qemu-kvm/SOURCES/kvm-seccomp-fix-killing-of-whole-process-instead-of-thre.patch

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From 2edf1c3a2ee65ef0e4f6bd4f8de650e529f5481d Mon Sep 17 00:00:00 2001
From: Eduardo Otubo <otubo@redhat.com>
Date: Tue, 15 Sep 2020 15:15:49 -0400
Subject: [PATCH] seccomp: fix killing of whole process instead of thread
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Eduardo Otubo <otubo@redhat.com>
Message-id: <20200915151549.5007-1-otubo@redhat.com>
Patchwork-id: 98392
O-Subject: [RHEL-AV-8.3.0/RHEL-8.3.0 qemu-kvm PATCH] seccomp: fix killing of whole process instead of thread
Bugzilla: 1890885
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Daniel P. Berrange <berrange@redhat.com>
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1752376
BRANCH: rhel-av-8.3.0
UPSTREAM: Merged
BREW: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=31339152
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1752376
BRANCH: rhel-8.3.0
UPSTREAM: Merged
BREW: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=31339111
From: Daniel P. Berrangé <berrange@redhat.com>
Back in 2018 we introduced support for killing the whole QEMU process
instead of just one thread, when a seccomp rule is violated:
commit bda08a5764d470f101fa38635d30b41179a313e1
Author: Marc-André Lureau <marcandre.lureau@redhat.com>
Date: Wed Aug 22 19:02:48 2018 +0200
seccomp: prefer SCMP_ACT_KILL_PROCESS if available
Fast forward a year and we introduced a patch to avoid killing the
process for resource control syscalls tickled by Mesa.
commit 9a1565a03b79d80b236bc7cc2dbce52a2ef3a1b8
Author: Daniel P. Berrangé <berrange@redhat.com>
Date: Wed Mar 13 09:49:03 2019 +0000
seccomp: don't kill process for resource control syscalls
Unfortunately a logic bug effectively reverted the first commit
mentioned so that we go back to only killing the thread, not the whole
process.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Eduardo Otubo <otubo@redhat.com>
(cherry picked from commit e474e3aacf4276eb0781d11c45e2fab996f9dc56)
Signed-off-by: Eduardo Otubo <otubo@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
qemu-seccomp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/qemu-seccomp.c b/qemu-seccomp.c
index e0a1829b3dd..8325ecb766e 100644
--- a/qemu-seccomp.c
+++ b/qemu-seccomp.c
@@ -136,8 +136,9 @@ static uint32_t qemu_seccomp_get_action(int set)
if (qemu_seccomp(SECCOMP_GET_ACTION_AVAIL, 0, &action) == 0) {
kill_process = 1;
+ } else {
+ kill_process = 0;
}
- kill_process = 0;
}
if (kill_process == 1) {
return SCMP_ACT_KILL_PROCESS;
--
2.27.0