From 801e00d3a1b78b7f71675fae79946ff4aa3ee070 Mon Sep 17 00:00:00 2001 From: Benjamin Berg Date: Thu, 19 Sep 2024 14:45:04 +0200 Subject: [PATCH] um: Set parent death signal for userspace process Enable PR_SET_PDEATHSIG so that the UML userspace process will be killed when the kernel exits unexpectedly. Signed-off-by: Benjamin Berg Link: https://patch.msgid.link/20240919124511.282088-4-benjamin@sipsolutions.net Signed-off-by: Johannes Berg --- arch/um/kernel/skas/stub_exe.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/um/kernel/skas/stub_exe.c b/arch/um/kernel/skas/stub_exe.c index bc6ba2e4d8054..04f75c577f1a0 100644 --- a/arch/um/kernel/skas/stub_exe.c +++ b/arch/um/kernel/skas/stub_exe.c @@ -32,6 +32,9 @@ noinline static void real_init(void) /* set a nice name */ stub_syscall2(__NR_prctl, PR_SET_NAME, (unsigned long)"uml-userspace"); + /* Make sure this process dies if the kernel dies */ + stub_syscall2(__NR_prctl, PR_SET_PDEATHSIG, SIGKILL); + /* read information from STDIN and close it */ res = stub_syscall3(__NR_read, 0, (unsigned long)&init_data, sizeof(init_data)); -- 2.50.1