Description
In the Linux kernel, the following vulnerability has been resolved: coresight: ETR: Fix ETR buffer use-after-free issue When ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed and enabled again, currently sysfs_buf will point to the newly allocated memory(buf_new) and free the old memory(buf_old). But the etr_buf that is being used by the ETR remains pointed to buf_old, not updated to buf_new. In this case, it will result in a memory use-after-free issue. Fix this by checking ETR's mode before updating and releasing buf_old, if the mode is CS_MODE_SYSFS, then skip updating and releasing it.
Product status
bd2767ec3df2775bc336f441f9068a989ccb919d (git) before 70acbc9c77686b7a521af6d7a543dcd9c324cf07
bd2767ec3df2775bc336f441f9068a989ccb919d (git) before cda077a19f5c8d6ec61e5b97deca203d95e3a422
bd2767ec3df2775bc336f441f9068a989ccb919d (git) before 35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3
fdd3ceb0001da6768bede9779a0190a42e65c404 (git)
6.6
Any version before 6.6
6.17.13 (semver)
6.18.2 (semver)
6.19-rc1 (original_commit_for_fix)
References
git.kernel.org/...c/70acbc9c77686b7a521af6d7a543dcd9c324cf07
git.kernel.org/...c/cda077a19f5c8d6ec61e5b97deca203d95e3a422
git.kernel.org/...c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3
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