Commit Graph

773 Commits

Author SHA1 Message Date
Matthias Brugger
8921ac9747 fs: btrfs: Select SHA256 in Kconfig
Since commit 565a4147d1 ("fs: btrfs: Add more checksum algorithms")
btrfs uses the sha256 checksum algorithm. But Kconfig lacks to select
it. This leads to compilation errors:
fs/built-in.o: In function `hash_sha256':
fs/btrfs/crypto/hash.c:25: undefined reference to `sha256_starts'
fs/btrfs/crypto/hash.c:26: undefined reference to `sha256_update'
fs/btrfs/crypto/hash.c:27: undefined reference to `sha256_finish'

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
2021-01-29 10:36:49 -05:00
Heinrich Schuchardt
84ca3055f0 fs: fat: remove superfluous assignments
Do not assign a value to a variable if it is not used.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-29 10:36:48 -05:00
Heinrich Schuchardt
41ac28c672 fs: fat: avoid out of bounds access warning
When copying short name plus extension refer to the encapsulating structure
and not to the short name element.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-29 10:36:48 -05:00
Heinrich Schuchardt
041f0af366 fs: fat: structure for name and extension
The short name and extension of FAT files are stored in adjacent fields of
the directory entry. For some operations like calculating a checksum or
copying both fields it is preferable to treat both as one structure.

Change the definition of the directory entry structure to include a
structure comprising the name and the extension field.

This resolves Coverity CID 316357, CID 316350, CID 316348.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-23 07:56:53 +01:00
Heinrich Schuchardt
e97eb638de fs: fat: consistent error handling for flush_dir()
Provide function description for flush_dir().
Move all error messages for flush_dir() from the callers to the function.
Move mapping of errors to -EIO to the function.
Always check return value of flush_dir() (Coverity CID 316362).

In fat_unlink() return -EIO if flush_dirty_fat_buffer() fails.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-23 07:56:53 +01:00
Heinrich Schuchardt
81f562719e ubifs: do not decide upon uninitialized variable
Before 'if (err)' we have to initialize the variable otherwise we use a
random value from the stack.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-20 14:01:45 -05:00
Heinrich Schuchardt
3b00a6bafc fs: btrfs: simplify close_ctree_fs_info()
At the beginning of close_ctree_fs_info() the value 0 is assigned to err
and never changed before testing it.

Let's get rid of the superfluous variable.

Fixes: f06bfcf54d ("fs: btrfs: Crossport open_ctree_fs_info() from btrfs-progs")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Qu Wenruo <wqu@suse.com>
2021-01-20 14:01:45 -05:00
Campbell Suter
9dba07f143 Fix squashfs failing to load sparse files
SquashFS supports sprase blocks in files - that is, if a given block is
composed only of zeros, it's not written to the output file to save
space and it's on-disk length field is set to zero to indicate that.

Previously the squashfs driver did not recognise that, and would attempt
to read and decompress a zero-sized block, which obviously failed.

The following command may be used to create a file for testing:

cat <(dd if=/dev/urandom of=/dev/stdout bs=1M count=1) \
	<(dd if=/dev/zero of=/dev/stdout bs=1M count=1) \
	<(dd if=/dev/urandom of=/dev/stdout bs=1k count=200) >test_file

Signed-off-by: Campbell Suter <campbell@snapit.group>
2021-01-20 14:01:44 -05:00
Qu Wenruo
3b72612ad1 fs: btrfs: volumes: prevent overflow for multiplying
In __btrfs_map_block() we do a int * int and assign it to u64.
This is not safe as the result (int * int) is still evaluated as (int)
thus it can overflow.

Convert one of the multiplier to u64 to prevent such problem.

In real world, this should not cause problem as we have device number
limit thus it won't go beyond 4G for a single stripe.

But it's harder to teach coverity about all these hidden limits, so just
fix the possible overflow.

Reported-by: Coverity CID 312957
Reported-by: Coverity CID 312948
Signed-off-by: Qu Wenruo <wqu@suse.com>
2021-01-20 14:01:08 -05:00
Heinrich Schuchardt
5f59518a7b efi_loader: setting boot device
Up to now the bootefi command used the last file loaded to determine the
boot partition. This has led to errors when the fdt had been loaded from
another partition after the EFI binary.

Before setting the boot device from a loaded file check if it is a PE-COFF
image or a FIT image.

For a PE-COFF image remember address and size, boot device and path.

For a FIT image remember boot device and path.

If the PE-COFF image is overwritten by loading another file, forget it.

