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Report of the static analyzer:
The value of an arithmetic expression 'eb_cnt * mtd.eb_size' is a subject to overflow because its operands are not cast to a larger data type before performing arithmetic
Corrections explained:
Added explicit casting of eb_cnt to long long in the condition
if (eb_start == 0 && mtd.size == eb_cnt * mtd.eb_size)
to ensure the multiplication is performed in a 64-bit context,
preventing potential overflow for large values of eb_cnt and mtd.eb_size.
This ensures correct handling of devices with large block counts or block sizes.
Triggers found by static analyzer Svace.
Signed-off-by: Anton Moryakov <ant.v.moryakov@gmail.com>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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fectest.c formats a struct timeval with the assumption that time_t and
suseconds_t are aliases for long, but some 32-bit systems now define
them as long long in order to support timestamps beyond 2038.
As this is an elapsed time and not a timestamp, both fields should be
within the range of long, so cast them to long before formatting
rather than moving to long long.
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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JFFS2 supports buffer mode for ECC'd NOR Flash that cleanmarker size
is rounded up to mtd->writesize, while the '-j' option in flash_erase
utility uses fixed 12 bytes. That makes flash program ops unaligned to
mtd->writesize and causes program error or disables ECC.
The mkfs.jffs2 utility supports '-c' option that allows users to specify
cleanmarker size. This patch implements '-c' option in the flash_erase
that can be used along with '-j' option.
Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This option is useful for power fail resilient bootloader updates, for
systems that check only the partition header for validity before
attempting to load the bootloader. For example zynq.
Postponing the write of a specified amount of bytes at the beginning of
a bootloader makes sure a written bootloader slot is not considered
valid until all the data is written.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This introduces a new feature to the MTD command line utilities that
allows MTD devices to be referenced by name instead of device node. For
example this looks like:
> # Display info for the MTD device with name "data"
> mtdinfo mtd:data
> # Copy file to MTD device with name "data"
> flashcp /my/file mtd:data
This follows the syntax supported by the kernel which allows MTD
device's to be mounted by name[1].
Add the function mtd_find_dev_node() that accepts an MTD "identifier"
and returns the MTD's device node. The function accepts a string
starting with "mtd:" which it treats as the MTD's name. It then attempts
to search for the MTD, and if found maps it back to the /dev/mtdX device
node. If the string does not start with "mtd:", then assume it's the old
style and refers directly to a MTD device node.
The function is then hooked into existing tools like flashcp, mtdinfo,
flash_unlock, etc. To load in the new MTD parsing code in a consistent
way across programs.
[1] http://www.linux-mtd.infradead.org/faq/jffs2.html#L_mtdblock
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add correct casting for written to prevent overflow that size_t is
only 32 bits on a 32-bit platform.
Signed-off-by: cchoux <chou.cosmo@gmail.com>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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If the partition size passed in to the BLKPG_ADD_PARTITION ioctl is 0,
Linux will make the partition fill to the end of the device[1]. Document
this feature in the help.
[1] https://elixir.bootlin.com/linux/v6.0.6/source/drivers/mtd/mtdpart.c#L254
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The --partition mode is not verifying that data is being written
successfully.
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The DIFF_BLOCKS code requires that src and dest buffers be large enough
to hold one MTD erasesize. This is because each loop operates on one
eraseblock so that it can erase and write one whole sector. But the src
and dest buffers are fixed at BUFSIZE, so on platforms where the MTD
erasesize are larger then BUFSIZE it will overflow the buffers.
Instead allocate the buffers dynamically so that they can be sized to
fit the erasesize.
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Most of the uses of log_printf fall into two styles
> if (flags & FLAG_VERBOSE)
> log_printf(LOG_NORMAL, ...);
or
> log_printf(LOG_ERROR, ...)
> exit(EXIT_FAILURE);
Replace them with log_verbose and log_failure respectively.
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add a safe_lseek wrapper to check for lseek errors.
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Share the writing code between the two write implementations.
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Commit 0a5e2fa5c1e4 ("mtd-utils: add optional offset parameter to
flash_otp_dump") introduced an offset parameter. This should have
been optional, but there was a typo. Fix it.
