watchdog: BUG: soft lockup - CPU#0 stuck for 24s! [syz-executor.6:46055] Modules linked in: irq event stamp: 8705503 hardirqs last enabled at (8705502): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (8705503): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (8635300): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (8635303): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 46055 Comm: syz-executor.6 Not tainted 6.1.0-rc7-next-20221205 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:___slab_alloc+0x6f/0x1080 Code: 8b 43 10 48 89 44 24 38 48 85 c0 0f 84 9f 02 00 00 41 83 fc ff 74 10 48 8b 10 48 c1 ea 3a 41 39 d4 0f 85 9e 02 00 00 48 8b 00 20 0f 85 fa 02 00 00 9c 41 5d 4c 89 6c 24 10 4c 89 e8 fa 25 00 RSP: 0018:ffff88806ce09988 EFLAGS: 00000246 RAX: 0100000000010200 RBX: ffff88806ce3d880 RCX: ffffffff8180a9cd RDX: 00000000ffffffff RSI: 0000000000092a20 RDI: ffff88800844f780 RBP: ffff88800844f780 R08: ffff88806ce3d880 R09: 0000000000000170 R10: ffff88806c9a1758 R11: 0000000000000001 R12: 00000000ffffffff R13: 00000000ffffffff R14: ffff8880475b1ac0 R15: 0000000000000170 FS: 00007f5d8a5ea700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3333e000 CR3: 0000000018486000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __slab_alloc.constprop.0+0x4d/0x90 kmem_cache_alloc+0x356/0x410 __create_object+0x3d/0xc10 kmem_cache_alloc_node+0x283/0x420 __alloc_skb+0x21a/0x310 __netdev_alloc_skb+0x76/0x3e0 __ieee80211_beacon_get+0x3d9/0x1310 ieee80211_beacon_get_tim+0x99/0x4f0 mac80211_hwsim_beacon_tx+0x1d2/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xba0 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x8f9 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:lock_acquire+0x1df/0x530 Code: 03 b8 ff ff ff ff 65 0f c1 05 15 65 d6 7e 83 f8 01 0f 85 c8 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffff8880352276a0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff11006a44ed6 RCX: 0000000000006997 RDX: 1ffff11008eb6483 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8762d8d7 R10: fffffbfff0ec5b1a R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff856c67e0 R15: 0000000000000000 fs_reclaim_acquire+0xda/0x170 __kmem_cache_alloc_node+0x41/0x400 __kmalloc_node_track_caller+0x43/0xb0 kmemdup+0x2c/0x60 cache_create_net+0x32/0x230 unix_gid_cache_create+0x147/0x370 sunrpc_init_net+0x162/0x3d0 ops_init+0xbb/0x680 setup_net+0x40c/0x9d0 copy_net_ns+0x31c/0x760 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x3b7/0x4a0 copy_process+0x29e3/0x7220 kernel_clone+0xeb/0x950 __do_sys_clone3+0x1d9/0x370 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f5d8d074b19 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:00007f5d8a5ea188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f5d8d187f60 RCX: 00007f5d8d074b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f5d8d0cef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe50d6047f R14: 00007f5d8a5ea300 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: 8b 43 10 mov 0x10(%rbx),%eax 3: 48 89 44 24 38 mov %rax,0x38(%rsp) 8: 48 85 c0 test %rax,%rax b: 0f 84 9f 02 00 00 je 0x2b0 11: 41 83 fc ff cmp $0xffffffff,%r12d 15: 74 10 je 0x27 17: 48 8b 10 mov (%rax),%rdx 1a: 48 c1 ea 3a shr $0x3a,%rdx 1e: 41 39 d4 cmp %edx,%r12d 21: 0f 85 9e 02 00 00 jne 0x2c5 27: 48 8b 00 mov (%rax),%rax * 2a: a8 20 test $0x20,%al <-- trapping instruction 2c: 0f 85 fa 02 00 00 jne 0x32c 32: 9c pushfq 33: 41 5d pop %r13 35: 4c 89 6c 24 10 mov %r13,0x10(%rsp) 3a: 4c 89 e8 mov %r13,%rax 3d: fa cli 3e: 25 .byte 0x25