watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.6:4432] Modules linked in: irq event stamp: 6585265 hardirqs last enabled at (6585264): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (6585265): [<ffffffff844826df>] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (6570236): [<ffffffff8118dd1c>] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (6570239): [<ffffffff8118dd1c>] __irq_exit_rcu+0xcc/0x110 CPU: 0 PID: 4432 Comm: syz-executor.6 Not tainted 6.2.0-next-20230224 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:kasan_get_free_meta+0x4/0x30 Code: 00 48 01 c6 85 c0 b8 00 00 00 00 48 0f 45 c6 e9 d6 74 ca 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 <48> 63 87 c0 00 00 00 48 01 c6 3d ff ff ff 7f b8 00 00 00 00 48 0f RSP: 0018:ffff88806ce09c40 EFLAGS: 00000286 RAX: dffffc0000000000 RBX: ffff88800e360780 RCX: ffff88806c8e6500 RDX: 0000000000000000 RSI: ffff88800e360780 RDI: ffff8880087b6dc0 RBP: ffff8880087b6dc0 R08: 00000000945b4104 R09: ffff8880159d0958 R10: fffffbfff0ba4f52 R11: 0000000000000001 R12: ffffea000038d800 R13: ffffffff83603f0f R14: 00000000000172cc R15: ffff888043df8e30 FS: 00007f6e88589700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557220e93ca8 CR3: 0000000016de8000 CR4: 0000000000350ef0 Call Trace: <IRQ> kasan_quarantine_put+0x14/0x1d0 kmem_cache_free+0xff/0x510 kfree_skbmem+0xef/0x1b0 consume_skb+0xdd/0x170 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x567/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x6e/0x90 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:crc32_body+0x237/0x600 Code: 00 00 48 89 cf 48 c1 ef 03 46 0f b6 1c 27 48 89 cf 83 e7 07 83 c7 03 44 38 df 7c 09 45 84 db 0f 85 55 02 00 00 c1 e8 18 8b 09 <49> 8d 44 85 00 48 89 c7 48 c1 ef 03 46 0f b6 1c 27 48 89 c7 83 e7 RSP: 0018:ffff8880458df3d0 EFLAGS: 00000212 RAX: 0000000000000075 RBX: 00000000417c6668 RCX: 0000000027ab3d78 RDX: 0000000000040000 RSI: 0000000025ef736c RDI: 0000000000000007 RBP: 00000000f44b876e R08: 00000000dae4d027 R09: 0000000033c71f9a R10: 0000000089b90e09 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffffff849f1240 R14: 000000000000000b R15: ffff888042a11de0 chksum_update+0x50/0xb0 crypto_shash_update+0xce/0x130 ext4_inode_csum+0x657/0x8f0 ext4_inode_csum_set+0x16d/0x360 ext4_fill_raw_inode+0x11ad/0x1e90 ext4_mark_iloc_dirty+0x52c/0x1c00 __ext4_mark_inode_dirty+0x207/0x890 ext4_add_nondir+0xf8/0x2a0 ext4_create+0x38a/0x4e0 lookup_open.isra.0+0x1032/0x1400 path_openat+0x97c/0x2750 do_filp_open+0x1ba/0x410 do_sys_openat2+0x171/0x4c0 __x64_sys_openat+0x143/0x200 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f6e8b013b19 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:00007f6e88589188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f6e8b126f60 RCX: 00007f6e8b013b19 RDX: 0000000000101042 RSI: 00000000200000c0 RDI: ffffffffffffff9c RBP: 00007f6e8b06df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc34dde63f R14: 00007f6e88589300 R15: 0000000000022000 </TASK> Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4426 Comm: syz-executor.0 Not tainted 6.2.0-next-20230224 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:write_comp_data+0x2c/0x90 Code: f1 49 89 d2 49 89 f8 65 8b 05 b8 19 b8 7e 89 c6 81 e6 00 01 00 00 65 48 8b 14 25 80 89 03 00 a9 00 01 ff 00 74 0e 85 f6 74 59 <8b> 82 0c 14 00 00 85 c0 74 4f 8b 82 e8 13 00 00 83 f8 03 75 44 48 RSP: 0018:ffff88806cf09698 EFLAGS: 00000006 RAX: 0000000000010100 RBX: 0000000000000000 RCX: ffffffff813eb8c6 RDX: ffff888044c11ac0 RSI: 0000000000000100 RDI: 0000000000000005 RBP: ffff88806cf28140 R08: 0000000000000005 R09: 0000000000000003 R10: 0000000000000003 R11: 0000000000000001 R12: 00000044fb94604e R13: 0000000000000003 