syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz-executor4:6660]
Modules linked in:
CPU: 0 PID: 6660 Comm: syz-executor4 Not tainted 4.19.0-rc1+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lowmem_page_address include/linux/mm.h:1158 [inline]
RIP: 0010:msan_get_shadow_origin_ptr+0x1f9/0x2e0 mm/kmsan/kmsan_instr.c:314
Code: 05 48 be 00 b0 aa aa aa aa aa aa 48 0f af c6 4c 09 e8 48 01 d0 74 6d 41 81 e7 fc 0f 00 00 48 03 4f 48 48 c1 e9 05 48 0f af ce <48> 01 d1 49 89 c6 4c 01 f9 48 89 cb 75 4c 0f 0b eb fe 4c 89 ff e8
RSP: 0018:ffff88012a21f8f0 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13
RAX: ffff88012a22f9d8 RBX: ffffffff8a544000 RCX: 000000012832f000
RDX: ffff880000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0006fccba0
RBP: ffff88012a21f940 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff81179950 R12: 0000000000000004
R13: 00000000000009d8 R14: ffffffff8a543000 R15: 00000000000009d8
FS:  0000000000e7f940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020400000 CR3: 00000001a4e6a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:349
 csd_lock_wait kernel/smp.c:108 [inline]
 smp_call_function_single+0x373/0x4e0 kernel/smp.c:302
 task_function_call kernel/events/core.c:115 [inline]
 event_function_call+0x2cb/0x6f0 kernel/events/core.c:277
 perf_remove_from_context kernel/events/core.c:2105 [inline]
 perf_event_release_kernel+0x7d6/0x19e0 kernel/events/core.c:4560
 perf_release+0x5d/0x90 kernel/events/core.c:4647
 __fput+0x4cf/0xc20 fs/file_table.c:278
 ____fput+0x37/0x40 fs/file_table.c:309
 task_work_run+0x22e/0x2b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:166 [inline]
 prepare_exit_to_usermode+0x33e/0x410 arch/x86/entry/common.c:197
 syscall_return_slowpath+0xdb/0x700 arch/x86/entry/common.c:268
 do_syscall_64+0xde/0x100 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x410c51
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:0000000000a3fdc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000410c51
RDX: 0000000000000000 RSI: 0000000000732fa0 RDI: 0000000000000006
RBP: 0000000000000000 R08: 0000000000000140 R09: ffffffffffffffff
R10: 00000000009301e0 R11: 0000000000000293 R12: 0000000000000000
R13: 000000000003337f R14: 0000000000000007 R15: badc0ffeebadface
Sending NMI from CPU 0 to CPUs 1:
------------[ cut here ]------------
kernel BUG at mm/kmsan/kmsan_entry.c:81!
invalid opcode: 0000 [#1] SMP PTI
CPU: 1 PID: 6661 Comm: syz-executor4 Not tainted 4.19.0-rc1+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kmsan_nmi_enter+0x42/0x70 mm/kmsan/kmsan_entry.c:80
Code: 00 74 27 65 8b 04 25 40 92 03 00 83 c0 01 83 f8 08 7d 27 65 89 04 25 40 92 03 00 65 c6 04 25 d5 6f 0b 00 ff c3 0f 0b 90 eb fe <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b 66 90 66 2e
RSP: 0018:fffffe0000049ea8 EFLAGS: 00010046
RAX: 0000000000000200 RBX: 0000000000000001 RCX: 00000000c0000101
RDX: 00000000ffff8802 RSI: ffffffff8900136c RDI: ffffffff8a545000
RBP: fffffe0000049ef9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 00000001a4e6a000 R15: 0000000000000000
FS:  00007f086caed700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff8cac94d9 CR3: 00000001a4e6a000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 8966a2b27dad929e ]---
RIP: 0010:kmsan_nmi_enter+0x42/0x70 mm/kmsan/kmsan_entry.c:80
Code: 00 74 27 65 8b 04 25 40 92 03 00 83 c0 01 83 f8 08 7d 27 65 89 04 25 40 92 03 00 65 c6 04 25 d5 6f 0b 00 ff c3 0f 0b 90 eb fe <0f> 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 eb fe 0f 0b 66 90 66 2e
RSP: 0018:fffffe0000049ea8 EFLAGS: 00010046
RAX: 0000000000000200 RBX: 0000000000000001 RCX: 00000000c0000101
RDX: 00000000ffff8802 RSI: ffffffff8900136c RDI: ffffffff8a545000
RBP: fffffe0000049ef9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 00000001a4e6a000 R15: 0000000000000000
FS:  00007f086caed700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff8cac94d9 CR3: 00000001a4e6a000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400