CVE-2024-26993
fs: sysfs: Fix reference leak in sysfs_break_active_protection()
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fs: sysfs: Fix reference leak in sysfs_break_active_protection()
In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL.
Reserved 2024-02-19 | Published 2024-05-01 | Updated 2024-12-19 | Assigner Linuxgit.kernel.org/...c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5
git.kernel.org/...c/57baab0f376bec8f54b0fe6beb8f77a57c228063
git.kernel.org/...c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17
git.kernel.org/...c/43f00210cb257bcb0387e8caeb4b46375d67f30c
git.kernel.org/...c/5d43e072285e81b0b63cee7189b3357c7768a43b
git.kernel.org/...c/ac107356aabc362aaeb77463e814fc067a5d3957
git.kernel.org/...c/a4c99b57d43bab45225ba92d574a8683f9edc8e4
git.kernel.org/...c/a90bca2228c0646fc29a72689d308e5fe03e6d78
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