loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 512 to 64 EXT4-fs error (device loop0): xattr_find_entry:333: inode #15: comm syz.0.0: corrupted xattr entries EXT4-fs error (device loop0): xattr_find_entry:333: inode #15: comm syz.0.0: corrupted xattr entries syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=72, nr_sectors = 2 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:364: I/O error 10 writing to inode 15 starting block 36) Buffer I/O error on device loop0, logical block 36 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=54, nr_sectors = 16 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:364: I/O error 10 writing to inode 15 starting block 27) Buffer I/O error on device loop0, logical block 27 Buffer I/O error on device loop0, logical block 28 Buffer I/O error on device loop0, logical block 29 Buffer I/O error on device loop0, logical block 30 Buffer I/O error on device loop0, logical block 31 Buffer I/O error on device loop0, logical block 32 Buffer I/O error on device loop0, logical block 33 Buffer I/O error on device loop0, logical block 34 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=152, nr_sectors = 2 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:364: I/O error 10 writing to inode 15 starting block 76) Buffer I/O error on device loop0, logical block 76 EXT4-fs error (device loop0): ext4_do_update_inode:5801: inode #15: comm syz.0.0: corrupted inode contents EXT4-fs error (device loop0): ext4_dirty_inode:6736: inode #15: comm syz.0.0: mark_inode_dirty error ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4781! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5324 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 76 c1 a1 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 f2 1f 30 ff 90 0f 0b e8 ea 1f 30 ff 90 0f 0b e8 e2 1f 30 ff 90 <0f> 0b e8 da 1f 30 ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80 RSP: 0018:ffffc9000e206840 EFLAGS: 00010283 RAX: ffffffff8297ffbe RBX: 00000000fffffffb RCX: 0000000000100000 RDX: ffffc9000ea1a000 RSI: 000000000000906a RDI: 000000000000906b RBP: 1ffff11008837a98 R08: ffff8880441c1c43 R09: 1ffff11008838388 R10: dffffc0000000000 R11: ffffed1008838389 R12: 0000000000000000 R13: 0000000000000022 R14: 1ffff1100883838b R15: ffff8880441c1c58 FS: 00007f519827b6c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f78b0a53000 CR3: 0000000042dc8000 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:2686 [inline] ext4_buffered_write_iter+0x2d0/0x380 fs/ext4/file.c:360 ext4_file_write_iter+0xae4/0x1cd0 fs/ext4/file.c:-1 aio_write+0x5d0/0x870 fs/aio.c:1687 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x798/0x13d0 fs/aio.c:2106 __do_sys_io_submit fs/aio.c:2165 [inline] __se_sys_io_submit+0x195/0x340 fs/aio.c:2135 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: 0033:0x7f519739e159 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:00007f519827afe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f5197625fa0 RCX: 00007f519739e159 RDX: 00002000000002c0 RSI: 0000000000000001 RDI: 00007f5198239000 RBP: 00007f519743506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5197626038 R14: 00007f5197625fa0 R15: 00007ffdd18f0708 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x6bf/0x720 fs/ext4/mballoc.c:4781 Code: e8 76 c1 a1 ff 48 ba 00 00 00 00 00 fc ff df e9 d7 fa ff ff e8 f2 1f 30 ff 90 0f 0b e8 ea 1f 30 ff 90 0f 0b e8 e2 1f 30 ff 90 <0f> 0b e8 da 1f 30 ff 90 0f 0b 48 8b 0c 24 48 83 c1 54 80 e1 07 80 RSP: 0018:ffffc9000e206840 EFLAGS: 00010283 RAX: ffffffff8297ffbe RBX: 00000000fffffffb RCX: 0000000000100000 RDX: ffffc9000ea1a000 RSI: 000000000000906a RDI: 000000000000906b RBP: 1ffff11008837a98 R08: ffff8880441c1c43 R09: 1ffff11008838388 R10: dffffc0000000000 R11: ffffed1008838389 R12: 0000000000000000 R13: 0000000000000022 R14: 1ffff1100883838b R15: ffff8880441c1c58 FS: 00007f519827b6c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f78b0a53000 CR3: 0000000042dc8000 CR4: 0000000000352ef0