watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:14691] Modules linked in: irq event stamp: 4482115 hardirqs last enabled at (4482114): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4482115): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (4358028): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4358031): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 14691 Comm: syz-executor.1 Not tainted 5.10.226 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 Code: 38 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 9a a1 3f fd 48 89 ef e8 62 5b 40 fd f6 c7 02 75 10 53 9d <65> ff 0d 34 de 1a 7c 5b 5d e9 ad ae 38 00 e8 a8 7c 5f fd eb e9 66 RSP: 0018:ffff88806ce09aa0 EFLAGS: 00000246 RAX: 00000000004461e6 RBX: 0000000000000246 RCX: 1ffffffff0d1598a RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e79118 RBP: ffffffff850a6880 R08: 0000000000000001 R09: ffffffff86868797 R10: fffffbfff0d0d0f2 R11: 0000000000000001 R12: 0000000000000a20 R13: 0000000000000a20 R14: 00000000ffffffff R15: 0000000000000000 FS: 00007f87a1341700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ca2f000 CR3: 000000004aa86000 CR4: 0000000000350ef0 Call Trace: kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x169/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:199 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:447 netdev_alloc_skb include/linux/skbuff.h:2857 [inline] dev_alloc_skb include/linux/skbuff.h:2870 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:files_lookup_fd_raw include/linux/fdtable.h:87 [inline] RIP: 0010:__fget_files+0x23f/0x520 fs/file.c:845 Code: 0f 85 c7 02 00 00 48 8b 44 24 08 48 8b 68 58 48 89 e8 48 c1 e8 03 42 0f b6 04 28 84 c0 74 08 3c 03 0f 8e b5 02 00 00 8b 5d 00 <44> 89 f7 89 de e8 97 1f c8 ff 41 39 de 73 4b e8 bd 26 c8 ff 48 8b RSP: 0018:ffff8880494afb78 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000100 RCX: ffffc90001c8c000 RDX: 0000000000040000 RSI: ffffffff8178783d RDI: 0000000000000001 RBP: ffff888046cd2700 R08: 0000000000000001 R09: ffff88803c4b82ff R10: 0000000000000000 R11: 0000000000000001 R12: ffff88803c4b8280 R13: dffffc0000000000 R14: 0000000000000005 R15: 0000000000000001 io_file_get_normal+0x1e/0x270 io_uring/io_uring.c:6965 io_file_get io_uring/io_uring.c:6982 [inline] io_init_req io_uring/io_uring.c:7201 [inline] io_submit_sqe io_uring/io_uring.c:7219 [inline] io_submit_sqes+0x3907/0x8610 io_uring/io_uring.c:7393 __do_sys_io_uring_enter+0x6b5/0x18c0 io_uring/io_uring.c:9920 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f87a3dcbb19 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:00007f87a1341188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f87a3edef60 RCX: 00007f87a3dcbb19 RDX: 0000000000000000 RSI: 00000000000058ab RDI: 0000000000000004 RBP: 00007f87a3e25f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffe7f6a6bf R14: 00007f87a1341300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 14693 Comm: syz-executor.3 Not tainted 5.10.226 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:rol32 include/linux/bitops.h:105 [inline] RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:416 [inline] RIP: 0010:__lock_acquire+0xc27/0x5b00 kernel/locking/lockdep.c:4943 Code: 8b 4c 24 08 8b 5c 24 60 c1 e0 0d 66 0b 44 24 18 98 2b 44 24 50 33 44 24 58 89 c2 29 c1 01 d8 c1 c2 06 31 ca 89 d1 29 d3 01 c2 c1 08 31 d9 89 ce 29 c8 01 d1 c1 c6 10 89 cf 31 f0 89 c6 29 c2 RSP: 0018:ffff88806cf09c38 EFLAGS: 00000087 RAX: 00000000ffffbfc0 RBX: 0000000000104f7c RCX: 00000000ffefb082 RDX: 00000000ffef7042 