fixeria has submitted this change. ( https://gerrit.osmocom.org/c/libosmocore/+/40222?usp=email ) Change subject: lapdm: Take talloc msgb ownership when enqueueing it ...................................................................... lapdm: Take talloc msgb ownership when enqueueing it Otherwise the msg talloc reference is kept parented at some unknown pointer in some unknown upper layer, which may cause memory corruption or use-after-free. Change-Id: Iba7b11bd9541c883588f34df67fdd865d72710d7 Related: OS#6728 (cherry picked from commit 9affae763e296d99eaefa0df59c4020146881bb8) --- M src/gsm/lapdm.c 1 file changed, 4 insertions(+), 0 deletions(-) Approvals: pespin: Looks good to me, approved Jenkins Builder: Verified diff --git a/src/gsm/lapdm.c b/src/gsm/lapdm.c index 1fc986d..3a0e29b 100644 --- a/src/gsm/lapdm.c +++ b/src/gsm/lapdm.c @@ -376,6 +376,8 @@ *msgb_push(msg, 1) = pad; *msgb_push(msg, 1) = link_id; *msgb_push(msg, 1) = chan_nr; + /* Take ownership of msg, since we are keeping it around in this layer: */ + talloc_steal(tall_lapd_ctx, msg); msgb_enqueue(&dl->dl.tx_queue, msg); return 0; } @@ -403,6 +405,8 @@ *msgb_push(msg, 1) = pad; *msgb_push(msg, 1) = link_id; *msgb_push(msg, 1) = chan_nr; + /* Take ownership of msg, since we are keeping it around in this layer: */ + talloc_steal(tall_lapd_ctx, msg); msgb_enqueue(&dl->tx_ui_queue, msg); return 0; } -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/40222?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings?usp=email Gerrit-MessageType: merged Gerrit-Project: libosmocore Gerrit-Branch: rel-1.11.1 Gerrit-Change-Id: Iba7b11bd9541c883588f34df67fdd865d72710d7 Gerrit-Change-Number: 40222 Gerrit-PatchSet: 1 Gerrit-Owner: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-Reviewer: pespin <pespin(a)sysmocom.de>