Bug 1311164 - xfreerdp randomly segfaults in xf_gdi_memblt
xfreerdp randomly segfaults in xf_gdi_memblt
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: freerdp (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
: rc
: ---
Assigned To: Ondrej Holy
Desktop QE
Depends On:
Blocks: 1311171
  Show dependency treegraph
Reported: 2016-02-23 09:33 EST by Ondrej Holy
Modified: 2016-11-03 21:48 EDT (History)
2 users (show)

See Also:
Fixed In Version: freerdp-1.0.2-9.el7
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1311171 (view as bug list)
Last Closed: 2016-11-03 21:48:02 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Ondrej Holy 2016-02-23 09:33:14 EST
Description of problem:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffecae9700 (LWP 28342)]
0x0000000000408552 in xf_gdi_memblt (context=0x6c5b60, memblt=0x6b2d38) at FreeRDP/client/X11/xf_gdi.c:602
602		XCopyArea(xfi->display, bitmap->pixmap, xfi->drawing, xfi->gc,

#0  0x0000000000408552 in xf_gdi_memblt (context=0x6c5b60, memblt=0x6b2d38) at FreeRDP/client/X11/xf_gdi.c:602
#1  0x00007ffff68369ad in update_gdi_memblt (context=0x6c5b60, memblt=0x6b2d38) at libfreerdp-cache/bitmap.c:37
#2  0x00007ffff65fb189 in update_recv_primary_order (update=0x6b06b0, s=0x7fffe802cd10, flags=65 'A') at FreeRDP/libfreerdp-core/orders.c:1781
#3  0x00007ffff65fbef3 in update_recv_order (update=0x6b06b0, s=0x7fffe802cd10) at FreeRDP/libfreerdp-core/orders.c:2018
#4  0x00007ffff660bc44 in fastpath_recv_orders (fastpath=0x6b48f0, s=0x7fffe802cd10) at FreeRDP/libfreerdp-core/fastpath.c:132
#5  0x00007ffff660be20 in fastpath_recv_update (fastpath=0x6b48f0, updateCode=0 '\000', size=614, s=0x7fffe802cd10)
    at /home/oholy/Downloads/FreeRDP/libfreerdp-core/fastpath.c:173
#6  0x00007ffff660c34b in fastpath_recv_update_data (fastpath=0x6b48f0, s=0x7fffe802cd10) at FreeRDP/libfreerdp-core/fastpath.c:294
#7  0x00007ffff660c3d1 in fastpath_recv_updates (fastpath=0x6b48f0, s=0x7fffe802cd10) at FreeRDP/libfreerdp-core/fastpath.c:310
#8  0x00007ffff66094a6 in rdp_recv_fastpath_pdu (rdp=0x6a2200, s=0x7fffe802cd10) at FreeRDP/libfreerdp-core/rdp.c:763
#9  0x00007ffff66094f0 in rdp_recv_pdu (rdp=0x6a2200, s=0x7fffe802cd10) at FreeRDP/libfreerdp-core/rdp.c:771
#10 0x00007ffff66096a3 in rdp_recv_callback (transport=0x6a4080, s=0x7fffe802cd10, extra=0x6a2200) at FreeRDP/libfreerdp-core/rdp.c:831
#11 0x00007ffff660e6ab in transport_check_fds (ptransport=0x6a2250) at FreeRDP/libfreerdp-core/transport.c:359
#12 0x00007ffff660977f in rdp_check_fds (rdp=0x6a2200) at FreeRDP/libfreerdp-core/rdp.c:862
#13 0x00007ffff65fc263 in freerdp_check_fds (instance=0x6a2070) at FreeRDP/libfreerdp-core/freerdp.c:123
#14 0x0000000000414ac3 in xfreerdp_run (instance=0x6a2070) at FreeRDP/client/X11/xfreerdp.c:1054
#15 0x0000000000414c01 in thread_func (param=0x6c6830) at FreeRDP/client/X11/xfreerdp.c:1091
#16 0x00007ffff546860a in start_thread () from /lib64/libpthread.so.0
#17 0x00007ffff51a2a4d in clone () from /lib64/libc.so.6

How reproducible:

It happens randomly, usually immediately after xfreerdp window is shown. I saw this crashes only when connecting to Windows 2012, however according the upstream patch it is happening also for Windows XP at least. Any special cmd options aren't needed, however I see this more often (with less then 5 attempts) when connecting using rdp security without additional credentials...

Steps to Reproduce:
1. xfreerdp --sec rdp win2012server

Additional info:

It has been fixed upstream by the following commit:

The commit is easy backportable.

It seems that servers can ask for cached bitmaps that they haven't been defined. We can simply ignore such requests in order to fix this crashes.
Comment 2 Ondrej Holy 2016-02-23 09:57:35 EST
I forget to mention that --no-bmp-cache may be used as workaround.
Comment 3 Mike McCune 2016-03-28 19:14:23 EDT
This bug was accidentally moved from POST to MODIFIED via an error in automation, please see mmccune@redhat.com with any questions
Comment 5 Tomas Hudziec 2016-08-24 07:36:19 EDT
During executing command "xfreerdp --sec rdp <win2012serverIP>" 12 times the crash did not happen. Suppose it is fixed. Tested on RHEL 7.3 with kernel-3.10.0-493.el7.x86_64 and freerdp-1.0.2-10.el7.x86_64.
Comment 7 errata-xmlrpc 2016-11-03 21:48:02 EDT
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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