Reported-by: Sergei Antonov <saproj@gmail.com>
Fixes: 0a5e2fa5c1e4 ("mtd-utils: add optional offset parameter to flash_otp_dump")
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Sergei Antonov <saproj@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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misc-utils/fectest.c:37:11: warning: iteration 47 invokes undefined behavior [-Waggressive-loop-optimizations]
37 | srcs[i] = buf + (i * PKT_SIZE);
| ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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- The original flashcp process is erase, write and verify all blocks
in one time from file to device.
This patch will add a function that only copy different block data
from file to device. The function will compare blocks by block
between file and device, then erase and write block data from file
to device if found different block.
Signed-off-by: Harvey Wu <harveywu95@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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On some SPI NOR flashes you can actually erase the OTP region until its
fully locked. Add a small utility for that.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Some flash types support full erase chip command which can reduce the
flash erase time. Try first to erase the entire flash and fall back
to the old method if the operation fails.
Signed-off-by: Larisa Ileana Grigore <larisa.grigore@nxp.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Throughout the Automake files, there is a consistent pattern somewhat
like this:
FOO_BINS = ....
sbin_PROGRAMS += $(FOO_BINS)
This commit all such patterns whenever the variable is not used anywhere
else and appends to the target directly.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit removes the C header files from the EXTRA_DIST variables
and instead assigns them to the SOURCE variable of the respective
components they belong to.
This takes care of having them distributed in the release tar ball and
helps with dependency tracking a little.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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8f627247f6("mtd-utils: move libmtd source files to lib/ subdirectory")
removed fectest.c from the build system 10 years ago. Add it again.
Signed-off-by: Bastian Germann <bastiangermann@fishpost.de>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: Bastian Germann <bastiangermann@fishpost.de>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit fixes some uses of strncpy that could leave the destination
buffer unterminated.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This patch modifies the internal helpers to read and parse integers
from sysfs files by initializing them first and removes turns an
obscure "a = open(...) if (a >= 0) {...} if (a == -1) {...}" inside
recv_image into a more straight forward if/else branch.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This patch restructures various code parts that follow the pattern
of "stat(x, &sb) ... makes_sense(&sb) ... open(x)".
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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There are flashes which have gaps between OTP regions and flashes where
the regions don't start at 0 (for example the Winbond 25Q series, which
has three 256 bytes OTP regions starting at 0x1000, 0x2000 and 0x3000).
At the moment it is impossible to dump the OTP memory. Fix it by passing
an optional offset parameter.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The existing code had multiple error handling labels and did things
like checking if a buffer is not NULL before freeing it.
This patch collapses all of this into a single label. We can do this,
because the standard guarantees us that it is safe to call free() with
a NULL pointer.
This also has the side effect of removing the possibility of using the
wrong error label and accidentally leaking something.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Sometimes there's a need to erase the whole device when
programming an image, and not just the area under the
image itself.
Therefore, option -A/--erase-all has been added which
erases the whole device before writing the image.
Signed-off-by: Andrij Abyzov <drolevar@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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flashcp was always showing 0% progress due to incorrect
printf format specifier.
Signed-off-by: Andrij Abyzov <drolevar@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Fix warnings abot PRIdoff_t in libmtd.c, in mtd_read (and mtd_write):
In file included from ../git/lib/libmtd.c:40:0:
../git/lib/libmtd.c: In function 'mtd_read':
../git/include/common.h:110:18: warning: format '%ld' expects argument of
type 'long int', but argument 5 has type 'off_t {aka long long int}'
[-Wformat=]
../git/include/common.h:120:2: note: in expansion of macro 'errmsg'
errmsg(fmt, ##__VA_ARGS__); \
^~~~~~
../git/lib/libmtd.c:1082:10: note: in expansion of macro 'sys_errmsg'
return sys_errmsg("cannot seek mtd%d to offset %"PRIdoff_t,
^~~~~~~~~~
/usr/lib/klibc/include/inttypes.h:28:17: note: format string is defined here
#define PRId32 "d"
Signed-off-by: Thorsten Glaser <tg@mirbsd.org>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This patch adds a program called "lsmtd". The program produces a pretty
printed list of the hierarchy of UBI and MTD devices on a system. It
tries to imitate the lsblk program from util-linux as closely as
possible.
