ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut
Number of MW LUTs depends on NTB configuration and can be set to zero,
in such scenario rounddown_pow_of_two will cause undefined behaviour and
should not be performed.
This patch ensures that rounddown_pow_of_two is called on valid value.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/186615f8855a0be4ee7d3fcd09a8ecc10e783b08https://git.kernel.org/stable/c/1a867d0d79a4a570a33f2f433919ad2bd7a27b67https://git.kernel.org/stable/c/2e4d5e8d86a969318340be95470bb76e52392082https://git.kernel.org/stable/c/5590cd04d6845c01a6bad985a491c58af6fb5389https://git.kernel.org/stable/c/a11d03d116eef138a7249202bd772c8e61915aechttps://git.kernel.org/stable/c/a133e3caf844a3f56b6eef89ddaa66115874f6bdhttps://git.kernel.org/stable/c/d0559d07afabfddaaded6a61a16154486b956764https://git.kernel.org/stable/c/d652ef399f131fcd5f8f34266167449ee7c9e5b3