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verifier bug: error during ctx access conversion(1)
WARNING: CPU: 0 PID: 6379 at kernel/bpf/verifier.c:21448 convert_ctx_accesses+0x2045/0x2920 kernel/bpf/verifier.c:21448
Modules linked in:
CPU: 0 UID: 0 PID: 6379 Comm: syz.3.171 Not tainted 6.16.0-syzkaller-06699-ge8d780dcd957 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:convert_ctx_accesses+0x2045/0x2920 kernel/bpf/verifier.c:21448
Code: c7 c6 40 8d b5 8b e8 0a a3 07 00 e9 a4 f9 ff ff e8 70 60 e9 ff c6 05 f4 9d be 0e 01 90 48 c7 c7 a0 8d b5 8b e8 5c 49 a8 ff 90 <0f> 0b 90 90 e9 f1 fe ff ff e8 4d 60 e9 ff 0f b6 1d d4 9d be 0e 31
RSP: 0018:ffffc900010ef6d8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000d005000
RDX: 0000000000080000 RSI: ffffffff8179f5d5 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffc90002c56048 R14: 0000000000000004 R15: ffff88806e8b0000
FS:  0000000000000000(0000) GS:ffff88809752c000(0063) knlGS:00000000f5106b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f73d6188 CR3: 000000006c92a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bpf_check+0x5add/0xc480 kernel/bpf/verifier.c:24736
 bpf_prog_load+0xe41/0x2490 kernel/bpf/syscall.c:2972
 __sys_bpf+0x4a3f/0x4de0 kernel/bpf/syscall.c:6022
 __do_sys_bpf kernel/bpf/syscall.c:6132 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6130 [inline]
 __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:6130
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fe8579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f510655c EFLAGS: 00000296 ORIG_RAX: 0000000000000165
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000800054c0
RDX: 0000000000000048 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi