syzbot

VFS: Found a Xenix FS (block size = 1024) on device loop0
syz-executor147: attempt to access beyond end of device
loop0: rw=0, sector=6491536, nr_sectors = 2 limit=128
Buffer I/O error on dev loop0, logical block 3245768, async page read
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4244 at fs/inode.c:389 inc_nlink+0x120/0x130
Modules linked in:
CPU: 1 PID: 4244 Comm: syz-executor147 Not tainted 6.1.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:inc_nlink+0x120/0x130 fs/inode.c:389
Code: ea ff e9 37 ff ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 49 ff ff ff 4c 89 ef e8 6a 04 ea ff e9 3c ff ff ff e8 c0 82 92 ff <0f> 0b eb 80 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 53 48
RSP: 0018:ffffc90003b5fd40 EFLAGS: 00010293
RAX: ffffffff81f810a0 RBX: 1ffff1100dc03810 RCX: ffff88802f8e5940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81f8101a R09: ffffed1002fc2b57
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88806e01c080 R14: ffff88806e01c038 R15: 0000000000000000
FS:  0000555587d8b380(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557c00f00368 CR3: 0000000073b61000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_inc_link_count include/linux/fs.h:2576 [inline]
 sysv_mkdir+0x1d/0x120 fs/sysv/namei.c:119
 vfs_mkdir+0x3b6/0x590 fs/namei.c:4106
 do_mkdirat+0x225/0x360 fs/namei.c:4131
 __do_sys_mkdir fs/namei.c:4151 [inline]
 __se_sys_mkdir fs/namei.c:4149 [inline]
 __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4149
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff05c3ba639
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 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:00007ffe41316a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffe41316c08 RCX: 00007ff05c3ba639
RDX: 00007ff05c3b9930 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007ff05c437610 R08: 0000000000009e89 R09: 0000000000000000
R10: 00007ffe413168f0 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe41316bf8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>