Do not allow to start an image via bootefi which is not the last loaded
PE-COFF image.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-13 02:38:00 +01:00
Tom Rini
720620e691 Prepare v2021.01-rc5
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Merge tag 'v2021.01-rc5' into next

Prepare v2021.01-rc5

Signed-off-by: Tom Rini <trini@konsulko.com>
2021-01-05 16:20:26 -05:00
Heinrich Schuchardt
c0029e4e25 fs/fat: implement fsuuid command
The FAT file system does not have a UUID but a 4 byte volume ID.
Let the fsuuid command show it in XXXX-XXXX format.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-31 14:32:27 +01:00
Heinrich Schuchardt
d0be67657d fs: fat: eliminate DIRENTSPERBLOCK() macro
The FAT filesystem implementation uses several marcros referring to a magic
variable name mydata which renders the code less readable. Eliminate one of
them which is only used for a debug() statement.

Use log_debug() instead of debug().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-12-31 14:32:02 +01:00
Heinrich Schuchardt
3d20d212cf fs: fat: deletion of long file names
Long file names are stored in multiple directory entries. When deleting a
file we must delete all of them.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:15:00 +01:00
Heinrich Schuchardt
89735b44c4 fs: fat: first dentry of long name in FAT iterator
A long name is split over multiple directory entries. When deleting a file
with a long name we need the first directory entry to be able to delete the
whole chain.

Add the necessary fields to the FAT iterator:

* cluster of first directory entry
* address of first directory entry
* remaining entries in cluster

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:15:00 +01:00
Heinrich Schuchardt
4a593dd0c5 fs: fat: use constant DELETED_FLAG
When deleting a directory entry 0xe5 is written to name[0].

We have a constant for this value and should use it consistently.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
1e51c8d64a fs: fat: search file should not allocate cluster
Searching for a file is not a write operation. So it should not lead to the
allocation of a new cluster to the directory.

If we reuse deleted entries, we might not even use the new cluster and due
to not flushing it the directory could be corrupted.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
3049a5106c fs: fat: reuse deleted directory entries
When creating new directory entries try to reuse entries marked as deleted.

In fill_dir_slot() do not allocate new clusters as this has already been
done in fat_find_empty_dentries().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
32a5f887c4 fs: fat: fat_find_empty_dentries()
Provide a function to find a series of empty directory entries.

The current directory is scanned for deleted entries.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
569b0e1938 fs: fat: flush new directory cluster
When handling long file names directory entries may be split over multiple
clusters. We must make sure that new clusters are zero filled on disk.

When allocating a new cluster for a directory flush it.

The flushing should be executed before updating the FAT. This way if
flushing fails, we still have a valid directory structure.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
7557c84855 fs: fat: set start cluster for root directory
When iterating over a child directory we set itr->start_clust.
Do the same when over the root directory.

When looking for deleted directory entries or existing short names we will
have to iterate over directories a second and third time. With this patch
we do not need any special logic for the root directory.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
27ed690382 fs: fat: dentry iterator for fill_dir_slot()
For reusing deleted directory entries we have to adjust the function called
to step to the next directory entry.

This patch alone is not enough to actually reuse deleted directory entries
as the fill_dir_slot() is still called with first never used directory
entry.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
3a331aee56 fs: fat: generate unique short names
File names must be unique within their directory. So before assigning a
short name we must check that it is unique.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
57b745e238 fs: fat: call set_name() only once
In set_name() we select the short name. Once this is correctly implemented
this will be a performance intensive operation because we need to check
that the name does not exist yet. So set_name should only be called once.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
a343249bef fs: fat: pass shortname to fill_dir_slot
Currently we pass the short name via the directory iterator.
Pass it explicitly as a parameter.

This removes the requirement to set the short name in the iterator before
writing the long name.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:59 +01:00
Heinrich Schuchardt
28cef9ca2e fs: fat: create correct short names
The current function set_name() used to create short names has the
following deficiencies resolved by this patch:

* Long names (e.g. FOO.TXT) are stored even if a short name is enough.
* Short names with spaces are created, e.g. "A     ~1.TXT".
* Short names with illegal characters are created, e.g. "FOO++BAR".
* Debug output does not not consider that the short file name has no
  concluding '\0'.

The solution for the following bug is split of into a separate patch:

* Short file names must be unique.

This patch only provides the loop over possible short file names.

Fixes: c30a15e590 ("FAT: Add FAT write feature")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:58 +01:00
Heinrich Schuchardt
d236e825a2 fs: fat: export fat_next_cluster()
Rename function next_cluster() to fat_next_cluster() and export it.

When creating a new directory entries we should reuse deleted entries.
This requires re-scanning the directory.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-12-10 09:14:58 +01:00
Heinrich Schuchardt
c5924118c0 fs: fat: correct first cluster for '..'
The FAT specification [1] requires that for a '..' directory entry pointing
to the root directory the fields DIR_FstClusHi and DIR_FstClusLo are 0.

