git: 7dddc1074434 - stable/12 - linux: make sure to zero the l_siginfo structure for ptrace(2)

[Ed Maste]

The branch stable/12 has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=7dddc107443465b59fe05843ed57909714100f3c

commit 7dddc107443465b59fe05843ed57909714100f3c
Author:     Edward Tomasz Napierala <trasz at FreeBSD.org>
AuthorDate: 2021-06-08 09:18:29 +0000
Commit:     Ed Maste <emaste at FreeBSD.org>
CommitDate: 2021-09-13 14:40:45 +0000

    linux: make sure to zero the l_siginfo structure for ptrace(2)
    
    Reported By:    dchagin
    Sponsored By:   EPSRC
    
    (cherry picked from commit f102b61d0ecffc6d9cc322fa7a48e0927391421b)
---
 sys/amd64/linux/linux_ptrace.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/amd64/linux/linux_ptrace.c b/sys/amd64/linux/linux_ptrace.c
index aab62e3793cb..792572294764 100644
--- a/sys/amd64/linux/linux_ptrace.c
+++ b/sys/amd64/linux/linux_ptrace.c
@@ -408,6 +408,7 @@ linux_ptrace_getsiginfo(struct thread *td, pid_t pid, l_ulong data)
 	}
 
 	sig = bsd_to_linux_signal(lwpinfo.pl_siginfo.si_signo);
+	memset(&l_siginfo, 0, sizeof(l_siginfo));
 	siginfo_to_lsiginfo(&lwpinfo.pl_siginfo, &l_siginfo, sig);
 	error = copyout(&l_siginfo, (void *)data, sizeof(l_siginfo));
 	return (error);