------------[ cut here ]------------
WARNING: CPU: 0 PID: 8026 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 8026 Comm: syz.1.1116 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 ed 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 70 f3 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:ffffc90000007270 EFLAGS: 00010246
RAX: ffffffff819ed740 RBX: 0000000000000008 RCX: ffff888023343b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1004668771
R10: ffffed1004668771 R11: 1ffff11004668770 R12: ffff888023345308
R13: 00007ffffffff000 R14: ffffc900000072e8 R15: 0000000020000000
FS: 00007f8e290726c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d70eff8 CR3: 0000000073b43000 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_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_5552427ec2450e15+0x40/0x1a8
bpf_dispatcher_nop_func include/linux/bpf.h:790 [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
__traceiter_net_dev_start_xmit+0x6c/0xc0 include/trace/events/net.h:14
trace_net_dev_start_xmit include/trace/events/net.h:14 [inline]
xmit_one net/core/dev.c:3648 [inline]
dev_hard_start_xmit+0x5c7/0x7e0 net/core/dev.c:3665
sch_direct_xmit+0x24e/0x4a0 net/sched/sch_generic.c:342
__dev_xmit_skb net/core/dev.c:3884 [inline]
__dev_queue_xmit+0x170e/0x2ed0 net/core/dev.c:4253
neigh_hh_output include/net/neighbour.h:493 [inline]
neigh_output include/net/neighbour.h:507 [inline]
ip_finish_output2+0xc69/0x1080 net/ipv4/ip_output.c:228
dst_output include/net/dst.h:452 [inline]
ip_local_out net/ipv4/ip_output.c:126 [inline]
__ip_queue_xmit+0x11c3/0x1c00 net/ipv4/ip_output.c:532
__tcp_transmit_skb+0x1ced/0x31c0 net/ipv4/tcp_output.c:1404
tcp_delack_timer_handler+0x32e/0x730 net/ipv4/tcp_timer.c:314
tcp_delack_timer+0x188/0x2e0 net/ipv4/tcp_timer.c:341
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
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
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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194
Code: 74 05 e8 6e 8d cb f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 26 16 9f f7 65 8b 05 27 14 50 76 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900035cf420 EFLAGS: 00000206
RAX: a0f3858c6e70fc00 RBX: 0000000000000a06 RCX: a0f3858c6e70fc00
RDX: dffffc0000000000 RSI: ffffffff8a0b1620 RDI: 0000000000000001
RBP: ffffc900035cf4b0 R08: dffffc0000000000 R09: fffffbfff2c63923
R10: fffffbfff2c63923 R11: 1ffffffff2c63922 R12: dffffc0000000000
R13: ffff888060399300 R14: ffffffff9631c910 R15: 1ffff920006b9e84
__debug_check_no_obj_freed lib/debugobjects.c:982 [inline]
debug_check_no_obj_freed+0x515/0x530 lib/debugobjects.c:1003
slab_free_hook mm/slub.c:1680 [inline]
slab_free_freelist_hook+0x8b/0x170 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xef/0x2a0 mm/slub.c:4559
bpf_check+0xa1e5/0xf090 kernel/bpf/verifier.c:14249
bpf_prog_load+0x1043/0x1550 kernel/bpf/syscall.c:2348
__sys_bpf+0x4c2/0x670 kernel/bpf/syscall.c:4651
__do_sys_bpf kernel/bpf/syscall.c:4755 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4753 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753
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: 0033:0x7f8e2ae0abe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8e29072038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8e2b031fa0 RCX: 00007f8e2ae0abe9
RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f8e2ae8de19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e2b032038 R14: 00007f8e2b031fa0 R15: 00007fff11f55798
----------------
Code disassembly (best guess):
0: 74 05 je 0x7
2: e8 6e 8d cb f7 call 0xf7cb8d75
7: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp)
e: 00 00
10: 9c pushf
11: 8f 44 24 20 pop 0x20(%rsp)
15: f6 44 24 21 02 testb $0x2,0x21(%rsp)
1a: 75 4b jne 0x67
1c: f7 c3 00 02 00 00 test $0x200,%ebx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 26 16 9f f7 call 0xf79f1655 <-- trapping instruction
2f: 65 8b 05 27 14 50 76 mov %gs:0x76501427(%rip),%eax # 0x7650145d
36: 85 c0 test %eax,%eax
38: 74 3c je 0x76
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss