watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:19165] Modules linked in: irq event stamp: 4847235 hardirqs last enabled at (4847234): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (4847235): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (4813334): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (4813337): [] irq_exit_rcu+0x93/0xc0 CPU: 0 PID: 19165 Comm: syz-executor.4 Not tainted 6.5.0-rc4-next-20230731 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:arch_stack_walk+0x87/0xf0 Code: ff e8 ed 6b 07 00 8b 95 68 ff ff ff 85 d2 75 24 eb 36 4c 89 e7 e8 79 8d 50 03 84 c0 74 2a 48 8d bd 68 ff ff ff e8 29 47 07 00 <8b> 85 68 ff ff ff 85 c0 74 14 48 8d bd 68 ff ff ff e8 83 44 07 00 RSP: 0018:ffff88806ce09688 EFLAGS: 00000296 RAX: 0000000000000001 RBX: ffffffff813b5ee0 RCX: ffffffff864e5f7e RDX: 1ffff1100d9c12d3 RSI: 0000000000000000 RDI: ffff88806ce09698 RBP: ffff88806ce09720 R08: ffffffff864e5f82 R09: ffff88806ce096c8 R10: 0000000000038001 R11: 00000000000b91f6 R12: ffff88806ce09750 R13: 0000000000000000 R14: ffff888041ce3680 R15: 0000000000092820 FS: 00007f75440b1700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe9fdd9b000 CR3: 00000000449d4000 CR4: 0000000000350ef0 Call Trace: stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc+0x17b/0x390 __create_object+0x3c/0xc90 kmem_cache_alloc_node+0x23d/0x3b0 __alloc_skb+0x28c/0x330 __netdev_alloc_skb+0x72/0x370 __ieee80211_beacon_get+0x3f6/0xfc0 ieee80211_beacon_get_tim+0xa1/0x550 mac80211_hwsim_beacon_tx+0x402/0x730 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x59d/0xb60 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x1b7/0x7d4 irq_exit_rcu+0x93/0xc0 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:lock_acquire+0x1c7/0x4c0 Code: ff ff 48 83 c4 28 65 0f c1 05 c5 88 d4 7e 83 f8 01 0f 85 8f 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:ffff888043d1f698 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff110087a3ed5 RCX: 0000000000000002 RDX: 1ffff1100839c80d RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff0f1c912 R10: ffffffff878e4897 R11: 1ffffffff0e85501 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff856d2250 R15: 0000000000000000 kasan_quarantine_reduce+0x88/0x230 __kasan_kmalloc+0x6f/0x90 tty_ldisc_get.part.0+0x116/0x320 tty_ldisc_init+0x19/0xa0 alloc_tty_struct+0xe5/0x8a0 tty_init_dev.part.0+0x20/0x670 tty_open+0xbff/0x13c0 chrdev_open+0x275/0x6e0 do_dentry_open+0x69b/0x15c0 path_openat+0x1859/0x2710 do_filp_open+0x1ba/0x410 do_sys_openat2+0x164/0x1d0 __x64_sys_openat+0x143/0x200 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f7546aeea04 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f75440b0cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f7546c4ef60 RCX: 00007f7546aeea04 RDX: 0000000000000002 RSI: 00007f75440b0d60 RDI: 00000000ffffff9c RBP: 00007f75440b0d60 R08: 0000000000000000 R09: 000000000000000e R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffcbbdd022f R14: 00007f75440b1300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 ed 6b 07 00 callq 0x76bf2 5: 8b 95 68 ff ff ff mov -0x98(%rbp),%edx b: 85 d2 test %edx,%edx d: 75 24 jne 0x33 f: eb 36 jmp 0x47 11: 4c 89 e7 mov %r12,%rdi 14: e8 79 8d 50 03 callq 0x3508d92 19: 84 c0 test %al,%al 1b: 74 2a je 0x47 1d: 48 8d bd 68 ff ff ff lea -0x98(%rbp),%rdi 24: e8 29 47 07 00 callq 0x74752 * 29: 8b 85 68 ff ff ff mov -0x98(%rbp),%eax <-- trapping instruction 2f: 85 c0 test %eax,%eax 31: 74 14 je 0x47 33: 48 8d bd 68 ff ff ff lea -0x98(%rbp),%rdi 3a: e8 83 44 07 00 callq 0x744c2