BUG: unable to handle page fault for address: ffffff888018ea20
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD c691067 P4D c691067 PUD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4513 Comm: syz.0.16 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:end_of_stack include/linux/sched/task_stack.h:32 [inline]
RIP: 0010:schedule_debug kernel/sched/core.c:5802 [inline]
RIP: 0010:__schedule+0x124/0x40d0 kernel/sched/core.c:6454
Code: 5c 24 40 4c 8b 23 49 8d 5c 24 20 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 dc 6e ba f7 <48> 8b 1b 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c
RSP: 0018:ffffc900037676c0 EFLAGS: 00010246
RAX: 1ffffff110031d44 RBX: ffffff888018ea20 RCX: dffffc0000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900037677f0
RBP: ffffc90003767850 R08: dffffc0000000000 R09: ffffc900037677e0
R10: fffff520006ecefe R11: 1ffff920006ecefc R12: ffffff888018ea00
R13: ffff8880b8f00000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007f2f7f77c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffff888018ea20 CR3: 0000000078358000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_timeout+0x97/0x280 kernel/time/timer.c:1941
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x2b9/0x590 kernel/sched/completion.c:138
rdmsr_safe_on_cpu+0x139/0x210 arch/x86/lib/msr-smp.c:183
msr_read+0x10a/0x1b0 arch/x86/kernel/msr.c:67
vfs_read+0x2c0/0x920 fs/read_write.c:468
ksys_read+0x143/0x240 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2f7e98e929
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2f7f77c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f2f7ebb5fa0 RCX: 00007f2f7e98e929
RDX: 0000000000018ff8 RSI: 0000200000019680 RDI: 0000000000000005
RBP: 00007f2f7ea10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2f7ebb5fa0 R15: 00007ffc87ada948
</TASK>
Modules linked in:
CR2: ffffff888018ea20
---[ end trace 0000000000000000 ]---
RIP: 0010:end_of_stack include/linux/sched/task_stack.h:32 [inline]
RIP: 0010:schedule_debug kernel/sched/core.c:5802 [inline]
RIP: 0010:__schedule+0x124/0x40d0 kernel/sched/core.c:6454
Code: 5c 24 40 4c 8b 23 49 8d 5c 24 20 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 dc 6e ba f7 <48> 8b 1b 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c
RSP: 0018:ffffc900037676c0 EFLAGS: 00010246
RAX: 1ffffff110031d44 RBX: ffffff888018ea20 RCX: dffffc0000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900037677f0
RBP: ffffc90003767850 R08: dffffc0000000000 R09: ffffc900037677e0
R10: fffff520006ecefe R11: 1ffff920006ecefc R12: ffffff888018ea00
R13: ffff8880b8f00000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007f2f7f77c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffff888018ea20 CR3: 0000000078358000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 5c pop %rsp
1: 24 40 and $0x40,%al
3: 4c 8b 23 mov (%rbx),%r12
6: 49 8d 5c 24 20 lea 0x20(%r12),%rbx
b: 48 89 d8 mov %rbx,%rax
e: 48 c1 e8 03 shr $0x3,%rax
12: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
19: fc ff df
1c: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1)
20: 74 08 je 0x2a
22: 48 89 df mov %rbx,%rdi
25: e8 dc 6e ba f7 call 0xf7ba6f06
* 2a: 48 8b 1b mov (%rbx),%rbx <-- trapping instruction
2d: 48 89 d8 mov %rbx,%rax
30: 48 c1 e8 03 shr $0x3,%rax
34: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
3b: fc ff df
3e: 80 .byte 0x80
3f: 3c .byte 0x3c