loop0: detected capacity change from 0 to 128 VFS: Found a Xenix FS (block size = 1024) on device loop0 syz.0.0: 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 syz.0.0: 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 syz.0.0: 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 syz.0.0: 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: 0 PID: 5324 at fs/inode.c:464 inc_nlink+0x127/0x150 fs/inode.c:464 Modules linked in: CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-00233-g9fb2cfa4635a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:inc_nlink+0x127/0x150 fs/inode.c:464 Code: ff e9 35 ff ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 47 ff ff ff 4c 89 ef e8 c4 d6 e5 ff e9 3a ff ff ff e8 3a f0 7b ff 90 <0f> 0b 90 e9 7b ff ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 49 RSP: 0018:ffffc9000d11fd30 EFLAGS: 00010283 RAX: ffffffff821900d6 RBX: 1ffff110087d2810 RCX: 0000000000040000 RDX: ffffc9000d4f9000 RSI: 0000000000000803 RDI: 0000000000000804 RBP: 0000000000000000 R08: ffffffff82190050 R09: 1ffff1100359a3a0 R10: dffffc0000000000 R11: ffffffff82c8a1f0 R12: dffffc0000000000 R13: ffff888043e94080 R14: ffff888043e94038 R15: 0000000000000000 FS: 00007f23215fe6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2317dbd000 CR3: 0000000043b8a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inode_inc_link_count include/linux/fs.h:2515 [inline] sysv_mkdir+0x21/0x130 fs/sysv/namei.c:119 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4311 do_mkdirat+0x264/0x3a0 fs/namei.c:4334 __do_sys_mkdirat fs/namei.c:4349 [inline] __se_sys_mkdirat fs/namei.c:4347 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4347 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: 0033:0x7f2321b7cff7 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:00007f23215fde68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f23215fdef0 RCX: 00007f2321b7cff7 RDX: 00000000000001ff RSI: 0000000020000000 RDI: 00000000ffffff9c RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00007f23215fdeb0 R14: 0000000000000000 R15: 0000000000000000