------------[ cut here ]------------
WARNING: CPU: 1 PID: 6633 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 6633 Comm: syz.7.434 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 94 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 00 91 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:ffffc90000dcfec8 EFLAGS: 00010246
RAX: ffffffff81a08ea0 RBX: 0000000000000000 RCX: ffff88802655d940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8f0e6048 R09: ffffffff8f0e6058
R10: ffffffff8f0e6050 R11: ffffffff8f0e6043 R12: ffff88802655f0c8
R13: ffffc90000e26000 R14: ffffc90000dcff28 R15: 0000000000000000
FS: 00007ff1927bd6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff1945af400 CR3: 0000000063065000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
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_f2594087b0f175cc+0x32/0x7c8
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:621 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
bpf_prog_run_pin_on_cpu include/linux/filter.h:652 [inline]
bpf_flow_dissect+0x33e/0x3f0 net/core/flow_dissector.c:896
__skb_flow_dissect+0x792/0x60b0 net/core/flow_dissector.c:1024
skb_flow_dissect_flow_keys include/linux/skbuff.h:1390 [inline]
___skb_get_hash+0x55/0x680 net/core/flow_dissector.c:1583
__skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1648
skb_get_hash include/linux/skbuff.h:1432 [inline]
skb_tx_hash net/core/dev.c:3243 [inline]
netdev_pick_tx+0x335/0xad0 net/core/dev.c:4140
netdev_core_pick_tx+0x12e/0x2e0 net/core/dev.c:4173
__dev_queue_xmit+0x756/0x2fd0 net/core/dev.c:4248
hsr_xmit net/hsr/hsr_forward.c:340 [inline]
hsr_forward_do net/hsr/hsr_forward.c:431 [inline]
hsr_forward_skb+0xfd2/0x1700 net/hsr/hsr_forward.c:584
send_hsr_supervision_frame+0x5f7/0xb80 net/hsr/hsr_device.c:349
hsr_announce+0x168/0x310 net/hsr/hsr_device.c:405
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x53a/0x7f0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 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:__rb_page_index kernel/trace/ring_buffer.c:2347 [inline]
RIP: 0010:__rb_reserve_next+0x5a5/0xd70 kernel/trace/ring_buffer.c:3634
Code: f9 48 c1 e9 03 48 b8 00 00 00 00 00 fc ff df 48 89 4c 24 20 80 3c 01 00 74 08 4c 89 ff e8 e3 1f 42 00 4c 89 7c 24 10 49 8b 07 <89> e9 48 8d 44 08 10 48 89 44 24 18 48 89 84 24 b0 00 00 00 49 bf
RSP: 0018:ffffc90002e7f5e8 EFLAGS: 00000246
RAX: ffff888017a43000 RBX: ffffc90002e7f780 RCX: 1ffff11027fcf9c6
RDX: ffffc90012bc5000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 000000000000058c R08: ffff8880b912b243 R09: 1ffff11017225648
R10: dffffc0000000000 R11: ffffed1017225649 R12: 0000000000000014
R13: 00000000000005a0 R14: ffffc90002e7f760 R15: ffff88813fe7ce30
rb_reserve_next_event kernel/trace/ring_buffer.c:3713 [inline]
ring_buffer_lock_reserve+0xadd/0xed0 kernel/trace/ring_buffer.c:3772
__trace_buffer_lock_reserve kernel/trace/trace.c:942 [inline]
trace_event_buffer_lock_reserve+0xd4/0x6a0 kernel/trace/trace.c:2819
trace_event_buffer_reserve+0x2a8/0x3d0 kernel/trace/trace_events.c:627
trace_event_raw_event_bpf_trace_printk+0x138/0x280 kernel/trace/bpf_trace.h:11
trace_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
____bpf_trace_printk kernel/trace/bpf_trace.c:383 [inline]
bpf_trace_printk+0x2f0/0x360 kernel/trace/bpf_trace.c:366
bpf_prog_877e8cccf197c1a6+0x4c/0x3b0
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:621 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
bpf_test_run+0x4ae/0x800 net/bpf/test_run.c:119
bpf_prog_test_run_skb+0x9cc/0x1180 net/bpf/test_run.c:669
bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3374
__sys_bpf+0x5a5/0x6f0 kernel/bpf/syscall.c:4675
__do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
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: 0033:0x7ff194561cb9
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:00007ff1927bd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ff1947dcfa0 RCX: 00007ff194561cb9
RDX: 000000000000004c RSI: 0000200000000640 RDI: 000000000000000a
RBP: 00007ff1945cfbf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff1947dd038 R14: 00007ff1947dcfa0 R15: 00007ffcb1453098
----------------
Code disassembly (best guess):
0: f9 stc
1: 48 c1 e9 03 shr $0x3,%rcx
5: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
c: fc ff df
f: 48 89 4c 24 20 mov %rcx,0x20(%rsp)
14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1)
18: 74 08 je 0x22
1a: 4c 89 ff mov %r15,%rdi
1d: e8 e3 1f 42 00 call 0x422005
22: 4c 89 7c 24 10 mov %r15,0x10(%rsp)
27: 49 8b 07 mov (%r15),%rax
* 2a: 89 e9 mov %ebp,%ecx <-- trapping instruction
2c: 48 8d 44 08 10 lea 0x10(%rax,%rcx,1),%rax
31: 48 89 44 24 18 mov %rax,0x18(%rsp)
36: 48 89 84 24 b0 00 00 mov %rax,0xb0(%rsp)
3d: 00
3e: 49 rex.WB
3f: bf .byte 0xbf