CVE-2022-49749
i2c: designware: use casting of u64 in clock multiplication to avoid overflow
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i2c: designware: use casting of u64 in clock multiplication to avoid overflow
In the Linux kernel, the following vulnerability has been resolved: i2c: designware: use casting of u64 in clock multiplication to avoid overflow In functions i2c_dw_scl_lcnt() and i2c_dw_scl_hcnt() may have overflow by depending on the values of the given parameters including the ic_clk. For example in our use case where ic_clk is larger than one million, multiplication of ic_clk * 4700 will result in 32 bit overflow. Add cast of u64 to the calculation to avoid multiplication overflow, and use the corresponding define for divide.
Reserved 2025-03-27 | Published 2025-03-27 | Updated 2025-05-04 | Assigner Linuxgit.kernel.org/...c/ed173f77fd28a3e4fffc13b3f28687b9eba61157
git.kernel.org/...c/2f29d780bd691d20e89e5b35d5e6568607115e94
git.kernel.org/...c/9f36aae9e80e79b7a6d62227eaa96935166be9fe
git.kernel.org/...c/c8c37bc514514999e62a17e95160ed9ebf75ca8d
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