[PATCH v9 13/18] eal: check tailq length

[Stephen Hemminger]

The tailq name should not be allowed to exceed limits.

Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
Acked-by: Bruce Richardson <bruce.richard...@intel.com>
---
 doc/guides/rel_notes/release_26_03.rst |  1 +
 lib/eal/common/eal_common_tailqs.c     | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/doc/guides/rel_notes/release_26_03.rst 
b/doc/guides/rel_notes/release_26_03.rst
index 91b1808455..d643206167 100644
--- a/doc/guides/rel_notes/release_26_03.rst
+++ b/doc/guides/rel_notes/release_26_03.rst
@@ -93,6 +93,7 @@ API Changes
   * lpm: name must be less than RTE_LPM_NAMESIZE.
   * hash: name parameter must be less than RTE_HASH_NAMESIZE.
   * efd: name must be less than RTE_EFD_NAMESIZE.
+  * tailq: name must be less than RTE_TAILQ_NAMESIZE.
 
 
 ABI Changes
diff --git a/lib/eal/common/eal_common_tailqs.c 
b/lib/eal/common/eal_common_tailqs.c
index 47080d75ac..c581f43b6f 100644
--- a/lib/eal/common/eal_common_tailqs.c
+++ b/lib/eal/common/eal_common_tailqs.c
@@ -8,6 +8,7 @@
 
 #include <rte_eal.h>
 #include <rte_eal_memconfig.h>
+#include <rte_errno.h>
 #include <rte_log.h>
 #include <rte_string_fns.h>
 
@@ -30,8 +31,10 @@ rte_eal_tailq_lookup(const char *name)
        unsigned i;
        struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 
-       if (name == NULL)
+       if (name == NULL) {
+               rte_errno = EINVAL;
                return NULL;
+       }
 
        for (i = 0; i < RTE_MAX_TAILQ; i++) {
                if (!strncmp(name, mcfg->tailq_head[i].name,
@@ -39,6 +42,7 @@ rte_eal_tailq_lookup(const char *name)
                        return &mcfg->tailq_head[i];
        }
 
+       rte_errno = ENOENT;
        return NULL;
 }
 
@@ -67,6 +71,12 @@ rte_eal_tailq_create(const char *name)
 {
        struct rte_tailq_head *head = NULL;
 
+       if (strlen(name) >= sizeof(head->name)) {
+               EAL_LOG(ERR, "tailq name '%s' is too long", name);
+               rte_errno = ENAMETOOLONG;
+               return NULL;
+       }
+
        if (!rte_eal_tailq_lookup(name) &&
            (rte_tailqs_count + 1 < RTE_MAX_TAILQ)) {
                struct rte_mem_config *mcfg;
@@ -115,6 +125,7 @@ rte_eal_tailq_register(struct rte_tailq_elem *t)
        if (rte_eal_tailq_local_register(t) < 0) {
                EAL_LOG(ERR,
                        "%s tailq is already registered", t->name);
+               rte_errno = EEXIST;
                goto error;
        }
 
-- 
2.51.0