Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/xive: propagate IPI init errors to prevent use-after-free When xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails), the error path frees the global xive_ipis array. However, xive_smp_probe() previously ignored this failure and proceeded to call xive_setup_cpu_ipi(), which dereferences the already-freed xive_ipis pointer -- a use-after-free. Now that xive_smp_probe() returns int (previous patch), propagate the error from xive_init_ipis() and xive_setup_cpu_ipi() through xive_smp_probe(). Check the return value in both pnv_smp_probe() and pSeries_smp_probe() so that IPI setup is aborted cleanly on failure, avoiding the use-after-free.
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
243e25112d06b348f087a6f7aba4bbc288285bdd to < 89e1caa5b0aafe23e9938d9a311e9d41baee583eaffected243e25112d06b348f087a6f7aba4bbc288285bdd to < e36b1c2eafcaaddefa70d55e6fda74cf6cda38afaffected243e25112d06b348f087a6f7aba4bbc288285bdd to < 2ea6238343691309e68308131c7e80c3ae05afeaaffected243e25112d06b348f087a6f7aba4bbc288285bdd to < 5c9ab0c9cede9f149733d330e2d7d45341b71359affected243e25112d06b348f087a6f7aba4bbc288285bdd to < c554a8d376d5aea1b237ed6bef6f9fbfc550e67faffected243e25112d06b348f087a6f7aba4bbc288285bdd to < 411a3c016e7a95f5fa105a0587e07d0647a77727affected
Linux Linux
Default version status: affected
4.12affected0 to < 4.12unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.114 to ≤ 6.12.*unaffected6.18.57 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/89e1caa5b0aafe23e9938d9a311e9d41baee583e ↗
- https://git.kernel.org/stable/c/e36b1c2eafcaaddefa70d55e6fda74cf6cda38af ↗
- https://git.kernel.org/stable/c/2ea6238343691309e68308131c7e80c3ae05afea ↗
- https://git.kernel.org/stable/c/5c9ab0c9cede9f149733d330e2d7d45341b71359 ↗
- https://git.kernel.org/stable/c/c554a8d376d5aea1b237ed6bef6f9fbfc550e67f ↗
- https://git.kernel.org/stable/c/411a3c016e7a95f5fa105a0587e07d0647a77727 ↗