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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f83ec76bf285 Linux 6.17-rc6 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=137d0e42580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8f01d8629880e620 dashboard link: https://syzkaller.appspot.com/bug?extid=3afc814e8df1af64b653 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=104a947c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14467b62580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/be9b26c66bc1/disk-f83ec76b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/53dc5627e608/vmlinux-f83ec76b.xz kernel image: https://storage.googleapis.com/syzbot-assets/398506a67fd8/bzImage-f83ec76b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3afc814e8df1af64b653@syzkaller.appspotmail.com ------------[ cut here ]------------ verifier bug: scc exit: no visit info for call chain (1)(1) WARNING: CPU: 1 PID: 6013 at kernel/bpf/verifier.c:1949 maybe_exit_scc+0x768/0x8d0 kernel/bpf/verifier.c:1949 Modules linked in: CPU: 1 UID: 0 PID: 6013 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:maybe_exit_scc+0x768/0x8d0 kernel/bpf/verifier.c:1949 Code: ff ff e8 cb 8e e7 ff c6 05 0a b5 bf 0e 01 90 48 89 ee 48 89 df e8 f8 41 fb ff 48 c7 c7 a0 9b b5 8b 48 89 c6 e8 59 33 a6 ff 90 <0f> 0b 90 90 e9 4e ff ff ff e8 0a ee 4d 00 e9 7f f9 ff ff 4c 8b 4c RSP: 0018:ffffc900041bf500 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888079840000 RCX: ffffffff817a4388 RDX: ffff88807d3f8000 RSI: ffffffff817a4395 RDI: 0000000000000001 RBP: ffff888079846328 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff92000837ea7 R13: 0000000000000000 R14: ffff88805cf87400 R15: dffffc0000000000 FS: 000055557c9b5500(0000) GS:ffff8881247b2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557c9b5808 CR3: 0000000073b4d000 CR4: 00000000003526f0 Call Trace: update_branch_counts kernel/bpf/verifier.c:2040 [inline] do_check kernel/bpf/verifier.c:20135 [inline] do_check_common+0x20cc/0xb410 kernel/bpf/verifier.c:23264 do_check_main kernel/bpf/verifier.c:23347 [inline] bpf_check+0x869f/0xc670 kernel/bpf/verifier.c:24707 bpf_prog_load+0xe41/0x2490 kernel/bpf/syscall.c:2979 __sys_bpf+0x4a3f/0x4de0 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+0x78/0xc0 kernel/bpf/syscall.c:6137 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd1d078eba9 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:00007ffee0400aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fd1d09d5fa0 RCX: 00007fd1d078eba9 RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005 RBP: 00007fd1d0811e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd1d09d5fa0 R14: 00007fd1d09d5fa0 R15: 0000000000000003 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup