[lwip-commits] [SCM] lwIP - A Lightweight TCPIP stack branch, master, updated. c4d78e642206761d12dfa594f79afe2920756c4b

[Sylvain Rochet]

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- Log -----------------------------------------------------------------
commit c4d78e642206761d12dfa594f79afe2920756c4b
Author: Sylvain Rochet <address@hidden>
Date:   Wed Jan 20 21:12:37 2016 +0100

    PPP, PPPoL2TP, fix double free of L2TP pcb in pppol2tp_create error path
    
    ppp_free() calls the low level protocol destroy function, pppol2tp_destroy()
    here, which freed the l2tp pcb, followed by pppol2tp_create which also freed
    the pcb.
    
    Fixing it by reordering the L2TP init so we don't have to call ppp_free()
    anymore.
    
    Signed-off-by: Sylvain Rochet <address@hidden>

commit 52463fa25b568c16aebc07555fcdd8be1b1c4bfb
Author: Wayne Uroda <address@hidden>
Date:   Wed Jan 20 20:50:08 2016 +0100

    PPP, PPPoS, fix dereference of uninitialised pppos->in_head pointer
    
    When I create a new PPP connection, I am seeing a hardfault (segfault)
    coming from pbuf_free.
    
    I traced the problem to an invalid in_head field of the pppos_pcb structure.
    The field is invalid because the memory is never cleared to zero after the
    pppos_pcb structure is created in pppos_create().
    
    I was able to fix the issue by adding a memset after the memp_malloc call.
    
    Signed-off-by: Sylvain Rochet <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 src/netif/ppp/pppol2tp.c |   14 +++++++-------
 src/netif/ppp/pppos.c    |    1 +
 2 files changed, 8 insertions(+), 7 deletions(-)


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