Hello, syzbot found the following issue on: HEAD commit: d7b8f8e20813 Linux 6.16-rc5 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=107e728c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=72aa0474e3c3b9ac dashboard link: https://syzkaller.appspot.com/bug?extid=895c23f6917da440ed0d compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11305582580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10952bd4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/605b3edeb031/disk-d7b8f8e2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a3cb6f3ea4a9/vmlinux-d7b8f8e2.xz kernel image: https://storage.googleapis.com/syzbot-assets/cd9e0c6a9926/bzImage-d7b8f8e2.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/2a7ab270a8da/mount_0.gz The issue was bisected to: commit af153bb63a336a7ca0d9c8ef4ca98119c5020030 Author: Mateusz Guzik <mjguzik@xxxxxxxxx> Date: Sun Feb 9 18:55:21 2025 +0000 vfs: catch invalid modes in may_open() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17f94a8c580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=14054a8c580000 console output: https://syzkaller.appspot.com/x/log.txt?x=10054a8c580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+895c23f6917da440ed0d@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: af153bb63a33 ("vfs: catch invalid modes in may_open()") VFS_BUG_ON_INODE(!IS_ANON_FILE(inode)) encountered for inode ffff8880724735b8 ------------[ cut here ]------------ kernel BUG at fs/namei.c:3483! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 5842 Comm: syz-executor360 Not tainted 6.16.0-rc5-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:may_open+0x4b1/0x4c0 fs/namei.c:3483 Code: 38 c1 0f 8c 1e fd ff ff 4c 89 e7 e8 69 25 ec ff e9 11 fd ff ff e8 9f cd 8a ff 4c 89 f7 48 c7 c6 40 40 99 8b e8 70 cb f2 fe 90 <0f> 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc90003f87940 EFLAGS: 00010246 RAX: 000000000000004d RBX: dffffc0000000000 RCX: 158c895b4c6f3300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000109042 R08: ffffc90003f87667 R09: 1ffff920007f0ecc R10: dffffc0000000000 R11: fffff520007f0ecd R12: 0000000000000000 R13: ffffffff8e29ca80 R14: ffff8880724735b8 R15: 0000000000000006 FS: 000055555ad6e380(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f084598dd30 CR3: 0000000073c6a000 CR4: 00000000003526f0 Call Trace: <TASK> do_open fs/namei.c:3894 [inline] path_openat+0x2d91/0x3830 fs/namei.c:4055 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_open fs/open.c:1460 [inline] __se_sys_open fs/open.c:1456 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1456 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: 0033:0x7ffa1ddded59 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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:00007ffcaa4b44f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffa1ddded59 RDX: 0000000000000000 RSI: 0000000000109042 RDI: 0000200000000000 RBP: 00007ffa1de725f0 R08: 000000000001f1b6 R09: 000055555ad6f4c0 R10: 00007ffcaa4b43c0 R11: 0000000000000246 R12: 00007ffcaa4b4520 R13: 00007ffcaa4b4748 R14: 431bde82d7b634db R15: 00007ffa1de2803b </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:may_open+0x4b1/0x4c0 fs/namei.c:3483 Code: 38 c1 0f 8c 1e fd ff ff 4c 89 e7 e8 69 25 ec ff e9 11 fd ff ff e8 9f cd 8a ff 4c 89 f7 48 c7 c6 40 40 99 8b e8 70 cb f2 fe 90 <0f> 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc90003f87940 EFLAGS: 00010246 RAX: 000000000000004d RBX: dffffc0000000000 RCX: 158c895b4c6f3300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000109042 R08: ffffc90003f87667 R09: 1ffff920007f0ecc R10: dffffc0000000000 R11: fffff520007f0ecd R12: 0000000000000000 R13: ffffffff8e29ca80 R14: ffff8880724735b8 R15: 0000000000000006 FS: 000055555ad6e380(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f084598dd30 CR3: 0000000073c6a000 CR4: 00000000003526f0 --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
