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um: Set parent death signal for userspace process

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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>
Link: https://patch.msgid.link/20240919124511.282088-4-benjamin@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg
2024-09-19 14:45:04 +02:00
committed by Johannes Berg
parent 32e8eaf263
commit 801e00d3a1
1 changed files with 3 additions and 0 deletions
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arch/um/kernel/skas/stub_exe.c
+3
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@@ -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));