watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor.4:6442] Modules linked in: CPU: 1 PID: 6442 Comm: syz-executor.4 Not tainted 5.4.83-syzkaller-00110-g30fc30201c19 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:pvclock_scale_delta arch/x86/include/asm/pvclock.h:68 [inline] RIP: 0010:__pvclock_read_cycles arch/x86/include/asm/pvclock.h:85 [inline] RIP: 0010:pvclock_clocksource_read+0x128/0x6b0 arch/x86/kernel/pvclock.c:76 Code: 04 20 84 c0 0f 85 b4 02 00 00 0f b6 06 89 c1 f6 d9 48 89 ea 48 d3 ea 89 c1 48 d3 e5 84 c0 48 0f 48 ea 48 89 5c 24 68 48 89 e8 <48> f7 64 24 68 48 0f ac d0 20 48 89 44 24 50 49 8d 6f 07 4c 89 f8 RSP: 0018:ffff8881a484ee58 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 00000089b2ae32e1 RBX: 00000000de9bd37a RCX: 00000000000000ff RDX: 00000089b2ae32e1 RSI: ffffffff85f3805c RDI: ffffffff85f3805d RBP: 00000089b2ae32e1 R08: ffffffff85f38048 R09: ffffffff85f38058 R10: ffffffff85f38043 R11: 1ffffffff0be7008 R12: dffffc0000000000 R13: ffffffff85f38040 R14: 0000000000000006 R15: ffffffff85f38050 FS: 00007f206724c700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000053 CR3: 00000001e4bdc000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kvm_clock_read arch/x86/kernel/kvmclock.c:90 [inline] kvm_sched_clock_read+0x15/0x40 arch/x86/kernel/kvmclock.c:102 paravirt_sched_clock arch/x86/include/asm/paravirt.h:22 [inline] sched_clock+0x36/0x40 arch/x86/kernel/tsc.c:245 sched_clock_cpu+0x18/0x3b0 kernel/sched/clock.c:371 local_clock include/linux/sched/clock.h:84 [inline] cpu_clock_event_update kernel/events/core.c:9698 [inline] cpu_clock_event_read+0x17/0x50 kernel/events/core.c:9731 perf_output_read_group kernel/events/core.c:6341 [inline] perf_output_read+0xf4f/0x1480 kernel/events/core.c:6380 perf_output_sample+0x354/0x1e20 kernel/events/core.c:6422 __perf_event_output kernel/events/core.c:6749 [inline] perf_event_output_forward+0x140/0x1b0 kernel/events/core.c:6763 __perf_event_overflow+0x1b9/0x340 kernel/events/core.c:8237 do_perf_sw_event kernel/events/core.c:8454 [inline] ___perf_sw_event+0x3bc/0x4c0 kernel/events/core.c:8485 __perf_sw_event+0x12e/0x220 kernel/events/core.c:8497 page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1203 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x30 arch/x86/lib/copy_user_64.S:205 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4 RSP: 0018:ffff8881a484f8c0 EFLAGS: 00010206 RAX: ffffffff82234001 RBX: 0000000020facfcb RCX: 0000000000000fcb RDX: 0000000000008000 RSI: 0000000020fac000 RDI: ffff888196527035 RBP: ffff888196520000 R08: dffffc0000000000 R09: ffffed1032ca5000 R10: 0000000000000000 R11: 0000000000000000 R12: 00007ffffffff000 R13: 0000000000008000 R14: 0000000020fa4fcb R15: ffff888196520000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:71 [inline] copyin+0x8e/0xb0 lib/iov_iter.c:151 _copy_from_iter_full+0x194/0x860 lib/iov_iter.c:769 copy_from_iter_full include/linux/uio.h:156 [inline] skb_do_copy_data_nocache+0x134/0x370 include/net/sock.h:2006 skb_copy_to_page_nocache include/net/sock.h:2032 [inline] tcp_sendmsg_locked+0x18ee/0x3f20 net/ipv4/tcp.c:1347 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1445 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] __sys_sendto+0x4f6/0x6c0 net/socket.c:1953 __do_sys_sendto net/socket.c:1965 [inline] __se_sys_sendto net/socket.c:1961 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:1961 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e159 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f206724bc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045e159 RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000004 RBP: 000000000119bfd8 R08: 0000000000000000 R09: 0000000000000053 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffd1ed99bff R14: 00007f206724c9c0 R15: 000000000119bf8c Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0x1f/0x30 arch/x86/kernel/process.c:572