watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor.2:23729]
Modules linked in:
CPU: 0 PID: 23729 Comm: syz-executor.2 Not tainted 5.4.161-syzkaller-00007-g2426795494c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__pvclock_read_cycles arch/x86/include/asm/pvclock.h:84 [inline]
RIP: 0010:pvclock_clocksource_read+0xa2/0x6b0 arch/x86/kernel/pvclock.c:76
Code: 85 35 01 00 00 42 0f b6 04 32 84 c0 0f 85 80 01 00 00 45 8b 65 00 0f 01 f9 66 90 48 89 c3 48 89 d5 48 c1 e5 20 48 8b 44 24 60 <42> 0f b6 04 30 84 c0 0f 85 a9 01 00 00 48 09 dd 48 8b 44 24 58 42
RSP: 0018:ffff8881e4faf458 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff0da8e01 RBX: 0000000047ab7184 RCX: 0000000000000000
RDX: 00000000000004e6 RSI: ffffffff86d4701c RDI: ffffffff86d4701d
RBP: 000004e600000000 R08: ffffffff86d47008 R09: ffffffff86d47018
R10: ffffffff86d47003 R11: 1ffffffff0da8e00 R12: 0000000000000014
R13: ffffffff86d47000 R14: dffffc0000000000 R15: ffffffff86d47010
FS:  00007f4f63dc4700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020a6e17f CR3: 00000001a1554000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kvm_clock_read arch/x86/kernel/kvmclock.c:80 [inline]
 kvm_sched_clock_read+0x15/0x40 arch/x86/kernel/kvmclock.c:92
 paravirt_sched_clock arch/x86/include/asm/paravirt.h:22 [inline]
 sched_clock+0x36/0x40 arch/x86/kernel/tsc.c:245
 sched_clock_cpu+0x18/0x390 kernel/sched/clock.c:371
 local_clock include/linux/sched/clock.h:84 [inline]
 cpu_clock_event_update kernel/events/core.c:9700 [inline]
 cpu_clock_event_read+0x17/0x50 kernel/events/core.c:9733
 perf_output_read_group kernel/events/core.c:6343 [inline]
 perf_output_read+0xde2/0x1290 kernel/events/core.c:6382
 perf_output_sample+0x2a2/0x1d40 kernel/events/core.c:6424
 __perf_event_output kernel/events/core.c:6751 [inline]
 perf_event_output_backward+0xcd/0x110 kernel/events/core.c:6773
 __perf_event_overflow+0x1b9/0x340 kernel/events/core.c:8239
 do_perf_sw_event kernel/events/core.c:8456 [inline]
 ___perf_sw_event+0x359/0x430 kernel/events/core.c:8487
 __perf_sw_event+0x12e/0x220 kernel/events/core.c:8499
 page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1203
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:604 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x209/0x5b0 lib/iov_iter.c:426
Code: 00 00 49 81 c7 00 10 00 00 4d 31 e7 bf 00 10 00 00 4c 89 fe e8 38 8e 47 ff 49 81 ff 00 10 00 00 73 4b 0f 01 cb 0f ae e8 31 ed <45> 8a 3c 24 0f 01 ca 48 b8 00 00 00 00 00 fc ff df 41 8a 04 06 84
RSP: 0018:ffff8881e4fafb40 EFLAGS: 00050246
RAX: 0000000000000002 RBX: 0000000020a6e180 RCX: 0000000000000002
RDX: ffff8881e9da4ec0 RSI: 00000000000000ff RDI: 0000000000001000
RBP: 0000000000000000 R08: ffffffff82191d58 R09: 000000000000000e
R10: ffffffff84600000 R11: 0000000000000000 R12: 0000000020a6e17f
R13: 0000000000001000 R14: 1ffff1103c9f5f6b R15: 00000000000000ff
 generic_perform_write+0x188/0x510 mm/filemap.c:3301
 __generic_file_write_iter+0x239/0x480 mm/filemap.c:3440
 ext4_file_write_iter+0x471/0x1050 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1976 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x506/0x6b0 fs/read_write.c:496
 vfs_write+0x212/0x4e0 fs/read_write.c:558
 ksys_write+0x13f/0x240 fs/read_write.c:611
 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4f64c4e059
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:00007f4f63dc4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4f64d60f60 RCX: 00007f4f64c4e059
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000006
RBP: 00007f4f64ca808d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcaf99b91f R14: 00007f4f63dc4300 R15: 0000000000022000
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0x1f/0x30 arch/x86/kernel/process.c:572
----------------
Code disassembly (best guess):
   0:	85 35 01 00 00 42    	test   %esi,0x42000001(%rip)        # 0x42000007
   6:	0f b6 04 32          	movzbl (%rdx,%rsi,1),%eax
   a:	84 c0                	test   %al,%al
   c:	0f 85 80 01 00 00    	jne    0x192
  12:	45 8b 65 00          	mov    0x0(%r13),%r12d
  16:	0f 01 f9             	rdtscp
  19:	66 90                	xchg   %ax,%ax
  1b:	48 89 c3             	mov    %rax,%rbx
  1e:	48 89 d5             	mov    %rdx,%rbp
  21:	48 c1 e5 20          	shl    $0x20,%rbp
  25:	48 8b 44 24 60       	mov    0x60(%rsp),%rax
* 2a:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 a9 01 00 00    	jne    0x1e0
  37:	48 09 dd             	or     %rbx,%rbp
  3a:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  3f:	42                   	rex.X