From 06452a412e5e89c62cd4917a457c5cfd43dc1ead Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 10 Apr 2026 19:08:54 -0300 Subject: perf header: Bump up the max number of command line args allowed We need to do some upper limit validation, bump up the arbitrary limit as per suggestion of Sashiko about command line wildcard expansion ending up with more than 32768 args. Link: https://sashiko.dev/#/patchset/20260408172846.96360-1-acme%40kernel.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim --- tools/perf/util/header.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index a2796b72adc4..22c44b6f0b09 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -2795,8 +2795,11 @@ process_event_desc(struct feat_fd *ff, void *data __maybe_unused) return 0; } -// Some reasonable arbitrary max for the number of command line arguments -#define MAX_CMDLINE_NR 32768 +/* + * Some arbitrary max for the number of command line arguments, + * Wildcards can expand and end up with tons of command line args. + */ +#define MAX_CMDLINE_NR 1048576 static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused) { -- cgit v1.2.3