Change in osmo-msc[master]: libmsc: Make sure to not dereference a NULL trans

[Vadim Yanitskiy]

Vadim Yanitskiy has posted comments on this change. ( https://gerrit.osmocom.org/13963 )

Change subject: libmsc: Make sure to not dereference a NULL trans
......................................................................


Patch Set 1:

(2 comments)

https://gerrit.osmocom.org/#/c/13963/1/src/libmsc/gsm_04_08_cc.c
File src/libmsc/gsm_04_08_cc.c:

https://gerrit.osmocom.org/#/c/13963/1/src/libmsc/gsm_04_08_cc.c@1891
PS1, Line 1891: LOG_TRANS_CAT
Alternatively, we can make LOG_TRANS() macro NULL-safe:

  #define LOG_TRANS(trans, level, fmt, args...) do { \
    if ((trans) != NULL) \
      LOG_TRANS_CAT(trans, (trans)->log_subsys, level, fmt, ##args) \
    else \
      LOGP(DMSC, level, fmt, args...); \
  } while (0);

or less elegant:

  #define LOG_TRANS(trans, level, fmt, args...) \
    LOG_TRANS_CAT(trans, (trans) ? (trans)->log_subsys : DMSC, level, fmt, ##args)


https://gerrit.osmocom.org/#/c/13963/1/src/libmsc/transaction.c
File src/libmsc/transaction.c:

https://gerrit.osmocom.org/#/c/13963/1/src/libmsc/transaction.c@134
PS1, Line 134: LOG_TRANS_CAT(trans, DMSC, LOGL_ERROR
Please see: https://gerrit.osmocom.org/#/c/osmo-msc/+/13974/



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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ia14bd28e1db570c487ad8e90e29a69208e2226f2
Gerrit-Change-Number: 13963
Gerrit-PatchSet: 1
Gerrit-Owner: tnt <tnt at 246tNt.com>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-Reviewer: tnt <tnt at 246tNt.com>
Gerrit-CC: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Comment-Date: Fri, 10 May 2019 20:22:42 +0000
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