------------[ cut here ]------------
WARNING: CPU: 1 PID: 4171 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4171 Comm: syz-executor 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:ffffc90000dd09a0 EFLAGS: 00010046
RAX: ffffffff819ed740 RBX: 0000000000000008 RCX: ffff88807bf09dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7619
R10: fffffbfff1ff7619 R11: 1ffffffff1ff7618 R12: ffff88807bf0b548
R13: 1ffff920001ba144 R14: ffffc90000dd0a08 R15: 0000000000000000
FS:  0000555592541500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe47585bf8 CR3: 000000001f21d000 CR4: 00000000003506e0
DR0: 0000200000000380 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 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_02073d59a3c0f06f+0x3d/0x808
 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_run3+0x17e/0x320 kernel/trace/bpf_trace.c:1916
 __traceiter_workqueue_queue_work+0x77/0xd0 include/trace/events/workqueue.h:23
 trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
 __queue_work+0xcee/0xd50 kernel/workqueue.c:1512
 call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1491 [inline]
 __run_timers+0x550/0x7c0 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:free_tail_pages_check+0x148/0x220 mm/page_alloc.c:1248
Code: 00 bd 01 00 00 00 eb 45 4c 8d 7b 08 4d 89 fd 49 c1 ed 03 43 80 7c 25 00 00 74 08 4c 89 ff e8 7f ea 08 00 49 f7 07 01 00 00 00 <74> 6e 43 80 7c 25 00 00 74 08 4c 89 ff e8 66 ea 08 00 49 8b 07 48
RSP: 0018:ffffc90002ddf580 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffffea0000aa5a80 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffea0000aa5a80 RDI: ffffea0000aa5a00
RBP: 0000000000000003 R08: dffffc0000000000 R09: fffff94000154b4f
R10: fffff94000154b4f R11: 1ffffd4000154b4e R12: dffffc0000000000
R13: 1ffffd4000154b51 R14: ffffea0000aa5a00 R15: ffffea0000aa5a88
 free_pages_prepare mm/page_alloc.c:1321 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0x4f9/0x6c0 mm/page_alloc.c:3317
 free_unref_page+0x94/0x280 mm/page_alloc.c:3396
 put_page include/linux/mm.h:1258 [inline]
 __skb_frag_unref include/linux/skbuff.h:3254 [inline]
 skb_release_data+0x3fa/0x850 net/core/skbuff.c:672
 skb_release_all net/core/skbuff.c:742 [inline]
 __kfree_skb+0x4c/0x60 net/core/skbuff.c:756
 sk_eat_skb include/net/sock.h:2742 [inline]
 tcp_recvmsg_locked+0x14d5/0x2760 net/ipv4/tcp.c:2517
 tcp_recvmsg+0x350/0x710 net/ipv4/tcp.c:2563
 inet_recvmsg+0x136/0x1e0 net/ipv4/af_inet.c:868
 sock_recvmsg_nosec net/socket.c:966 [inline]
 sock_recvmsg net/socket.c:984 [inline]
 sock_read_iter+0x2a2/0x340 net/socket.c:1057
 call_read_iter include/linux/fs.h:2166 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x725/0xcf0 fs/read_write.c:485
 ksys_read+0x14d/0x250 fs/read_write.c:623
 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: 0033:0x7fdb3f6b35bd
Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb b5 e8 a8 48 00 00 0f 1f 84 00 00 00 00 00 80 3d a1 af 20 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec
RSP: 002b:00007ffec4ac0898 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fdb3f6b35bd
RDX: 000000000000270c RSI: 00005555925634a0 RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000000000008c R09: 0009914092403070
R10: 00000049c42bb3fa R11: 0000000000000246 R12: 00007ffec4ac0cc0
R13: 000000000000270c R14: 00005555925634a0 R15: 00007ffec4ac0940
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 bd 01 00 00 00    	add    %bh,0x1(%rbp)
   6:	eb 45                	jmp    0x4d
   8:	4c 8d 7b 08          	lea    0x8(%rbx),%r15
   c:	4d 89 fd             	mov    %r15,%r13
   f:	49 c1 ed 03          	shr    $0x3,%r13
  13:	43 80 7c 25 00 00    	cmpb   $0x0,0x0(%r13,%r12,1)
  19:	74 08                	je     0x23
  1b:	4c 89 ff             	mov    %r15,%rdi
  1e:	e8 7f ea 08 00       	call   0x8eaa2
  23:	49 f7 07 01 00 00 00 	testq  $0x1,(%r15)
* 2a:	74 6e                	je     0x9a <-- trapping instruction
  2c:	43 80 7c 25 00 00    	cmpb   $0x0,0x0(%r13,%r12,1)
  32:	74 08                	je     0x3c
  34:	4c 89 ff             	mov    %r15,%rdi
  37:	e8 66 ea 08 00       	call   0x8eaa2
  3c:	49 8b 07             	mov    (%r15),%rax
  3f:	48                   	rex.W