watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.2:24016] Modules linked in: irq event stamp: 2815300 hardirqs last enabled at (2815299): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2815300): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (20002): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (18147): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (18147): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 24016 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3a6/0xae0 kernel/locking/qspinlock.c:474 Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 38 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f RSP: 0018:ffff888052387380 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffffffff1479ff4 RDX: 0000000000000001 RSI: ffffffff8167a995 RDI: 0000000000000286 RBP: ffffffff8a3cffa0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003a21 R13: fffffbfff1479ff4 R14: 0000000000000001 R15: ffff8880ba12be00 FS: 00007fb26ad01700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557e6e7f68e0 CR3: 00000000a325f000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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] proc_keys_start+0x4d/0x450 security/keys/proc.c:123 seq_read+0x2a0/0x11c0 fs/seq_file.c:227 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb26c38c059 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb26ad01168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fb26c49ef60 RCX: 00007fb26c38c059 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000006 RBP: 00007fb26c3e608d R08: 0000000000000000 R09: 0000000000000000 R10: 000000007ffff06c R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe5988133f R14: 00007fb26ad01300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 24023 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:apic_timer_interrupt+0x0/0x20 arch/x86/entry/entry_64.S:894 Code: 31 ff fc e8 b8 28 e0 f8 48 89 e7 e8 0a 68 e0 f8 e8 8f 28 e0 f8 e9 85 f5 ff ff c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <68> 13 ff ff ff e8 46 f4 ff ff e8 01 2a 00 00 e9 2b f5 ff ff 66 66 RSP: 0018:ffff8880ba007708 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 1ffff11017400eef RCX: 0000000000000000 RDX: 1ffff11017400f13 RSI: ffff8880ba0076c0 RDI: ffff8880ba007fb8 RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba0078bf R11: 0000000000074071 R12: ffff8880ba007fc8 R13: ffff8880ba007895 R14: ffff8880ba007860 R15: ffffffff8b912364 FS: 00007fa10082c700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000097098000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: RIP: 0010:unwind_next_frame+0xe6b/0x1400 arch/x86/kernel/unwind_orc.c:572 Code: c0 74 08 3c 03 0f 8e a0 03 00 00 41 39 2e 0f 85 8f 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 14 24 48 c1 ea 03 80 3c 02 00 <0f> 85 22 03 00 00 49 8d 7e 08 49 8b 6e 38 48 b8 00 00 00 00 00 fc RSP: 0018:ffff8880ba007730 EFLAGS: 00000246 __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 kmem_cache_alloc_node+0x146/0x3b0 mm/slab.c:3649 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 __netdev_alloc_skb+0x76/0x460 net/core/skbuff.c:407 netdev_alloc_skb include/linux/skbuff.h:2680 [inline] dev_alloc_skb include/linux/skbuff.h:2693 [inline] __ieee80211_beacon_get+0xc7d/0x1a30 net/mac80211/tx.c:4352 ieee80211_beacon_get_tim+0x88/0x890 net/mac80211/tx.c:4463 ieee80211_beacon_get include/net/mac80211.h:4484 [inline] mac80211_hwsim_beacon_tx+0xff/0x680 drivers/net/wireless/mac80211_hwsim.c:1577 __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:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:write_comp_data+0x6/0x70 kernel/kcov.c:121 Code: 00 00 8b 80 64 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 49 89 f1 49 89 fa <65> 48 8b 34 25 c0 df 01 00 65 8b 05 7a 59 9f 7e a9 00 01 1f 00 75 RSP: 0018:ffff88809cb37048 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 000000000000000a RCX: ffffffff87f019b4 RDX: 0000000000000078 RSI: 0000000000000078 RDI: 0000000000000001 RBP: ffffffff89716760 R08: 000000000000002d R09: 0000000000000078 R10: 0000000000000001 R11: 00000000a8d13532 R12: 0000000000000001 R13: 000000000000000a R14: 1ffff11013966e12 R15: 0000000000000001 __sanitizer_cov_trace_switch+0x4b/0x80 kernel/kcov.c:224 format_decode+0x3a4/0xad0 lib/vsprintf.c:2130 vsnprintf+0x155/0x14f0 lib/vsprintf.c:2271 seq_vprintf fs/seq_file.c:394 [inline] seq_printf+0x195/0x240 fs/seq_file.c:409 proc_keys_show+0x783/0xbf0 security/keys/proc.c:228 seq_read+0xc22/0x11c0 fs/seq_file.c:271 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa101eb7059 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa10082c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fa101fc9f60 RCX: 00007fa101eb7059 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000006 RBP: 00007fa101f1108d R08: 0000000000000000 R09: 0000000000000000 R10: 000000007ffff06c R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff58a463ef R14: 00007fa10082c300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: eb c6 jmp 0xffffffc8 2: 45 01 01 add %r8d,(%r9) 5: 41 bc 00 80 00 00 mov $0x8000,%r12d b: 48 c1 e9 03 shr $0x3,%rcx f: 83 e3 07 and $0x7,%ebx 12: 41 be 01 00 00 00 mov $0x1,%r14d 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 4c 8d 2c 01 lea (%rcx,%rax,1),%r13 26: eb 0c jmp 0x34 28: f3 90 pause * 2a: 41 83 ec 01 sub $0x1,%r12d <-- trapping instruction 2e: 0f 84 38 04 00 00 je 0x46c 34: 41 0f b6 45 00 movzbl 0x0(%r13),%eax 39: 38 d8 cmp %bl,%al 3b: 7f 08 jg 0x45 3d: 84 c0 test %al,%al 3f: 0f .byte 0xf