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Linux kernel source tree
497d370a64
When enabling UBSAN on Raspberry Pi 5, we get the following warning:
[ 387.894977] UBSAN: array-index-out-of-bounds in drivers/gpu/drm/v3d/v3d_sched.c:320:3
[ 387.903868] index 7 is out of range for type '__u32 [7]'
[ 387.909692] CPU: 0 PID: 1207 Comm: kworker/u16:2 Tainted: G WC 6.10.3-v8-16k-numa #151
[ 387.919166] Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT)
[ 387.925961] Workqueue: v3d_csd drm_sched_run_job_work [gpu_sched]
[ 387.932525] Call trace:
[ 387.935296] dump_backtrace+0x170/0x1b8
[ 387.939403] show_stack+0x20/0x38
[ 387.942907] dump_stack_lvl+0x90/0xd0
[ 387.946785] dump_stack+0x18/0x28
[ 387.950301] __ubsan_handle_out_of_bounds+0x98/0xd0
[ 387.955383] v3d_csd_job_run+0x3a8/0x438 [v3d]
[ 387.960707] drm_sched_run_job_work+0x520/0x6d0 [gpu_sched]
[ 387.966862] process_one_work+0x62c/0xb48
[ 387.971296] worker_thread+0x468/0x5b0
[ 387.975317] kthread+0x1c4/0x1e0
[ 387.978818] ret_from_fork+0x10/0x20
[ 387.983014] ---[ end trace ]---
This happens because the UAPI provides only seven configuration
registers and we are reading the eighth position of this u32 array.
Therefore, fix the out-of-bounds read in `v3d_csd_job_run()` by
accessing only seven positions on the '__u32 [7]' array. The eighth
register exists indeed on V3D 7.1, but it isn't currently used. That
being so, let's guarantee that it remains unused and add a note that it
could be set in a future patch.
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.