Commit-ID: deab6f55a2fe6fe044af61c9aad6a8e90cda6499
Gitweb: http://git.kernel.org/tip/deab6f55a2fe6fe044af61c9aad6a8e90cda6499
Author: Josef Bacik <jbacik@xxxxxx>
AuthorDate: Tue, 24 Mar 2015 09:57:49 -0400
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 24 Mar 2015 12:10:26 -0300
tools lib traceevent: Handle NULL comm name
It is possible that a pid has no associated comm attached to it, although it
can still be passed to pevent_register_comm().
But if comm is NULL, it will cause strdup() to segfault. To prevent this
from happening, if comm is NULL use the default "<...>" name for the
pid.
Signed-off-by: Josef Bacik <jbacik@xxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20150324135922.549965495@xxxxxxxxxxx
Link: http://lkml.kernel.org/p/1403799732-30308-1-git-send-email-jbacik@xxxxxx
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/lib/traceevent/event-parse.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 8e5e4f6..31d4e7d 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -304,7 +304,10 @@ int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
if (!item)
return -1;
- item->comm = strdup(comm);
+ if (comm)
+ item->comm = strdup(comm);
+ else
+ item->comm = strdup("<...>");
if (!item->comm) {
free(item);
return -1;
--
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