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commit 7ffa7b095fbea0f7f52a4179402edb04249c60d0 Author: Jacob Erlbeck jerlbeck@sysmocom.de Date: Thu Apr 9 14:47:18 2015 +0200

nitb: Fix IMSI/IMEI buffer handling (Coverity)

Currently the handling of the buffers is not done consistently. Some code assumes that the whole buffer may be used to store the string while at other places, the last buffer byte is left untouched in the assumption that it contains a terminating NUL-character. The latter is the correct behaviour.

This commit changes to code to not touch the last byte in the buffers and to rely on the last byte being NUL. So the maximum IMSI/IMEI length is GSM_IMSI_LENGTH-1/GSM_IMEI_LENGTH-1.

For information: We assume that we allocate the structure with talloc_zero. This means we have NULed the entire imsi array and then only write sizeof - 1 characters to it. So the last byte remains NUL.

Fixes: Coverity CID 1206568, 1206567 Sponsored-by: On-Waves ehf

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Summary of changes: openbsc/src/libcommon/gsm_subscriber_base.c | 3 +-- openbsc/src/libmsc/db.c | 4 ++-- openbsc/src/osmo-bsc_nat/bsc_ussd.c | 2 +- 3 files changed, 4 insertions(+), 5 deletions(-)

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