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Code Issues Releases Activity

linuxulator: fix stack memory disclosure in linux_sigaltstack

Browse Source 
admbugs:	765
Reported by:	Vlad Tsyrklevich <vlad@tsyrklevich.net>
Reviewed by:	andrew
MFC after:	1 day
Security:	Kernel memory disclosure
Sponsored by:   The FreeBSD Foundation
This commit is contained in:
Ed Maste 2019-01-21 16:25:40 +00:00
parent 9866e7bbae
commit 1b1f24b936
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=343262
1 changed files with 1 additions and 0 deletions
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sys/amd64/linux/linux_machdep.c
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@ -201,6 +201,7 @@ linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
l_stack_t lss; l_stack_t lss;
int error; int error;
memset(&lss, 0, sizeof(lss));
LINUX_CTR2(sigaltstack, "%p, %p", uap->uss, uap->uoss); LINUX_CTR2(sigaltstack, "%p, %p", uap->uss, uap->uoss);
if (uap->uss != NULL) { if (uap->uss != NULL) {