------------[ cut here ]------------ verifier backtracking bug WARNING: CPU: 0 PID: 5083 at kernel/bpf/verifier.c:3714 backtrack_insn kernel/bpf/verifier.c:3714 [inline] WARNING: CPU: 0 PID: 5083 at kernel/bpf/verifier.c:3714 __mark_chain_precision+0x7027/0x7520 kernel/bpf/verifier.c:4255 Modules linked in: CPU: 0 PID: 5083 Comm: syz-executor159 Not tainted 6.9.0-rc4-syzkaller-00266-g977b1ef51866 #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 dd 4f b0 ff 90 0f 0b 90 90 e9 7d f2 ff ff e8 4e d3 ed ff c6 05 87 47 eb 0d 01 90 48 c7 c7 80 b5 d0 8b e8 ba 4f b0 ff 90 <0f> 0b 90 90 e9 5a f2 ff ff e8 2b d3 ed ff c6 05 65 47 eb 0d 01 90 RSP: 0018:ffffc90002efeac0 EFLAGS: 00010246 RAX: 62bd100ebc496b00 RBX: ffff88801ebb5600 RCX: ffff88801c305a00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002efed10 R08: ffffffff81588072 R09: 1ffff1101728519a R10: dffffc0000000000 R11: ffffed101728519b R12: 0000000080000000 R13: 0000000000000010 R14: 0000000000000001 R15: ffff88801ebb0000 FS: 000055555b3ff380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9e893f1b10 CR3: 000000007b332000 CR4: 0000000000350ef0 Call Trace: mark_chain_precision kernel/bpf/verifier.c:4358 [inline] check_return_code+0xbe0/0x11e0 kernel/bpf/verifier.c:15520 do_check+0xb962/0x10740 kernel/bpf/verifier.c:17887 do_check_common+0x14bd/0x1dd0 kernel/bpf/verifier.c:20516 do_check_main kernel/bpf/verifier.c:20607 [inline] bpf_check+0x126eb/0x18fe0 kernel/bpf/verifier.c:21277 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2895 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5660 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline] __se_sys_bpf kernel/bpf/syscall.c:5765 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5765 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8e9b390469 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:00007fffd6b60458 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fffd6b60638 RCX: 00007f8e9b390469 RDX: 0000000000000090 RSI: 0000000020000600 RDI: 0000000000000005 RBP: 00007f8e9b403610 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffd6b60628 R14: 0000000000000001 R15: 0000000000000001