watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz-executor.0:31819] Modules linked in: irq event stamp: 14884973 hardirqs last enabled at (14884972): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 hardirqs last disabled at (14884973): [] sysvec_apic_timer_interrupt+0xa/0xb0 arch/x86/kernel/apic/apic.c:1100 softirqs last enabled at (13883048): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (13883048): [] __irq_exit_rcu+0x21b/0x260 kernel/softirq.c:636 softirqs last disabled at (13883051): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (13883051): [] __irq_exit_rcu+0x21b/0x260 kernel/softirq.c:636 CPU: 1 PID: 31819 Comm: syz-executor.0 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:48 [inline] RIP: 0010:__unwind_start+0x59e/0x750 arch/x86/kernel/unwind_orc.c:697 Code: 4c 89 ff e8 a4 ee 90 00 4d 8b 2f 48 b8 00 00 00 00 00 fc ff df 41 80 3c 04 00 74 0a 48 8b 7c 24 28 e8 86 ee 90 00 49 8b 5e 10 <48> b8 00 00 00 00 00 fc ff df 0f b6 44 05 00 84 c0 75 7c 48 3b 5c RSP: 0018:ffffc90000dc03f8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc90000dc1000 RCX: 1ffff920001b808d RDX: ffffc90000dc1000 RSI: 0000000000000102 RDI: 0000000000000000 RBP: 1ffff920001b808c R08: dffffc0000000000 R09: ffffc90000dc0460 R10: fffff520001b8098 R11: 0000000000000000 R12: 1ffff920001b808e R13: ffffc90000db9000 R14: ffffc90000dc0460 R15: ffffc90000dc0468 FS: 00007f1d28d81700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f14eaa31718 CR3: 0000000073118000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x76/0xe0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x104/0x1e0 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x96/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:2956 [inline] kmem_cache_alloc_node+0x200/0x370 mm/slub.c:2992 __alloc_skb+0xd8/0x580 net/core/skbuff.c:414 skb_copy+0xe8/0x750 net/core/skbuff.c:1581 mac80211_hwsim_tx_frame_no_nl+0xe0c/0x1980 drivers/net/wireless/mac80211_hwsim.c:1565 mac80211_hwsim_tx_frame+0x1cb/0x220 drivers/net/wireless/mac80211_hwsim.c:1784 mac80211_hwsim_beacon_tx+0x46c/0x890 drivers/net/wireless/mac80211_hwsim.c:1838 __iterate_interfaces+0x23e/0x480 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x9b/0x120 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xa5/0x160 drivers/net/wireless/mac80211_hwsim.c:1861 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x176/0x1e0 kernel/time/hrtimer.c:1618 __do_softirq+0x372/0x783 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x21b/0x260 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_schedule_irq+0xde/0x190 kernel/sched/core.c:6326 Code: 14 66 66 2e 0f 1f 84 00 00 00 00 00 48 f7 03 08 00 00 00 74 7b bf 01 00 00 00 e8 cd 6a 7c f7 e8 28 77 ab f7 fb bf 01 00 00 00 9d e6 ff ff 9c 8f 44 24 20 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 RSP: 0018:ffffc9000983f1e0 EFLAGS: 00000282 RAX: 0fc40b78dfcbeb00 RBX: 0000000000000000 RCX: ffffffff8162c8d9 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffc9000983f298 R08: dffffc0000000000 R09: fffffbfff1f5e7c0 R10: fffffbfff1f5e7c0 R11: 0000000000000000 R12: 1ffff92001307e3c R13: 1ffff92001307e40 R14: ffffc9000983f200 R15: dffffc0000000000 irqentry_exit+0x56/0x90 kernel/entry/common.c:427 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__kasan_check_write+0x0/0x10 mm/kasan/shadow.c:37 Code: 4c 89 fe 31 c0 e8 78 90 9c ff eb d3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 89 f6 48 8b 0c 24 31 d2 e9 f3 ee ff ff 0f 1f 00 <89> f6 48 8b 0c 24 ba 01 00 00 00 e9 e0 ee ff ff 55 41 56 53 48 89 RSP: 0018:ffffc9000983f368 EFLAGS: 00000206 RAX: 0000000000000002 RBX: ffffea0000f1a274 RCX: dffffc0000000000 RDX: ffff888019a30000 RSI: 0000000000000004 RDI: ffffea0000f1a274 RBP: 0000000000000003 R08: ffffffff81e4c47c R09: fffff940001e344f R10: fffff940001e344f R11: 0000000000000000 R12: ffffea0000f1a248 R13: 000000000000038f R14: ffffea0000f1a240 R15: ffff888036b20488 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_dec_and_test