R14: 0000000000000000 R15: ffff88806cf2b8c0 FS: 00007f310084f700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557220e1e648 CR3: 0000000016a1e000 CR4: 0000000000350ee0 Call Trace: <IRQ> clockevents_program_event+0xa6/0x360 tick_program_event+0xa4/0x140 hrtimer_interrupt+0x340/0x750 __sysvec_apic_timer_interrupt+0xff/0x4a0 sysvec_apic_timer_interrupt+0x33/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__is_insn_slot_addr+0x7b/0x290 Code: 58 85 ed 0f 85 fd 00 00 00 e8 11 84 ff ff 4c 8d b3 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80 3c 02 00 <0f> 85 fa 01 00 00 48 8b 9b a8 00 00 00 4c 39 f3 74 78 49 bd 00 00 RSP: 0018:ffff88806cf09870 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffffff85651760 RCX: 0000000000000100 RDX: 1ffffffff0aca301 RSI: ffffffff814bf19f RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 00007f31032d9b19 R13: 0000000000000000 R14: ffffffff85651808 R15: ffff888043bb0e30 kernel_text_address+0x48/0xc0 __kernel_text_address+0xd/0x40 unwind_get_return_address+0x59/0xa0 arch_stack_walk+0x9d/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 kasan_save_free_info+0x2e/0x50 __kasan_slab_free+0x10a/0x190 kmem_cache_free+0xff/0x510 kfree_skbmem+0xef/0x1b0 consume_skb+0xdd/0x170 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x567/0xb10 __iterate_interfaces+0x2d3/0x580 ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xcb0 hrtimer_run_softirq+0x14c/0x310 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x6e/0x90 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:kmem_cache_alloc+0x42/0x320 Code: 8b 1d b6 0b 53 04 44 8b 77 1c 65 48 8b 04 25 28 00 00 00 48 89 44 24 10 31 c0 4c 8b 7c 24 48 21 f3 89 df e8 90 bf f7 ff 89 df <e8> b9 bd f7 ff f6 c7 04 0f 85 61 02 00 00 89 de 4c 89 e7 e8 a6 86 RSP: 0018:ffff888044f5f240 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 0000000000092cc0 RCX: ffff888044f5f1c8 RDX: 1ffff11008982482 RSI: 0000000000000000 RDI: 0000000000092cc0 RBP: 00000000000000a8 R08: 0000000000000001 R09: ffff888044c12418 R10: fffffbfff0ba4f52 R11: 0000000000000001 R12: ffff88800844f780 R13: 0000000000092cc0 R14: 00000000000000f0 R15: ffffffff818372ac __create_object+0x3c/0xc90 kmem_cache_alloc+0x204/0x320 __kernfs_new_node+0xd4/0x870 kernfs_new_node+0x97/0x120 __kernfs_create_file+0x55/0x350 sysfs_add_file_mode_ns+0x21c/0x440 internal_create_group+0x322/0xb90 internal_create_groups.part.0+0x90/0x140 sysfs_create_groups+0x29/0x50 device_add+0x1069/0x1ab0 netdev_register_kobject+0x17e/0x3b0 register_netdevice+0xd60/0x1530 register_netdev+0x31/0x60 loopback_net_init+0x7a/0x180 ops_init+0xbb/0x6b0 setup_net+0x3d9/0x990 copy_net_ns+0x321/0x770 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x414/0x500 copy_process+0x2a5e/0x7390 kernel_clone+0xeb/0x8c0 __do_sys_clone3+0x1d5/0x2e0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f31032d9b19 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:00007f310084f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f31033ecf60 RCX: 00007f31032d9b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f3103333f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc46342d9f R14: 00007f310084f300 R15: 0000000000022000 </TASK> ---------------- Code disassembly (best guess): 0: 00 48 01 add %cl,0x1(%rax) 3: c6 85 c0 b8 00 00 00 movb $0x0,0xb8c0(%rbp) a: 00 48 0f add %cl,0xf(%rax) d: 45 c6 rex.RB (bad) f: e9 d6 74 ca 02 jmpq 0x2ca74ea 14: 66 90 xchg %ax,%ax 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 66 0f 1f 00 nopw (%rax) * 2a: 48 63 87 c0 00 00 00 movslq 0xc0(%rdi),%rax <-- trapping instruction 31: 48 01 c6 add %rax,%rsi 34: 3d ff ff ff 7f cmp $0x7fffffff,%eax 39: b8 00 00 00 00 mov $0x0,%eax 3e: 48 rex.W 3f: 0f .byte 0xf