------------[ cut here ]------------
WARNING: CPU: 0 PID: 4922 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4922 Comm: syz.8.6714 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 4d 97 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 93 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:ffffc90000007908 EFLAGS: 00010006
RAX: ffffffff81a068e0 RBX: 0000000000000000 RCX: ffff88802a5e8000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88802a5e8007 R09: 1ffff110054bd000
R10: dffffc0000000000 R11: ffffed10054bd001 R12: ffff88802a5e9788
R13: 00007ffffffff000 R14: ffffc90000007938 R15: 0000000020000000
FS: 00007f98243df6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f98243bed58 CR3: 000000001fc55000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_98b95619a2082788_F+0x29/0x95c
bpf_prog_01cd1b75708a3bcf+0x1a/0x334
bpf_dispatcher_nop_func include/linux/bpf.h:889 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
bpf_overflow_handler+0x1c2/0x4a0 kernel/events/core.c:10297
__perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515
perf_swevent_hrtimer+0x3c2/0x550 kernel/events/core.c:10934
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4b0/0xb60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x397/0x8b0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
__sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:stackdepot_memcmp lib/stackdepot.c:193 [inline]
RIP: 0010:find_stack lib/stackdepot.c:210 [inline]
RIP: 0010:stack_depot_save+0x185/0x460 lib/stackdepot.c:280
Code: 5e 89 f1 eb 09 4d 8b 24 24 4d 85 e4 74 51 41 39 6c 24 08 75 f0 41 39 74 24 0c 75 e9 45 31 c0 4e 8b 0c c7 4f 3b 4c c4 18 75 db <49> ff c0 44 39 c1 75 ed 4d 85 e4 74 05 41 8b 44 24 10 65 48 8b 0c
RSP: 0018:ffffc90003caed30 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000088041 RCX: 0000000000000013
RDX: 0000000000000800 RSI: 0000000000000013 RDI: ffffc90003caed90
RBP: 000000001b588041 R08: 000000000000000d R09: ffffffff88207fca
R10: 0000000000000002 R11: 00000000732dc9ac R12: ffff88801e7dc3c0
R13: ffff88823b000000 R14: 00000000c7b1eb7c R15: ffffc90003caed90
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track+0x62/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1710 [inline]
slab_free_freelist_hook+0xec/0x170 mm/slub.c:1736
slab_free mm/slub.c:3504 [inline]
kmem_cache_free+0x8f/0x210 mm/slub.c:3520
netlink_broadcast_filtered+0x107f/0x1170 net/netlink/af_netlink.c:1535
netlink_broadcast net/netlink/af_netlink.c:1557 [inline]
nlmsg_multicast include/net/netlink.h:1044 [inline]
nlmsg_notify+0xdf/0x190 net/netlink/af_netlink.c:2562
__neigh_notify+0x191/0x2e0 net/core/neighbour.c:3390
neigh_update_notify net/core/neighbour.c:2531 [inline]
__neigh_update+0x19de/0x2010 net/core/neighbour.c:1419
neigh_add+0xa62/0xd70 net/core/neighbour.c:1982
rtnetlink_rcv_msg+0x7f1/0xf10 net/core/rtnetlink.c:5698
netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2519
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x78f/0x940 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:706 [inline]
__sock_sendmsg net/socket.c:718 [inline]
____sys_sendmsg+0x5be/0x8f0 net/socket.c:2446
___sys_sendmsg+0x236/0x2e0 net/socket.c:2500
__sys_sendmsg net/socket.c:2529 [inline]
__do_sys_sendmsg net/socket.c:2538 [inline]
__se_sys_sendmsg+0x1b7/0x2a0 net/socket.c:2536
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: 0033:0x7f98261870d9
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:00007f98243df028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f982640efa0 RCX: 00007f98261870d9
RDX: 0000000000040000 RSI: 0000200000000940 RDI: 0000000000000004
RBP: 00007f982621e024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f982640f038 R14: 00007f982640efa0 R15: 00007ffc8aa6a778
----------------
Code disassembly (best guess):
0: 5e pop %rsi
1: 89 f1 mov %esi,%ecx
3: eb 09 jmp 0xe
5: 4d 8b 24 24 mov (%r12),%r12
9: 4d 85 e4 test %r12,%r12
c: 74 51 je 0x5f
e: 41 39 6c 24 08 cmp %ebp,0x8(%r12)
13: 75 f0 jne 0x5
15: 41 39 74 24 0c cmp %esi,0xc(%r12)
1a: 75 e9 jne 0x5
1c: 45 31 c0 xor %r8d,%r8d
1f: 4e 8b 0c c7 mov (%rdi,%r8,8),%r9
23: 4f 3b 4c c4 18 cmp 0x18(%r12,%r8,8),%r9
28: 75 db jne 0x5
* 2a: 49 ff c0 inc %r8 <-- trapping instruction
2d: 44 39 c1 cmp %r8d,%ecx
30: 75 ed jne 0x1f
32: 4d 85 e4 test %r12,%r12
35: 74 05 je 0x3c
37: 41 8b 44 24 10 mov 0x10(%r12),%eax
3c: 65 gs
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 0c .byte 0xc