Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in ib_destroy_srq_user() When accessing a SRQ via the netlink path the only synchronization mechanism for the said SRQ is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of ib_destroy_srq_user(), which is too late, since by that point vendor-specific resources associated with the SRQ might already be freed. This can leave a short window where the SRQ remains accessible through restrack, leading to a potential use-after-free. Fix this by moving the rdma_restrack_begin_del() call to the start of ib_destroy_srq_user(), ensuring that the SRQ is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a SRQ that is in the process of destruction. In addition, this change preserves the intended inverted order between create and destroy routines: resources are added to restrack at the end of successful creation, and hence shall be removed from the restrack first thing during the destruction flow, which keeps the lifecycle management consistent and predictable.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 48f8a70e899fa4d9c8f00369f482f0382173ece9 before a5bfd9fe05d5cebbd3e447bf7f7b2c663007d8b9; affected 48f8a70e899fa4d9c8f00369f482f0382173ece9 before d3d0eabe6e39b024deb3e085e2d408d037e967c3; affected 48f8a70e899fa4d9c8f00369f482f0382173ece9 before 9c704383529044c02122f85a2a9a42cbf14a07a6; affected 48f8a70e899fa4d9c8f00369f482f0382173ece9 before bedd7dee72588c838f5b67197ea8b387e7beb918; affected 48f8a70e899fa4d9c8f00369f482f0382173ece9 before 95c992c869df54a6a7061f5f3fb6400244f2af8f; affected 48f8a70e899fa4d9c8f00369f482f0382173ece9 before 88244ecc71cc0b3ed200f5ef7ddea6686adfd730 |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a5bfd9fe05d5cebbd3e447bf7f7b2c663007d8b9
- https://git.kernel.org/stable/c/d3d0eabe6e39b024deb3e085e2d408d037e967c3
- https://git.kernel.org/stable/c/9c704383529044c02122f85a2a9a42cbf14a07a6
- https://git.kernel.org/stable/c/bedd7dee72588c838f5b67197ea8b387e7beb918
- https://git.kernel.org/stable/c/95c992c869df54a6a7061f5f3fb6400244f2af8f
- https://git.kernel.org/stable/c/88244ecc71cc0b3ed200f5ef7ddea6686adfd730