A number of command line switches are available to fine tune what information
should be exposed and in what output format.
The goal is to have a simple way of displaying the complete MTD stack on
a system in a human readable form instead of piecing details together
from proc files and various UBI utilities.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Currently, Jffs2 clean marker is not written actually, because the oob
write length is set to 0 when do mtd_write().
So, get OOB available size at first, and set the correct clean marker
length, then program clean marker to free OOB area.
Fixes: d7e86124d55b ("mtd-utils: Support jffs2 flash-erase for large OOB (>32b)")
Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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mtd_debug: Remove a duplicate if case. MTD_CAP_NANDFLASH has only one
flag set (MTD_WRITEABLE). Directly below, we had a check for
MTD_WRITEABLE in the else branch which can't possible ever have
triggered. Checking for MTD_WRITEABLE in addition to the CAP constants
was probably not intended anyway, given the check for the individual
flags if all else fails.
integck: We already established that "r" is less than the number of
elements in the list, so the loop condition doesn't need to check
if w is NULL in addition. At least this way, the compiler "gets"
that w cannot be NULL below and doesn't issue warnings.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Now that C++17 introduced a special fallthrough keyword for
explicitly tagging switch cases that are supposed to fall
through, newer gcc versions also implement a feature request
from 2002 to warn about maybe unwanted fall-throughs in switch
cases in other languages (like C).
For C code, we can either add a gcc specific attribute at the
end of the switch case, or use a special comment that gcc checks
for, indicating that the fall-through behaviour is indeed
intended.
This patch adds a "/* fall-through */" comment at the end of
various case blocks to silence gcc warnings and in some cases
a break, where fall-through was probably not intended.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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A common pattern in command line processing is having a usage()
function that prints out how to use the command line options and
then terminates.
The function is typically used inside a switch block for command
line options like `-h' or unknown options. In a lot of places, the
break keyword is omitted, because the function exits anyway. However,
this triggers gcc warnings about implicit fall-through.
Rather than adding a phony "/* fall-through */" this patch flags the
usage() style function with a gcc attribute, indicating that they do
not return and removes further superfluous break statements.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Technically it is initializied in the for loop right before being
used. From the conditional above, we know that the for loop is
executed at least once and the variable is always initialized, but
gcc doesn't appear to perform the same reasoning.
This patch adds an initialization of the variable for the sake of
making the compiler happy.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This patch eliminates warnings generated by the -Wmissing-prototypes
option. With this flag set, we are now forced to have prototypes for
all global, exported functions, that have to be made visible to the
definitions and we are forced to mark all local functions as static.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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We can use return with the exit code instead of the sliglty odd exit,
return pattern.
Signed-off-by: Daniel Wagner <daniel.wagner@siemens.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The EXIT_{FAILURE|SUCCESS} are already defined in stdlib.h.
Signed-off-by: Daniel Wagner <daniel.wagner@siemens.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Make the usage of exit consist. That is use the pre defined exit
values.
Signed-off-by: Daniel Wagner <daniel.wagner@siemens.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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"flash_erase" fails on nand flash with JFFS2 that has OOB size greater than
32 bytes. "flash_erase" uses "MEMGETOOSEL" to determine OOB size. This ioctl
call is obsolete and returns error if OOB size is more than 32 bytes.
This patch fixes this issue by using "mtd_write" to update clean-marker
instead of mtd_oob_write. This fix is based on the discussion:
http://lists.infradead.org/pipermail/linux-mtd/2011-September/037958.html.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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To be independent on the size of off_t the format specifier determined of
common.h should be used instead of PRIu64.
Signed-off-by: Torsten Fleischer <torfl6749@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Add correct casting for filestat.st_size in flashcp.c. While the
interim status updates had correct casting from commit 08b243, the
final update was not.
Signed-off-by: Jonathan Fether <jonf@mds.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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