md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
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:
md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
setup_geo() extracts near_copies (nc) and far_copies (fc) from the
user-provided layout parameter without checking for zero. When fc=0
with the "improved" far set layout selected, 'geo->far_set_size =
disks / fc' triggers a divide-by-zero.
Validate nc and fc immediately after extraction, returning -1 if
either is zero.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/0b43a70394ce492274e67463326be03e0a9897c5https://git.kernel.org/stable/c/4af2e558e6fdfb972c61350653fd55d1f62b60a5https://git.kernel.org/stable/c/553e32adfa1a96b217651139a3f8c3b92b9984achttps://git.kernel.org/stable/c/913d556e4bd1b56ed822815655b82c7bb54edc51https://git.kernel.org/stable/c/9aa6d860b0930e2f72795665c42c44252a558a0chttps://git.kernel.org/stable/c/9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cdahttps://git.kernel.org/stable/c/c716ab3034f84f8a6c226814247b8c5ac9f95da1https://git.kernel.org/stable/c/f9ddb621b2325eb69c95692958daf2bab4dea2c4