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authorLinus Torvalds <torvalds@linux-foundation.org>2022-08-05 09:41:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-05 09:41:12 -0700
commit965a9d75e3d250088a269e0c903e86fe775b48c6 (patch)
treec274334291740246c3437cf1526d9fc5bfb6d4e8 /kernel/fork.c
parent29b1d469f3f6842ee4115f0b21f018fc44176468 (diff)
parentf1a15b977ff864513133ecb611eb28603d32c1b4 (diff)
downloadlinux-965a9d75e3d250088a269e0c903e86fe775b48c6.tar.bz2
Merge tag 'trace-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt: - Runtime verification infrastructure This is the biggest change here. It introduces the runtime verification that is necessary for running Linux on safety critical systems. It allows for deterministic automata models to be inserted into the kernel that will attach to tracepoints, where the information on these tracepoints will move the model from state to state. If a state is encountered that does not belong to the model, it will then activate a given reactor, that could just inform the user or even panic the kernel (for which safety critical systems will detect and can recover from). - Two monitor models are also added: Wakeup In Preemptive (WIP - not to be confused with "work in progress"), and Wakeup While Not Running (WWNR). - Added __vstring() helper to the TRACE_EVENT() macro to replace several vsnprintf() usages that were all doing it wrong. - eprobes now can have their event autogenerated when the event name is left off. - The rest is various cleanups and fixes. * tag 'trace-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (50 commits) rv: Unlock on error path in rv_unregister_reactor() tracing: Use alignof__(struct {type b;}) instead of offsetof() tracing/eprobe: Show syntax error logs in error_log file scripts/tracing: Fix typo 'the the' in comment tracepoints: It is CONFIG_TRACEPOINTS not CONFIG_TRACEPOINT tracing: Use free_trace_buffer() in allocate_trace_buffers() tracing: Use a struct alignof to determine trace event field alignment rv/reactor: Add the panic reactor rv/reactor: Add the printk reactor rv/monitor: Add the wwnr monitor rv/monitor: Add the wip monitor rv/monitor: Add the wip monitor skeleton created by dot2k Documentation/rv: Add deterministic automata instrumentation documentation Documentation/rv: Add deterministic automata monitor synthesis documentation tools/rv: Add dot2k Documentation/rv: Add deterministic automaton documentation tools/rv: Add dot2c Documentation/rv: Add a basic documentation rv/include: Add instrumentation helper functions rv/include: Add deterministic automata monitor definition via C macros ...
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 28772142022a..90c85b17bf69 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1965,6 +1965,18 @@ static void copy_oom_score_adj(u64 clone_flags, struct task_struct *tsk)
mutex_unlock(&oom_adj_mutex);
}
+#ifdef CONFIG_RV
+static void rv_task_fork(struct task_struct *p)
+{
+ int i;
+
+ for (i = 0; i < RV_PER_TASK_MONITORS; i++)
+ p->rv[i].da_mon.monitoring = false;
+}
+#else
+#define rv_task_fork(p) do {} while (0)
+#endif
+
/*
* This creates a new process as a copy of the old one,
* but does not actually start it yet.
@@ -2403,6 +2415,8 @@ static __latent_entropy struct task_struct *copy_process(
*/
copy_seccomp(p);
+ rv_task_fork(p);
+
rseq_fork(p, clone_flags);
/* Don't start children in a dying pid namespace */