#196: using libssh2_channel_read crushes
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Reporter:
www.google.com/accounts/o8/id?id=aitoawk50cbnsiuuqgylsi_oyi14_ymtafn1cjc |
Owner:
Type: defect
| Status: new
Priority: high
| Milestone: 1.2.7
Component: API
| Version: 1.2.7
Keywords:
| Blocks:
Blocked By:
|
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Core was generated by `/users/ahirsh/libssh2-1.2.7/example/.libs/lt-sftp
10.106.59.20'.
Program terminated with signal 11, Segmentation fault.
#0 _libssh2_transport_read (session=0xe7c7a88a) at transport.c:294
294 session->socket_block_directions &=
~LIBSSH2_SESSION_BLOCK_INBOUND;
while i was trying to use libssh2_channel_read in the proper way :
...
int rc;
int bytecount;
do
{
char buffer[0x4000];
cout<<"Before Block"<<endl;
rc = libssh2_channel_read( channel, buffer, sizeof(buffer) );
cout<<"After Block"<<endl;
if( rc > 0 )
{
int i;
bytecount += rc;
fprintf(stdout, "We read:\n");
for( i=0; i < rc; ++i )
fputc( buffer[i], stdout);
fprintf(stdout, "\n");
}
else
{
fprintf(stdout, "libssh2_channel_read returned %d\n", rc);
}
}while( rc > 0);
...
i encountered a crush with the below stack trace :
Core was generated by `/users/ahirsh/libssh2-1.2.7/example/.libs/lt-sftp
10.106.59.20'.
Program terminated with signal 11, Segmentation fault.
#0 _libssh2_transport_read (session=0xad8d6e50) at transport.c:294
294 session->socket_block_directions &=
~LIBSSH2_SESSION_BLOCK_INBOUND;
(gdb) bt
#0 _libssh2_transport_read (session=0xe7c7a88a) at transport.c:294
#1 0x00fc9658 in _libssh2_channel_read (channel=0xb6a00468, stream_id=0,
buf=0xb7565fc4 "", buflen=16384) at channel.c:1693
#2 0x00fc98fd in libssh2_channel_read_ex (channel=0xb6a00468,
stream_id=0, buf=0xb7565fc4 "", buflen=16384) at channel.c:1844
#3 0x0804bbcb in LibraryCheck (param=0x0) at sftp.c:382
#4 0x00be343b in start_thread () from /lib/libpthread.so.0
#5 0x00348fde in clone () from /lib/libc.so.6
(gdb) quit
--
Ticket URL: <http://trac.libssh2.org/ticket/196>
libssh2 <http://trac.libssh2.org/>
C library for writing portable SSH2 clients
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