In the Linux kernel, the following vulnerability has been resolved:

octeontx2-pf: avoid double free of pool->stack on AQ init failure

otx2_pool_aq_init() frees pool->stack when mailbox sync or retry
allocation fails, but leaves the pointer unchanged. Later,
otx2_sq_aura_pool_init() unwinds the partial setup through
otx2_aura_pool_free(), which frees pool->stack again. The CN20K-specific
cn20k_pool_aq_init() implementation has the same bug in
its corresponding error path.

Set pool->stack to NULL immediately after the local free so the shared
cleanup path does not free the same stack again while cleaning up
partially initialized pool state.

The bug was first flagged by an experimental analysis tool we are
developing for kernel memory-management bugs while analyzing
v6.13-rc1. The tool is still under development and is not yet publicly
available. Manual inspection confirms that the bug is still present in
v7.1-rc3.

Runtime validation was not performed because reproducing this path
requires OcteonTX2/CN20K hardware.

https://git.kernel.org/stable/c/0488a0bb344fb1992853b60082acff6be8164d74

https://git.kernel.org/stable/c/0d9b9d7dbef976ae7f855b6358f1d703014e96ea

https://git.kernel.org/stable/c/4c29603498b05c049dbbbc47e882f2fbf0193cd7

https://git.kernel.org/stable/c/94192b0579333c3deee2441379aab8ca98fc2e6b

https://git.kernel.org/stable/c/9b244c242bec48b37e82b89787afd6a4c43457e1

https://git.kernel.org/stable/c/b92e7ea408b6f1144648909c9c49a55d245d7300

https://git.kernel.org/stable/c/c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec

https://git.kernel.org/stable/c/e6e9bc0bf963662b7042048ab0281014625d4cb4

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