Description
In the Linux kernel, the following vulnerability has been resolved: xsk: Fix fragment node deletion to prevent buffer leak After commit b692bf9a7543 ("xsk: Get rid of xdp_buff_xsk::xskb_list_node"), the list_node field is reused for both the xskb pool list and the buffer free list, this causes a buffer leak as described below. xp_free() checks if a buffer is already on the free list using list_empty(&xskb->list_node). When list_del() is used to remove a node from the xskb pool list, it doesn't reinitialize the node pointers. This means list_empty() will return false even after the node has been removed, causing xp_free() to incorrectly skip adding the buffer to the free list. Fix this by using list_del_init() instead of list_del() in all fragment handling paths, this ensures the list node is reinitialized after removal, allowing the list_empty() to work correctly.
Product status
560c974b7ccd95bb9ff20df77f6654283e45c9c6 (git) before 5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d
fd5614763805d6f386bd07cc53558f88b1b1eb62 (git) before 2a9ea988465ece5b6896b1bdc144170a64e84c35
b692bf9a7543af7ad11a59d182a3757578f0ba53 (git) before 645c6d8376ad4913cbffe0e0c2cca0c4febbe596
b692bf9a7543af7ad11a59d182a3757578f0ba53 (git) before b38cbd4af5034635cff109e08788c63f956f3a69
b692bf9a7543af7ad11a59d182a3757578f0ba53 (git) before 60abb0ac11dccd6b98fd9182bc5f85b621688861
6.13
Any version before 6.13
6.18.17 (semver)
6.19.7 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d
git.kernel.org/...c/2a9ea988465ece5b6896b1bdc144170a64e84c35
git.kernel.org/...c/645c6d8376ad4913cbffe0e0c2cca0c4febbe596
git.kernel.org/...c/b38cbd4af5034635cff109e08788c63f956f3a69
git.kernel.org/...c/60abb0ac11dccd6b98fd9182bc5f85b621688861