------------[ cut here ]------------
WARNING: CPU: 1 PID: 8654 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 8654 Comm: syz.5.1125 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 dd 99 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 60 96 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000dd0918 EFLAGS: 00010006
RAX: ffffffff81a05c40 RBX: 0000000000000008 RCX: ffff88807ebed940
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807ebed947 R09: 1ffff1100fd7db28
R10: dffffc0000000000 R11: ffffed100fd7db29 R12: ffff88807ebef0c8
R13: 00007ffffffff000 R14: ffffc90000dd0988 R15: 0000000000000000
FS: 00007fd4f42a76c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000024427000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_608ee16c0de75e57+0x35/0x788
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
bpf_overflow_handler+0x1c2/0x4a0 kernel/events/core.c:10297
__perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515
perf_swevent_hrtimer+0x3c2/0x550 kernel/events/core.c:10934
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4b0/0xb60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x397/0x8b0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:finish_lock_switch+0x12f/0x290 kernel/sched/core.c:4804
Code: 83 c7 18 be ff ff ff ff e8 fe 8c 65 08 85 c0 74 46 4d 85 ff 75 62 0f 1f 44 00 00 48 89 df e8 28 f7 6e 08 e8 83 ce 2a 00 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 2f 0e fe ff 43 80 3c 2c
RSP: 0018:ffffc900013ff778 EFLAGS: 00000282
RAX: 43a7aa0f7e421500 RBX: ffff88805e053b80 RCX: 43a7aa0f7e421500
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: 1ffff11017227613 R08: ffff8880b913a343 R09: 1ffff11017227468
R10: dffffc0000000000 R11: ffffed1017227469 R12: 1ffff110172275c1
R13: dffffc0000000000 R14: ffff8880b913ae08 R15: 0000000000000000
finish_task_switch+0x12f/0x650 kernel/sched/core.c:4921
context_switch kernel/sched/core.c:5052 [inline]
__schedule+0x11cb/0x4350 kernel/sched/core.c:6395
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6571
preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6596
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
try_to_wake_up+0x6cc/0x1020 kernel/sched/core.c:4171
wake_up_process kernel/sched/core.c:4234 [inline]
wake_up_q+0x78/0xc0 kernel/sched/core.c:953
futex_wake+0x4a9/0x540 kernel/futex/core.c:1702
do_futex+0xd83/0x12b0 kernel/futex/core.c:3988
__do_sys_futex kernel/futex/core.c:4060 [inline]
__se_sys_futex+0x389/0x420 kernel/futex/core.c:4041
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd4f604de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd4f42a70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fd4f62c6fa8 RCX: 00007fd4f604de59
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fd4f62c6fac
RBP: 00007fd4f62c6fa0 R08: 00022d3c57367250 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd4f62c7038 R14: 00007ffc06cc6480 R15: 00007ffc06cc6568
----------------
Code disassembly (best guess):
0: 83 c7 18 add $0x18,%edi
3: be ff ff ff ff mov $0xffffffff,%esi
8: e8 fe 8c 65 08 call 0x8658d0b
d: 85 c0 test %eax,%eax
f: 74 46 je 0x57
11: 4d 85 ff test %r15,%r15
14: 75 62 jne 0x78
16: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1b: 48 89 df mov %rbx,%rdi
1e: e8 28 f7 6e 08 call 0x86ef74b
23: e8 83 ce 2a 00 call 0x2aceab
28: fb sti
29: 5b pop %rbx
* 2a: 41 5c pop %r12 <-- trapping instruction
2c: 41 5d pop %r13
2e: 41 5e pop %r14
30: 41 5f pop %r15
32: 5d pop %rbp
33: c3 ret
34: 48 89 df mov %rbx,%rdi
37: e8 2f 0e fe ff call 0xfffe0e6b
3c: 43 rex.XB
3d: 80 .byte 0x80
3e: 3c 2c cmp $0x2c,%al