[PATCH] SGSN: set pctx->lib = NULL after calling pdp_freepdp(pctx->lib)

If we don't do this, we will generate a bogus warning in gprs_sgsn:sgsn_pdp_ctx_free() when we release a pctx which still has the lib pointer set to non-NULL. At the same point, we introduce an OSMO_ASSERT() to verify that the pctx->lib really equals the pdp context which libgtp reported to us. --- openbsc/src/gprs/sgsn_libgtp.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c index f2eb35d..c244e2c 100644 --- a/openbsc/src/gprs/sgsn_libgtp.c +++ b/openbsc/src/gprs/sgsn_libgtp.c @@ -264,6 +264,10 @@ static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) DEBUGP(DGPRS, "Received CREATE PDP CTX CONF, cause=%d(%s)\n", cause, get_value_string(gtp_cause_strs, cause)); + /* make sure that libgtp doesn't call us with inconsistent + * pointers */ + OSMO_ASSERT(pctx->lib == pdp); + /* Check for cause value if it was really successful */ if (cause < 0) { LOGP(DGPRS, LOGL_NOTICE, "Create PDP ctx req timed out\n"); @@ -292,8 +296,13 @@ static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) reject: pctx->state = PDP_STATE_NONE; - if (pdp) + if (pdp) { pdp_freepdp(pdp); + /* unlink the now non-existing library handle from the + * pdp context */ + pctx->lib = NULL; + } + /* Send PDP CTX ACT REJ to MS */ rc = gsm48_tx_gsm_act_pdp_rej(pctx->mm, pctx->ti, reject_cause, 0, NULL); -- 1.8.3.2 -- - Harald Welte &lt;laforge(a)gnumonks.org&gt; http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)