watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.4:4388] Modules linked in: irq event stamp: 12609219 hardirqs last enabled at (12609218): [] asm_sysvec_irq_work+0x1a/0x20 hardirqs last disabled at (12609219): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (12544628): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (12544633): [] irq_exit_rcu+0x93/0xc0 CPU: 1 PID: 4388 Comm: syz-executor.4 Not tainted 6.4.0-next-20230705 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:kmem_cache_alloc+0xff/0x370 Code: 83 78 10 00 4c 8b 00 0f 84 40 02 00 00 4d 85 c0 0f 84 37 02 00 00 41 8b 44 24 28 4d 8b 0c 24 48 8d 4f 40 48 89 fa 49 8b 1c 00 <4c> 89 c0 65 49 0f c7 09 0f 1f 00 48 31 fa 4c 31 c0 48 09 c2 75 af RSP: 0018:ffff88806cf09940 EFLAGS: 00000286 RAX: 0000000000000078 RBX: ffff8880182744c0 RCX: 000000000b84a141 RDX: 000000000b84a101 RSI: 00000000000000f0 RDI: 000000000b84a101 RBP: ffff88806cf09988 R08: ffff888018274850 R09: 000000000003de00 R10: ffffffff85d401d7 R11: 0000000000000001 R12: ffff88800844f780 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff81841d8c FS: 00007fbb1fd1d700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ec97f0e84 CR3: 00000000197f0000 CR4: 0000000000350ee0 Call Trace: __create_object+0x3c/0xc90 kmem_cache_alloc_node+0x238/0x3b0 kmalloc_reserve+0x169/0x270 __alloc_skb+0x129/0x330 skb_copy+0x13d/0x3f0 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb11/0x1330 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x427/0x730 __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:free_tail_page_prepare+0xb6/0x450 Code: 2f 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 44 03 00 00 48 b8 00 04 00 00 00 00 ad de 48 39 43 18 <0f> 85 87 02 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 63 08 4c 89 RSP: 0018:ffff888043357300 EFLAGS: 00000246 RAX: dead000000000400 RBX: ffffea00010a7bc0 RCX: dffffc0000000000 RDX: 1ffffd4000214f7b RSI: ffffea00010a7bc0 RDI: ffffea00010a7a00 RBP: ffffea00010a7a00 R08: 0000000000000000 R09: fffff94000214f76 R10: ffffea00010a7bb7 R11: 0000000000000001 R12: 0000000000000003 R13: ffffea00010a7bd8 R14: 0000000000000000 R15: ffffea00010a7a00 free_unref_page_prepare+0x79d/0xc60 free_unref_page+0x53/0x220 __unfreeze_partials+0x1a7/0x1d0 qlist_free_all+0x6d/0x1a0 kasan_quarantine_reduce+0x199/0x230 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc+0x16b/0x370 __create_object+0x3c/0xc90 __kmem_cache_alloc_node+0x206/0x320 __kmalloc+0x4a/0x160 ext4_find_extent+0xa41/0xd30 ext4_ext_map_blocks+0x1c7/0x5940 ext4_map_blocks+0x763/0x1970 ext4_getblk+0x62d/0x860 ext4_bread+0x2e/0x1a0 ext4_append+0x225/0x540 ext4_init_new_dir+0x262/0x4c0 ext4_mkdir+0x3d3/0xb20 vfs_mkdir+0x24b/0x470 do_mkdirat+0x163/0x2d0 __x64_sys_mkdir+0xf6/0x150 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 RIP: 0033:0x7fbb227a6c27 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 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:00007fbb1fd1cfa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbb227a6c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007fbb1fd1d040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000100 R14: 00007fbb1fd1d000 R15: 0000000000000000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.4.0-next-20230705 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x128/0xb20 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 5c 09 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 6a 21 00 00 f3 90 71 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e4 00 00 RSP: 0018:ffff88806ce09a38 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff84541e5b RDX: fffffbfff0b4ca61 RSI: 0000000000000004 RDI: ffffffff85a65300 RBP: ffffffff85a65300 R08: 0000000000000000 R09: fffffbfff0b4ca60 R10: ffffffff85a65303 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0b4ca60 R14: 0000000000000001 R15: 1ffff1100d9c1348 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f50b1de5e90 CR3: 0000000019d2c000 CR4: 0000000000350ef0 Call Trace: do_raw_spin_lock+0x1e0/0x270 mac80211_hwsim_tx_frame_no_nl.isra.0+0x6e7/0x1330 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x427/0x730 __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:default_idle+0xf/0x20 Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d d3 92 30 00 fb f4 e9 eb 56 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffffffff85407e10 EFLAGS: 00000202 RAX: 0000000000284175 RBX: 0000000000000000 RCX: ffffffff8451d9be RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812894d5 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9c69f8 R10: ffff88806ce34fc3 R11: 0000000000000001 R12: ffffffff85d401d0 R13: 1ffffffff0a80fc7 R14: 0000000000000000 R15: 0000000000000000 default_idle_call+0x67/0xa0 do_idle+0x305/0x3c0 cpu_startup_entry+0x18/0x20 rest_init+0x168/0x290 arch_call_rest_init+0x13/0x40 start_kernel+0x3c4/0x4e0 x86_64_start_reservations+0x18/0x30 x86_64_start_kernel+0xcf/0xe0 secondary_startup_64_no_verify+0x179/0x17b ---------------- Code disassembly (best guess): 0: 83 78 10 00 cmpl $0x0,0x10(%rax) 4: 4c 8b 00 mov (%rax),%r8 7: 0f 84 40 02 00 00 je 0x24d d: 4d 85 c0 test %r8,%r8 10: 0f 84 37 02 00 00 je 0x24d 16: 41 8b 44 24 28 mov 0x28(%r12),%eax 1b: 4d 8b 0c 24 mov (%r12),%r9 1f: 48 8d 4f 40 lea 0x40(%rdi),%rcx 23: 48 89 fa mov %rdi,%rdx 26: 49 8b 1c 00 mov (%r8,%rax,1),%rbx * 2a: 4c 89 c0 mov %r8,%rax <-- trapping instruction 2d: 65 49 0f c7 09 cmpxchg16b %gs:(%r9) 32: 0f 1f 00 nopl (%rax) 35: 48 31 fa xor %rdi,%rdx 38: 4c 31 c0 xor %r8,%rax 3b: 48 09 c2 or %rax,%rdx 3e: 75 af jne 0xffffffef