CVS commit: src/sys/arch/x86/x86

["Takahiro Kambe" <taca%netbsd.org@localhost>]

Module Name:    src
Committed By:   taca
Date:           Fri Nov  1 15:01:27 UTC 2019

Modified Files:
        src/sys/arch/x86/x86: cpu_rng.c

Log Message:
Check CPU support of RDRAND before calling cpu_rng_rdrand().

cpu_earlyrng() checks CPU support of RDSEED and RDRAND before calling
cpu_rng_rdseed() and cpu_rng_rdrand().

But cpu_rng_rdseed() did not check CPU support of RDRAND and system had
crashed on such an environment.  There is no such case with real CPU but
some VM environment.

Fix kern/54655 and confirmed by msaitoh@.

Needs pullup to netbsd-9.


To generate a diff of this commit:
cvs rdiff -u -r1.9 -r1.10 src/sys/arch/x86/x86/cpu_rng.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.