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WARNING: CPU: 0 PID: 5108 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 5108 Comm: syz.2.725 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:ffffc900000072e0 EFLAGS: 00010246
RAX: ffffffff819ed980 RBX: 0000000000000000 RCX: ffff88807ef33b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff5419
R10: fffffbfff1ff5419 R11: 1ffffffff1ff5418 R12: ffff88807ef35308
R13: dffffc0000000000 R14: ffffc90000007340 R15: 0000000000000000
FS:  000055557c01e500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000c00 CR3: 000000005cdfb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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_690f12e098ef46de+0x32/0xd9c
 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_prog_run_clear_cb+0x94/0x1a0 include/linux/filter.h:806
 run_filter+0x12a/0x220 net/packet/af_packet.c:2101
 packet_rcv+0x388/0x1210 net/packet/af_packet.c:2174
 dev_queue_xmit_nit+0xa69/0xb00 net/core/dev.c:2373
 xmit_one net/core/dev.c:3644 [inline]
 dev_hard_start_xmit+0x13e/0x7e0 net/core/dev.c:3665
 __dev_queue_xmit+0x19df/0x2ed0 net/core/dev.c:4288
 neigh_hh_output include/net/neighbour.h:493 [inline]
 neigh_output include/net/neighbour.h:507 [inline]
 ip6_finish_output2+0x1035/0x1500 net/ipv6/ip6_output.c:130
 dst_output include/net/dst.h:452 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xbea/0x14a0 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3956
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:unwind_next_frame+0x11a3/0x1d90 arch/x86/kernel/unwind_orc.c:609
Code: 84 c0 0f 85 30 08 00 00 8b 44 24 7c 39 03 0f 85 ff 00 00 00 48 8b 44 24 40 42 80 3c 28 00 74 0a 48 8b 7c 24 38 e8 6d aa 87 00 <4c> 8b 7b 38 48 8d 7b 08 48 89 f8 48 c1 e8 03 42 80 3c 28 00 74 05
RSP: 0018:ffffc9000303f828 EFLAGS: 00000246
RAX: 1ffff92000607f24 RBX: ffffc9000303f8e8 RCX: 0000000000000001
RDX: ffffc9000303f928 RSI: ffffc9000303fa10 RDI: ffffc9000303fa10
RBP: ffffc9000303f930 R08: dffffc0000000000 R09: ffffc9000303f938
R10: fffff52000607f29 R11: 1ffff92000607f27 R12: 1ffffffff1bccc4f
R13: dffffc0000000000 R14: ffffc9000303f938 R15: ffffffff8de66276
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 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]
 kmem_cache_free+0x8f/0x210 mm/slub.c:3520
 __dentry_kill+0x4ef/0x650 fs/dcache.c:600
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 __fput+0x5ee/0x930 fs/file_table.c:319
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb61530e749
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:00007fff3300a8a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000013450 RCX: 00007fb61530e749
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000001 R09: 000000033300ab9f
R10: 0000001b30d20000 R11: 0000000000000246 R12: 00007fb615564fac
R13: 00007fb615564fa0 R14: ffffffffffffffff R15: 0000000000000005
 </TASK>
----------------
Code disassembly (best guess):
   0:	84 c0                	test   %al,%al
   2:	0f 85 30 08 00 00    	jne    0x838
   8:	8b 44 24 7c          	mov    0x7c(%rsp),%eax
   c:	39 03                	cmp    %eax,(%rbx)
   e:	0f 85 ff 00 00 00    	jne    0x113
  14:	48 8b 44 24 40       	mov    0x40(%rsp),%rax
  19:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  1e:	74 0a                	je     0x2a
  20:	48 8b 7c 24 38       	mov    0x38(%rsp),%rdi
  25:	e8 6d aa 87 00       	call   0x87aa97
* 2a:	4c 8b 7b 38          	mov    0x38(%rbx),%r15 <-- trapping instruction
  2e:	48 8d 7b 08          	lea    0x8(%rbx),%rdi
  32:	48 89 f8             	mov    %rdi,%rax
  35:	48 c1 e8 03          	shr    $0x3,%rax
  39:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  3e:	74 05                	je     0x45