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0ea5544555
This commit fixes a format truncation issue arosed by the snprintf
function potentially writing more characters into the ring->name buffer
than it can hold, in the amdgpu_gfx_kiq_init_ring function
The issue occurred because the '%d' format specifier could write between
1 and 10 bytes into a region of size between 0 and 8, depending on the
values of xcc_id, ring->me, ring->pipe, and ring->queue. The snprintf
function could output between 12 and 41 bytes into a destination of size
16, leading to potential truncation.
To resolve this, the snprintf line was modified to use the '%hhu' format
specifier for xcc_id, ring->me, ring->pipe, and ring->queue. The '%hhu'
specifier is used for unsigned char variables and ensures that these
values are printed as unsigned decimal integers.
Fixes the below with gcc W=1:
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c: In function ‘amdgpu_gfx_kiq_init_ring’:
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c:332:61: warning: ‘%d’ directive output may be truncated writing between 1 and 10 bytes into a region of size between 0 and 8 [-Wformat-truncation=]
332 | snprintf(ring->name, sizeof(ring->name), "kiq_%d.%d.%d.%d",
| ^~
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c:332:50: note: directive argument in the range [0, 2147483647]
332 | snprintf(ring->name, sizeof(ring->name), "kiq_%d.%d.%d.%d",
| ^~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c:332:9: note: ‘snprintf’ output between 12 and 41 bytes into a destination of size 16
332 | snprintf(ring->name, sizeof(ring->name), "kiq_%d.%d.%d.%d",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
333 | xcc_id, ring->me, ring->pipe, ring->queue);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.