watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:15459] Modules linked in: irq event stamp: 16594009 hardirqs last enabled at (16594008): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (16594009): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (16568182): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (16568185): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 15459 Comm: syz-executor.3 Not tainted 6.1.0-rc6-next-20221125 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_raw_spin_unlock_irqrestore+0x32/0x60 Code: 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 36 30 eb fc 48 89 ef e8 fe a7 eb fc 80 e7 02 74 06 e8 a4 3e 0f fd fb bf 01 00 00 00 39 04 e1 fc 65 8b 05 aa af c2 7b 85 c0 74 07 5b 5d e9 5b 29 00 RSP: 0018:ffff88806ce09ac8 EFLAGS: 00000212 RAX: 0000000000fd3440 RBX: 0000000000000246 RCX: ffffffff812b6b6f RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000001 RBP: ffffffff856d00e0 R08: 0000000000000001 R09: ffffffff87627847 R10: fffffbfff0ec4f08 R11: 0000000000000001 R12: 0000000000082820 R13: 0000000000000200 R14: 0000000000000200 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7c85f97718 CR3: 000000003407a000 CR4: 0000000000350ef0 Call Trace: __kmem_cache_alloc_node+0x257/0x400 __kmalloc_node_track_caller+0x43/0xb0 __alloc_skb+0xe9/0x310 __netdev_alloc_skb+0x76/0x3e0 __ieee80211_beacon_get+0x3de/0x1380 ieee80211_beacon_get_tim+0x99/0x4f0 mac80211_hwsim_beacon_tx+0x1d2/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xba0 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x8f9 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:lock_acquire+0x1df/0x530 Code: 03 b8 ff ff ff ff 65 0f c1 05 d5 74 d6 7e 83 f8 01 0f 85 c8 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffff8880482ef588 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff1100905deb3 RCX: 00000000eb241a10 RDX: 1ffff11007e78b33 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff87627847 R10: fffffbfff0ec4f08 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff85607c00 R15: 0000000000000000 folio_memcg_lock+0x3e/0x4a0 page_remove_rmap+0x57/0x620 unmap_page_range+0x1fdf/0x2c10 unmap_single_vma+0x190/0x2a0 unmap_vmas+0x226/0x380 exit_mmap+0x158/0x680 mmput+0xd5/0x390 do_exit+0x99b/0x2720 do_group_exit+0xd4/0x2a0 get_signal+0x21a5/0x22e0 arch_do_signal_or_restart+0x79/0x5a0 exit_to_user_mode_prepare+0x131/0x1a0 syscall_exit_to_user_mode+0x1d/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fe1e9421c27 Code: Unable to access opcode bytes at 0x7fe1e9421bfd. RSP: 002b:00007fe1e6997fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe1e9421c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007fe1e6998040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000100 R14: 00007fe1e6998000 R15: 0000000000000000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess): 0: 48 83 c7 18 add $0x18,%rdi 4: 53 push %rbx 5: 48 89 f3 mov %rsi,%rbx 8: 48 8b 74 24 10 mov 0x10(%rsp),%rsi d: e8 36 30 eb fc callq 0xfceb3048 12: 48 89 ef mov %rbp,%rdi 15: e8 fe a7 eb fc callq 0xfceba818 1a: 80 e7 02 and $0x2,%bh 1d: 74 06 je 0x25 1f: e8 a4 3e 0f fd callq 0xfd0f3ec8 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 39 04 e1 fc callq 0xfce10468 <-- trapping instruction 2f: 65 8b 05 aa af c2 7b mov %gs:0x7bc2afaa(%rip),%eax # 0x7bc2afe0 36: 85 c0 test %eax,%eax 38: 74 07 je 0x41 3a: 5b pop %rbx 3b: 5d pop %rbp 3c: e9 .byte 0xe9 3d: 5b pop %rbx 3e: 29 00 sub %eax,(%rax)