Description
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false, ...), which evaluates to NULL. However, the three call sites in mid8250_probe() and mid8250_remove() unconditionally dereference these function pointers without NULL checks, causing a NULL pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), or Snowridge (SNR) platform. Fix this by adding the missing NULL checks before calling the setup and exit callbacks.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
763d61ded752fbb3116efc951eff4363f237b7e0 to < bdaa8871b53fe9b1730ef64dda2fcd662fd83339affectedc7d190bb07bf4e3b217c69370e94d1b4c80a40ad to < f85a42fb90399dedcf81c146d09c07e4548b1e8caffected0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c to < 4ea933a36a14bec19b71025cdd8407bafbd67ec1affected587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6 to < 1096397c31f6bffa95e77bdd18fbca085be83e10affected977855894bca4b87afa50d21e3f3e85a5a0e901f to < 600dcd548fb2b00a69f447684f52ba45d5a3540eaffected1cd54e217c6e2cdb794a897b2f855e13ffcee586 to < b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56affected9690e8a342632344984af72bc56b7a1fba61e6cb to < 8cbad52ccfa6a7f089cfab34979bc6cc3bff25beaffectedb1b4efea05a56c0995e4702a86d6624b4fdff32f to < 7fb13fd7e9a59a37cd911efff83abe19e3ee029daffected
Linux Linux
Default version status: unaffected
5.10.261 to < 5.10.266affected5.15.212 to < 5.15.217affected6.1.178 to < 6.1.183affected6.6.145 to < 6.6.148affected6.12.96 to < 6.12.101affected6.18.39 to < 6.18.42affected7.1.4 to < 7.1.6affected
References
- https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339 ↗
- https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c ↗
- https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1 ↗
- https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10 ↗
- https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e ↗
- https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56 ↗
- https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be ↗
- https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d ↗