Vulnerability CVE-2024-35847
Published: 2024-05-17

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

irqchip/gic-v3-its: Prevent double free on error

The error handling path in its_vpe_irq_domain_alloc() causes a double free
when its_vpe_init() fails after successfully allocating at least one
interrupt. This happens because its_vpe_irq_domain_free() frees the
interrupts along with the area bitmap and the vprop_page and
its_vpe_irq_domain_alloc() subsequently frees the area bitmap and the
vprop_page again.

Fix this by unconditionally invoking its_vpe_irq_domain_free() which
handles all cases correctly and by removing the bitmap/vprop_page freeing
from its_vpe_irq_domain_alloc().

[ tglx: Massaged change log ]

 References:
https://git.kernel.org/stable/c/f5417ff561b8ac9a7e53c747b8627a7ab58378ae
https://git.kernel.org/stable/c/b72d2b1448b682844f995e660b77f2a1fabc1662
https://git.kernel.org/stable/c/aa44d21574751a7d6bca892eb8e0e9ac68372e52
https://git.kernel.org/stable/c/5dbdbe1133911ca7d8466bb86885adec32ad9438
https://git.kernel.org/stable/c/dd681710ab77c8beafe2e263064cb1bd0e2d6ca9
https://git.kernel.org/stable/c/03170e657f62c26834172742492a8cb8077ef792
https://git.kernel.org/stable/c/5b012f77abde89bf0be8a0547636184fea618137
https://git.kernel.org/stable/c/c26591afd33adce296c022e3480dea4282b7ef91
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