CVE-2021-4460
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix UBSAN shift-out-of-bounds warning If get_num_sdma_queues or get_num_xgmi_sdma_queues is 0, we end up doing a shift operation where the number of bits shifted equals number of bits in the operand. This behaviour is undefined. Set num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the count is >= number of bits in the operand. Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1472
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix UBSAN shift-out-of-bounds warning If get_num_sdma_queues or get_num_xgmi_sdma_queues is 0, we end up doing a shift operation where the number of bits shifted equals number of bits in the operand. This behaviour is undefined. Set num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the count is >= number of bits in the operand. Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1472
05 / REFERENCES
Further evidence
- https://git.kernel.org/stable/c/0c0356ef2498c1a250fe3846f30293f828737309
- https://git.kernel.org/stable/c/1874b0ef1426b873de94c61861e38f29a8df714c
- https://git.kernel.org/stable/c/3fdc5182700910a685d23df57d65166e8556a266
- https://git.kernel.org/stable/c/50e2fc36e72d4ad672032ebf646cecb48656efe0
- https://git.kernel.org/stable/c/9069b1b542de8f3bbffef868aff41521b21485cf