CVE-2023-52989
firewire: fix memory leak for payload of request subaction to IEC 61883-1 FCP region
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firewire: fix memory leak for payload of request subaction to IEC 61883-1 FCP region
In the Linux kernel, the following vulnerability has been resolved: firewire: fix memory leak for payload of request subaction to IEC 61883-1 FCP region This patch is fix for Linux kernel v2.6.33 or later. For request subaction to IEC 61883-1 FCP region, Linux FireWire subsystem have had an issue of use-after-free. The subsystem allows multiple user space listeners to the region, while data of the payload was likely released before the listeners execute read(2) to access to it for copying to user space. The issue was fixed by a commit 281e20323ab7 ("firewire: core: fix use-after-free regression in FCP handler"). The object of payload is duplicated in kernel space for each listener. When the listener executes ioctl(2) with FW_CDEV_IOC_SEND_RESPONSE request, the object is going to be released. However, it causes memory leak since the commit relies on call of release_request() in drivers/firewire/core-cdev.c. Against the expectation, the function is never called due to the design of release_client_resource(). The function delegates release task to caller when called with non-NULL fourth argument. The implementation of ioctl_send_response() is the case. It should release the object explicitly. This commit fixes the bug.
Reserved 2025-03-27 | Published 2025-03-27 | Updated 2025-05-04 | Assigner Linuxgit.kernel.org/...c/b2cd3947d116bb9ba7ff097b5fc747a8956764db
git.kernel.org/...c/356ff89acdbe6a66019154bc7eb2d300f5b15103
git.kernel.org/...c/53785fd9b315583cf029e39f72b73d23704a2253
git.kernel.org/...c/d5a2dcee53fa6e6e2822f93cb3f1b0cd23163bee
git.kernel.org/...c/5f4543c9382ae2d5062f6aa4fecae0c9258d0b0e
git.kernel.org/...c/c8bdc88216f09cb7387fedbdf613524367328616
git.kernel.org/...c/531390a243ef47448f8bad01c186c2787666bf4d
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