loop0: detected capacity change from 0 to 128 VFS: Found a Xenix FS (block size = 512) on device loop0 loop0: detected capacity change from 128 to 0 sysv_free_block: trying to free block not in datazone syz.0.0: attempt to access beyond end of device loop0: rw=0, sector=13662976, nr_sectors = 1 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=0, sector=8073605, nr_sectors = 1 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=0, sector=3245521, nr_sectors = 1 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=2, nr_sectors = 1 limit=0 Buffer I/O error on dev loop0, logical block 2, lost sync page write IO error syncing sysv inode [loop0:00000002] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5319 at fs/buffer.c:1173 mark_buffer_dirty+0x2c6/0x440 fs/buffer.c:1173 Modules linked in: CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.13.0-rc3-syzkaller-00044-gaef25be35d23 #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:mark_buffer_dirty+0x2c6/0x440 fs/buffer.c:1173 Code: 4c 89 f7 e8 7c 54 dc ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 97 de fb ff e8 b2 eb 75 ff eb 8b e8 ab eb 75 ff 90 <0f> 0b 90 e9 82 fd ff ff e8 9d eb 75 ff 90 0f 0b 90 e9 a9 fd ff ff RSP: 0018:ffffc9000d40f488 EFLAGS: 00010283 RAX: ffffffff82298845 RBX: ffff888043c24801 RCX: 0000000000100000 RDX: ffffc9000e55a000 RSI: 00000000000000f1 RDI: 00000000000000f2 RBP: 0000000000000000 R08: ffffffff822985c3 R09: 1ffff1100874eacb R10: dffffc0000000000 R11: ffffed100874eacc R12: 000000000000000d R13: ffff888043c2480c R14: ffff888043a75658 R15: dffffc0000000000 FS: 00007f668f3786c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020004000 CR3: 0000000035eba000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dirty_sb fs/sysv/sysv.h:117 [inline] sysv_new_block+0x607/0x970 fs/sysv/balloc.c:150 alloc_branch fs/sysv/itree.c:135 [inline] get_block+0x30a/0x16d0 fs/sysv/itree.c:254 __block_write_begin_int+0x692/0x19a0 fs/buffer.c:2116 block_write_begin+0x8f/0x120 fs/buffer.c:2226 sysv_write_begin+0x31/0x70 fs/sysv/itree.c:490 generic_perform_write+0x346/0x990 mm/filemap.c:4055 generic_file_write_iter+0xae/0x310 mm/filemap.c:4182 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1050 do_pwritev fs/read_write.c:1146 [inline] __do_sys_pwritev fs/read_write.c:1192 [inline] __se_sys_pwritev fs/read_write.c:1187 [inline] __x64_sys_pwritev+0x1b7/0x2d0 fs/read_write.c:1187 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: 0033:0x7f668e585d29 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:00007f668f378038 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 RAX: ffffffffffffffda RBX: 00007f668e775fa0 RCX: 00007f668e585d29 RDX: 0000000000000003 RSI: 0000000020000980 RDI: 0000000000000003 RBP: 00007f668e601a20 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f668e775fa0 R15: 00007ffcfd5ccd58