John Baldwin 5e61abf740 Check the magic value in longjmp() before calling sigprocmask().
This avoids passing garbage to sigprocmask() if the jump buffer is
invalid.

Reviewed by:	mhorne
Obtained from:	CheriBSD
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D24483
2020-04-21 17:40:23 +00:00
..