CVE-2024-46745 Information

Description

In the Linux kernel the following vulnerability has been resolved:

Input: uinput - reject requests with unreasonable number of slots

When exercising uinput interface syzkaller may try setting up device with a really large number of slots which causes memory allocation failure in input_mt_init_slots(). While this allocation failure is handled properly and request is rejected it results in syzkaller reports. Additionally such request may put undue burden on the system which will try to free a lot of memory for a bogus request.

Fix it by limiting allowed number of slots to 100. This can easily be extended if we see devices that can track more than 100 contacts.

Reference

https://git.kernel.org/stable/c/9c6d189f0c1c59ba9a32326ec82a0b367a3cd47b https://git.kernel.org/stable/c/597ff930296c4c8fc6b6a536884d4f1a7187ec70 https://git.kernel.org/stable/c/51fa08edd80003db700bdaa099385c5900d27f4b https://git.kernel.org/stable/c/9719687398dea8a6a12a10321a54dd75eec7ab2d https://git.kernel.org/stable/c/61df76619e270a46fd427fbdeb670ad491c42de2 https://git.kernel.org/stable/c/a4858b00a1ec57043697fb935565fe267f161833 https://git.kernel.org/stable/c/d76fc0f0b18d49b7e721c9e4975ef4bffde2f3e7 https://git.kernel.org/stable/c/206f533a0a7c683982af473079c4111f4a0f9f5e