include/asm-generic/atomic-instrumented.h:542 [inline] page_ref_dec_and_test include/linux/page_ref.h:148 [inline] put_page_testzero include/linux/mm.h:749 [inline] put_page include/linux/mm.h:1245 [inline] __find_get_block_slow+0x3f1/0x6e0 fs/buffer.c:239 __find_get_block+0x33d/0xbd0 fs/buffer.c:1308 sb_find_get_block include/linux/buffer_head.h:340 [inline] recently_deleted fs/ext4/ialloc.c:687 [inline] find_inode_bit+0x261/0x560 fs/ext4/ialloc.c:729 __ext4_new_inode+0x1282/0x5810 fs/ext4/ialloc.c:1064 ext4_create+0x27d/0x550 fs/ext4/namei.c:2738 lookup_open fs/namei.c:3228 [inline] open_last_lookups fs/namei.c:3298 [inline] path_openat+0x13b7/0x36b0 fs/namei.c:3504 do_filp_open+0x253/0x4d0 fs/namei.c:3534 do_sys_openat2+0x124/0x460 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_creat fs/open.c:1294 [inline] __se_sys_creat fs/open.c:1288 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1288 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 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:00007f1d28d81188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc001555af R14: 00007f1d28d81300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 12812 Comm: kworker/u4:7 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:kvm_wait+0x123/0x1a0 arch/x86/kernel/kvm.c:890 Code: c2 4e 00 4c 89 f8 48 c1 e8 03 42 8a 04 20 84 c0 75 74 41 8a 07 44 38 f0 75 10 e8 88 bd 4e 00 eb 07 0f 00 2d af 47 f3 08 fb f4 78 bd 4e 00 fb 48 c7 04 24 0e 36 e0 45 49 c7 04 1c 00 00 00 00 RSP: 0018:ffffc90000007760 EFLAGS: 00000286 RAX: 3d4459a7869b7700 RBX: 1ffff92000000eec RCX: ffffffff8162c8d9 RDX: dffffc0000000000 RSI: 0000000000000102 RDI: 0000000000000000 RBP: ffffc90000007810 R08: dffffc0000000000 R09: fffffbfff1f5e7c5 R10: fffffbfff1f5e7c5 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880b9c522d4 R14: 0000000000000003 R15: ffffffff8d0904c0 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00038b2bc CR3: 000000000c48e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:597 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x76c/0xcb0 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock+0x4c9/0x8e0 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:354 [inline] mac80211_hwsim_tx_frame_no_nl+0x6e6/0x1980 drivers/net/wireless/mac80211_hwsim.c:1516 mac80211_hwsim_tx_frame+0x1cb/0x220 drivers/net/wireless/mac80211_hwsim.c:1784 mac80211_hwsim_beacon_tx+0x46c/0x890 drivers/net/wireless/mac80211_hwsim.c:1838 __iterate_interfaces+0x23e/0x480 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x9b/0x120 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xa5/0x160 drivers/net/wireless/mac80211_hwsim.c:1861 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x176/0x1e0 kernel/time/hrtimer.c:1618 __do_softirq+0x372/0x783 kernel/softirq.c:558 do_softirq+0x14a/0x210 kernel/softirq.c:459 __local_bh_enable_ip+0x184/0x1c0 kernel/softirq.c:383 get_next_corpse net/netfilter/nf_conntrack_core.c:2219 [inline] nf_ct_iterate_cleanup+0x357/0x3f0 net/netfilter/nf_conntrack_core.c:2242 nf_conntrack_cleanup_net_list+0x79/0x210 net/netfilter/nf_conntrack_core.c:2436 ops_exit_list net/core/net_namespace.c:178 [inline] cleanup_net+0x7ec/0xc60 net/core/net_namespace.c:595 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276 worker_thread+0xac1/0x1320 kernel/workqueue.c:2422 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 4c 89 ff mov %r15,%rdi 3: e8 a4 ee 90 00 callq 0x90eeac 8: 4d 8b 2f mov (%r15),%r13 b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 12: fc ff df 15: 41 80 3c 04 00 cmpb $0x0,(%r12,%rax,1) 1a: 74 0a je 0x26 1c: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi 21: e8 86 ee 90 00 callq 0x90eeac 26: 49 8b 5e 10 mov 0x10(%r14),%rbx 2a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 31: fc ff df 34: 0f b6 44 05 00 movzbl 0x0(%rbp,%rax,1),%eax 39: 84 c0 test %al,%al 3b: 75 7c jne 0xb9 3d: 48 rex.W 3e: 3b .byte 0x3b 3f: 5c pop %rsp