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- Log -----------------------------------------------------------------
http://cgit.osmocom.org/openbsc/commit/?id=74b2028167ddf04a867ae9f269bfa3435c93f252
commit 74b2028167ddf04a867ae9f269bfa3435c93f252
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Nov 10 08:30:31 2014 +0100
bsc: Fix use-after-free on OML NM messages from the BTS
Currently the sign_link pointer is dereferenced after a call to
osmo_signal_dispatch, which can indirectly call
e1inp_sign_link_destroy. If that happens, accessing *sign_link is
illegal and can lead to a segmentation violation.
Since only the bts pointer is needed from sign_link after the call to
osmo_signal_dispatch, this patch changes abis_nm_rcvmsg_fom to save
that pointer to a local variable earlier.
Addresses:
<0019> input/ipa.c:250 accept()ed new link from 192.168.1.101 to port 3002
SET ATTR NACK CAUSE=Message cannot be performed
<0005> bsc_init.c:52 Got a NACK going to drop the OML links.
<001b> bsc_init.c:319 Lost some E1 TEI link: 1 0xb351a830
=================================================================
==13198== ERROR: AddressSanitizer: heap-use-after-free on address 0xb5d1bc70 at pc 0x80a6e3d bp 0xbfbb33d8 sp 0xbfbb33cc
Sponsored-by: On-Waves ehf
-----------------------------------------------------------------------
Summary of changes:
openbsc/src/libbsc/abis_nm.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
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