Hello, syzbot found the following issue on: HEAD commit: 69b8923f5003 Merge tag 'for-linus-6.14-ofs4' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=117c3ddf980000 kernel config: https://syzkaller.appspot.com/x/.config?x=57ab43c279fa614d dashboard link: https://syzkaller.appspot.com/bug?extid=1facc65919790d188467 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=149d95f8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ea84ac864e92/disk-69b8923f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6a465997b4e0/vmlinux-69b8923f.xz kernel image: https://storage.googleapis.com/syzbot-assets/d72b67b2bd15/bzImage-69b8923f.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/16b90949171c/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1facc65919790d188467@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 32768 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 6297 Comm: syz.0.44 Not tainted 6.13.0-syzkaller-09793-g69b8923f5003 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:do_inode_permission fs/namei.c:523 [inline] RIP: 0010:inode_permission+0x62/0x460 fs/namei.c:592 Code: e3 02 48 89 5c 24 10 89 6c 24 0c 0f 85 cf 00 00 00 4d 89 e5 e8 ef c7 87 ff 4c 89 f5 4d 8d 66 02 4c 89 e3 48 c1 eb 03 4d 89 fe <42> 0f b6 04 3b 84 c0 0f 85 16 03 00 00 45 0f b7 3c 24 44 89 fe 83 RSP: 0018:ffffc900034379c0 EFLAGS: 00010246 RAX: ffffffff82379481 RBX: 0000000000000000 RCX: ffff88804d699e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8237945b R09: ffffffff8238fda6 R10: 0000000000000002 R11: ffff88804d699e00 R12: 0000000000000002 R13: ffffffff8ea8dbc0 R14: dffffc0000000000 R15: dffffc0000000000 FS: 00007f4ad8e416c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4acfbff000 CR3: 000000004c82c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> may_lookup fs/namei.c:1821 [inline] link_path_walk+0x204/0xea0 fs/namei.c:2427 path_parentat fs/namei.c:2683 [inline] __filename_parentat+0x2a7/0x740 fs/namei.c:2707 filename_parentat fs/namei.c:2725 [inline] filename_create+0xf6/0x540 fs/namei.c:4063 do_mkdirat+0xbd/0x3a0 fs/namei.c:4328 __do_sys_mkdirat fs/namei.c:4351 [inline] __se_sys_mkdirat fs/namei.c:4349 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4349 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4ad7f8b617 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f4ad8e40e68 EFLAGS: 00000202 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f4ad8e40ef0 RCX: 00007f4ad7f8b617 RDX: 00000000000001ff RSI: 0000000020000040 RDI: 00000000ffffff9c RBP: 0000000020000000 R08: 0000000000000000 R09: 0000000000005939 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000040 R13: 00007f4ad8e40eb0 R14: 000000000000593f R15: 0000000020000380 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_inode_permission fs/namei.c:523 [inline] RIP: 0010:inode_permission+0x62/0x460 fs/namei.c:592 Code: e3 02 48 89 5c 24 10 89 6c 24 0c 0f 85 cf 00 00 00 4d 89 e5 e8 ef c7 87 ff 4c 89 f5 4d 8d 66 02 4c 89 e3 48 c1 eb 03 4d 89 fe <42> 0f b6 04 3b 84 c0 0f 85 16 03 00 00 45 0f b7 3c 24 44 89 fe 83 RSP: 0018:ffffc900034379c0 EFLAGS: 00010246 RAX: ffffffff82379481 RBX: 0000000000000000 RCX: ffff88804d699e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8237945b R09: ffffffff8238fda6 R10: 0000000000000002 R11: ffff88804d699e00 R12: 0000000000000002 R13: ffffffff8ea8dbc0 R14: dffffc0000000000 R15: dffffc0000000000 FS: 00007f4ad8e416c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 ---------------- Code disassembly (best guess): 0: e3 02 jrcxz 0x4 2: 48 89 5c 24 10 mov %rbx,0x10(%rsp) 7: 89 6c 24 0c mov %ebp,0xc(%rsp) b: 0f 85 cf 00 00 00 jne 0xe0 11: 4d 89 e5 mov %r12,%r13 14: e8 ef c7 87 ff call 0xff87c808 19: 4c 89 f5 mov %r14,%rbp 1c: 4d 8d 66 02 lea 0x2(%r14),%r12 20: 4c 89 e3 mov %r12,%rbx 23: 48 c1 eb 03 shr $0x3,%rbx 27: 4d 89 fe mov %r15,%r14 * 2a: 42 0f b6 04 3b movzbl (%rbx,%r15,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 16 03 00 00 jne 0x34d 37: 45 0f b7 3c 24 movzwl (%r12),%r15d 3c: 44 89 fe mov %r15d,%esi 3f: 83 .byte 0x83 --- 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. 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
