watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.3.554:2507]
Modules linked in:
CPU: 1 PID: 2507 Comm: syz.3.554 Tainted: G        W         5.4.290-syzkaller-00002-g41adfeb3d639 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:kfree_skbmem+0x29/0x180 net/core/skbuff.c:631
Code: 00 41 57 41 56 41 54 53 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 07 b2 ea fd 49 8d 5f 7e 48 89 d8 48 c1 e8 03 42 0f b6 04 20 <84> c0 0f 85 09 01 00 00 0f b6 1b c1 eb 02 83 e3 03 48 89 df 48 c7
RSP: 0018:ffff8881f6f09940 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffff8881dfa4243e RCX: ffff8881eb9dcec0
RDX: 0000000000000103 RSI: 0000000000000103 RDI: ffff8881dfa423c0
RBP: ffff8881ec3b6000 R08: 0000000000000000 R09: ffffffff8460320c
R10: ffffffff84800000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881dfa423c0
FS:  00007fc0a125d6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc0a2bf3147 CR3: 00000001ecd17000 CR4: 00000000003406a0
DR0: 0000400000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 netlink_broadcast_filtered+0x115f/0x1280 net/netlink/af_netlink.c:1516
 netlink_broadcast net/netlink/af_netlink.c:1538 [inline]
 nlmsg_multicast include/net/netlink.h:968 [inline]
 nlmsg_notify+0xf7/0x1b0 net/netlink/af_netlink.c:2510
 __br_mdb_notify+0x8f8/0xc60 net/bridge/br_mdb.c:434
 br_mdb_notify+0x203/0x360 net/bridge/br_mdb.c:457
 br_multicast_del_pg+0x25f/0x3c0 net/bridge/br_multicast.c:186
 br_multicast_port_group_expired+0x14c/0x170 net/bridge/br_multicast.c:210
 call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x879/0xbe0 kernel/time/timer.c:1817
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x45/0x60 kernel/locking/spinlock.c:199
Code: 08 00 74 0c 48 c7 c7 90 3c eb 85 e8 05 02 3d fd 48 83 3d 5d 09 94 01 00 74 29 48 89 df e8 53 d4 f4 fc 66 90 fb bf 01 00 00 00 <e8> 86 be ed fc 65 8b 05 3b 5a ab 7b 85 c0 74 02 5b c3 e8 c4 20 a9
RSP: 0018:ffff8881e7076f50 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881f6f57b40 RCX: dffffc0000000000
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff8881e7076fb0 R08: ffffffff8179a5d9 R09: fffffbfff0c98a8b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f6f57b40
R13: ffff8881eb9dcec0 R14: dffffc0000000000 R15: 0000000000000000
 finish_lock_switch kernel/sched/core.c:3347 [inline]
 finish_task_switch+0x130/0x590 kernel/sched/core.c:3447
 context_switch kernel/sched/core.c:3611 [inline]
 __schedule+0xb0d/0x1320 kernel/sched/core.c:4307
 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:4456
 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:4481
 ___preempt_schedule+0x16/0x20 arch/x86/entry/thunk_64.S:50
 unwind_next_frame+0x19c2/0x1ea0 arch/x86/kernel/unwind_orc.c:603
 arch_stack_walk+0x111/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1c0 kernel/stacktrace.c:123
 save_stack+0x95/0x880 mm/page_owner.c:122
 __reset_page_owner+0x1f/0x100 mm/page_owner.c:149
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 free_pcp_prepare mm/page_alloc.c:1233 [inline]
 free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085
 free_unref_page mm/page_alloc.c:3134 [inline]
 free_the_page mm/page_alloc.c:4953 [inline]
 __free_pages+0xaf/0x140 mm/page_alloc.c:4961
 __vunmap+0x75b/0x890 mm/vmalloc.c:2260
 kcov_put kernel/kcov.c:396 [inline]
 kcov_close+0x27/0x50 kernel/kcov.c:495
 __fput+0x262/0x680 fs/file_table.c:281
 task_work_run+0x140/0x170 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xcaf/0x2bc0 kernel/exit.c:861
 do_group_exit+0x138/0x300 kernel/exit.c:984
 get_signal+0xdb1/0x1440 kernel/signal.c:2738
 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
 ret_from_intr+0x1c/0x1c
RIP: 0033:0x7fc0a2bf3171
Code: Bad RIP value.
RSP: 002b:00007fc0a125d038 EFLAGS: 00000203 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000008 RBX: 00007fc0a2e0bfa0 RCX: 00007fc0a2bf3169
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000400000000000
RBP: 00007fc0a2c742a0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc0a2e0bfa0 R15: 00007fffd3acea68
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
NMI backtrace for cpu 0 skipped: idling at default_idle+0x1f/0x30 arch/x86/kernel/process.c:572