[PATCH 15/38] trace-cmd lib: check the return value of do_lssek() in trace_get_options()

Check that do_lseek doesn't fail before calling malloc() with a -1
argument.

This is flagged as an overrun error (CWE-119) by static anaysis
because of the call to read() later, but I don't imagine that malloc
would succeed.

Signed-off-by: Jerome Marchand <[email protected]>
---
 lib/trace-cmd/trace-output.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c
index 5ba0a145..35904620 100644
--- a/lib/trace-cmd/trace-output.c
+++ b/lib/trace-cmd/trace-output.c
@@ -2069,6 +2069,8 @@ __hidden void *trace_get_options(struct tracecmd_output *handle, size_t *len)
 	}
 
 	offset = do_lseek(&out_handle, 0, SEEK_CUR);
+	if(offset == (off_t)-1)
+		goto out;
 	buf = malloc(offset);
 	if (!buf)
 		goto out;
-- 
2.44.0