------------[ cut here ]------------ verifier backtracking bug WARNING: CPU: 0 PID: 5064 at kernel/bpf/verifier.c:3691 backtrack_insn kernel/bpf/verifier.c:3691 [inline] WARNING: CPU: 0 PID: 5064 at kernel/bpf/verifier.c:3691 __mark_chain_precision+0x3c4b/0x4d70 kernel/bpf/verifier.c:4232 Modules linked in: CPU: 0 PID: 5064 Comm: syz-executor352 Not tainted 6.7.0-rc6-syzkaller-01690-g92de776d2090 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:backtrack_insn kernel/bpf/verifier.c:3691 [inline] RIP: 0010:__mark_chain_precision+0x3c4b/0x4d70 kernel/bpf/verifier.c:4232 Code: ff 89 de e8 27 d8 ec ff 84 db 0f 85 60 cf ff ff e8 ea dc ec ff c6 05 65 9e 68 0d 01 90 48 c7 c7 a0 1b d4 8a e8 76 16 b3 ff 90 <0f> 0b 90 90 e9 42 cf ff ff 48 89 ee 48 c7 c7 80 d2 05 8d e8 ed 00 RSP: 0018:ffffc900039bf450 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814dbca9 RDX: ffff88801736d940 RSI: ffffffff814dbcb6 RDI: 0000000000000001 RBP: 0000000000000400 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000 FS: 0000555557216380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000d78388 CR3: 000000002792d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_chain_precision kernel/bpf/verifier.c:4335 [inline] check_return_code+0x8fa/0x11a0 kernel/bpf/verifier.c:15196 do_check kernel/bpf/verifier.c:17490 [inline] do_check_common+0xa68b/0xe8d0 kernel/bpf/verifier.c:19952 do_check_main kernel/bpf/verifier.c:20043 [inline] bpf_check+0x4fb0/0xa310 kernel/bpf/verifier.c:20680 bpf_prog_load+0x1534/0x2200 kernel/bpf/syscall.c:2753 __sys_bpf+0xbf7/0x4a00 kernel/bpf/syscall.c:5427 __do_sys_bpf kernel/bpf/syscall.c:5531 [inline] __se_sys_bpf kernel/bpf/syscall.c:5529 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5529 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f902bf6a469 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:00007ffe54dc73a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ffe54dc7588 RCX: 00007f902bf6a469 RDX: 0000000000000090 RSI: 0000000020000600 RDI: 0000000000000005 RBP: 00007f902bfdd610 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe54dc7578 R14: 0000000000000001 R15: 0000000000000001