watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.7:22625] Modules linked in: irq event stamp: 9142853 hardirqs last enabled at (9142852): [<ffffffff8460144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (9142853): [<ffffffff844226df>] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (9140600): [<ffffffff81181eab>] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (9140603): [<ffffffff81181eab>] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 22625 Comm: syz-executor.7 Not tainted 6.2.0-rc2-next-20230105 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__create_object+0x40/0xc40 Code: 48 83 ec 20 48 8b 3d 9f 9f 1e 06 48 85 ff 0f 84 a4 06 00 00 81 e1 e0 0e 00 08 89 ce 81 ce 00 20 09 00 e8 c3 13 fc ff 49 89 c7 <48> 85 c0 0f 84 85 06 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 67 RSP: 0018:ffff88806ce09308 EFLAGS: 00000292 RAX: ffff88804cb94260 RBX: 00000000000000f0 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000 RBP: ffff88803d3cf640 R08: 00000000ffffffff R09: ffff88800da2aa80 R10: ffff88806cafe478 R11: 0000000000000001 R12: ffff888008794dc0 R13: 0000000000000000 R14: 0000000000000001 R15: ffff88804cb94260 FS: 00007f050f929700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c121000 CR3: 000000003ef28000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: <IRQ> kmem_cache_alloc_node+0x215/0x310 __alloc_skb+0x21a/0x310 __tcp_send_ack.part.0+0x67/0x620 tcp_send_ack+0x81/0xa0 __tcp_ack_snd_check+0x156/0x9e0 tcp_rcv_established+0x91e/0x2150 tcp_v4_do_rcv+0x683/0x9e0 tcp_v4_rcv+0x2e86/0x3140 ip_protocol_deliver_rcu+0xba/0x4c0 ip_local_deliver_finish+0x2e0/0x4f0 ip_local_deliver+0x1b2/0x200 ip_sublist_rcv_finish+0x274/0x570 ip_list_rcv_finish.constprop.0+0x3a5/0x530 ip_list_rcv+0x2bd/0x3b0 __netif_receive_skb_list_core+0x695/0x8d0 netif_receive_skb_list_internal+0x6d0/0xce0 napi_complete_done+0x242/0x850 e1000_clean+0x9b8/0x1c60 __napi_poll+0xb5/0x440 net_rx_action+0x8e1/0xc10 __do_softirq+0x1c7/0x913 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:put_cpu_partial+0x115/0x1c0 Code: 39 43 28 75 61 48 c7 43 28 00 00 00 00 48 c7 c6 30 06 7d 81 48 89 df e8 a9 12 af ff 48 85 ed 74 06 e8 4f 85 d3 ff fb 4d 85 ed <74> 21 5b 4c 89 ee 5d 4c 89 e7 41 5c 41 5d 41 5e 41 5f e9 54 fa ff RSP: 0018:ffff888048fdf960 EFLAGS: 00000246 RAX: 00000000004e4ffb RBX: ffff88806ce3d960 RCX: ffffffff812b7aef RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000200 R08: 0000000000000001 R09: ffffffff8764d967 R10: fffffbfff0ec9b2c R11: 0000000000000001 R12: ffff88800844f780 R13: 0000000000000000 R14: ffffea0000387180 R15: 0000000000000001 qlist_free_all+0x6d/0x1a0 kasan_quarantine_reduce+0x196/0x230 __kasan_slab_alloc+0x4c/0x70 kmem_cache_alloc+0x172/0x300 security_inode_alloc+0x38/0x160 inode_init_always+0xbb2/0xea0 alloc_inode+0x84/0x240 new_inode+0x25/0x1f0 __ext4_new_inode+0x32f/0x56d0 ext4_mkdir+0x33e/0xb20 vfs_mkdir+0x495/0x740 do_mkdirat+0x16e/0x2d0 __x64_sys_mkdir+0xf6/0x150 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f05123b2c27 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:00007f050f928fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f05123b2c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000100 RBP: 00007f050f929040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000020000100 R14: 00007f050f929000 R15: 0000000000000000 </TASK> Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 232 Comm: sshd Not tainted 6.2.0-rc2-next-20230105 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x128/0xc90 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 e7 0a 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 0e 20 00 00 f3 90 <e9> 71 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e5 00 00 RSP: 0018:ffff8880158e7908 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff844452bb RDX: ffffed1002e9e314 RSI: 0000000000000004 RDI: ffff8880174f1898 RBP: ffff8880174f1898 R08: 0000000000000000 R09: ffff8880174f189b R10: ffffed1002e9e313 R11: 0000000000000001 R12: 0000000000000003 R13: ffffed1002e9e313 R14: 0000000000000001 R15: 1ffff11002b1cf22 FS: 00007fdeff36d900(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0031a3000 CR3: 000000000b868000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: <TASK> do_raw_spin_lock+0x1e0/0x270 lock_sock_nested+0x5f/0xf0 tcp_recvmsg+0xf8/0x640 inet_recvmsg+0x12b/0x6c0 sock_recvmsg+0x12f/0x190 sock_read_iter+0x2c1/0x3b0 vfs_read+0x806/0x940 ksys_read+0x1f4/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fdeff84fe8e Code: c0 e9 b6 fe ff ff 50 48 8d 3d 6e 18 0a 00 e8 b9 e7 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28 RSP: 002b:00007ffe6e20c808 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007ffe6e21089f RCX: 00007fdeff84fe8e RDX: 0000000000004000 RSI: 00007ffe6e20c810 RDI: 0000000000000004 RBP: 0000000000000004 R08: 00000000000003b8 R09: 00007ffe6e3ad080 R10: 00007ffe6e3ad0f0 R11: 0000000000000246 R12: 000055838d1d7ec0 R13: 00007ffe6e20c810 R14: 0000000000000004 R15: 000055838c1d6a80 </TASK> ---------------- Code disassembly (best guess): 0: 48 83 ec 20 sub $0x20,%rsp 4: 48 8b 3d 9f 9f 1e 06 mov 0x61e9f9f(%rip),%rdi # 0x61e9faa b: 48 85 ff test %rdi,%rdi e: 0f 84 a4 06 00 00 je 0x6b8 14: 81 e1 e0 0e 00 08 and $0x8000ee0,%ecx 1a: 89 ce mov %ecx,%esi 1c: 81 ce 00 20 09 00 or $0x92000,%esi 22: e8 c3 13 fc ff callq 0xfffc13ea 27: 49 89 c7 mov %rax,%r15 * 2a: 48 85 c0 test %rax,%rax <-- trapping instruction 2d: 0f 84 85 06 00 00 je 0x6b8 33: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3a: fc ff df 3d: 4d rex.WRB 3e: 8d .byte 0x8d 3f: 67 addr32