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verifier bug: error during ctx access conversion(1)
WARNING: CPU: 1 PID: 10888 at kernel/bpf/verifier.c:21448 convert_ctx_accesses kernel/bpf/verifier.c:21448 [inline]
WARNING: CPU: 1 PID: 10888 at kernel/bpf/verifier.c:21448 bpf_check+0x1b6ec/0x1d2d0 kernel/bpf/verifier.c:24736
Modules linked in:
CPU: 1 UID: 0 PID: 10888 Comm: syz.1.1565 Not tainted 6.16.0-syzkaller-g93acc0f43f58 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:convert_ctx_accesses kernel/bpf/verifier.c:21448 [inline]
RIP: 0010:bpf_check+0x1b6ec/0x1d2d0 kernel/bpf/verifier.c:24736
Code: 8b e8 88 65 af ff 90 0f 0b 90 90 e9 6b 60 ff ff e8 29 be eb ff c6 05 eb b4 b6 0d 01 90 48 c7 c7 c0 f5 91 8b e8 65 65 af ff 90 <0f> 0b 90 90 e9 b5 bd ff ff e8 06 be eb ff c6 05 cd b4 b6 0d 01 90
RSP: 0018:ffffc90003447600 EFLAGS: 00010246
RAX: eba30ed823eec100 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9001ab67000 RSI: 000000000000524d RDI: 000000000000524e
RBP: ffffc90003447b50 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: ffffc9000342b052
R13: dffffc0000000000 R14: ffff8880434d8000 R15: 0000000000000004
FS:  00007fd18d61e6c0(0000) GS:ffff888125d76000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd18c9b7bac CR3: 000000007dfc2000 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:2979
 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6029
 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137
 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: 0033:0x7fd18c78eb69
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:00007fd18d61e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fd18c9b5fa0 RCX: 00007fd18c78eb69
RDX: 0000000000000094 RSI: 0000200000000300 RDI: 0000000000000005
RBP: 00007fd18c811df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fd18c9b5fa0 R15: 00007ffe2736e4b8
 </TASK>