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verifier bug: error during ctx access conversion(1)
WARNING: CPU: 0 PID: 6274 at kernel/bpf/verifier.c:21409 convert_ctx_accesses kernel/bpf/verifier.c:21409 [inline]
WARNING: CPU: 0 PID: 6274 at kernel/bpf/verifier.c:21409 bpf_check+0x1b6ec/0x1d2e0 kernel/bpf/verifier.c:24694
Modules linked in:
CPU: 0 UID: 0 PID: 6274 Comm: syz.4.100 Not tainted 6.16.0-rc3-syzkaller-gea2aecdf7a95 #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:21409 [inline]
RIP: 0010:bpf_check+0x1b6ec/0x1d2e0 kernel/bpf/verifier.c:24694
Code: 8b e8 68 4e af ff 90 0f 0b 90 90 e9 6b 60 ff ff e8 49 ab eb ff c6 05 83 1f b7 0d 01 90 48 c7 c7 c0 fb 91 8b e8 45 4e af ff 90 <0f> 0b 90 90 e9 b5 bd ff ff e8 26 ab eb ff c6 05 65 1f b7 0d 01 90
RSP: 0018:ffffc9000bf27600 EFLAGS: 00010246
RAX: 14b04048867b4900 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000d23c000 RSI: 0000000000011e3b RDI: 0000000000011e3c
RBP: ffffc9000bf27b50 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa04 R12: ffffc9000bf0905a
R13: dffffc0000000000 R14: ffff888077578000 R15: 0000000000000004
FS:  00007fbc103ac6c0(0000) GS:ffff888125c19000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5dd31fb220 CR3: 000000002a35a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2972
 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6004
 __do_sys_bpf kernel/bpf/syscall.c:6114 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6112 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6112
 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: 0033:0x7fbc0f58e929
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:00007fbc103ac038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fbc0f7b5fa0 RCX: 00007fbc0f58e929
RDX: 0000000000000090 RSI: 00002000000001c0 RDI: 0000000000000005
RBP: 00007fbc0f610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbc0f7b5fa0 R15: 00007ffcaafde7c8
 </TASK>