net: rds: fix MR cleanup on copy error
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
net: rds: fix MR cleanup on copy error
__rds_rdma_map() hands sg/pages ownership to the transport after
get_mr() succeeds. If copying the generated cookie back to user space
fails after that point, the error path must not free those resources
again before dropping the MR reference.
Remove the duplicate unpin/free from the put_user() failure branch so
that MR teardown is handled only through the existing final cleanup
path.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/033370ffb3c9c0264d19f8ba9ef769523266589ahttps://git.kernel.org/stable/c/106dc689206610cfa2098f593fdd1e020c997835https://git.kernel.org/stable/c/8141a2dc70080eda1aedc0389ed2db2b292af5bdhttps://git.kernel.org/stable/c/8fdbb6262a4a3ed44a0830a7793903b54bb27bdchttps://git.kernel.org/stable/c/91a44b406bc1f9e1c5da0cb7d0d5991b43b79147https://git.kernel.org/stable/c/b3cb8cae530b2727d8245684148bb49425f6765chttps://git.kernel.org/stable/c/d95cea9298be1ba8876e3f156be96d3a492085cahttps://git.kernel.org/stable/c/ec55a86f7fba7d9111df94b9c11a4755ed492995