Description
In the Linux kernel, the following vulnerability has been resolved: mtd: docg3: fix use-after-free in docg3_release() In docg3_release(), the docg3 pointer is obtained from cascade->floors[0]->priv before the loop that calls doc_release_device() on each floor. doc_release_device() frees the docg3 struct via kfree(docg3) at line 1881. After the loop, docg3->cascade->bch dereferences the already-freed pointer. Fix this by accessing cascade->bch directly, which is equivalent since docg3->cascade points back to the same cascade struct, and is already available as a local variable. This also removes the now-unused docg3 local variable.
Product status
c8ae3f744ddca0da164bcacee42d1d4b6fe7027d (git) before 8408655ec8344511667b61d8257dc59c80ee3391
c8ae3f744ddca0da164bcacee42d1d4b6fe7027d (git) before f5d2ed4ed47d3906e2495a3537a48b127f497a17
c8ae3f744ddca0da164bcacee42d1d4b6fe7027d (git) before 2bf706fe7831b319f23a85b9728f961cfed40c3e
c8ae3f744ddca0da164bcacee42d1d4b6fe7027d (git) before d26f8c361f751c188b7ebaf8189aa0258968fd98
c8ae3f744ddca0da164bcacee42d1d4b6fe7027d (git) before 16f6588a3b7a2a20d10ad9b766be74c60ba347cc
c8ae3f744ddca0da164bcacee42d1d4b6fe7027d (git) before d89044889ecd11b0c2f86663597246e9bdd25679
c8ae3f744ddca0da164bcacee42d1d4b6fe7027d (git) before d49628d63d4e6bbc8a1621afb88e5fc901611bee
c8ae3f744ddca0da164bcacee42d1d4b6fe7027d (git) before ca19808bc6fac7e29420d8508df569b346b3e339
5.8
Any version before 5.8
5.10.258 (semver)
5.15.209 (semver)
6.1.175 (semver)
6.6.140 (semver)
6.12.86 (semver)
6.18.27 (semver)
7.0.4 (semver)
7.1-rc1 (original_commit_for_fix)
References
git.kernel.org/...c/8408655ec8344511667b61d8257dc59c80ee3391
git.kernel.org/...c/f5d2ed4ed47d3906e2495a3537a48b127f497a17
git.kernel.org/...c/2bf706fe7831b319f23a85b9728f961cfed40c3e
git.kernel.org/...c/d26f8c361f751c188b7ebaf8189aa0258968fd98
git.kernel.org/...c/16f6588a3b7a2a20d10ad9b766be74c60ba347cc
git.kernel.org/...c/d89044889ecd11b0c2f86663597246e9bdd25679
git.kernel.org/...c/d49628d63d4e6bbc8a1621afb88e5fc901611bee
git.kernel.org/...c/ca19808bc6fac7e29420d8508df569b346b3e339