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

EDAC/igen6: Avoid segmentation fault on module unload

The segmentation fault happens because:

During modprobe:

1. In igen6_probe(), igen6_pvt will be allocated with kzalloc()
2. In igen6_register_mci(), mci->pvt_info will point to
   &igen6_pvt->imc[mc]

During rmmod:

1. In mci_release() in edac_mc.c, it will kfree(mci->pvt_info)
2. In igen6_remove(), it will kfree(igen6_pvt);

Fix this issue by setting mci->pvt_info to NULL to avoid the double
kfree.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-56708
• https://git.kernel.org/stable/c/029ac07bb92d2f7502d47a4916f197a8445d83bf
• https://git.kernel.org/stable/c/2a80e710bbc088a2511c159ee4d910456c5f0832
• https://git.kernel.org/stable/c/830cabb61113d92a425dd3038ccedbdfb3c8d079
• https://git.kernel.org/stable/c/db60326f2c47b079e36785ace621eb3002db2088
• https://git.kernel.org/stable/c/e5c7052664b61f9e2f896702d20552707d0ef60a
• https://git.kernel.org/stable/c/fefaae90398d38a1100ccd73b46ab55ff4610fba