From: Benjamin Berg <benjamin@sipsolutions.net>
To: linux-um@lists.infradead.org
Cc: Benjamin Berg <benjamin.berg@intel.com>
Subject: [PATCH v9 03/10] um: Set parent death signal for userspace process
Date: Thu, 19 Sep 2024 14:45:04 +0200 [thread overview]
Message-ID: <20240919124511.282088-4-benjamin@sipsolutions.net> (raw)
In-Reply-To: <20240919124511.282088-1-benjamin@sipsolutions.net>
From: Benjamin Berg <benjamin.berg@intel.com>
Enable PR_SET_PDEATHSIG so that the UML userspace process will be killed
when the kernel exits unexpectedly.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
---
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 bc6ba2e4d805..04f75c577f1a 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));
--
2.46.0
next prev parent reply other threads:[~2024-09-19 12:45 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-19 12:45 [PATCH v9 00/10] Increased address space for 64 bit Benjamin Berg
2024-09-19 12:45 ` [PATCH v9 01/10] um: Add generic stub_syscall1 function Benjamin Berg
2024-09-19 12:45 ` [PATCH v9 02/10] um: use execveat to create userspace MMs Benjamin Berg
2024-10-16 2:34 ` Nathan Chancellor
2024-10-16 8:19 ` Berg, Benjamin
2024-10-17 7:17 ` David Gow
2024-10-17 8:18 ` Johannes Berg
2024-10-17 12:05 ` Benjamin Berg
2024-10-17 23:17 ` David Gow
2024-10-17 9:01 ` Benjamin Berg
2024-09-19 12:45 ` Benjamin Berg [this message]
2024-09-19 12:45 ` [PATCH v9 04/10] um: Set parent death signal for winch thread/process Benjamin Berg
2024-09-19 12:45 ` [PATCH v9 05/10] um: Add compile time assert that stub fits on a page Benjamin Berg
2024-09-19 12:45 ` [PATCH v9 06/10] um: Calculate stub data address relative to stub code Benjamin Berg
2024-09-19 12:45 ` [PATCH v9 07/10] um: Limit TASK_SIZE to the addressable range Benjamin Berg
2024-09-19 12:45 ` [PATCH v9 08/10] um: Discover host_task_size from envp Benjamin Berg
2024-09-19 12:45 ` [PATCH v9 09/10] um: clear all memory in new userspace processes Benjamin Berg
2024-09-19 12:45 ` [PATCH v9 10/10] um: Switch to 4 level page tables on 64 bit Benjamin Berg
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