Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 to < 0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0affected2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 to < 927a2580208e0f9b0b47b08f1c802b7233a7ba3caffected2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 to < ec5f1b54ceb23475049ada6e7a43452cf4df88d1affected2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 to < ca64edd7ae93402af2596a952e0d94d545e2b9c0affected2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 to < fae9b1776f53aab93ab345bdbf653b991aed717daffected2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 to < 7cf2fb51175cafe01df8c43fa15a06194a59c6e2affected2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 to < 02e9e9366fefe461719da5d173385b6685f70319affected
Linux Linux
Default version status: affected
5.9affected0 to < 5.9unaffected5.10.227 to ≤ 5.10.*unaffected5.15.168 to ≤ 5.15.*unaffected6.1.113 to ≤ 6.1.*unaffected6.6.54 to ≤ 6.6.*unaffected6.10.13 to ≤ 6.10.*unaffected6.11.2 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0 ↗
- https://git.kernel.org/stable/c/927a2580208e0f9b0b47b08f1c802b7233a7ba3c ↗
- https://git.kernel.org/stable/c/ec5f1b54ceb23475049ada6e7a43452cf4df88d1 ↗
- https://git.kernel.org/stable/c/ca64edd7ae93402af2596a952e0d94d545e2b9c0 ↗
- https://git.kernel.org/stable/c/fae9b1776f53aab93ab345bdbf653b991aed717d ↗
- https://git.kernel.org/stable/c/7cf2fb51175cafe01df8c43fa15a06194a59c6e2 ↗
- https://git.kernel.org/stable/c/02e9e9366fefe461719da5d173385b6685f70319 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