watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:15777] Modules linked in: irq event stamp: 19969860 hardirqs last enabled at (19969859): [] kvm_wait arch/x86/kernel/kvm.c:799 [inline] hardirqs last enabled at (19969859): [] kvm_wait+0x14b/0x240 arch/x86/kernel/kvm.c:779 hardirqs last disabled at (19969860): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (19969840): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (19969807): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (19969807): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 15777 Comm: syz-executor.4 Not tainted 4.19.208-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 Code: 48 89 df e8 34 3a 7f f9 e9 2e ff ff ff 48 89 df e8 27 3a 7f f9 eb 82 90 90 90 90 90 e9 07 00 00 00 0f 00 2d a4 5f 4e 00 fb f4 90 e9 07 00 00 00 0f 00 2d 94 5f 4e 00 f4 c3 90 90 41 56 41 55 RSP: 0018:ffff888047d0f648 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3054 RBX: ffff8882350f0b00 RCX: 1ffff11007414d29 RDX: dffffc0000000000 RSI: ffff88803a0a6928 RDI: ffff88803a0a6884 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 R13: ffffed1046a1e160 R14: 0000000000000001 R15: ffff8880ba02be00 FS: 000055555567f400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555688848 CR3: 00000000481fc000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] kvm_wait arch/x86/kernel/kvm.c:799 [inline] kvm_wait+0x179/0x240 arch/x86/kernel/kvm.c:779 pv_wait arch/x86/include/asm/paravirt.h:689 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:471 [inline] __pv_queued_spin_lock_slowpath+0x86a/0xae0 kernel/locking/qspinlock.c:474 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:679 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:53 [inline] queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] do_raw_spin_lock+0x189/0x220 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:329 [inline] ext4_lock_group fs/ext4/ext4.h:3022 [inline] ext4_free_blocks+0x1bc8/0x2ac0 fs/ext4/mballoc.c:4931 ext4_remove_blocks fs/ext4/extents.c:2584 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2740 [inline] ext4_ext_remove_space+0x26ef/0x3e80 fs/ext4/extents.c:2973 ext4_ext_truncate+0x1ae/0x200 fs/ext4/extents.c:4670 ext4_truncate+0xe27/0x1380 fs/ext4/inode.c:4557 ext4_evict_inode+0x934/0x17b0 fs/ext4/inode.c:305 evict+0x2ed/0x760 fs/inode.c:559 iput_final fs/inode.c:1555 [inline] iput+0x4f1/0x860 fs/inode.c:1581 dentry_unlink_inode+0x265/0x320 fs/dcache.c:374 d_delete+0x210/0x280 fs/dcache.c:2372 vfs_rmdir.part.0+0x28a/0x3d0 fs/namei.c:3895 vfs_rmdir fs/namei.c:3868 [inline] do_rmdir+0x3fd/0x490 fs/namei.c:3943 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5b48adc247 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 54 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:00007ffe79de6078 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f5b48adc247 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe79de7200 RBP: 00007ffe79de6140 R08: 0000000000000000 R09: 00007ffe79de5f10 R10: 00005555556808c3 R11: 0000000000000207 R12: 00007f5b48b35e80 R13: 00007ffe79de7200 R14: 0000555555680810 R15: 00007ffe79de7240 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16898 Comm: kworker/1:0 Not tainted 4.19.208-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events cache_reap RIP: 0010:unwind_next_frame+0x7c7/0x1400 arch/x86/kernel/unwind_orc.c:492 Code: f7 0f 85 59 09 00 00 83 e0 07 38 c2 40 0f 9e c6 84 d2 0f 95 c0 40 84 c6 0f 85 42 09 00 00 49 0f bf 07 48 01 c8 48 89 44 24 68 a8 fe ff ff 49 8d 7e 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa RSP: 0018:ffff8880ba107758 EFLAGS: 00000292 RAX: ffff888045acfd40 RBX: 1ffff11017420ef4 RCX: ffff888045acfce8 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff8b99d4ec R09: ffffffff8b99d4e8 R10: ffff8880ba1078e7 R11: 0000000000074071 R12: ffff8880ba1078d0 R13: ffff8880ba1078bd R14: ffff8880ba107888 R15: ffffffff8b99d4e8 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555557530708 CR3: 000000008f748000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slab.c:3340 [inline] kmem_cache_alloc_node+0x133/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 skb_copy+0x139/0x2f0 net/core/skbuff.c:1358 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb8a/0x1330 drivers/net/wireless/mac80211_hwsim.c:1353 mac80211_hwsim_tx_frame+0x12b/0x210 drivers/net/wireless/mac80211_hwsim.c:1556 mac80211_hwsim_beacon_tx+0x3f8/0x680 drivers/net/wireless/mac80211_hwsim.c:1595 __iterate_interfaces+0x2e1/0x4a0 net/mac80211/util.c:614 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:650 mac80211_hwsim_beacon+0xc9/0x190 drivers/net/wireless/mac80211_hwsim.c:1615 __tasklet_hrtimer_trampoline+0x29/0xa0 kernel/softirq.c:601 tasklet_action_common.constprop.0+0x265/0x360 kernel/softirq.c:522 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:drain_array+0x2e/0xa0 mm/slab.c:4018 Code: 41 54 55 48 83 ec 18 65 48 8b 04 25 28 00 00 00 48 89 44 24 10 31 c0 48 85 d2 48 89 24 24 48 89 64 24 08 74 17 48 89 d5 8b 12 <85> d2 74 0e 8b 45 0c 85 c0 74 23 c7 45 0c 00 00 00 00 48 8b 44 24 RSP: 0018:ffff888045acfca8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffffe8ffffdb53c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880a3fbd100 RDI: ffff8880a46bb080 RBP: ffffe8ffffdb53c0 R08: 00000000362e84f9 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880a46bb080 R13: 0000000000000000 R14: 0000000000000020 R15: ffff8880ba1284a0 cache_reap+0x150/0x270 mm/slab.c:4068 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ---------------- Code disassembly (best guess): 0: 48 89 df mov %rbx,%rdi 3: e8 34 3a 7f f9 callq 0xf97f3a3c 8: e9 2e ff ff ff jmpq 0xffffff3b d: 48 89 df mov %rbx,%rdi 10: e8 27 3a 7f f9 callq 0xf97f3a3c 15: eb 82 jmp 0xffffff99 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: e9 07 00 00 00 jmpq 0x28 21: 0f 00 2d a4 5f 4e 00 verw 0x4e5fa4(%rip) # 0x4e5fcc 28: fb sti 29: f4 hlt * 2a: c3 retq <-- trapping instruction 2b: 90 nop 2c: e9 07 00 00 00 jmpq 0x38 31: 0f 00 2d 94 5f 4e 00 verw 0x4e5f94(%rip) # 0x4e5fcc 38: f4 hlt 39: c3 retq 3a: 90 nop 3b: 90 nop 3c: 41 56 push %r14 3e: 41 55 push %r13