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