watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.4:5758] Modules linked in: irq event stamp: 5069327 hardirqs last enabled at (5069326): [] asm_sysvec_apic_timer_interrupt+0x1b/0x20 hardirqs last disabled at (5069327): [] sysvec_apic_timer_interrupt+0xb/0xc0 softirqs last enabled at (5004230): [] __irq_exit_rcu+0x113/0x170 softirqs last disabled at (5004233): [] __irq_exit_rcu+0x113/0x170 CPU: 0 PID: 5758 Comm: syz-executor.4 Not tainted 5.19.0-rc5-next-20220705 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:preempt_count_sub+0x25/0x150 Code: e9 3c fe ff ff 48 c7 c0 c0 b6 de 86 53 89 fb 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 <38> d0 7c 08 84 d2 0f 85 e4 00 00 00 8b 0d 89 24 bf 05 85 c9 75 1b RSP: 0018:ffff88806ce09668 EFLAGS: 00000206 RAX: 0000000000000003 RBX: 0000000000000001 RCX: 1ffffffff0dbd6d8 RDX: 0000000000000004 RSI: ffff88806ce09cd8 RDI: 0000000000000001 RBP: ffff88806ce02000 R08: ffffffff85fe1912 R09: ffffffff85fe1916 R10: ffffed100d9c12ec R11: ffff88806ce09738 R12: ffff88806ce09739 R13: ffff88806ce09758 R14: ffff88806ce096f8 R15: 0000000000000007 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560949186090 CR3: 0000000018b58000 CR4: 0000000000350ef0 Call Trace: unwind_next_frame+0xdfe/0x20a0 arch_stack_walk+0x83/0xf0 stack_trace_save+0x8c/0xc0 kasan_save_stack+0x1e/0x40 __kasan_slab_alloc+0x66/0x80 kmem_cache_alloc+0x1b1/0x490 __create_object.isra.0+0x3d/0xc10 __kmalloc_node_track_caller+0x278/0x470 __alloc_skb+0xdd/0x340 __netdev_alloc_skb+0x72/0x3e0 __ieee80211_beacon_get+0x387/0x12d0 ieee80211_beacon_get_tim+0x95/0x4e0 mac80211_hwsim_beacon_tx+0x1a7/0xa10 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x70/0x180 mac80211_hwsim_beacon+0xfd/0x200 __hrtimer_run_queues+0x5de/0xbc0 hrtimer_run_softirq+0x172/0x340 __do_softirq+0x1c8/0x8cc __irq_exit_rcu+0x113/0x170 irq_exit_rcu+0x5/0x20 sysvec_apic_timer_interrupt+0x8e/0xc0 asm_sysvec_apic_timer_interrupt+0x1b/0x20 RIP: 0010:__rcu_read_unlock+0xc4/0x510 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 93 01 00 00 8b 85 f8 03 00 00 85 c0 75 54 <65> 48 8b 1c 25 c0 6e 02 00 48 8d bb f4 03 00 00 48 b8 00 00 00 00 RSP: 0018:ffff88803d5b75f0 EFLAGS: 00000206 RAX: 0000000000128ddb RBX: ffff888016f11ac0 RCX: ffffffff8128d13f RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff86a5e7d7 R10: fffffbfff0d4bcfa R11: 0000000000000001 R12: ffff88806ce38a80 R13: ffff88800e18e800 R14: 0000000000000200 R15: dffffc0000000000 folio_memcg_unlock+0xd6/0x1d0 page_remove_rmap+0xfa/0x490 unmap_page_range+0xe8f/0x2720 unmap_single_vma+0x190/0x350 unmap_vmas+0x21e/0x370 exit_mmap+0x154/0x680 mmput+0xd1/0x390 do_exit+0xa01/0x27d0 do_group_exit+0xd2/0x2f0 get_signal+0x2201/0x24b0 arch_do_signal_or_restart+0x89/0x1be0 exit_to_user_mode_prepare+0x131/0x1a0 syscall_exit_to_user_mode+0x19/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f9185de7b19 Code: Unable to access opcode bytes at RIP 0x7f9185de7aef. RSP: 002b:00007f918335d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f9185efaf68 RCX: 00007f9185de7b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9185efaf68 RBP: 00007f9185efaf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9185efaf6c R13: 00007ffca0e5755f R14: 00007f918335d300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 ---------------- Code disassembly (best guess): 0: e9 3c fe ff ff jmpq 0xfffffe41 5: 48 c7 c0 c0 b6 de 86 mov $0xffffffff86deb6c0,%rax c: 53 push %rbx d: 89 fb mov %edi,%ebx f: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 16: fc ff df 19: 48 89 c1 mov %rax,%rcx 1c: 83 e0 07 and $0x7,%eax 1f: 48 c1 e9 03 shr $0x3,%rcx 23: 83 c0 03 add $0x3,%eax 26: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx * 2a: 38 d0 cmp %dl,%al <-- trapping instruction 2c: 7c 08 jl 0x36 2e: 84 d2 test %dl,%dl 30: 0f 85 e4 00 00 00 jne 0x11a 36: 8b 0d 89 24 bf 05 mov 0x5bf2489(%rip),%ecx # 0x5bf24c5 3c: 85 c9 test %ecx,%ecx 3e: 75 1b jne 0x5b