[PATCH v2 01/14] tools/rv: Fix substring match bug in monitor name search
STALE128d
LANDED
From: Gabriele Monaco <gmonaco@redhat.com>
Date: 2026-05-14 15:21:21
Also in:
lkml
Subsystem:
runtime verification (rv), the rest · Maintainers:
Steven Rostedt, Gabriele Monaco, Linus Torvalds
Revision v2 of 5 in this series; landed in mainline as a963fbf3166f on 2026-06-04.
Revisions (5)
__ikm_find_monitor_name() relies on strstr() to find a monitor by name, which fails if the target monitor is a substring of a previously listed monitor. Fix it by tokenizing the available_monitors file and matching full tokens instead. Signed-off-by: Gabriele Monaco <gmonaco@redhat.com> --- tools/verification/rv/src/in_kernel.c | 48 ++++++++++++++------------- 1 file changed, 25 insertions(+), 23 deletions(-)
diff --git a/tools/verification/rv/src/in_kernel.c b/tools/verification/rv/src/in_kernel.c
index 4bb746ea6e17..a200b63f4509 100644
--- a/tools/verification/rv/src/in_kernel.c
+++ b/tools/verification/rv/src/in_kernel.c@@ -58,38 +58,40 @@ static int __ikm_read_enable(char *monitor_name) */ static int __ikm_find_monitor_name(char *monitor_name, char *out_name) { - char *available_monitors, container[MAX_DA_NAME_LEN+1], *cursor, *end; - int retval = 1; + char *available_monitors, *cursor, *line; + int len = strlen(monitor_name); + int found = 0; available_monitors = tracefs_instance_file_read(NULL, "rv/available_monitors", NULL); if (!available_monitors) return -1; - cursor = strstr(available_monitors, monitor_name); - if (!cursor) { - retval = 0; - goto out_free; - } + config_is_container = 0; + cursor = available_monitors; + while ((line = strsep(&cursor, "\n"))) { + char *colon = strchr(line, ':'); - for (; cursor > available_monitors; cursor--) - if (*(cursor-1) == '\n') - break; - end = strstr(cursor, "\n"); - memcpy(out_name, cursor, end-cursor); - out_name[end-cursor] = '\0'; - - cursor = strstr(out_name, ":"); - if (cursor) - *cursor = '/'; - else { - sprintf(container, "%s:", monitor_name); - if (strstr(available_monitors, container)) - config_is_container = 1; + if (strcmp(line, monitor_name) && (!colon || strcmp(colon + 1, monitor_name))) + continue; + + strncpy(out_name, line, 2 * MAX_DA_NAME_LEN); + out_name[2 * MAX_DA_NAME_LEN - 1] = '\0'; + + if (colon) { + out_name[colon - line] = '/'; + } else { + /* If there are children, they are on the next line. */ + line = strsep(&cursor, "\n"); + if (line && !strncmp(line, monitor_name, len) && line[len] == ':') + config_is_container = 1; + } + + found = 1; + break; } -out_free: free(available_monitors); - return retval; + return found; } /*
--
2.54.0