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verifier bug: error during ctx access conversion(1)
WARNING: kernel/bpf/verifier.c:21405 at convert_ctx_accesses kernel/bpf/verifier.c:21405 [inline], CPU#1: syz.1.1955/12911
WARNING: kernel/bpf/verifier.c:21405 at bpf_check+0x1b6ec/0x1d2e0 kernel/bpf/verifier.c:24690, CPU#1: syz.1.1955/12911
Modules linked in:
CPU: 1 UID: 0 PID: 12911 Comm: syz.1.1955 Not tainted 6.16.0-rc5-next-20250711-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:convert_ctx_accesses kernel/bpf/verifier.c:21405 [inline]
RIP: 0010:bpf_check+0x1b6ec/0x1d2e0 kernel/bpf/verifier.c:24690
Code: 8b e8 68 6f af ff 90 0f 0b 90 90 e9 6b 60 ff ff e8 a9 a6 eb ff c6 05 a3 8b b9 0d 01 90 48 c7 c7 40 01 92 8b e8 45 6f af ff 90 <0f> 0b 90 90 e9 b5 bd ff ff e8 86 a6 eb ff c6 05 85 8b b9 0d 01 90
RSP: 0018:ffffc900038cf600 EFLAGS: 00010246
RAX: b01ad75d149dcf00 RBX: 0000000000000004 RCX: 0000000000080000
RDX: ffffc9000d486000 RSI: 0000000000003c73 RDI: 0000000000003c74
RBP: ffffc900038cfb50 R08: ffff8880b8724293 R09: 1ffff110170e4852
R10: dffffc0000000000 R11: ffffed10170e4853 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888062dc0000 R15: dffffc0000000000
FS:  00007fae1647a6c0(0000) GS:ffff888125cc6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005fdbc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2972
 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:5996
 __do_sys_bpf kernel/bpf/syscall.c:6106 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6104 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6104
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae1558e929
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:00007fae1647a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fae157b6160 RCX: 00007fae1558e929
RDX: 0000000000000094 RSI: 0000200000000880 RDI: 0000000000000005
RBP: 00007fae15610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fae157b6160 R15: 00007ffd7ba3ba88
 </TASK>