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067cdf0203
In psz_init_zones, if the requested area has a total_size less than record_size, kcalloc will be called with c == 0 and will return ZERO_SIZE_PTR. Further, this will lead to an oops. With this patch, in this scenario, it will look like this : [ 6.865545] pstore_zone: total size : 28672 Bytes [ 6.865547] pstore_zone: kmsg size : 65536 Bytes [ 6.865549] pstore_zone: pmsg size : 0 Bytes [ 6.865551] pstore_zone: console size : 0 Bytes [ 6.865553] pstore_zone: ftrace size : 0 Bytes [ 6.872095] pstore_zone: zone dmesg total_size too small [ 6.878234] pstore_zone: alloc zones failed Signed-off-by: Eugen Hristev <eugen.hristev@linaro.org> Link: https://lore.kernel.org/r/20250110125714.2594719-1-eugen.hristev@linaro.org Signed-off-by: Kees Cook <kees@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.