------------[ cut here ]------------
WARNING: CPU: 1 PID: 4200 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4200 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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:ffffc90000dcfec8 EFLAGS: 00010246
RAX: ffffffff81a0b710 RBX: 0000000000000000 RCX: ffff8880777a5940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000dd02f7 R09: ffffc90000dd02c4
R10: dffffc0000000000 R11: fffff520001ba05f R12: ffff8880777a70c8
R13: ffffc90001256030 R14: ffffc90000dcff28 R15: 0000000000000000
FS: 000055558a678500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff4dc61c70 CR3: 0000000063bd9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 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+0x32/0xd84
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
hsr_xmit net/hsr/hsr_forward.c:340 [inline]
hsr_forward_do net/hsr/hsr_forward.c:431 [inline]
hsr_forward_skb+0xfd2/0x1700 net/hsr/hsr_forward.c:584
send_hsr_supervision_frame+0x5f7/0xb80 net/hsr/hsr_device.c:349
hsr_announce+0x168/0x310 net/hsr/hsr_device.c:405
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:__raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline]
RIP: 0010:_raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
Code: df 5b 41 5e e9 ef 92 97 f7 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0e bf 96 f7 <48> 89 df e8 46 97 97 f7 bf 01 00 00 00 e8 2c 9e 8b f7 65 8b 05 4d
RSP: 0018:ffffc9000300fda8 EFLAGS: 00000246
RAX: 7adc7ae63b223600 RBX: ffff88806346b698 RCX: 7adc7ae63b223600
RDX: 0000000000000002 RSI: ffffffff8a2b4420 RDI: ffffffff8a7a09c0
RBP: dffffc0000000000 R08: ffffffff8d8a06ef R09: 1ffffffff1b140dd
R10: dffffc0000000000 R11: fffffbfff1b140de R12: 1ffff1100ea7697d
R13: ffff8880753b4be8 R14: ffff8880753b4bc8 R15: ffffffff8a3399d0
dget include/linux/dcache.h:327 [inline]
vfs_rmdir+0xb1/0x430 fs/namei.c:4146
do_rmdir+0x2a1/0x740 fs/namei.c:4218
__do_sys_unlinkat fs/namei.c:4398 [inline]
__se_sys_unlinkat fs/namei.c:4392 [inline]
__x64_sys_unlinkat+0xc0/0xe0 fs/namei.c:4392
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: 0033:0x7f2acd1cff77
Code: 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 07 01 00 00 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:00007fff4dc622c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f2acd1cff77
RDX: 0000000000000200 RSI: 00007fff4dc63410 RDI: 00000000ffffff9c
RBP: 00007f2acd2661ca R08: 00000000000065d0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000207 R12: 00007fff4dc63410
R13: 00007f2acd2661ca R14: 0000000000052625 R15: 00007fff4dc63450
----------------
Code disassembly (best guess):
0: df 5b 41 fistps 0x41(%rbx)
3: 5e pop %rsi
4: e9 ef 92 97 f7 jmp 0xf79792f8
9: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
10: 00 00 00
13: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
18: 53 push %rbx
19: 48 89 fb mov %rdi,%rbx
1c: 48 83 c7 18 add $0x18,%rdi
20: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
25: e8 0e bf 96 f7 call 0xf796bf38
* 2a: 48 89 df mov %rbx,%rdi <-- trapping instruction
2d: e8 46 97 97 f7 call 0xf7979778
32: bf 01 00 00 00 mov $0x1,%edi
37: e8 2c 9e 8b f7 call 0xf78b9e68
3c: 65 gs
3d: 8b .byte 0x8b
3e: 05 .byte 0x5
3f: 4d rex.WRB