Messages in this thread Patch in this message | | | From | Masami Hiramatsu <> | Subject | [PATCH 2/3] tracing/boot: Fix to check the histogram control param is a leaf node | Date | Thu, 9 Sep 2021 22:12:18 +0900 |
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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().
Fixes: e66ed86ca6c5 ("tracing/boot: Add per-event histogram action options") Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> --- kernel/trace/trace_boot.c | 6 +++--- 1 file 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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