USB: usbfs: Don't WARN about excessively large memory allocations
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 87% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
USB: usbfs: Don't WARN about excessively large memory allocations
Syzbot found that the kernel generates a WARNing if the user tries to
submit a bulk transfer through usbfs with a buffer that is way too
large. This isn't a bug in the kernel; it's merely an invalid request
from the user and the usbfs code does handle it correctly.
In theory the same thing can happen with async transfers, or with the
packet descriptor table for isochronous transfers.
To prevent the MM subsystem from complaining about these bad
allocation requests, add the __GFP_NOWARN flag to the kmalloc calls
for these buffers.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/2ab21d6e1411999b5fb43434f421f00bf50002ebhttps://git.kernel.org/stable/c/2c835fede13e03f2743a333e4370b5ed2db91e83https://git.kernel.org/stable/c/4f2629ea67e7225c3fd292c7fe4f5b3c9d6392dehttps://git.kernel.org/stable/c/8d83f109e920d2776991fa142bb904d985dca2edhttps://git.kernel.org/stable/c/9f7cb3f01a10d9064cf13b3d26fb7e7a5827d098