[1] Microsoft FAT Specification, Microsoft Corporation, August 30 2005

Fixes: 31a18d570d ("fs: fat: support mkdir")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
2020-12-10 09:14:58 +01:00
Richard Genoud
7e932ac790 fs/squashfs: sqfs_close/sqfs_read_sblk: set ctxt.sblk to NULL after free
This will prevent a double free error if sqfs_close() is called twice.

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-12-02 16:21:58 -05:00
Heinrich Schuchardt
1ec29aa306 fs: fat: use ATTR_ARCH instead of anonymous 0x20
Using constants instead of anonymous numbers increases code readability.

Fixes: 704df6aa0a ("fs: fat: refactor write interface for a file offset")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-11-29 05:18:16 +01:00
Heinrich Schuchardt
a2c5a92d48 fs: fat: directory entries starting with 0x05
0x05 is used as replacement letter for 0xe5 at the first position of short
file names. We must not skip over directory entries starting with 0x05.

Cf. Microsoft FAT Specification, August 30 2005

Fixes: 39606d462c ("fs: fat: handle deleted directory entries correctly")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-11-29 05:18:16 +01:00
Heinrich Schuchardt
661d223868 fs: fat: avoid NULL dereference when root dir is full
When trying to create a file in the full root directory of a FAT32
filesystem a NULL dereference can be observed.

When the root directory of a FAT16 filesystem is full fill_dir_slot() must
return -1 to signal that a new directory entry could not be allocated.

Fixes: cd2d727fff ("fs: fat: allocate a new cluster for root directory of fat32")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-11-29 05:18:16 +01:00
Richard Genoud
dd4866b437 fs/squashfs: implement exists() function
This permits to find a file and use the distro_bootcmd

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
21b1b3bad5 fs/squashfs: sqfs_read: remove buggy offset functionality
offset is the offset in the file read, not the offset in the destination
buffer.
If the offset is not null, this will lead to a memory corruption.
So, for now, we are returning an error if the offset is used.

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
cbd5e40ede fs/squashfs: sqfs_read: don't write beyond buffer size
The length of the buffer wasn't taken into account when writing to the
given buffer.

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
6d25bd3e9c fs/squashfs: sqfs_probe: use sqfs_decompressor_init() return value
sqfs_decompressor_init() returns a value, so it's better to use it than
to force the return value to EINVAL (it could be ENOMEM)

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
56cf1ceee3 fs/squashfs: sqfs_probe: reset cur_dev/cur_part_info to NULL on error
Resetting the context on error will prevent some checks like:
if (!ctx.cur_dev)
To pass when the probe method has failed

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
ccd4c08a45 fs/squashfs: sqfs_probe: fix possible memory leak on error
If SquashFS magic number is invalid, there's a memory leak.

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
571b67ee1d fs/squashfs: sqfs_read: fix memory leak on finfo.blk_sizes
finfo.blk_sizes may not be freed in case of error in the for loop
Setting it to null and freeing it at the end makes prevents that from
happening.

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
33686804d2 fs/squashfs: sqfs_get_abs_path: fix possible memory leak on error
if  sqfs_tokenize(rel_tokens, rc, rel); fails, the function exits
without freeing the array base_tokens.

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
53db0e24a8 fs/squashfs: sqfs_get_abs_path: fix error check
the return value of sqfs_tokenize(rel_tokens, rc, rel); wasn't checked.
(but "ret" value was !)
This is obviouly a typo.

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
c9b8e86f8b fs/squashfs: sqfs_frag_lookup: simplify error handling
For consistency with other functions.

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
555459e793 fs/squashfs: sqfs_read: fix another memory leak
data_buffer was allocated in a loop and freed only once.

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
7ce9745cbe fs/squashfs: sqfs_read: fix memory leak
sqfs_closedir() should be called to free memory allocated by
sqfs_opendir()

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
b34949fe9b fs/squashfs: sqfs_read: remove useless sqfs_closedir()
as sqfs_opendir failed, there's no need to call sqfs_closedir

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
d1d8d75f69 fs/squashfs: sqfs_read: fix dangling pointer dirs->entry
dirs->entry shouldn't be left dangling as it could be freed twice.

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
35475f83a1 fs/squashfs: sqfs_size: remove useless sqfs_closedir()
as sqfs_opendir failed, there's no need to call sqfs_closedir

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
508a9dc7f6 fs/squashfs: sqfs_size: fix dangling pointer dirs->entry
dirs->entry shouldn't be left dangling as it could be freed twice.

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
dc3312c43c fs/squashfs: sqfs_concat_tokens: check if malloc succeeds
memory allocation should always be checked

Reviewed-by: Joao Marcos Costa <jmcosta944@gmail.com>
Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00
Richard Genoud
4c83d27557 fs/squashfs: sqfs_read_inode_table: fix dangling pointer
inode_table should not be left dangling as it may be freed in sqfs_opendir

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
2020-11-19 09:45:49 -05:00