RSI: 0000000000000008 RDI: ffffffff8686b840 RBP: 0000000000000040 R08: 0000000000000000 R09: ffffffff868686e7 R10: fffffbfff0d0d0dc R11: 0000000000000001 R12: ffff88804e68b480 R13: ffff88804e68be68 R14: 0000000000000004 R15: 0000000000000001 FS: 00007fcc206ca700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d432000 CR3: 000000004bf74000 CR4: 0000000000350ee0 Call Trace: lock_acquire kernel/locking/lockdep.c:5566 [inline] lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5531 seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline] ktime_get+0x7f/0x1f0 kernel/time/timekeeping.c:833 clockevents_program_event+0x14b/0x360 kernel/time/clockevents.c:326 tick_program_event+0xa0/0x140 kernel/time/tick-oneshot.c:44 hrtimer_interrupt+0x3e1/0x9b0 kernel/time/hrtimer.c:1725 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1083 [inline] __sysvec_apic_timer_interrupt+0xfb/0x310 arch/x86/kernel/apic/apic.c:1100 asm_call_irq_on_stack+0x12/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0x7f/0xa0 arch/x86/kernel/apic/apic.c:1094 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:cache_vmstat_idx mm/slab.h:208 [inline] RIP: 0010:memcg_slab_free_hook mm/slab.h:383 [inline] RIP: 0010:memcg_slab_free_hook mm/slab.h:351 [inline] RIP: 0010:do_slab_free mm/slub.c:3105 [inline] RIP: 0010:___cache_free+0x122/0x360 mm/slub.c:3156 Code: 48 83 c6 08 e8 df 83 02 00 49 8b 45 00 45 2b 7e 18 41 f6 46 0a 02 41 0f 94 c6 48 c1 e8 3a 45 0f b6 f6 4c 8b 2c c5 a0 5c 67 85 <41> 83 c6 05 65 ff 05 d3 12 96 7e 68 24 5c 6c 81 31 d2 45 31 c9 45 RSP: 0018:ffff88804e567910 EFLAGS: 00000256 RAX: 0000000000000000 RBX: ffff8880196f0280 RCX: 1ffffffff0d1277a RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff816e4e48 RBP: ffff888008d66680 R08: 0000000000000001 R09: ffffffff86868757 R10: fffffbfff0d0d0ea R11: 0000000000000001 R12: ffff888008801280 R13: ffff88807ffdc000 R14: 0000000000000001 R15: 00000000fffffd78 qlink_free mm/kasan/quarantine.c:151 [inline] qlist_free_all+0x59/0xe0 mm/kasan/quarantine.c:170 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x310 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x159/0x310 mm/slub.c:2909 anon_vma_chain_alloc mm/rmap.c:137 [inline] anon_vma_fork+0x1ff/0x640 mm/rmap.c:359 dup_mmap kernel/fork.c:552 [inline] dup_mm kernel/fork.c:1380 [inline] copy_mm kernel/fork.c:1436 [inline] copy_process+0x7218/0x7800 kernel/fork.c:2126 kernel_clone+0xe7/0x980 kernel/fork.c:2506 __do_sys_fork+0x8a/0xc0 kernel/fork.c:2569 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fcc23154b19 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:00007fcc206ca188 EFLAGS: 00000246 ORIG_RAX: 0000000000000039 RAX: ffffffffffffffda RBX: 00007fcc23267f60 RCX: 00007fcc23154b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fcc231aef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd41fe1af R14: 00007fcc206ca300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 38 00 cmp %al,(%rax) 2: 0f 1f 00 nopl (%rax) 5: 55 push %rbp 6: 48 89 fd mov %rdi,%rbp 9: 48 83 c7 18 add $0x18,%rdi d: 53 push %rbx e: 48 89 f3 mov %rsi,%rbx 11: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 16: e8 9a a1 3f fd callq 0xfd3fa1b5 1b: 48 89 ef mov %rbp,%rdi 1e: e8 62 5b 40 fd callq 0xfd405b85 23: f6 c7 02 test $0x2,%bh 26: 75 10 jne 0x38 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d 34 de 1a 7c decl %gs:0x7c1ade34(%rip) # 0x7c1ade65 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: e9 ad ae 38 00 jmpq 0x38aee5 38: e8 a8 7c 5f fd callq 0xfd5f7ce5 3d: eb e9 jmp 0x28 3f: 66 data16