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authorMasami Hiramatsu <mhiramat@kernel.org>2021-09-09 22:36:30 +0900
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-09-09 19:14:33 -0400
commit5f8895b27da2656e5e2be029acfb68c016f03326 (patch)
tree168d6ed46b581ef5ea8e4e1bc087c2000a992e0d /kernel/trace
parenta3928f877e7b153dbc243d6329b3777ac75b6004 (diff)
tracing/boot: Fix to check the histogram control param is a leaf node
Since xbc_node_find_child() doesn't ensure the returned node is a leaf node (key-value pair or do not have subkeys), use xbc_node_find_value to ensure the histogram control parameter is a leaf node in trace_boot_compose_hist_cmd(). Link: https://lkml.kernel.org/r/163119459059.161018.18341288218424528962.stgit@devnote2 Fixes: e66ed86ca6c5 ("tracing/boot: Add per-event histogram action options") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_boot.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index a6be48b24774..db6ee372dc6d 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -385,11 +385,11 @@ trace_boot_compose_hist_cmd(struct xbc_node *hnode, char *buf, size_t size)
}
/* Histogram control attributes (mutual exclusive) */
- if (xbc_node_find_child(hnode, "pause"))
+ if (xbc_node_find_value(hnode, "pause", NULL))
append_printf(&buf, end, ":pause");
- else if (xbc_node_find_child(hnode, "continue"))
+ else if (xbc_node_find_value(hnode, "continue", NULL))
append_printf(&buf, end, ":continue");
- else if (xbc_node_find_child(hnode, "clear"))
+ else if (xbc_node_find_value(hnode, "clear", NULL))
append_printf(&buf, end, ":clear");
/* Histogram handler and actions */

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