------------[ cut here ]------------
WARNING: CPU: 1 PID: 7281 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 7281 Comm: syz.1.946 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 ad 89 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 30 86 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: ffffffff81a08e70 RBX: 0000000000000008 RCX: ffff88805fb09dc0
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88805fb09dc7 R09: 1ffff1100bf613b8
R10: dffffc0000000000 R11: ffffed100bf613b9 R12: ffff88805fb0b568
R13: 00007ffffffff000 R14: ffffc90000dd0988 R15: 0000000020000000
FS: 00007f379a9d96c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000002b910000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 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_ceda4e53fcf21ae1+0x3e/0x674
bpf_dispatcher_nop_func include/linux/bpf.h:890 [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:10307
__perf_event_overflow+0x35f/0x550 kernel/events/core.c:9525
perf_swevent_hrtimer+0x3c2/0x550 kernel/events/core.c:10944
__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:__rcu_read_unlock+0x58/0xd0 kernel/rcu/tree_plugin.h:425
Code: 84 c0 75 48 ff 0b 75 1d 4c 8d b7 40 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 5f 41 83 3e 00 75 20 43 0f b6 04 3c <84> c0 75 3a 8b 03 3d 00 00 00 40 73 0a 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90002f0f2e0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88805fb0a1fc RCX: 0000000000080000
RDX: ffffc90004084000 RSI: 00000000000005f5 RDI: ffff88805fb09dc0
RBP: ffffc90002f0f450 R08: ffffc90002f0f3d7 R09: ffffc90002f0f3c0
R10: dffffc0000000000 R11: fffff520005e1e7b R12: 1ffff1100bf6143f
R13: ffffc90002f0f4a0 R14: dffffc0000000000 R15: dffffc0000000000
rcu_read_unlock+0x85/0x90 include/linux/rcupdate.h:772
__perf_output_begin kernel/events/ring_buffer.c:262 [inline]
perf_output_begin_forward+0x793/0xa30 kernel/events/ring_buffer.c:271
__perf_event_output kernel/events/core.c:7814 [inline]
perf_event_output_forward+0x19b/0x2e0 kernel/events/core.c:7832
__perf_event_overflow+0x35f/0x550 kernel/events/core.c:9525
perf_swevent_overflow kernel/events/core.c:9601 [inline]
perf_swevent_event+0x4b8/0x540 kernel/events/core.c:9639
perf_tp_event+0x324/0xbe0 kernel/events/core.c:10057
perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10031
perf_trace_lock+0x301/0x390 include/trace/events/lock.h:39
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x84a/0x8a0 kernel/locking/lockdep.c:5636
__mutex_unlock_slowpath+0xc8/0x6c0 kernel/locking/mutex.c:851
perf_event_ctx_unlock kernel/events/core.c:1413 [inline]
perf_ioctl+0x1f3a/0x2300 kernel/events/core.c:5967
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
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: 0033:0x7f379c781159
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:00007f379a9d9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f379ca08fa0 RCX: 00007f379c781159
RDX: 0000000000000008 RSI: 0000000040042408 RDI: 0000000000000009
RBP: 00007f379c81806b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f379ca09038 R14: 00007f379ca08fa0 R15: 00007ffd16bf8118
----------------
Code disassembly (best guess):
0: 84 c0 test %al,%al
2: 75 48 jne 0x4c
4: ff 0b decl (%rbx)
6: 75 1d jne 0x25
8: 4c 8d b7 40 04 00 00 lea 0x440(%rdi),%r14
f: 4c 89 f0 mov %r14,%rax
12: 48 c1 e8 03 shr $0x3,%rax
16: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax
1b: 84 c0 test %al,%al
1d: 75 5f jne 0x7e
1f: 41 83 3e 00 cmpl $0x0,(%r14)
23: 75 20 jne 0x45
25: 43 0f b6 04 3c movzbl (%r12,%r15,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 75 3a jne 0x68
2e: 8b 03 mov (%rbx),%eax
30: 3d 00 00 00 40 cmp $0x40000000,%eax
35: 73 0a jae 0x41
37: 5b pop %rbx
38: 41 5c pop %r12
3a: 41 5d pop %r13
3c: 41 5e pop %r14
3e: 41 5f pop %r15