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

Vulnerability 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