watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.4:8470] Modules linked in: irq event stamp: 4737249 hardirqs last enabled at (4737248): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (4737249): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (4624046): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (4624049): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 8470 Comm: syz-executor.4 Not tainted 6.2.0-rc1-next-20221226 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:preempt_count_add+0x3c/0x150 Code: 00 fc ff df 48 89 c1 53 83 e0 07 89 fb 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 e9 00 00 00 8b 15 d4 2b 7a 06 <65> 01 1d 15 bd e1 7e 85 d2 75 11 65 8b 05 0a bd e1 7e 0f b6 c0 3d RSP: 0018:ffff88806ce09598 EFLAGS: 00000297 RAX: 0000000000000003 RBX: 0000000000000001 RCX: 1ffffffff0f37ef8 RDX: 0000000000000000 RSI: ffffffff817cb1a5 RDI: 0000000000000001 RBP: ffff88806ce09688 R08: ffffffff8608adf6 R09: ffffffff8608adfa R10: ffff88806ce09ff8 R11: ffff88806ce09670 R12: ffff88806ce096f8 R13: 0000000000000000 R14: ffff88806ce09630 R15: 00000000000000f0 FS: 00007f092f598700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2be28000 CR3: 0000000046600000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: unwind_next_frame+0xb0/0x2130 arch_stack_walk+0x87/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x5c/0x70 kmem_cache_alloc+0x1e1/0x410 __create_object+0x3d/0xc40 __kmem_cache_alloc_node+0x25b/0x400 __kmalloc_node_track_caller+0x43/0xb0 __alloc_skb+0xe9/0x310 skb_copy+0x13d/0x3d0 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb6d/0x1360 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x566/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xc70 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:unwind_next_frame+0x1040/0x2130 Code: 4c 89 c7 83 e7 07 40 38 fe 40 0f 9e c7 40 84 f6 40 0f 95 c6 40 84 f7 75 17 83 e0 07 38 c2 40 0f 9e c6 84 d2 0f 95 c0 40 84 c6 <0f> 84 b3 f5 ff ff 4c 89 c7 be 02 00 00 00 4c 89 4c 24 28 48 89 4c RSP: 0018:ffff88800fcb6ca0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88800fcb6e08 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88800fcb6dc8 R08: ffffffff86043fa2 R09: ffffffff86043fa6 R10: ffffed1001f96dbb R11: 0000000000038001 R12: ffff88800fcb6db1 R13: ffff88800fcb6dd0 R14: ffff88800fcb6d70 R15: ffffffff86043fa7 __unwind_start+0x513/0x7c0 arch_stack_walk+0x63/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 __kasan_record_aux_stack+0x95/0xb0 __call_rcu_common.constprop.0+0x6a/0x9f0 __kmem_cache_free+0x95/0x410 ext4_xattr_block_set+0x401/0x3020 ext4_xattr_set_handle+0xd6e/0x14e0 ext4_initxattrs+0xb9/0x120 security_inode_init_security+0x1ab/0x360 __ext4_new_inode+0x39a9/0x55e0 ext4_create+0x2e4/0x4e0 lookup_open.isra.0+0xed0/0x1250 path_openat+0x946/0x29b0 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: 0033:0x7f0932022b19 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:00007f092f598188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f0932135f60 RCX: 00007f0932022b19 RDX: 0000000000004042 RSI: 0000000020000100 RDI: ffffffffffffff9c RBP: 00007f093207cf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa36e6ccf R14: 00007f092f598300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.2.0-rc1-next-20221226 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x128/0xc80 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 cd 0a 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 de 1f 00 00 f3 90 71 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e5 00 00 RSP: 0018:ffff88806cf09a28 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8440b92b RDX: fffffbfff0b48571 RSI: 0000000000000004 RDI: ffffffff85a42b80 RBP: ffffffff85a42b80 R08: 0000000000000000 R09: ffffffff85a42b83 R10: fffffbfff0b48570 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0b48570 R14: 0000000000000001 R15: 1ffff1100d9e1346 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4f80430010 CR3: 00000000160e4000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: do_raw_spin_lock+0x1e0/0x270 mac80211_hwsim_tx_frame_no_nl.isra.0+0x6f1/0x1360 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x566/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xc70 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:default_idle+0xf/0x20 Code: 70 01 fe cc cc cc cc cc cc cc cc 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 43 e9 41 00 fb f4 80 44 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 RSP: 0018:ffff888008df7e58 EFLAGS: 00000206 RAX: ffffffff844094f0 RBX: ffff888008d85040 RCX: ffffffff843ea842 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff88806cf34f03 R10: ffffed100d9e69e0 R11: 0000000000000001 R12: ffffed10011b0a08 R13: ffffffff85d09410 R14: 0000000000000000 R15: dffffc0000000000 default_idle_call+0x88/0xd0 do_idle+0x3bd/0x530 cpu_startup_entry+0x18/0x20 start_secondary+0x1cc/0x220 secondary_startup_64_no_verify+0xe0/0xeb ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 48 89 c1 mov %rax,%rcx 3: 53 push %rbx 4: 83 e0 07 and $0x7,%eax 7: 89 fb mov %edi,%ebx 9: 48 c1 e9 03 shr $0x3,%rcx d: 83 c0 03 add $0x3,%eax 10: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx 14: 38 d0 cmp %dl,%al 16: 7c 08 jl 0x20 18: 84 d2 test %dl,%dl 1a: 0f 85 e9 00 00 00 jne 0x109 20: 8b 15 d4 2b 7a 06 mov 0x67a2bd4(%rip),%edx # 0x67a2bfa * 26: 65 01 1d 15 bd e1 7e add %ebx,%gs:0x7ee1bd15(%rip) # 0x7ee1bd42 <-- trapping instruction 2d: 85 d2 test %edx,%edx 2f: 75 11 jne 0x42 31: 65 8b 05 0a bd e1 7e mov %gs:0x7ee1bd0a(%rip),%eax # 0x7ee1bd42 38: 0f b6 c0 movzbl %al,%eax 3b: 3d .byte 0x3d