syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor.1:8350]
Modules linked in:
irq event stamp: 10992057
hardirqs last  enabled at (10992056): [<ffffffff81006743>] trace_hardirqs_on_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:41
hardirqs last disabled at (10992057): [<ffffffff8100675f>] trace_hardirqs_off_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:42
softirqs last  enabled at (5653286): [<ffffffff87e006cd>] __do_softirq+0x6cd/0x98c kernel/softirq.c:319
softirqs last disabled at (5663595): [<ffffffff81474a2b>] invoke_softirq kernel/softirq.c:373 [inline]
softirqs last disabled at (5663595): [<ffffffff81474a2b>] irq_exit+0x19b/0x1e0 kernel/softirq.c:413
CPU: 1 PID: 8350 Comm: syz-executor.1 Not tainted 5.4.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
RIP: 0010:stack_trace_consume_entry+0xb8/0x190 kernel/stacktrace.c:89
Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b1 00 00 00 44 8b 73 0c <31> ff 44 89 f6 e8 0e 2d 11 00 45 85 f6 75 75 e8 84 2b 11 00 48 89
RSP: 0018:ffff88802d309520 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: ffff88802d309610 RCX: ffffffff8163b248
RDX: 0000000000000000 RSI: ffffffff8163b256 RDI: ffff88802d30961c
RBP: ffff88802d309548 R08: ffff8880116b4300 R09: ffff88802d3095b0
R10: ffff88802d309580 R11: ffff88802d309590 R12: 000000000000000b
R13: ffffffff8164ce83 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fdbc7a70700(0000) GS:ffff88802d300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001ffaa78 CR3: 000000002b5d3000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 arch_stack_walk+0x71/0xf0 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123
 save_stack+0x23/0x90 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:510 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:483
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524
 kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3550
 kmalloc include/linux/slab.h:556 [inline]
 switchdev_deferred_enqueue.constprop.0+0x4e/0x250 net/switchdev/switchdev.c:87
 switchdev_port_obj_del_defer net/switchdev/switchdev.c:352 [inline]
 switchdev_port_obj_del+0x109/0x190 net/switchdev/switchdev.c:370
 br_mdb_switchdev_host_port net/bridge/br_mdb.c:367 [inline]
 br_mdb_switchdev_host net/bridge/br_mdb.c:379 [inline]
 __br_mdb_notify+0xa6e/0xe50 net/bridge/br_mdb.c:422
 br_mdb_notify+0x22e/0x2f0 net/bridge/br_mdb.c:457
 br_multicast_host_leave.part.0+0x68/0x90 net/bridge/br_multicast.c:532
 br_multicast_host_leave net/bridge/br_multicast.c:531 [inline]
 br_multicast_group_expired+0x1fd/0x410 net/bridge/br_multicast.c:151
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4f/0x80 kernel/locking/spinlock.c:199
Code: c0 68 34 53 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 12 2a 99 01 00 74 20 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 e7 6b 96 f9 65 8b 05 18 14 48 78 85 c0 74 06 41
RSP: 0018:ffff88800bff78d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff12a668d RBX: ffff8880116b4300 RCX: 0000000000000006
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff8880116b4b94
RBP: ffff88800bff78e0 R08: 1ffffffff15d29b8 R09: fffffbfff15d29b9
R10: fffffbfff15d29b8 R11: ffffffff8ae94dc7 R12: ffff88802d337380
R13: ffff88802c4b8380 R14: ffff88801727b840 R15: 0000000000000000
 finish_lock_switch kernel/sched/core.c:3124 [inline]
 finish_task_switch+0x147/0x750 kernel/sched/core.c:3224
 context_switch kernel/sched/core.c:3388 [inline]
 __schedule+0x8e9/0x1f30 kernel/sched/core.c:4081
 preempt_schedule_common+0x4f/0xe0 kernel/sched/core.c:4236
 preempt_schedule+0x4b/0x60 kernel/sched/core.c:4261
 ___preempt_schedule+0x16/0x18 arch/x86/entry/thunk_64.S:50
 smp_call_function_single+0x410/0x480 kernel/smp.c:313
 task_function_call+0xe9/0x180 kernel/events/core.c:114
 perf_install_in_context+0x308/0x5a0 kernel/events/core.c:2746
 __do_sys_perf_event_open+0x1cbc/0x2c70 kernel/events/core.c:11543
 __se_sys_perf_event_open kernel/events/core.c:11151 [inline]
 __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:11151
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a759
Code: bd b1 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 8b b1 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdbc7a6fc88 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 000000000071bfa8 RCX: 000000000045a759
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002001d000
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fdbc7a706d4
R13: 00000000004aec2b R14: 00000000006f1ca8 R15: 00000000ffffffff
Sending NMI from CPU 1 to CPUs 0,2-3:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60
NMI backtrace for cpu 2 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60
NMI backtrace for cpu 3 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60