watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:17875] Modules linked in: irq event stamp: 3217783 hardirqs last enabled at (3217782): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (3217783): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (3196970): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (3196973): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 17875 Comm: syz-executor.2 Not tainted 6.13.0-rc2-next-20241211 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x5c/0x2490 Code: ef 09 00 00 41 8b 1f 31 c0 85 db 0f 84 1e 03 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 6f 58 48 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 07 1a 00 00 49 8b 47 58 4d 8d 6f 48 4c 89 ea 48 89 04 24 48 RSP: 0018:ffff88806ce097a8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000002 RCX: 0000000000000001 RDX: 1ffff1100d9c130e RSI: ffffffff83af62bd RDI: ffff88806ce09818 RBP: ffff88806ce09870 R08: 0000000000000001 R09: ffff88806ce09858 R10: 000000000003a7e3 R11: 0000000000022aaa R12: ffff88806ce098e0 R13: 0000000000000000 R14: ffff88801631d340 R15: ffff88806ce09818 FS: 00007f0aa3c3c700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e924000 CR3: 000000003e6f0000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x8f/0xc0 set_track_prepare+0x36/0x70 __alloc_object+0xf4/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_node_noprof+0x311/0x3e0 __alloc_skb+0x2ad/0x370 __netdev_alloc_skb+0x7a/0x7c0 __ieee80211_beacon_get+0x3f4/0xfc0 ieee80211_beacon_get_tim+0xa6/0x280 mac80211_hwsim_beacon_tx+0x49b/0x950 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ab/0xa80 hrtimer_run_softirq+0x14c/0x310 handle_softirqs+0x1b1/0x770 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:qlist_free_all+0x96/0x160 Code: 0f 82 e0 00 00 00 48 c7 c2 00 00 00 80 48 2b 15 60 a8 d2 03 48 01 ca 48 c1 ea 0c 48 c1 e2 06 48 03 15 3e a8 d2 03 48 8b 72 08 <48> 89 d1 40 f6 c6 01 0f 85 a1 00 00 00 66 90 80 79 33 f5 ba 00 00 RSP: 0018:ffff888030bc77c0 EFLAGS: 00000286 RAX: ffff888015323250 RBX: ffff888015323250 RCX: ffff888095323250 RDX: ffffea000054c8c0 RSI: ffff888008c4f780 RDI: 0000000000080000 RBP: 0000000000000000 R08: ffff88800c42c4a0 R09: 00000000000d0008 R10: ffffea0000310b00 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888030bc77f8 R14: ffff88800c42c4a0 R15: ffff88800c42c4a0 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 __kmalloc_cache_noprof+0x149/0x3e0 seq_create_client1+0x4c/0x500 snd_seq_open+0x5b/0x600 snd_open+0x1e7/0x3f0 chrdev_open+0x235/0x690 do_dentry_open+0x71c/0x1420 vfs_open+0x82/0x3f0 path_openat+0x1cfa/0x2990 do_filp_open+0x1e9/0x450 do_sys_openat2+0x164/0x1d0 __x64_sys_openat+0x143/0x200 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0aa66c6b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0aa3c3c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f0aa67d9f60 RCX: 00007f0aa66c6b19 RDX: 0000000000002001 RSI: 00000000200000c0 RDI: ffffffffffffff9c RBP: 00007f0aa6720f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9177586f R14: 00007f0aa3c3c300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0x1e/0x30 random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. syz-executor.6 (17997) used greatest stack depth: 22712 bytes left loop1: detected capacity change from 0 to 256 loop1: detected capacity change from 0 to 256 loop1: detected capacity change from 0 to 256 loop1: detected capacity change from 0 to 256 random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption Restarting kernel threads ... done. random: crng reseeded on system resumption ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 00 00 add %al,(%rax) 2: 41 8b 1f mov (%r15),%ebx 5: 31 c0 xor %eax,%eax 7: 85 db test %ebx,%ebx 9: 0f 84 1e 03 00 00 je 0x32d f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 16: fc ff df 19: 49 8d 6f 58 lea 0x58(%r15),%rbp 1d: 48 89 ea mov %rbp,%rdx 20: 48 c1 ea 03 shr $0x3,%rdx 24: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 28: 0f 85 07 1a 00 00 jne 0x1a35 <-- trapping instruction 2e: 49 8b 47 58 mov 0x58(%r15),%rax 32: 4d 8d 6f 48 lea 0x48(%r15),%r13 36: 4c 89 ea mov %r13,%rdx 39: 48 89 04 24 mov %rax,(%rsp) 3d: 48 rex.W