audit: type=1400 audit(1731786392.454:14): avc: denied { block_suspend } for pid=6444 comm="syz-executor.5" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.5:6460] Modules linked in: irq event stamp: 2582659 hardirqs last enabled at (2582658): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2582659): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2486450): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2486455): [] __irq_exit_rcu+0xc4/0x100 CPU: 1 UID: 0 PID: 6460 Comm: syz-executor.5 Not tainted 6.12.0-rc7-next-20241115 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x10/0x2490 Code: a6 50 77 00 e9 3a ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 41 57 <48> 89 fa 49 89 ff 41 56 48 c1 ea 03 41 55 41 54 55 53 48 83 ec 38 RSP: 0018:ffff88806cf095d8 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: ffffffff813f2300 RCX: 0000000000000001 RDX: 1ffff1100d9e12ed RSI: ffffffff845c66b4 RDI: ffff88806cf095e8 RBP: ffff88806cf09680 R08: 0000000000000001 R09: ffff88806cf09628 R10: 000000000003c001 R11: 0000000000095ba2 R12: ffff88806cf096b0 R13: 0000000000000000 R14: ffff88800b511b80 R15: 0000000000092820 FS: 00007f50b3dc2700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000562adda6fdb0 CR3: 000000002ce16000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/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/0xa70 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:lock_acquire.part.0+0x10e/0x320 Code: b6 c9 e8 65 a6 ff ff b8 ff ff ff ff 48 83 c4 28 65 0f c1 05 ec 48 d2 7e 83 f8 01 0f 85 aa 01 00 00 48 85 ed 0f 85 9b 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffff8880166e6ab8 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff11002cdcd5a RCX: 1ffff11002cdcd3f RDX: 1ffff110016a24b7 RSI: 0000000000000001 RDI: 000000003dfb2504 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff0fdddec R10: ffffffff87eeef67 R11: 00000000000c3893 R12: ffffffff85c16180 R13: 0000000000000000 R14: ffff88800b511b80 R15: ffff888015432000 __is_insn_slot_addr+0x3f/0x290 kernel_text_address+0x5b/0xc0 __kernel_text_address+0xd/0x40 unwind_get_return_address+0x59/0xa0 arch_stack_walk+0x9d/0xf0 stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 __kasan_record_aux_stack+0x8c/0xa0 __call_rcu_common.constprop.0+0x6a/0xaa0 kfree+0x28e/0x480 __free_slab+0x10d/0x130 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_noprof+0x300/0x3d0 __kernfs_new_node+0xd4/0x850 kernfs_new_node+0x18b/0x250 __kernfs_create_file+0x55/0x360 sysfs_add_file_mode_ns+0x21c/0x440 internal_create_group+0x573/0xeb0 internal_create_groups.part.0+0x90/0x140 sysfs_create_groups+0x29/0x50 device_add+0xf4c/0x17f0 netdev_register_kobject+0x182/0x3b0 register_netdevice+0x1332/0x1ab0 register_netdev+0x31/0x60 loopback_net_init+0x7a/0x180 ops_init+0x1e1/0x650 setup_net+0x1d7/0x7a0 copy_net_ns+0x2e3/0x6f0 create_new_namespaces+0x3f6/0xaf0 copy_namespaces+0x45c/0x580 copy_process+0x2704/0x8e90 kernel_clone+0xeb/0x850 __do_sys_clone3+0x1d9/0x260 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f50b686db19 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:00007f50b3dc2188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f50b6981020 RCX: 00007f50b686db19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f50b68c7f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffffae76c9f R14: 00007f50b3dc2300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0x1e/0x30 ---------------- Code disassembly (best guess): 0: a6 cmpsb %es:(%rdi),%ds:(%rsi) 1: 50 push %rax 2: 77 00 ja 0x4 4: e9 3a ff ff ff jmpq 0xffffff43 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: f3 0f 1e fa endbr64 1e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 25: fc ff df 28: 41 57 push %r15 * 2a: 48 89 fa mov %rdi,%rdx <-- trapping instruction 2d: 49 89 ff mov %rdi,%r15 30: 41 56 push %r14 32: 48 c1 ea 03 shr $0x3,%rdx 36: 41 55 push %r13 38: 41 54 push %r12 3a: 55 push %rbp 3b: 53 push %rbx 3c: 48 83 ec 38 sub $0x38,%rsp