------------[ cut here ]------------
WARNING: CPU: 0 PID: 24622 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 24622 Comm: dhcpcd-run-hook Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 fd 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 80 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:ffffc90000006d28 EFLAGS: 00010246
RAX: ffffffff81a08f90 RBX: 0000000000000000 RCX: ffff88802a7f8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000007157 R09: ffffc90000007124
R10: dffffc0000000000 R11: fffff52000000e2b R12: ffff88802a7f9788
R13: ffffc900012b6030 R14: ffffc90000006d88 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe059eab000 CR3: 000000002560c000 CR4: 00000000003506f0
DR0: 0000000000000000 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_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_f2594087b0f175cc+0x32/0x738
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_prog_run_pin_on_cpu include/linux/filter.h:652 [inline]
bpf_flow_dissect+0x12b/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:3256 [inline]
netdev_pick_tx+0x335/0xad0 net/core/dev.c:4153
netdev_core_pick_tx+0x12e/0x2e0 net/core/dev.c:4186
__dev_queue_xmit+0x756/0x2f80 net/core/dev.c:4261
neigh_hh_output include/net/neighbour.h:493 [inline]
neigh_output include/net/neighbour.h:507 [inline]
ip6_finish_output2+0x1051/0x1510 net/ipv6/ip6_output.c:130
dst_output include/net/dst.h:452 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xc2a/0x1500 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2d1/0x630 net/ipv6/addrconf.c:3956
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
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:anon_vma_lock_read include/linux/rmap.h:129 [inline]
RIP: 0010:validate_mm+0x7f/0x950 mm/mmap.c:404
Code: e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 2a 75 0e 00 4d 8b 3f 4d 85 ff 0f 84 b0 00 00 00 4c 89 fd 48 c1 ed 03 42 80 7c 2d 00 00 <74> 08 4c 89 ff e8 07 75 0e 00 49 8b 3f 48 83 c7 08 e8 3b 57 15 08
RSP: 0018:ffffc9000379f8c8 EFLAGS: 00000246
RAX: 1ffff11005d8e77c RBX: 000000000000001a RCX: ffff88802a7f8000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: 1ffff110048b8ecc R08: ffff8880245c700f R09: 1ffff110048b8e01
R10: dffffc0000000000 R11: ffffed10048b8e02 R12: ffff888020053390
R13: dffffc0000000000 R14: ffff88802ec73b58 R15: ffff8880245c7660
__vma_adjust+0x17f3/0x1c10 mm/mmap.c:1029
vma_adjust include/linux/mm.h:2567 [inline]
__split_vma+0x34b/0x410 mm/mmap.c:-1
__do_munmap+0x3fe/0xdf0 mm/mmap.c:2865
do_munmap mm/mmap.c:2910 [inline]
munmap_vma_range mm/mmap.c:603 [inline]
__mmap_region mm/mmap.c:1757 [inline]
mmap_region+0x8b4/0x1650 mm/mmap.c:2933
do_mmap+0x819/0xe90 mm/mmap.c:1586
vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:551
ksys_mmap_pgoff+0x54b/0x790 mm/mmap.c:1635
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: 0033:0x7fe05a1cc242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffe7dc06368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fe059ea6000 RCX: 00007fe05a1cc242
RDX: 0000000000000001 RSI: 0000000000002000 RDI: 00007fe059ea6000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000005000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffe7dc063f0
R13: 00007fe059eab0c0 R14: 00007ffe7dc067a0 R15: 00000fffcfb80c70
----------------
Code disassembly (best guess):
0: e8 03 42 80 3c call 0x3c804208
5: 28 00 sub %al,(%rax)
7: 74 08 je 0x11
9: 4c 89 ff mov %r15,%rdi
c: e8 2a 75 0e 00 call 0xe753b
11: 4d 8b 3f mov (%r15),%r15
14: 4d 85 ff test %r15,%r15
17: 0f 84 b0 00 00 00 je 0xcd
1d: 4c 89 fd mov %r15,%rbp
20: 48 c1 ed 03 shr $0x3,%rbp
24: 42 80 7c 2d 00 00 cmpb $0x0,0x0(%rbp,%r13,1)
* 2a: 74 08 je 0x34 <-- trapping instruction
2c: 4c 89 ff mov %r15,%rdi
2f: e8 07 75 0e 00 call 0xe753b
34: 49 8b 3f mov (%r15),%rdi
37: 48 83 c7 08 add $0x8,%rdi
3b: e8 3b 57 15 08 call 0x815577b