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tracing/user_events: Track fork/exec/exit for mm lifetime

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During tracefs discussions it was decided instead of requiring a mapping
within a user-process to track the lifetime of memory descriptors we
should hook the appropriate calls. Do this by adding the minimal stubs
required for task fork, exec, and exit. Currently this is just a NOP.
Future patches will implement these calls fully.

Link: https://lkml.kernel.org/r/20230328235219.203-3-beaub@linux.microsoft.com

Suggested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Beau Belgrave 2023-03-28 16:52:09 -07:00 • committed by Steven Rostedt (Google)
parent e5a26a4048
commit fd593511cd
5 changed files with 29 additions and 0 deletions
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2
fs/exec.c
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@ -65,6 +65,7 @@
#include <linux/syscall_user_dispatch.h>
#include <linux/coredump.h>
#include <linux/time_namespace.h>
#include <linux/user_events.h>
#include <linux/uaccess.h>
#include <asm/mmu_context.h>
@ -1859,6 +1860,7 @@ static int bprm_execve(struct linux_binprm *bprm,
current->fs->in_exec = 0;
current->in_execve = 0;
rseq_execve(current);
user_events_execve(current);
acct_update_integrals(current);
task_numa_free(current, false);
return retval;