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authorPau Espin Pedrol <pespin@sysmocom.de>2019-08-16 13:20:09 +0200
committerNeels Hofmeyr <neels@hofmeyr.de>2019-08-21 13:32:34 +0200
commit05ec2b3fc88ffc759f09d28ee28b266c0bea0189 (patch)
tree7010a41ae11c45dfc4a3683d2b34c44aa385345f /TODO-RELEASE
parentaab47afe58124981f7391a4df43821cf2f95725f (diff)
libgtp: Remove packets in tx queue belonging pdp being freedcccamp2019
Doing so should avoid the crash seen in OS#3956, where a message is received in osmo-sgsn gtp iface after having received a DeleteCtxAccept message where pdp and associated cbp is freed. As a result, when new confirmation arrives, it can still be matched against an old request and be sent to upper layers providing an already freed cbp. With this patch, since all queued messages belonging to that pdp are dropped, confirmation won't find a match and be discarded in libgtp. In order to be able to drop all req messages belonging to a pdp, a new list is added to pdp_t and qmsg_t are added to that list when inserted into the per-gsn req transmit queue. This way upon pdp free time it's simply a matter of iterating over that list to remove all messages. There's no need to do same for resp queue, and it'd be actually counter-productive, because it wouldn't be possible to detect and discard duplicates anymore after pdp ctx has been freed. Related: OS#3956 Change-Id: Id86d0b241454d3ad49c64c28087fd2710fa2d17a
Diffstat (limited to 'TODO-RELEASE')
-rw-r--r--TODO-RELEASE2
1 files changed, 2 insertions, 0 deletions
diff --git a/TODO-RELEASE b/TODO-RELEASE
index d0852fc..73e3189 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -7,3 +7,5 @@
# If any interfaces have been added since the last public release: c:r:a + 1.
# If any interfaces have been removed or changed since the last public release: c:r:0.
#library what description / commit summary line
+libgtp queue.h struct qmsg_t got a new field: entry
+libgtp pdp.h struct pdp_t got a new field: qmsg_list_req