------------[ cut here ]------------
WARNING: CPU: 1 PID: 19720 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 19720 Comm: syz.4.13443 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 4d 7a 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 d0 76 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:ffffc90000dcfe88 EFLAGS: 00010246
RAX: ffffffff81a0ac90 RBX: 0000000000000000 RCX: ffff88807e1d0000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000dd02b7 R09: ffffc90000dd0284
R10: dffffc0000000000 R11: fffff520001ba057 R12: ffff88807e1d17a8
R13: ffffc9000130e030 R14: ffffc90000dcfee8 R15: 0000000000000000
FS: 00007f8e2f2a46c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000035000 CR3: 000000005fc9c000 CR4: 00000000003506e0
DR0: 0000200000000d00 DR1: 0000000000000000 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_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_f2594087b0f175cc+0x32/0xa58
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_prog_run_pin_on_cpu include/linux/filter.h:652 [inline]
bpf_flow_dissect+0x12b/0x3e0 net/core/flow_dissector.c:896
__skb_flow_dissect+0x7cc/0x6180 net/core/flow_dissector.c:1029
skb_flow_dissect_flow_keys include/linux/skbuff.h:1390 [inline]
___skb_get_hash+0x55/0x680 net/core/flow_dissector.c:1638
__skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1703
skb_get_hash include/linux/skbuff.h:1432 [inline]
skb_tx_hash net/core/dev.c:3256 [inline]
netdev_pick_tx+0x335/0xad0 net/core/dev.c:4153
netdev_core_pick_tx+0x141/0x300 net/core/dev.c:4186
__dev_queue_xmit+0x797/0x2e50 net/core/dev.c:4261
hsr_xmit net/hsr/hsr_forward.c:340 [inline]
hsr_forward_do net/hsr/hsr_forward.c:431 [inline]
hsr_forward_skb+0xf82/0x16b0 net/hsr/hsr_forward.c:584
send_hsr_supervision_frame+0x5f7/0xb90 net/hsr/hsr_device.c:348
hsr_announce+0x168/0x310 net/hsr/hsr_device.c:404
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x56c/0x810 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x336/0x830 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:__sanitizer_cov_trace_cmp4+0x7e/0x80 kernel/kcov.c:267
Code: 8d 50 28 4d 39 ca 77 22 89 ff 89 f6 4a c7 44 02 08 04 00 00 00 4a 89 7c 02 10 4a 89 74 02 18 4a 89 44 02 20 48 ff c1 48 89 0a 90 48 8b 04 24 65 48 8b 0d 74 4a 89 7e 65 8b 15 75 4a 89 7e 81
RSP: 0018:ffffc9000339f0d8 EFLAGS: 00000293
RAX: ffffffff818b9e5f RBX: 0000000000000013 RCX: ffff88807e1d0000
RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000013
RBP: ffffc9000339f270 R08: ffff88807e1d0000 R09: 0000000000000003
R10: 0000000000000006 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff92000673e38 R14: 000000000000000a R15: ffff888026f24008
get_prev_insn_idx kernel/bpf/verifier.c:2153 [inline]
__mark_chain_precision+0xe9f/0x2010 kernel/bpf/verifier.c:2650
mark_chain_precision kernel/bpf/verifier.c:2736 [inline]
check_cond_jmp_op kernel/bpf/verifier.c:9336 [inline]
do_check+0xc558/0xf170 kernel/bpf/verifier.c:11529
do_check_common+0xe7f/0x16e0 kernel/bpf/verifier.c:13542
do_check_main kernel/bpf/verifier.c:13605 [inline]
bpf_check+0x32e9/0xf5f0 kernel/bpf/verifier.c:14188
bpf_prog_load+0xfdf/0x14e0 kernel/bpf/syscall.c:2354
__sys_bpf+0x532/0x6f0 kernel/bpf/syscall.c:4657
__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: 0033:0x7f8e3106d559
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:00007f8e2f2a4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8e312f5090 RCX: 00007f8e3106d559
RDX: 0000000000000094 RSI: 0000200000000180 RDI: 0000000000000005
RBP: 00007f8e311048b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e312f5128 R14: 00007f8e312f5090 R15: 00007ffe4be27558
----------------
Code disassembly (best guess):
0: 8d 50 28 lea 0x28(%rax),%edx
3: 4d 39 ca cmp %r9,%r10
6: 77 22 ja 0x2a
8: 89 ff mov %edi,%edi
a: 89 f6 mov %esi,%esi
c: 4a c7 44 02 08 04 00 movq $0x4,0x8(%rdx,%r8,1)
13: 00 00
15: 4a 89 7c 02 10 mov %rdi,0x10(%rdx,%r8,1)
1a: 4a 89 74 02 18 mov %rsi,0x18(%rdx,%r8,1)
1f: 4a 89 44 02 20 mov %rax,0x20(%rdx,%r8,1)
24: 48 ff c1 inc %rcx
27: 48 89 0a mov %rcx,(%rdx)
* 2a: c3 ret <-- trapping instruction
2b: 90 nop
2c: 48 8b 04 24 mov (%rsp),%rax
30: 65 48 8b 0d 74 4a 89 mov %gs:0x7e894a74(%rip),%rcx # 0x7e894aac
37: 7e
38: 65 8b 15 75 4a 89 7e mov %gs:0x7e894a75(%rip),%edx # 0x7e894ab4
3f: 81 .byte 0x81