------------[ cut here ]------------
WARNING: CPU: 0 PID: 12808 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 12808 Comm: syz.2.2967 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 5d 95 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 e0 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: ffffffff81a0b710 RBX: 0000000000000000 RCX: ffff8880181d8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000007157 R09: ffffc90000007124
R10: dffffc0000000000 R11: fffff52000000e2b R12: ffff8880181d9788
R13: ffffc900012a6030 R14: ffffc90000006d88 R15: 0000000000000000
FS: 00007f4877e2b6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555d25f4e8 CR3: 00000000627ad000 CR4: 00000000003506f0
DR0: 0000200000000300 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+0x32/0x64
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+0x7c5/0x6260 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+0x12e/0x2e0 net/core/dev.c:4186
__dev_queue_xmit+0x756/0x2f80 net/core/dev.c:4261
neigh_output include/net/neighbour.h:509 [inline]
ip6_finish_output2+0x108c/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:strlen+0x2a/0x60 lib/string.c:581
Code: 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89
RSP: 0018:ffffc9000349f358 EFLAGS: 00000a02
RAX: 0000000000000006 RBX: ffffffff8a2c35cb RCX: 000000008a2c3502
RDX: ffffffff81833775 RSI: ffffffff8c31f360 RDI: ffffffff8a2c35c0
RBP: ffffc9000349f470 R08: ffffffff8d8a06ef R09: 1ffffffff1b140dd
R10: dffffc0000000000 R11: fffffbfff1b140de R12: dffffc0000000000
R13: 1ffff92000693e78 R14: dffffc0000000000 R15: 000000000000000a
trace_event_get_offsets_lock include/trace/events/lock.h:39 [inline]
perf_trace_lock+0xbd/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:5634
rcu_read_unlock include/linux/rcupdate.h:773 [inline]
BPF_PROG_RUN_ARRAY include/linux/bpf.h:1444 [inline]
trace_call_bpf+0x4fe/0x5b0 kernel/trace/bpf_trace.c:127
perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10016
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:5634
memcg_slab_free_hook+0x6f/0x1f0 mm/slab.h:367
do_slab_free mm/slub.c:3437 [inline]
___cache_free+0x63/0x120 mm/slub.c:3511
qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x100/0x290 mm/slub.c:3238
__d_alloc+0x2a/0x6f0 fs/dcache.c:1749
d_alloc_pseudo+0x19/0x70 fs/dcache.c:1880
alloc_file_pseudo+0xe0/0x200 fs/file_table.c:256
sock_alloc_file+0xb3/0x240 net/socket.c:464
__sys_socketpair+0x2cc/0x540 net/socket.c:1675
__do_sys_socketpair net/socket.c:1704 [inline]
__se_sys_socketpair net/socket.c:1701 [inline]
__x64_sys_socketpair+0x97/0xb0 net/socket.c:1701
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: 0033:0x7f4879bd1e59
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:00007f4877e2b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f4879e4afa0 RCX: 00007f4879bd1e59
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f4879c67d6f R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000007c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4879e4b038 R14: 00007f4879e4afa0 R15: 00007fffa40a5688
----------------
Code disassembly (best guess):
0: 41 57 push %r15
2: 41 56 push %r14
4: 41 54 push %r12
6: 53 push %rbx
7: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax
e: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
15: fc ff df
18: 48 89 fb mov %rdi,%rbx
1b: 49 89 c7 mov %rax,%r15
1e: 48 89 d8 mov %rbx,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 75 11 jne 0x3f
2e: 48 ff c3 inc %rbx
31: 49 8d 47 01 lea 0x1(%r15),%rax
35: 42 80 7c 3f 01 00 cmpb $0x0,0x1(%rdi,%r15,1)
3b: 75 de jne 0x1b
3d: eb 19 jmp 0x58
3f: 89 .byte 0x89