Description
In the Linux kernel, the following vulnerability has been resolved: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.
Product status
81819f0fc8285a2a5a921c019e3e3d7b6169d225 before 872f2c34ff232af1e65ad2df86d61163c8ffad42
81819f0fc8285a2a5a921c019e3e3d7b6169d225 before f66012909e7bf383fcdc5850709ed5716073fdc4
81819f0fc8285a2a5a921c019e3e3d7b6169d225 before 7e287256904ee796c9477e3ec92b07f236481ef3
81819f0fc8285a2a5a921c019e3e3d7b6169d225 before 1f0797f17927b5cad0fb7eced422f9a7c30a3191
81819f0fc8285a2a5a921c019e3e3d7b6169d225 before 0ef7058b4dc6fcef622ac23b45225db57f17b83f
81819f0fc8285a2a5a921c019e3e3d7b6169d225 before dda6ec365ab04067adae40ef17015db447e90736
81819f0fc8285a2a5a921c019e3e3d7b6169d225 before 3baa1da473e6e50281324ff1d332d1a07a3bb02e
81819f0fc8285a2a5a921c019e3e3d7b6169d225 before b4efccec8d06ceb10a7d34d7b1c449c569d53770
2.6.22
Any version before 2.6.22
5.4.299
5.10.243
5.15.192
6.1.151
6.6.105
6.12.46
6.16.6
6.17
References
git.kernel.org/...c/872f2c34ff232af1e65ad2df86d61163c8ffad42
git.kernel.org/...c/f66012909e7bf383fcdc5850709ed5716073fdc4
git.kernel.org/...c/7e287256904ee796c9477e3ec92b07f236481ef3
git.kernel.org/...c/1f0797f17927b5cad0fb7eced422f9a7c30a3191
git.kernel.org/...c/0ef7058b4dc6fcef622ac23b45225db57f17b83f
git.kernel.org/...c/dda6ec365ab04067adae40ef17015db447e90736
git.kernel.org/...c/3baa1da473e6e50281324ff1d332d1a07a3bb02e
git.kernel.org/...c/b4efccec8d06ceb10a7d34d7b1c449c569d53770
