------------[ cut here ]------------
WARNING: CPU: 0 PID: 9383 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 9383 Comm: kworker/u4:9 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: netns cleanup_net
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:ffffc90000006ec8 EFLAGS: 00010246
RAX: ffffffff81a08ea0 RBX: 0000000000000000 RCX: ffff88801dacbb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc900000072f7 R09: ffffc900000072c4
R10: dffffc0000000000 R11: fffff52000000e5f R12: ffff88801dacd308
R13: ffffc9000120c030 R14: ffffc90000006f28 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32823ffc CR3: 000000005f45c000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 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+0x32/0xce8
 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+0x792/0x60b0 net/core/flow_dissector.c:1024
 skb_flow_dissect_flow_keys include/linux/skbuff.h:1390 [inline]
 ___skb_get_hash+0x55/0x680 net/core/flow_dissector.c:1583
 __skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1648
 skb_get_hash include/linux/skbuff.h:1432 [inline]
 skb_tx_hash net/core/dev.c:3243 [inline]
 netdev_pick_tx+0x335/0xad0 net/core/dev.c:4140
 netdev_core_pick_tx+0x12e/0x2e0 net/core/dev.c:4173
 __dev_queue_xmit+0x756/0x2fd0 net/core/dev.c:4248
 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: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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:13 [inline]
RIP: 0010:lock_acquire+0x388/0x400 kernel/locking/lockdep.c:5594
Code: 00 44 89 f0 c1 e8 06 48 8d 3c c5 a8 d8 89 8d be 08 00 00 00 e8 b9 1f 61 00 44 89 f0 48 0f a3 05 06 d3 2c 0c 0f 83 48 fd ff ff <65> ff 05 19 6a a5 7e 4c 8b 35 32 6c 19 0c 4d 85 f6 74 40 49 83 c6
RSP: 0018:ffffc900031ef900 EFLAGS: 00000257
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815d0597
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d89d8a8
RBP: ffffc900031efa20 R08: ffffffff8d89d8af R09: 1ffffffff1b13b15
R10: dffffc0000000000 R11: fffffbfff1b13b16 R12: ffffffff8c31eaa0
R13: 1ffff9200063df2c R14: 0000000000000000 R15: dffffc0000000000
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
 rcu_read_lock include/linux/rcupdate.h:740 [inline]
 inet_twsk_purge+0x119/0x840 net/ipv4/inet_timewait_sock.c:268
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x791/0xba0 net/core/net_namespace.c:635
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 44 89 f0          	add    %al,-0x10(%rcx,%rcx,4)
   4:	c1 e8 06             	shr    $0x6,%eax
   7:	48 8d 3c c5 a8 d8 89 	lea    -0x72762758(,%rax,8),%rdi
   e:	8d
   f:	be 08 00 00 00       	mov    $0x8,%esi
  14:	e8 b9 1f 61 00       	call   0x611fd2
  19:	44 89 f0             	mov    %r14d,%eax
  1c:	48 0f a3 05 06 d3 2c 	bt     %rax,0xc2cd306(%rip)        # 0xc2cd32a
  23:	0c
  24:	0f 83 48 fd ff ff    	jae    0xfffffd72
* 2a:	65 ff 05 19 6a a5 7e 	incl   %gs:0x7ea56a19(%rip)        # 0x7ea56a4a <-- trapping instruction
  31:	4c 8b 35 32 6c 19 0c 	mov    0xc196c32(%rip),%r14        # 0xc196c6a
  38:	4d 85 f6             	test   %r14,%r14
  3b:	74 40                	je     0x7d
  3d:	49                   	rex.WB
  3e:	83                   	.byte 0x83
  3f:	c6                   	.byte 0xc6