------------[ cut here ]------------
WARNING: CPU: 1 PID: 4230 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4230 Comm: kworker/1:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: rcu_gp process_srcu
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 6d f7 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 f0 f3 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:ffffc90000dd09a0 EFLAGS: 00010046
RAX: ffffffff819ed660 RBX: 0000000000000000 RCX: ffff888022e00000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7a19
R10: fffffbfff1ff7a19 R11: 1ffffffff1ff7a18 R12: ffff888022e01788
R13: 1ffff920001ba144 R14: ffffc90000dd09c8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f76e0826f98 CR3: 0000000063f23000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_2903cf4cc3d681d2+0x3a/0xecc
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_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run3+0x17e/0x320 kernel/trace/bpf_trace.c:1916
__traceiter_workqueue_queue_work+0x77/0xd0 include/trace/events/workqueue.h:23
trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
__queue_work+0xcee/0xd50 kernel/workqueue.c:1512
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1491 [inline]
__run_timers+0x550/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:queue_delayed_work_on+0x18c/0x1e0 kernel/workqueue.c:1720
Code: 4d 85 ed 75 16 e8 e4 ae 2a 00 eb 15 e8 dd ae 2a 00 e8 18 13 5c 08 4d 85 ed 74 ea e8 ce ae 2a 00 fb 48 c7 44 24 20 0e 36 e0 45 <48> b8 00 00 00 00 00 fc ff df 49 c7 04 06 00 00 00 00 66 41 c7 44
RSP: 0018:ffffc9000316fb60 EFLAGS: 00000293
RAX: ffffffff814d1b82 RBX: 0000000000000000 RCX: ffff888022e00000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000316fc30 R08: dffffc0000000000 R09: fffffbfff1ff7a1b
R10: fffffbfff1ff7a1b R11: 1ffffffff1ff7a1a R12: dffffc0000000001
R13: 0000000000000200 R14: 1ffff9200062df70 R15: 0000000000000000
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
----------------
Code disassembly (best guess):
0: 4d 85 ed test %r13,%r13
3: 75 16 jne 0x1b
5: e8 e4 ae 2a 00 call 0x2aaeee
a: eb 15 jmp 0x21
c: e8 dd ae 2a 00 call 0x2aaeee
11: e8 18 13 5c 08 call 0x85c132e
16: 4d 85 ed test %r13,%r13
19: 74 ea je 0x5
1b: e8 ce ae 2a 00 call 0x2aaeee
20: fb sti
21: 48 c7 44 24 20 0e 36 movq $0x45e0360e,0x20(%rsp)
28: e0 45
* 2a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction
31: fc ff df
34: 49 c7 04 06 00 00 00 movq $0x0,(%r14,%rax,1)
3b: 00
3c: 66 data16
3d: 41 rex.B
3e: c7 .byte 0xc7
3f: 44 rex.R