diff options
| author |   Benoît Ganne <bganne@cisco.com> | 2019-07-08 14:39:02 +0200 |
|---|---|---|
| committer |   Ole Trøan <otroan@employees.org> | 2019-07-22 10:11:32 +0000 |
| commit | f7c30df4bbeace3917164b249724d8cf0d8a6fec (patch) | |
| tree | d13a8f21909d1544c15b73c2e311a68430be3d0f /src/vlib/error.c | |
| parent | 1f50bf8fc57ebf78f9056185a342493be460a847 (diff) | |
stats: fix use-after-free hash key string
Hash keys are not copied by the hash infrastructure, instead the pointer
is used directly. stat_segment_register_gauge() does not allocate a
private object for the key, causing issues when it is freed or reused.
Allocate a private object on insertion into the hashtable instead.
Type: fix
Fixes: 92e3082199d10add866894e86a9762d79a3536c4
Change-Id: Ifb6addfcaec81bdb7ea3512050ce55f06ef09a4c
Signed-off-by: Benoît Ganne <bganne@cisco.com>
Diffstat (limited to 'src/vlib/error.c')
| -rw-r--r-- | src/vlib/error.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/vlib/error.c b/src/vlib/error.c index ef506635ad9..58e13431d9f 100644 --- a/src/vlib/error.c +++ b/src/vlib/error.c @@ -160,15 +160,18 @@ vlib_register_errors (vlib_main_t * vm, /* Register counter indices in the stat segment directory */ { int i; - u8 *error_name; + u8 *error_name = 0; for (i = 0; i < n_errors; i++) { - error_name = format (0, "/err/%v/%s%c", n->name, error_strings[i], 0); - /* Note: error_name consumed by the following call */ + vec_reset_length (error_name); + error_name = + format (error_name, "/err/%v/%s%c", n->name, error_strings[i], 0); vlib_stats_register_error_index (oldheap, error_name, em->counters, n->error_heap_index + i); } + + vec_free (error_name); } /* (re)register the em->counters base address, switch back to main heap */ |