------------[ cut here ]------------ verifier backtracking bug WARNING: CPU: 1 PID: 5065 at kernel/bpf/verifier.c:3714 backtrack_insn kernel/bpf/verifier.c:3714 [inline] WARNING: CPU: 1 PID: 5065 at kernel/bpf/verifier.c:3714 __mark_chain_precision+0x7027/0x7520 kernel/bpf/verifier.c:4255 Modules linked in: CPU: 1 PID: 5065 Comm: syz-executor227 Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:backtrack_insn kernel/bpf/verifier.c:3714 [inline] RIP: 0010:__mark_chain_precision+0x7027/0x7520 kernel/bpf/verifier.c:4255 Code: 8b e8 5d f0 b0 ff 90 0f 0b 90 90 e9 7d f2 ff ff e8 3e 17 ee ff c6 05 63 74 ca 0d 01 90 48 c7 c7 80 aa b0 8b e8 3a f0 b0 ff 90 <0f> 0b 90 90 e9 5a f2 ff ff e8 1b 17 ee ff c6 05 41 74 ca 0d 01 90 RSP: 0018:ffffc90003936ac0 EFLAGS: 00010246 RAX: a69d797a9286f500 RBX: ffff88807ae45600 RCX: ffff8880219e0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003936d10 R08: ffffffff8157cc12 R09: 1ffff110172a51a2 R10: dffffc0000000000 R11: ffffed10172a51a3 R12: 0000000080000000 R13: 0000000000000010 R14: 0000000000000001 R15: ffff88807ae40000 FS: 000055559100f380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000031bcc388 CR3: 0000000074486000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_chain_precision kernel/bpf/verifier.c:4358 [inline] check_return_code+0xbe0/0x11e0 kernel/bpf/verifier.c:15500 do_check+0xb91f/0x10500 kernel/bpf/verifier.c:17867 do_check_common+0x14bd/0x1dd0 kernel/bpf/verifier.c:20492 do_check_main kernel/bpf/verifier.c:20583 [inline] bpf_check+0x136ab/0x19010 kernel/bpf/verifier.c:21253 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2895 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5631 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5736 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fbc471ef469 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe43f39548 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ffe43f39728 RCX: 00007fbc471ef469 RDX: 0000000000000090 RSI: 0000000020000600 RDI: 0000000000000005 RBP: 00007fbc47262610 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe43f39718 R14: 0000000000000001 R15: 0000000000000001