CVS commit: src/sys/compat

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Wed Jan  1 14:52:38 UTC 2020

Modified Files:
        src/sys/compat/common: kern_sig_43.c
        src/sys/compat/netbsd32: netbsd32_compat_20.c netbsd32_compat_50.c

Log Message:
Fix three stack info leaks, found by kMSan when just invoking all syscalls
with a zero page as argument.

MSan: Uninitialized Stack Memory In copyout() At Offset 0, Variable 'sb32' From compat_20_netbsd32_getfsstat()
MSan: Uninitialized Stack Memory In copyout() At Offset 12, Variable 'oss' From compat_43_sys_sigstack()
MSan: Uninitialized Stack Memory In copyout() At Offset 0, Variable 'sb' From compat_50_netbsd32___fhstat40()


To generate a diff of this commit:
cvs rdiff -u -r1.35 -r1.36 src/sys/compat/common/kern_sig_43.c
cvs rdiff -u -r1.38 -r1.39 src/sys/compat/netbsd32/netbsd32_compat_20.c
cvs rdiff -u -r1.43 -r1.44 src/sys/compat/netbsd32/netbsd32_compat_50.c

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