CVE-2024-58085 Information

Description

In the Linux kernel the following vulnerability has been resolved:

tomoyo: don’t emit warning in tomoyo_write_control()

syzbot is reporting too large allocation warning at tomoyo_write_control() for one can write a very very long line without new line character. To fix this warning I use __GFP_NOWARN rather than checking for KMALLOC_MAX_SIZE for practically a valid line should be always shorter than 32KB where the oo small to fail\ memory-allocation rule applies.

One might try to write a valid line that is longer than 32KB but such request will likely fail with -ENOMEM. Therefore I feel that separately returning -EINVAL when a line is longer than KMALLOC_MAX_SIZE is redundant. There is no need to distinguish over-32KB and over-KMALLOC_MAX_SIZE.

Reference

https://git.kernel.org/stable/c/3df7546fc03b8f004eee0b9e3256369f7d096685 https://git.kernel.org/stable/c/414705c0303350d139b1dc18f329fe47dfb642dd https://git.kernel.org/stable/c/a01c200fa7eb59da4d2dbbb48b61f4a0d196c09f https://git.kernel.org/stable/c/c9382f380e8d09209b8e5c0def0545852168be25 https://git.kernel.org/stable/c/fe1c021eb03dae0dc9dce55e81f77a60e419a27a