rcu/tree.c:873
rcu_read_lock include/linux/rcupdate.h:594 [inline]
dput+0x41e/0x690 fs/dcache.c:845
__fput+0x424/0x890 fs/file_table.c:293
____fput+0x16/0x20 fs/file_table.c:313
task_work_run+0x145/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:185 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:168
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413201
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48
83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48
89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffcee6f8e20 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000413201
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff
R10: 00007ffcee6f8f00 R11: 0000000000000293 R12: 000000000075c9a0
R13: 000000000075c9a0 R14: 00000000000127ed R15: ffffffffffffffff
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
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