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BUG: KASAN: slab-out-of-bounds in ntfs_attr_find+0x9db/0xb10 fs/ntfs/attrib.c:613
Read of size 4 at addr ffff88805c50027f by task syz-executor.2/16400

CPU: 0 PID: 16400 Comm: syz-executor.2 Not tainted 4.19.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443
 ntfs_attr_find+0x9db/0xb10 fs/ntfs/attrib.c:613
 ntfs_attr_lookup+0x1020/0x1f90 fs/ntfs/attrib.c:1203
 ntfs_read_inode_mount+0x6fa/0x2200 fs/ntfs/inode.c:1858
 ntfs_fill_super+0xa16/0x7e10 fs/ntfs/super.c:2871
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x30c fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2799
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4608aa
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f30325eba88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f30325ebb20 RCX: 00000000004608aa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f30325ebae0
RBP: 00007f30325ebae0 R08: 00007f30325ebb20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020086400

Allocated by task 13690:
 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559
 mempool_alloc+0x146/0x350 mm/mempool.c:385
 bio_alloc_bioset+0x389/0x5e0 block/bio.c:489
 bio_alloc include/linux/bio.h:437 [inline]
 mpage_alloc+0x2f/0x260 fs/mpage.c:79
 do_mpage_readpage+0x1236/0x1ca0 fs/mpage.c:306
 mpage_readpages+0x33a/0x630 fs/mpage.c:404
 read_pages.isra.0+0xf6/0x5d0 mm/readahead.c:123
 __do_page_cache_readahead+0x5c6/0x6c0 mm/readahead.c:211
 force_page_cache_readahead+0x1d8/0x310 mm/readahead.c:242
 page_cache_sync_readahead mm/readahead.c:523 [inline]
 page_cache_sync_readahead+0x3af/0x520 mm/readahead.c:510
 generic_file_buffered_read mm/filemap.c:2115 [inline]
 generic_file_read_iter+0x1497/0x2b60 mm/filemap.c:2385
 blkdev_read_iter+0x11b/0x180 fs/block_dev.c:1959
 call_read_iter include/linux/fs.h:1815 [inline]
 new_sync_read fs/read_write.c:406 [inline]
 __vfs_read+0x518/0x750 fs/read_write.c:418
 vfs_read+0x194/0x3c0 fs/read_write.c:452
 ksys_read+0x12b/0x2a0 fs/read_write.c:579
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 15728:
 __cache_free mm/slab.c:3503 [inline]
 kmem_cache_free+0x7f/0x260 mm/slab.c:3765
 mempool_free+0xe3/0x370 mm/mempool.c:494
 bio_free+0xee/0x140 block/bio.c:267
 bio_put+0x55/0x80 block/bio.c:561
 bio_endio+0x471/0x810 block/bio.c:1780
 req_bio_endio block/blk-core.c:278 [inline]
 blk_update_request+0x30f/0xaf0 block/blk-core.c:3111
 blk_mq_end_request+0x4a/0x340 block/blk-mq.c:544
 lo_complete_rq+0x201/0x2d0 drivers/block/loop.c:487
 __blk_mq_complete_request block/blk-mq.c:583 [inline]
 blk_mq_complete_request+0x472/0x660 block/blk-mq.c:620
 loop_handle_cmd drivers/block/loop.c:1931 [inline]
 loop_queue_work+0x274/0x20c0 drivers/block/loop.c:1940
 kthread_worker_fn+0x292/0x730 kernel/kthread.c:675
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

The buggy address belongs to the object at ffff88805c500180
 which belongs to the cache bio-0 of size 216
The buggy address is located 39 bytes to the right of
 216-byte region [ffff88805c500180, ffff88805c500258)
The buggy address belongs to the page:
page:ffffea0001714000 count:1 mapcount:0 mapping:ffff88823b3acb40 index:0xffff88805c500a40
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0001857708 ffffea0002bb8d48 ffff88823b3acb40
raw: ffff88805c500a40 ffff88805c500040 0000000100000008 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88805c500100: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805c500180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805c500200: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
                                                                ^
 ffff88805c500280: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff88805c500300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
NILFS (loop5): couldn't find nilfs on the device