CVE-2024-47748
vhost_vdpa: assign irq bypass producer token correctly
We use these services and cookies to improve your user experience. You may opt out if you wish, however, this may limit some features on this site.
Please see our statement on Data Privacy.
vhost_vdpa: assign irq bypass producer token correctly
In the Linux kernel, the following vulnerability has been resolved: vhost_vdpa: assign irq bypass producer token correctly We used to call irq_bypass_unregister_producer() in vhost_vdpa_setup_vq_irq() which is problematic as we don't know if the token pointer is still valid or not. Actually, we use the eventfd_ctx as the token so the life cycle of the token should be bound to the VHOST_SET_VRING_CALL instead of vhost_vdpa_setup_vq_irq() which could be called by set_status(). Fixing this by setting up irq bypass producer's token when handling VHOST_SET_VRING_CALL and un-registering the producer before calling vhost_vring_ioctl() to prevent a possible use after free as eventfd could have been released in vhost_vring_ioctl(). And such registering and unregistering will only be done if DRIVER_OK is set.
Reserved 2024-09-30 | Published 2024-10-21 | Updated 2025-05-04 | Assigner Linuxgit.kernel.org/...c/0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0
git.kernel.org/...c/927a2580208e0f9b0b47b08f1c802b7233a7ba3c
git.kernel.org/...c/ec5f1b54ceb23475049ada6e7a43452cf4df88d1
git.kernel.org/...c/ca64edd7ae93402af2596a952e0d94d545e2b9c0
git.kernel.org/...c/fae9b1776f53aab93ab345bdbf653b991aed717d
git.kernel.org/...c/7cf2fb51175cafe01df8c43fa15a06194a59c6e2
git.kernel.org/...c/02e9e9366fefe461719da5d173385b6685f70319
Support options
