watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.3:4744] Modules linked in: irq event stamp: 4671237 hardirqs last enabled at (4671236): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4671237): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (4630964): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4630967): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4744 Comm: syz-executor.3 Not tainted 5.10.224 #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 1a a4 3f fd 48 89 ef e8 e2 5d 40 fd f6 c7 02 75 10 53 9d <65> ff 0d c4 e0 1a 7c 5b 5d e9 3d b1 38 00 e8 38 85 5f fd eb e9 66 RSP: 0018:ffff88806ce09aa0 EFLAGS: 00000246 RAX: 0000000000474700 RBX: 0000000000000246 RCX: 1ffffffff0d16602 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e78e88 RBP: ffffffff850a6640 R08: 0000000000000001 R09: ffffffff868687a7 R10: fffffbfff0d0d0f4 R11: 0000000000000001 R12: 0000000000000a20 R13: 0000000000000a20 R14: 00000000ffffffff R15: 0000000000000000 FS: 00007f9dffce0700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a8afa4e4c8 CR3: 0000000045f46000 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:1584 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1648 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1665 __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:on_stack arch/x86/include/asm/stacktrace.h:50 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:347 [inline] RIP: 0010:deref_stack_reg+0x38/0x160 arch/x86/kernel/unwind_orc.c:357 Code: 49 89 fc 55 48 89 f5 53 48 89 d3 48 89 fa 48 c1 ea 03 48 83 ec 08 0f b6 04 02 84 c0 74 08 3c 03 0f 8e df 00 00 00 41 8b 04 24 <85> c0 74 62 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 08 48 89 fa RSP: 0018:ffff88804701efd0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88804701f118 RCX: ffffffff85a33f20 RDX: 1ffff11008e03e1b RSI: ffff88804701f508 RDI: ffff88804701f0d8 RBP: ffff88804701f508 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff11008e03e08 R12: ffff88804701f0d8 R13: ffff88804701f0d8 R14: 1ffff11008e03e08 R15: ffffffff85a33f24 unwind_next_frame+0x1289/0x1a90 arch/x86/kernel/unwind_orc.c:589 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x110/0x160 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1542 [inline] slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kmem_cache_free+0xa7/0x2d0 mm/slub.c:3165 free_buffer_head+0x42/0xa0 fs/buffer.c:3352 try_to_free_buffers+0x235/0x3e0 fs/buffer.c:3266 try_to_release_page+0x1e9/0x270 mm/filemap.c:3533 block_invalidatepage+0x445/0x4c0 fs/buffer.c:1544 do_invalidatepage mm/truncate.c:163 [inline] truncate_cleanup_page+0x205/0x2a0 mm/truncate.c:182 truncate_inode_pages_range+0x4bc/0x1290 mm/truncate.c:362 truncate_inode_pages mm/truncate.c:473 [inline] truncate_pagecache+0x63/0x90 mm/truncate.c:834 fat_setattr+0xbb2/0xf50 fs/fat/file.c:536 notify_change+0xc28/0x1160 fs/attr.c:410 do_truncate+0x134/0x1f0 fs/open.c:64 handle_truncate fs/namei.c:2970 [inline] do_open fs/namei.c:3311 [inline] path_openat+0x1dcd/0x2770 fs/namei.c:3425 do_filp_open+0x190/0x3e0 fs/namei.c:3452 do_sys_openat2+0x171/0x4d0 fs/open.c:1227 do_sys_open fs/open.c:1243 [inline] __do_sys_creat fs/open.c:1317 [inline] __se_sys_creat fs/open.c:1311 [inline] __x64_sys_creat+0xc9/0x120 fs/open.c:1311 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f9e0276ab19 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:00007f9dffce0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f9e0287df60 RCX: 00007f9e0276ab19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f9e027c4f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe36709a6f R14: 00007f9dffce0300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 117 Comm: systemd-udevd Not tainted 5.10.224 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:mark_lock+0x139/0x2df0 kernel/locking/lockdep.c:4511 Code: 00 8b 86 86 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 50 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 df 1f 00 00 4c 89 f8 49 23 45 50 <0f> 84 40 08 00 00 41 bd 01 00 00 00 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffff888016f074e8 EFLAGS: 00000002 RAX: 0000000000000004 RBX: 1ffff11002de0ea4 RCX: 1ffffffff0d118f2 RDX: fffffbfff0d0d0e8 RSI: 0000000000000008 RDI: ffffffff8688c790 RBP: 0000000000000002 R08: 0000000000000000 R09: ffffffff8686873f R10: fffffbfff0d0d0e7 R11: 0000000000000001 R12: ffff88800b3d3e68 R13: ffffffff8688c740 R14: ffff88800b3d3e88 R15: 0000000000000004 FS: 00007f51631cb8c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a8afa4ddd8 CR3: 000000000d104000 CR4: 0000000000350ee0 Call Trace: mark_usage kernel/locking/lockdep.c:4442 [inline] __lock_acquire+0x82b/0x5b00 kernel/locking/lockdep.c:4909 lock_acquire kernel/locking/lockdep.c:5566 [inline] lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5531 _raw_spin_lock_nested+0x25/0x30 kernel/locking/spinlock.c:361 copy_pte_range mm/memory.c:959 [inline] copy_pmd_range mm/memory.c:1070 [inline] copy_pud_range mm/memory.c:1107 [inline] copy_p4d_range mm/memory.c:1131 [inline] copy_page_range+0xe96/0x3810 mm/memory.c:1204 dup_mmap kernel/fork.c:596 [inline] dup_mm kernel/fork.c:1380 [inline] copy_mm kernel/fork.c:1436 [inline] copy_process+0x759b/0x7800 kernel/fork.c:2126 kernel_clone+0xe7/0x980 kernel/fork.c:2506 __do_sys_clone+0xc8/0x110 kernel/fork.c:2623 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f51636574bb Code: ed 0f 85 f8 00 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 41 89 c5 85 c0 0f 85 9e 00 00 RSP: 002b:00007fff7e52d580 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f51636574bb RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f51631cb8c0 R10: 00007f51631cbb90 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff7e52d650 R14: 0000000000000000 R15: 0000000000000000 ---------------- 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 1a a4 3f fd callq 0xfd3fa435 1b: 48 89 ef mov %rbp,%rdi 1e: e8 e2 5d 40 fd callq 0xfd405e05 23: f6 c7 02 test $0x2,%bh 26: 75 10 jne 0x38 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d c4 e0 1a 7c decl %gs:0x7c1ae0c4(%rip) # 0x7c1ae0f5 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: e9 3d b1 38 00 jmpq 0x38b175 38: e8 38 85 5f fd callq 0xfd5f8575 3d: eb e9 jmp 0x28 3f: 66 data16