Bugs item #1715392, was opened at 2007-05-09 03:34
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Category: client module
Group: crash
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Feng Tu (ayanamixp)
Assigned to: Daniel Stenberg (bagder)
Summary: TFTP catches float point exception with "--connect-timeout"

Initial Comment:
When the option "--connect-timeout" is followed by the number less than 5, Curl will catches float point exception.
You can type the command as followings:
$ curl tftp://%HOSTIP:%TFTPPORT/1.txt --connect-timeout 1
You will get an error like this:
Floating point exception

We find the reason causing this defect:
In function "tftp_set_timeouts" of the file "lib/tftp.c"

================================================
state->retry_max = timeout/5;
/* Compute the re-start interval to suit the timeout */
state->retry_time = timeout/state->retry_max;

================================================

When variant "timeout" is less than 5, we will get an arithmetic expression of which denominator is zero!!
Kenerl will send signal "SIGFPE" and terminate program.

I think we can solve this defect by adding
================================================
        state->retry_max = timeout/5;
+ if ( state->retry_max < 1 ){
+ state->retry_max = 1;
+ }

        /* Compute the re-start interval to suit the timeout */
        state->retry_time = timeout/state->retry_max;
================================================

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

You can respond by visiting:
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Received on 2007-05-09