linux.git/fs/udf, branch v5.11

udf: fix the problem that the disc content is not displayed

2021-01-18T11:06:33+00:00

When the capacity of the disc is too large (assuming the 4.7G
specification), the disc (UDF file system) will be burned
multiple times in the windows (Multisession Usage). When the
remaining capacity of the CD is less than 300M (estimated
value, for reference only), open the CD in the Linux system,
the content of the CD is displayed as blank (the kernel will
say "No VRS found"). Windows can display the contents of the
CD normally.
Through analysis, in the "fs/udf/super.c": udf_check_vsd
function, the actual value of VSD_MAX_SECTOR_OFFSET may
be much larger than 0x800000. According to the current code
logic, it is found that the type of sbi->s_session is "__s32",
 when the remaining capacity of the disc is less than 300M
(take a set of test values: sector=3154903040,
sbi->s_session=1540464, sb->s_blocksize_bits=11 ), the
calculation result of "sbi->s_session << sb->s_blocksize_bits"
 will overflow. Therefore, it is necessary to convert the
type of s_session to "loff_t" (when udf_check_vsd starts,
assign a value to _sector, which is also converted in this
way), so that the result will not overflow, and then the
content of the disc can be displayed normally.

Link: https://lore.kernel.org/r/20210114075741.30448-1-changlianzhi@uniontech.com
Signed-off-by: lianzhi chang 
Signed-off-by: Jan Kara

Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2020-10-24T19:26:05+00:00

Pull misc vfs updates from Al Viro:
 "Assorted stuff all over the place (the largest group here is
  Christoph's stat cleanups)"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: remove KSTAT_QUERY_FLAGS
  fs: remove vfs_stat_set_lookup_flags
  fs: move vfs_fstatat out of line
  fs: implement vfs_stat and vfs_lstat in terms of vfs_fstatat
  fs: remove vfs_statx_fd
  fs: omfs: use kmemdup() rather than kmalloc+memcpy
  [PATCH] reduce boilerplate in fsid handling
  fs: Remove duplicated flag O_NDELAY occurring twice in VALID_OPEN_FLAGS
  selftests: mount: add nosymfollow tests
  Add a "nosymfollow" mount option.

udf: Limit sparing table size

2020-09-29T15:21:54+00:00

Although UDF standard allows it, we don't support sparing table larger
than a single block. Check it during mount so that we don't try to
access memory beyond end of buffer.

Reported-by: syzbot+9991561e714f597095da@syzkaller.appspotmail.com
Signed-off-by: Jan Kara

udf: Remove pointless union in udf_inode_info

2020-09-29T15:21:54+00:00

We use only a single member out of the i_ext union in udf_inode_info.
Just remove the pointless union.

Signed-off-by: Jan Kara

udf: Avoid accessing uninitialized data on failed inode read

2020-09-29T15:21:46+00:00

When we fail to read inode, some data accessed in udf_evict_inode() may
be uninitialized. Move the accesses to !is_bad_inode() branch.

Reported-by: syzbot+91f02b28f9bb5f5f1341@syzkaller.appspotmail.com
Signed-off-by: Jan Kara

udf: Fix memory leak when mounting

2020-09-22T10:20:14+00:00

udf_process_sequence() allocates temporary array for processing
partition descriptors on volume which it fails to free. Free the array
when it is not needed anymore.

Fixes: 7b78fd02fb19 ("udf: Fix handling of Partition Descriptors")
CC: stable@vger.kernel.org
Reported-by: syzbot+128f4dd6e796c98b3760@syzkaller.appspotmail.com
Signed-off-by: Jan Kara

udf: Remove redundant initialization of variable ret

2020-09-22T09:22:04+00:00

After commit 9293fcfbc181 ("udf: Remove struct ustr as non-needed
intermediate storage"), the variable ret is being initialized with
'-ENOMEM' that is meaningless. So remove it.

Link: https://lore.kernel.org/r/20200922081322.70535-1-jingxiangfeng@huawei.com
Signed-off-by: Jing Xiangfeng 
Signed-off-by: Jan Kara

[PATCH] reduce boilerplate in fsid handling

2020-09-18T20:45:50+00:00

Get rid of boilerplate in most of ->statfs()
instances...

Signed-off-by: Al Viro

udf: Use kvzalloc() in udf_sb_alloc_bitmap()

2020-08-28T10:28:58+00:00

Use kvzalloc() in udf_sb_alloc_bitmap() instead of open-coding it.
Size computation wrapped in struct_size() macro to prevent potential
integer overflows.

Link: https://lore.kernel.org/r/20200827221652.64660-1-efremov@linux.com
Signed-off-by: Denis Efremov 
Reviewed-by: Gustavo A. R. Silva 
Signed-off-by: Jan Kara

treewide: Use fallthrough pseudo-keyword

2020-08-23T22:36:59+00:00

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva