James He created GUACAMOLE-441:
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Summary: guacd ssh plugin segfault when copy text to clipboard
Key: GUACAMOLE-441
URL: https://issues.apache.org/jira/browse/GUACAMOLE-441
Project: Guacamole
Issue Type: Bug
Components: SSH
Affects Versions: 0.9.13-incubating
Environment: GNU Linux x86_64
Reporter: James He
This segfault can be replicated each time when do the below steps.
- Login to any SSH server from guacamole.
- Try a command with much output e.g. "ps aux".
- Select the output text of the above command.
- SSH connection will be terminated immediately.
- Core dump of guacd will be generated.
{code:none}
Core was generated by `/sbin/guacd -f'.
Program terminated with signal SIGABRT, Aborted.
#0 0x00002aaaabca8437 in raise () from /lib64/libc.so.6
(gdb) bt
#0 0x00002aaaabca8437 in raise () from /lib64/libc.so.6
#1 0x00002aaaabca9818 in abort () from /lib64/libc.so.6
#2 0x00002aaaabce6574 in ?? () from /lib64/libc.so.6
#3 0x00002aaaabcebdae in ?? () from /lib64/libc.so.6
#4 0x00002aaaabcecab6 in ?? () from /lib64/libc.so.6
#5 0x00002aaaadb6b160 in __guac_terminal_send_mouse (term=0x2aaab401bf60,
user=0x2aaab0002920, x=703, y=921,
mask=0) at terminal.c:1715
#6 0x00002aaaadb6b2b5 in guac_terminal_send_mouse (term=0x2aaab401bf60,
user=0x2aaab0002920, x=703, y=921, mask=0)
at terminal.c:1753
#7 0x00002aaaadb5c532 in guac_ssh_user_mouse_handler (user=0x2aaab0002920,
x=703, y=921, mask=0) at input.c:41
#8 0x00002aaaaaf4dc2e in __guac_handle_mouse (user=0x2aaab0002920, argc=3,
argv=0x2aaab000adc0)
at user-handlers.c:134
#9 0x00002aaaaaf4d3ea in guac_user_handle_instruction (user=0x2aaab0002920,
opcode=0x2aaab0012b29 "mouse", argc=3,
argv=0x2aaab000adc0) at user.c:178
#10 0x00000000004055e7 in guacd_user_input_thread (data=0x2aaaaf353d20) at
user.c:127
#11 0x00002aaaab8521a4 in start_thread (arg=0x2aab0d029700) at
pthread_create.c:309
#12 0x00002aaaabd5965d in clone () from /lib64/libc.so.6
(gdb) frame 5
#5 0x00002aaaadb6b160 in __guac_terminal_send_mouse (term=0x2aaab401bf60,
user=0x2aaab0002920, x=703, y=921,
mask=0) at terminal.c:1715
warning: Source file is more recent than executable.
1715 guac_common_clipboard_reset(term->clipboard, "text/plain");
(gdb) p term->clipboard->length
$6 = 9500
{code}
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