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authorVladislav Grishenko <themiron@yandex-team.ru>2021-12-29 14:30:32 +0500
committerDamjan Marion <dmarion@me.com>2022-03-23 18:27:15 +0000
commit49ebbf7048f4d5c0f0eae02e7a1810f66ab61f58 (patch)
treef95bd189910e41cbaaa3b8168c011454d87a44f9 /src/vlib
parent2973350c81a7592b9ff66547b8cd34e5e6c8ccf0 (diff)
vlib: mitigate outdated new cli session events
Possible races while concurrent additon to the new sessions vector in a one process and remove from it in an another need to be avoided. Let the vector be changed in the new session process function only. Also cli_file_pool element may be freed already at the new session event arrive timepoint, still causing unexpected cli banner for noninteracive cli sessions. Type: fix Fixes: 17a67218587d40541ff522c6a86f354720481fbb Signed-off-by: Vladislav Grishenko <themiron@yandex-team.ru> Change-Id: I022d16dd3aad9c9330834d35c58938f04b015b08
Diffstat (limited to 'src/vlib')
-rw-r--r--src/vlib/unix/cli.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/vlib/unix/cli.c b/src/vlib/unix/cli.c
index e6f549b776f..03baf3e58c1 100644
--- a/src/vlib/unix/cli.c
+++ b/src/vlib/unix/cli.c
@@ -1312,6 +1312,10 @@ unix_cli_new_session_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
/* Add an identifier to the new session list */
unix_cli_new_session_t ns;
+ /* Check the connection didn't close already */
+ if (pool_is_free_index (cm->cli_file_pool, event_data[0]))
+ break;
+
ns.cf_index = event_data[0];
ns.deadline = vlib_time_now (vm) + 1.0;
@@ -2693,7 +2697,7 @@ unix_cli_kill (unix_cli_main_t * cm, uword cli_file_index)
if (ns->cf_index == cli_file_index)
{
- vec_del1 (cm->new_sessions, i);
+ ns->cf_index = ~0;
break;
}
}