------------[ cut here ]------------
WARNING: CPU: 0 PID: 4504 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4504 Comm: syz.0.74 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:ffffc90000006f48 EFLAGS: 00010246
RAX: ffffffff81a08ea0 RBX: 0000000000000008 RCX: ffff88802602bb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: 1ffffffff203a218
R10: dffffc0000000000 R11: fffffbfff203a219 R12: ffff88802602d308
R13: dffffc0000000000 R14: ffffc90000006fa8 R15: ffffffffa3000000
FS: 00007f77a5a7a6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c326782 CR3: 000000005fc7a000 CR4: 00000000003506f0
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_b01026b2908340f4+0x3d/0xb14
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_run2+0x163/0x2e0 kernel/trace/bpf_trace.c:1915
__bpf_trace_kfree+0x6e/0x90 include/trace/events/kmem.h:118
trace_kfree include/trace/events/kmem.h:118 [inline]
kfree+0x25f/0x2a0 mm/slub.c:4554
skb_free_head net/core/skbuff.c:655 [inline]
skb_release_data+0x6b8/0x800 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb net/core/skbuff.c:756 [inline]
kfree_skb_reason+0xaf/0x110 net/core/skbuff.c:776
kfree_skb include/linux/skbuff.h:1118 [inline]
ip_tunnel_xmit+0x1a96/0x2280 net/ipv4/ip_tunnel.c:-1
__gre_xmit net/ipv4/ip_gre.c:474 [inline]
erspan_xmit+0x9d5/0x15a0 net/ipv4/ip_gre.c:723
__netdev_start_xmit include/linux/netdevice.h:5036 [inline]
netdev_start_xmit include/linux/netdevice.h:5050 [inline]
xmit_one net/core/dev.c:3649 [inline]
dev_hard_start_xmit+0x2a5/0x7e0 net/core/dev.c:3665
sch_direct_xmit+0x25a/0x4b0 net/sched/sch_generic.c:345
__dev_xmit_skb net/core/dev.c:3884 [inline]
__dev_queue_xmit+0x179f/0x2fd0 net/core/dev.c:4253
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: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:arch_stack_walk+0xe3/0x140 arch/x86/kernel/stacktrace.c:-1
Code: 00 00 00 00 48 c7 85 78 ff ff ff 00 00 00 00 48 8d bd 78 ff ff ff 4c 89 e6 4c 89 fa e8 16 54 08 00 83 bd 78 ff ff ff 00 74 32 <4c> 8d bd 78 ff ff ff 4c 89 ff e8 2e 34 08 00 48 85 c0 74 1e 48 89
RSP: 0018:ffffc9000344f848 EFLAGS: 00000202
RAX: ffffc9000344f8d0 RBX: ffffc9000344f900 RCX: 0000000080000001
RDX: ffffc9000344f8d8 RSI: dffffc0000000000 RDI: 00000000ffffffff
RBP: ffffc9000344f8d0 R08: ffffc9000344f8a7 R09: ffffc9000344f898
R10: dffffc0000000000 R11: fffff52000689f15 R12: ffff88802602bb80
R13: ffff888016de9000 R14: ffffffff81679ee0 R15: 0000000000000000
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467
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
kmem_cache_zalloc include/linux/slab.h:728 [inline]
lsm_file_alloc security/security.c:574 [inline]
security_file_alloc+0x30/0x110 security/security.c:1530
__alloc_file+0xc2/0x240 fs/file_table.c:137
alloc_empty_file+0x90/0x180 fs/file_table.c:181
alloc_file+0x5b/0x4f0 fs/file_table.c:223
alloc_file_pseudo+0x180/0x200 fs/file_table.c:263
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: 0033:0x7f77a781ecb9
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:00007f77a5a7a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f77a7a99fa0 RCX: 00007f77a781ecb9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000000000000001e
RBP: 00007f77a788cbf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000400 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f77a7a9a038 R14: 00007f77a7a99fa0 R15: 00007ffe7cd7a0a8
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 48 c7 85 78 ff ff ff movq $0x0,-0x88(%rbp)
b: 00 00 00 00
f: 48 8d bd 78 ff ff ff lea -0x88(%rbp),%rdi
16: 4c 89 e6 mov %r12,%rsi
19: 4c 89 fa mov %r15,%rdx
1c: e8 16 54 08 00 call 0x85437
21: 83 bd 78 ff ff ff 00 cmpl $0x0,-0x88(%rbp)
28: 74 32 je 0x5c
* 2a: 4c 8d bd 78 ff ff ff lea -0x88(%rbp),%r15 <-- trapping instruction
31: 4c 89 ff mov %r15,%rdi
34: e8 2e 34 08 00 call 0x83467
39: 48 85 c0 test %rax,%rax
3c: 74 1e je 0x5c
3e: 48 rex.W
3f: 89 .byte 0x89