loop0: detected capacity change from 0 to 65536 xfs: Unknown parameter 'mtpt' 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 unable to read i-node block 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 sysv_free_inode: unable to read inode block 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 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5328 at fs/inode.c:393 inc_nlink+0x127/0x150 fs/inode.c:393 Modules linked in: CPU: 0 UID: 0 PID: 5328 Comm: syz.0.0 Not tainted 6.12.0-rc6-syzkaller-00169-g906bd684e4b1 #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:393 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 14 0b e6 ff e9 3a ff ff ff e8 3a 45 7c 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:ffffc9000d44fd30 EFLAGS: 00010287 RAX: ffffffff82189526 RBX: 1ffff110087e8810 RCX: 0000000000040000 RDX: ffffc9000de21000 RSI: 00000000000007f9 RDI: 00000000000007fa RBP: 0000000000000000 R08: ffffffff821894a0 R09: 1ffff1100359a3a0 R10: dffffc0000000000 R11: ffffffff82c7b3a0 R12: dffffc0000000000 R13: ffff888043f44080 R14: ffff888043f44038 R15: 0000000000000000 FS: 00007fd419ffe6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fe1484d8f0 CR3: 00000000435a0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inode_inc_link_count include/linux/fs.h:2504 [inline] sysv_mkdir+0x21/0x130 fs/sysv/namei.c:119 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4257 do_mkdirat+0x264/0x3a0 fs/namei.c:4280 __do_sys_mkdirat fs/namei.c:4295 [inline] __se_sys_mkdirat fs/namei.c:4293 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4293 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: 0033:0x7fd41a57e719 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:00007fd419ffe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007fd41a735f80 RCX: 00007fd41a57e719 RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007fd41a5f139e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd41a735f80 R15: 00007ffc71693338