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verifier bug: error during ctx access conversion (0)(1)
WARNING: CPU: 0 PID: 5353 at kernel/bpf/verifier.c:21448 convert_ctx_accesses kernel/bpf/verifier.c:21448 [inline]
WARNING: CPU: 0 PID: 5353 at kernel/bpf/verifier.c:21448 bpf_check+0x1b6ed/0x1d2d0 kernel/bpf/verifier.c:24739
Modules linked in:
CPU: 0 UID: 0 PID: 5353 Comm: syz.0.0 Not tainted syzkaller #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 kernel/bpf/verifier.c:21448 [inline]
RIP: 0010:bpf_check+0x1b6ed/0x1d2d0 kernel/bpf/verifier.c:24739
Code: 2b af ff 90 0f 0b 90 90 e9 6d 60 ff ff e8 4b 9c eb ff c6 05 d6 72 b9 0d 01 90 48 c7 c7 60 fb 91 8b 44 89 f6 e8 24 2b af ff 90 <0f> 0b 90 90 e9 af bd ff ff e8 25 9c eb ff c6 05 b5 72 b9 0d 01 90
RSP: 0018:ffffc9000d3ef600 EFLAGS: 00010246
RAX: 99dd815d8d8a5700 RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000e22a000 RSI: 00000000000029d5 RDI: 00000000000029d6
RBP: ffffc9000d3efb50 R08: ffff88801fc24253 R09: 1ffff11003f8484a
R10: dffffc0000000000 R11: ffffed1003f8484b R12: ffffc9000061e052
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000004
FS:  00007f09ba44e6c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09b97acbe0 CR3: 00000000361d4000 CR4: 0000000000352ef0
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: 0033:0x7f09b958ebe9
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:00007f09ba44e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f09b97b5fa0 RCX: 00007f09b958ebe9
RDX: 0000000000000080 RSI: 0000200000000300 RDI: 0000000000000005
RBP: 00007f09b9611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f09b97b6038 R14: 00007f09b97b5fa0 R15: 00007ffd895cdc58
 </TASK>