EXT4-fs error (device loop0) in ext4_reserve_inode_write:6313: Out of memory EXT4-fs error (device loop0): ext4_dirty_inode:6517: inode #18: comm syz.0.0: mark_inode_dirty error EXT4-fs error (device loop0) in ext4_reserve_inode_write:6313: Out of memory EXT4-fs error (device loop0): ext4_write_end:1472: inode #18: comm syz.0.0: mark_inode_dirty error EXT4-fs error (device loop0) in ext4_reserve_inode_write:6313: Out of memory EXT4-fs error (device loop0): ext4_splice_branch:479: inode #18: comm syz.0.0: mark_inode_dirty error EXT4-fs error (device loop0) in ext4_reserve_inode_write:6313: Out of memory EXT4-fs error (device loop0): ext4_dirty_inode:6517: inode #18: comm syz.0.0: mark_inode_dirty error EXT4-fs error (device loop0) in ext4_reserve_inode_write:6313: Out of memory syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=146, nr_sectors = 24 limit=64 EXT4-fs warning (device loop0): ext4_end_bio:372: I/O error 10 writing to inode 18 starting block 73) Buffer I/O error on device loop0, logical block 73 Buffer I/O error on device loop0, logical block 74 Buffer I/O error on device loop0, logical block 75 Buffer I/O error on device loop0, logical block 76 Buffer I/O error on device loop0, logical block 77 Buffer I/O error on device loop0, logical block 78 Buffer I/O error on device loop0, logical block 79 Buffer I/O error on device loop0, logical block 80 Buffer I/O error on device loop0, logical block 81 Buffer I/O error on device loop0, logical block 82 ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4765! 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~bpo12+1 04/01/2014 RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4765 Code: e8 b4 eb a9 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 00 ad 42 ff 90 0f 0b e8 f8 ac 42 ff 90 0f 0b e8 f0 ac 42 ff 90 <0f> 0b e8 e8 ac 42 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000f5de7e8 EFLAGS: 00010287 RAX: ffffffff827d66a0 RBX: 00000000ffffffd4 RCX: 0000000000100000 RDX: ffffc9000e593000 RSI: 0000000000014b4c RDI: 0000000000014b4d RBP: 1ffff11006414e98 R08: ffff8880320a8503 R09: 1ffff110064150a0 R10: dffffc0000000000 R11: ffffed10064150a1 R12: 0000000000000000 R13: 0000000000000030 R14: 1ffff110064150a3 R15: ffff8880320a8518 FS: 00007fcee4c4a6c0(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f50ffc802b0 CR3: 0000000011963000 CR4: 0000000000352ef0 Call Trace: ext4_mb_use_preallocated+0x660/0x13f0 fs/ext4/mballoc.c:4982 ext4_mb_new_blocks+0x5b4/0x4720 fs/ext4/mballoc.c:6286 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xe42/0x21c0 fs/ext4/indirect.c:635 ext4_map_create_blocks fs/ext4/inode.c:611 [inline] ext4_map_blocks+0x7fe/0x1740 fs/ext4/inode.c:811 mpage_map_one_extent fs/ext4/inode.c:2374 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2468 [inline] ext4_do_writepages+0x16a1/0x4610 fs/ext4/inode.c:2931 ext4_writepages+0x205/0x350 fs/ext4/inode.c:3025 do_writepages+0x32e/0x550 mm/page-writeback.c:2604 filemap_fdatawrite_wbc mm/filemap.c:389 [inline] __filemap_fdatawrite_range mm/filemap.c:422 [inline] file_write_and_wait_range+0x23e/0x340 mm/filemap.c:797 generic_buffers_fsync_noflush+0x6c/0x180 fs/buffer.c:609 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x332/0xb20 fs/ext4/fsync.c:147 generic_write_sync include/linux/fs.h:3046 [inline] ext4_buffered_write_iter+0x2ca/0x3a0 fs/ext4/file.c:305 ext4_file_write_iter+0x298/0x1bc0 fs/ext4/file.c:-1 aio_write+0x535/0x7a0 fs/aio.c:1634 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x78b/0x1310 fs/aio.c:2053 __do_sys_io_submit fs/aio.c:2112 [inline] __se_sys_io_submit+0x185/0x2f0 fs/aio.c:2082 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcee3d8efc9 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:00007fcee4c4a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007fcee3fe6090 RCX: 00007fcee3d8efc9 RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007fcee4c21000 RBP: 00007fcee3e11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcee3fe6128 R14: 00007fcee3fe6090 R15: 00007fff4173ee48 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_mb_use_inode_pa+0x6c1/0x720 fs/ext4/mballoc.c:4765 Code: e8 b4 eb a9 ff 48 ba 00 00 00 00 00 fc ff df e9 da fa ff ff e8 00 ad 42 ff 90 0f 0b e8 f8 ac 42 ff 90 0f 0b e8 f0 ac 42 ff 90 <0f> 0b e8 e8 ac 42 ff 90 0f 0b 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc9000f5de7e8 EFLAGS: 00010287 RAX: ffffffff827d66a0 RBX: 00000000ffffffd4 RCX: 0000000000100000 RDX: ffffc9000e593000 RSI: 0000000000014b4c RDI: 0000000000014b4d RBP: 1ffff11006414e98 R08: ffff8880320a8503 R09: 1ffff110064150a0 R10: dffffc0000000000 R11: ffffed10064150a1 R12: 0000000000000000 R13: 0000000000000030 R14: 1ffff110064150a3 R15: ffff8880320a8518 FS: 00007fcee4c4a6c0(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f50ffc802b0 CR3: 0000000011963000 CR4: 0000000000352ef0