watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.7:4112] Modules linked in: irq event stamp: 6723989 hardirqs last enabled at (6723988): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (6723989): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (6718028): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (6718031): [] irq_exit_rcu+0x93/0xc0 CPU: 0 PID: 4112 Comm: syz-executor.7 Not tainted 6.4.0-rc6-next-20230613 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:ieee80211_rx_handlers+0x5930/0x9790 Code: 80 fd 01 45 19 ed e8 4f 9e 23 fd 41 f7 d5 49 8d 7f 4c 41 81 e5 f4 01 00 00 48 89 f8 48 c1 e8 03 44 01 ed 89 ac 24 38 01 00 00 <42> 0f b6 14 20 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 RSP: 0018:ffff88806ce09880 EFLAGS: 00000202 RAX: 1ffff1100d9c13b7 RBX: ffff888045f50640 RCX: 0000000000000100 RDX: ffff8880168bb680 RSI: ffffffff84286b11 RDI: ffff88806ce09dbc RBP: 000000000024cde0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888019864b80 R15: ffff88806ce09d70 FS: 00007f4a56747700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555ddb708 CR3: 0000000016f22000 CR4: 0000000000350ef0 Call Trace: ieee80211_prepare_and_rx_handle+0x218a/0x59c0 ieee80211_rx_for_interface+0x10e/0x200 ieee80211_rx_list+0x1e34/0x2d10 ieee80211_rx_napi+0xde/0x3c0 ieee80211_tasklet_handler+0xd6/0x130 tasklet_action_common.constprop.0+0x267/0x700 __do_softirq+0x1b7/0x7d4 irq_exit_rcu+0x93/0xc0 sysvec_irq_work+0x6e/0x90 asm_sysvec_irq_work+0x1a/0x20 RIP: 0010:finish_task_switch.isra.0+0x20d/0x830 Code: 89 ff 48 c7 03 00 00 00 00 e8 8f 83 2f 03 4d 85 e4 75 ba 4c 89 ff e8 62 5e 2f 03 e8 dd 02 30 00 fb 65 48 8b 1c 25 00 8b 03 00 <48> 8d bb 78 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffff888045c8f3c0 EFLAGS: 00000202 RAX: 0000000000011b4f RBX: ffff8880168bb680 RCX: ffffffff812ce36f RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812340a3 RBP: ffff888045c8f400 R08: 0000000000000001 R09: fffffbfff0ef6761 R10: ffffffff877b3b0f R11: 0000000000000001 R12: ffff88806ce39518 R13: ffff888015979b40 R14: ffff8880160f1fe8 R15: ffff88806ce39500 __schedule+0x9b1/0x2b10 __cond_resched+0x46/0x70 down_write+0x73/0x1f0 kernfs_remove_by_name_ns+0x89/0x130 remove_files+0x96/0x1c0 sysfs_remove_group+0x8b/0x170 netdev_queue_update_kobjects+0x2e8/0x450 netdev_unregister_kobject+0x169/0x280 unregister_netdevice_many_notify+0xa1e/0x1500 default_device_exit_batch+0x453/0x5c0 ops_exit_list+0x12b/0x180 setup_net+0x5ea/0x990 copy_net_ns+0x321/0x770 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x414/0x500 copy_process+0x2b78/0x7320 kernel_clone+0xeb/0x7d0 __do_sys_clone3+0x1d5/0x250 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7f4a591f2b19 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:00007f4a56747188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f4a59306020 RCX: 00007f4a591f2b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f4a5924cf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1735937f R14: 00007f4a56747300 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): 0: 80 fd 01 cmp $0x1,%ch 3: 45 19 ed sbb %r13d,%r13d 6: e8 4f 9e 23 fd callq 0xfd239e5a b: 41 f7 d5 not %r13d e: 49 8d 7f 4c lea 0x4c(%r15),%rdi 12: 41 81 e5 f4 01 00 00 and $0x1f4,%r13d 19: 48 89 f8 mov %rdi,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 44 01 ed add %r13d,%ebp 23: 89 ac 24 38 01 00 00 mov %ebp,0x138(%rsp) * 2a: 42 0f b6 14 20 movzbl (%rax,%r12,1),%edx <-- trapping instruction 2f: 48 89 f8 mov %rdi,%rax 32: 83 e0 07 and $0x7,%eax 35: 83 c0 03 add $0x3,%eax 38: 38 d0 cmp %dl,%al 3a: 7c 08 jl 0x44 3c: 84 d2 test %dl,%dl 3e: 0f .byte 0xf 3f: 85 .byte 0x85