Description
In the Linux kernel, the following vulnerability has been resolved: tracing: fprobe events: Fix possible UAF on modules Commit ac91052f0ae5 ("tracing: tprobe-events: Fix leakage of module refcount") moved try_module_get() from __find_tracepoint_module_cb() to find_tracepoint() caller, but that introduced a possible UAF because the module can be unloaded before try_module_get(). In this case, the module object should be freed too. Thus, try_module_get() does not only fail but may access to the freed object. To avoid that, try_module_get() in __find_tracepoint_module_cb() again.
Product status
71c9cf87776eaa556fc0a0a060df94200e1f521c (git) before 868df4eb784c3ccc7e4340a9ea993cbbedca167e
9db2b8cf4ea07b579db588e0353d5680f5d1f071 (git) before a27d2de2472b1cc7d582ab405d1d5832a80481de
ac91052f0ae5be9e46211ba92cc31c0e3b0a933a (git) before 626f01f4d26e8cf92e69c1df53036153c8e98a20
ac91052f0ae5be9e46211ba92cc31c0e3b0a933a (git) before dd941507a9486252d6fcf11814387666792020f3
6.14
Any version before 6.14
6.12.24 (semver)
6.13.12 (semver)
6.14.3 (semver)
6.15 (original_commit_for_fix)
References
git.kernel.org/...c/868df4eb784c3ccc7e4340a9ea993cbbedca167e
git.kernel.org/...c/a27d2de2472b1cc7d582ab405d1d5832a80481de
git.kernel.org/...c/626f01f4d26e8cf92e69c1df53036153c8e98a20
git.kernel.org/...c/dd941507a9486252d6fcf11814387666792020f3
