loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): invalid journal inode EXT4-fs (loop0): can't get journal size EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. jffs2: notice: (5310) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found. loop0: detected capacity change from 512 to 64 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=130, nr_sectors = 24 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:364: I/O error 10 writing to inode 15 starting block 65) Buffer I/O error on device loop0, logical block 65 Buffer I/O error on device loop0, logical block 66 Buffer I/O error on device loop0, logical block 67 Buffer I/O error on device loop0, logical block 68 Buffer I/O error on device loop0, logical block 69 Buffer I/O error on device loop0, logical block 70 Buffer I/O error on device loop0, logical block 71 Buffer I/O error on device loop0, logical block 72 Buffer I/O error on device loop0, logical block 73 Buffer I/O error on device loop0, logical block 74 ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4781! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5310 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4781 Code: e8 e6 0f a2 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 a2 c7 30 ff 90 0f 0b e8 9a c7 30 ff 90 0f 0b e8 92 c7 30 ff 90 <0f> 0b e8 8a c7 30 ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80 RSP: 0018:ffffc9000e11e920 EFLAGS: 00010287 RAX: ffffffff82966d2e RBX: 00000000fffffffc RCX: 0000000000100000 RDX: ffffc9000ebb2000 RSI: 0000000000009a21 RDI: 0000000000009a22 RBP: 1ffff1100879e6ef R08: ffff888043cf7d2b R09: 1ffff1100879efa5 R10: dffffc0000000000 R11: ffffed100879efa6 R12: 0000000000000000 R13: 0000000000000034 R14: 1ffff1100879efa8 R15: ffff888043cf7d40 FS: 00007f9f0a2f16c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000f000 CR3: 000000004369e000 CR4: 0000000000352ef0 Call Trace: ext4_mb_use_preallocated+0x638/0x13e0 fs/ext4/mballoc.c:4998 ext4_mb_new_blocks+0x5a0/0x4530 fs/ext4/mballoc.c:6302 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xe96/0x22a0 fs/ext4/indirect.c:635 ext4_map_create_blocks+0xbb/0x530 fs/ext4/inode.c:632 ext4_map_blocks+0x791/0x12c0 fs/ext4/inode.c:823 mpage_map_one_extent fs/ext4/inode.c:2379 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2469 [inline] ext4_do_writepages+0x1901/0x4770 fs/ext4/inode.c:2938 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3032 do_writepages+0x338/0x560 mm/page-writeback.c:2560 filemap_writeback mm/filemap.c:387 [inline] filemap_fdatawrite_range mm/filemap.c:412 [inline] file_write_and_wait_range+0x36e/0x440 mm/filemap.c:786 ext4_sync_file+0x252/0xa40 fs/ext4/fsync.c:145 generic_write_sync include/linux/fs.h:2687 [inline] ext4_buffered_write_iter+0x2d0/0x380 fs/ext4/file.c:360 ext4_file_write_iter+0xae4/0x1cd0 fs/ext4/file.c:-1 do_iter_readv_writev+0x612/0x8c0 fs/read_write.c:-1 vfs_writev+0x343/0x990 fs/read_write.c:1058 do_pwritev fs/read_write.c:1154 [inline] __do_sys_pwritev2 fs/read_write.c:1212 [inline] __se_sys_pwritev2+0x177/0x2a0 fs/read_write.c:1203 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9f0939e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9f0a2f0fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f9f09625fa0 RCX: 00007f9f0939e0d9 RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 000000000000000a RBP: 00007f9f09435024 R08: 0000000000000000 R09: 0000000000000086 R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9f09626038 R14: 00007f9f09625fa0 R15: 00007fffbf2c66d8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4781 Code: e8 e6 0f a2 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 a2 c7 30 ff 90 0f 0b e8 9a c7 30 ff 90 0f 0b e8 92 c7 30 ff 90 <0f> 0b e8 8a c7 30 ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80 RSP: 0018:ffffc9000e11e920 EFLAGS: 00010287 RAX: ffffffff82966d2e RBX: 00000000fffffffc RCX: 0000000000100000 RDX: ffffc9000ebb2000 RSI: 0000000000009a21 RDI: 0000000000009a22 RBP: 1ffff1100879e6ef R08: ffff888043cf7d2b R09: 1ffff1100879efa5 R10: dffffc0000000000 R11: ffffed100879efa6 R12: 0000000000000000 R13: 0000000000000034 R14: 1ffff1100879efa8 R15: ffff888043cf7d40 FS: 00007f9f0a2f16c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000f000 CR3: 000000004369e000 CR4: 0000000000352ef0