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gitosis at osmocom.org gitosis at osmocom.orgThis is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "Osmocom BTS-side code (Abis, scheduling, ...)". The branch, master has been updated via 54be46949e93e07e9e57b706388ebb832e5fad0a (commit) from 98f3f700797dcbf4777210c8100af79e27ffa7f1 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- http://cgit.osmocom.org/osmo-bts/commit/?id=54be46949e93e07e9e57b706388ebb832e5fad0a commit 54be46949e93e07e9e57b706388ebb832e5fad0a Author: Pau Espin Pedrol <pespin at sysmocom.de> Date: Fri Feb 9 12:08:38 2018 +0100 l1sap: Validate incoming RTP payload, drop bw-efficient AMR A recurrent kernel crash in sysmobts (several kernel versions) corrupting kernel memory in random places has been investigated and reproduced by placing a call against an MSC sending RTP with bandwidth-efficient AMR payload to osmo-bts-sysmo. The osmo-bts-sysmo in turn sends the payload to the femtobts related kernel modules via a msgq, which most probably fail to handle correctly this bw-efficient AMR payload and corrupt the kernel memory. First approach was to drop the bw-efficient AMR payloads lower in the stack in sysmo specific code (l1if_tch_encode), but as there's no bts model in osmo-bts actually supporting bw-efficient AMR, let's drop it early in the incoming path for all models to avoid further problems. Related: SYS#4063 Change-Id: If0c9233c628c724de4ab74e58e3e2affac79e6d0 ----------------------------------------------------------------------- Summary of changes: src/common/l1sap.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) hooks/post-receive -- Osmocom BTS-side code (Abis, scheduling, ...)