------------[ cut here ]------------
WARNING: CPU: 0 PID: 4182 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4182 Comm: syz-executor 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 0d f6 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 90 f2 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:ffffc900000069c8 EFLAGS: 00010246
RAX: ffffffff819ed980 RBX: 0000000000000008 RCX: ffff88807b410000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff5419
R10: fffffbfff1ff5419 R11: 1ffffffff1ff5418 R12: ffff88807b411788
R13: dffffc0000000000 R14: ffffc90000006a28 R15: ffffffffa3000000
FS: 000055557973f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557975a5c8 CR3: 00000000641f9000 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/0xee4
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+0x15b/0x2d0 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+0x6fe/0x850 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb+0x4c/0x60 net/core/skbuff.c:756
tcp_clean_rtx_queue net/ipv4/tcp_input.c:3407 [inline]
tcp_ack+0x2086/0x6260 net/ipv4/tcp_input.c:3964
tcp_rcv_established+0xea6/0x1cb0 net/ipv4/tcp_input.c:5981
tcp_v4_do_rcv+0x44b/0x9b0 net/ipv4/tcp_ipv4.c:1731
tcp_v4_rcv+0x268f/0x2cb0 net/ipv4/tcp_ipv4.c:2143
ip_protocol_deliver_rcu+0x3ad/0x770 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x1d5/0x320 net/ipv4/ip_input.c:231
NF_HOOK+0x2d6/0x360 include/linux/netfilter.h:302
dst_input include/net/dst.h:462 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:577 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:628 [inline]
ip_sublist_rcv+0xa1f/0xce0 net/ipv4/ip_input.c:636
ip_list_rcv+0x3df/0x430 net/ipv4/ip_input.c:671
__netif_receive_skb_list_ptype net/core/dev.c:5568 [inline]
__netif_receive_skb_list_core+0x574/0x740 net/core/dev.c:5616
__netif_receive_skb_list net/core/dev.c:5668 [inline]
netif_receive_skb_list_internal+0x871/0xb90 net/core/dev.c:5759
gro_normal_list net/core/dev.c:5913 [inline]
napi_complete_done+0x37d/0x830 net/core/dev.c:6651
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0x912/0xef0 drivers/net/virtio_net.c:1624
__napi_poll+0xc0/0x430 net/core/dev.c:7075
napi_poll net/core/dev.c:7142 [inline]
net_rx_action+0x4a8/0x9c0 net/core/dev.c:7232
handle_softirqs+0x328/0x820 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
common_interrupt+0xb5/0xd0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
RIP: 0010:__read_once_word_nocheck+0x0/0x10 include/asm-generic/rwonce.h:67
Code: 38 c1 0f 8c c6 fc ff ff 4c 89 e7 e8 5a 96 87 00 48 ba 00 00 00 00 00 fc ff df e9 af fc ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 <48> 8b 07 c3 00 00 cc cc 00 00 cc cc 00 00 cc cc 31 c0 81 ff 03 00
RSP: 0018:ffffc90002e7f440 EFLAGS: 00000202
RAX: ffffc90002e7f601 RBX: ffffc90002e7f568 RCX: 1ffff920005cfe01
RDX: 1ffffffff1bc3536 RSI: ffffffff8de1a9b0 RDI: ffffc90002e7f5f8
RBP: ffffc90002e7f5b0 R08: 0000000000000007 R09: ffffc90002e7f5b8
R10: fffff520005cfeb9 R11: 1ffff920005cfeb7 R12: 1ffffffff1bc3536
R13: ffffc90002e80000 R14: ffffc90002e78000 R15: ffffc90002e7f5f8
deref_stack_reg arch/x86/kernel/unwind_orc.c:360 [inline]
unwind_next_frame+0x9c4/0x1d90 arch/x86/kernel/unwind_orc.c:539
__unwind_start+0x5bb/0x740 arch/x86/kernel/unwind_orc.c:704
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xda/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/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+0xea/0x170 mm/slub.c:1736
slab_free mm/slub.c:3504 [inline]
kfree+0xef/0x2a0 mm/slub.c:4564
tomoyo_path_perm+0x3e8/0x510 security/tomoyo/file.c:842
security_inode_getattr+0xcf/0x120 security/security.c:1348
vfs_getattr+0x26/0x3a0 fs/stat.c:157
vfs_statx+0x149/0x4d0 fs/stat.c:225
vfs_fstatat fs/stat.c:243 [inline]
__do_sys_newfstatat fs/stat.c:411 [inline]
__se_sys_newfstatat fs/stat.c:405 [inline]
__x64_sys_newfstatat+0x12c/0x1b0 fs/stat.c:405
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: 0033:0x7f4d9cd61e3a
Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7
RSP: 002b:00007ffc80a76d98 EFLAGS: 00000286 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007f4d9cde7d7d RCX: 00007f4d9cd61e3a
RDX: 00007ffc80a76dc0 RSI: 00007ffc80a76e50 RDI: 00000000ffffff9c
RBP: 00007ffc80a76e50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000286 R12: 00007ffc80a77ee0
R13: 00007f4d9cde7d7d R14: 0000000000015511 R15: 00007ffc80a77f20
----------------
Code disassembly (best guess):
0: 38 c1 cmp %al,%cl
2: 0f 8c c6 fc ff ff jl 0xfffffcce
8: 4c 89 e7 mov %r12,%rdi
b: e8 5a 96 87 00 call 0x87966a
10: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
17: fc ff df
1a: e9 af fc ff ff jmp 0xfffffcce
1f: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
26: 00 00 00
29: 90 nop
* 2a: 48 8b 07 mov (%rdi),%rax <-- trapping instruction
2d: c3 ret
2e: 00 00 add %al,(%rax)
30: cc int3
31: cc int3
32: 00 00 add %al,(%rax)
34: cc int3
35: cc int3
36: 00 00 add %al,(%rax)
38: cc int3
39: cc int3
3a: 31 c0 xor %eax,%eax
3c: 81 .byte 0x81
3d: ff 03 incl (%rbx)