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OpenCloudOS-Kernel/fs/erofs
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Jingbo Xu 00432384ec erofs: fix NULL dereference of dif->bdev_handle in fscache mode 
commit 8bd90b6ae7856dd5000b75691d905b39b9ea5d6b upstream.

Avoid NULL dereference of dif->bdev_handle, as dif->bdev_handle is NULL
in fscache mode.

 BUG: kernel NULL pointer dereference, address: 0000000000000000
 RIP: 0010:erofs_map_dev+0xbd/0x1c0
 Call Trace:
  <TASK>
  erofs_fscache_data_read_slice+0xa7/0x340
  erofs_fscache_data_read+0x11/0x30
  erofs_fscache_readahead+0xd9/0x100
  read_pages+0x47/0x1f0
  page_cache_ra_order+0x1e5/0x270
  filemap_get_pages+0xf2/0x5f0
  filemap_read+0xb8/0x2e0
  vfs_read+0x18d/0x2b0
  ksys_read+0x53/0xd0
  do_syscall_64+0x42/0xf0
  entry_SYSCALL_64_after_hwframe+0x6e/0x76

Reported-by: Yiqun Leng <yqleng@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=7245
Fixes: 49845720080d ("erofs: Convert to use bdev_open_by_path()")
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20231114070704.23398-1-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2024-07-05 09:34:05 +02:00
..
Kconfig erofs: boost negative xattr lookup with bloom filter 2023-08-11 12:11:44 +08:00
Makefile erofs: DEFLATE compression support 2023-08-11 12:11:17 +08:00
compress.h erofs: simplify compression configuration parser 2024-01-25 15:35:57 -08:00
data.c erofs: fix NULL dereference of dif->bdev_handle in fscache mode 2024-07-05 09:34:05 +02:00
decompressor.c erofs: fix lz4 inplace decompression 2024-01-31 16:18:49 -08:00
decompressor_deflate.c erofs: avoid allocating DEFLATE streams before mounting 2024-06-16 13:47:31 +02:00
decompressor_lzma.c erofs: simplify compression configuration parser 2024-01-25 15:35:57 -08:00
dir.c erofs: keep meta inode into erofs_buf 2023-04-17 01:15:50 +08:00
erofs_fs.h erofs: update on-disk format for xattr name filter 2023-08-11 12:11:44 +08:00
fscache.c erofs: fix lockdep false positives on initializing erofs_pseudo_mnt 2024-03-26 18:19:40 -04:00
inode.c v6.6-vfs.ctime 2023-08-28 09:31:32 -07:00
internal.h erofs: get rid of erofs_fs_context 2024-05-25 16:22:53 +02:00
namei.c erofs: fix refcount on the metabuf used for inode lookup 2024-03-01 13:35:01 +01:00
pcpubuf.c erofs: mark z_erofs_lzma_init/erofs_pcpubuf_init w/ __init 2023-03-09 22:49:30 +08:00
super.c erofs: reliably distinguish block based and fscache mode 2024-05-25 16:22:53 +02:00
sysfs.c erofs: make kobj_type structures constant 2023-02-15 08:11:26 +08:00
utils.c erofs: fix erofs_insert_workgroup() lockref usage 2023-11-20 11:59:23 +01:00
xattr.c erofs: boost negative xattr lookup with bloom filter 2023-08-11 12:11:44 +08:00
xattr.h Changes since last update: 2023-04-24 14:25:39 -07:00
zdata.c erofs: fix ztailpacking for subpage compressed blocks 2024-02-05 20:14:16 +00:00
zmap.c erofs: fix up compacted indexes for block size < 4096 2024-02-05 20:14:16 +00:00