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Fix a harmless off-by-one error in counting controller argument lengths

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Bugfix on 0.1.1.1-alpha; found by boboper.
This commit is contained in:
Nick Mathewson 2010-12-02 13:19:21 -05:00
parent 31b69027d3
commit ee8f451bf1
2 changed files with 7 additions and 1 deletions
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5
changes/bytecount Normal file
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@ -0,0 +1,5 @@
o Minor bugfixes
- Fix a off-by-one error in calculating some controller command argument
lengths. Fortunately, this is harmless, the controller code does
redundant NUL termination too. Found by boboper. Bugfix on
0.1.1.1-alpha.

3
src/or/control.c
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@ -2855,9 +2855,10 @@ connection_control_process_inbuf(control_connection_t *conn)
&& !TOR_ISSPACE(conn->incoming_cmd[cmd_len]))
++cmd_len;
data_len -= cmd_len;
conn->incoming_cmd[cmd_len]='\0';
args = conn->incoming_cmd+cmd_len+1;
tor_assert(data_len>(size_t)cmd_len);
data_len -= (cmd_len+1); /* skip the command and NUL we added after it */
while (*args == ' ' || *args == '\t') {
++args;
--data_len;