[Ntop-dev] Double free at shutdown in latest ntop

[Robbert Kouprie]

Hi,

FYI,

Once in a few times I get a double free error from glibc with the latest 
ntop CVS (picked up this morning). This is RedHat Enterprise Linux AS 4.0 
with kernel 2.6.9-5.0.3.ELsmp and glibc 2.3.4-2 (both standard).

It happens when I do a shutdown from the webinterface, and from the log it 
seems to be located in the FREE_HOST routine.

This is ntop with virtual Netflow device.

Mar 29 14:30:53 ntop2 ntop[21809]:  [MSGID0538544] Shutdown request has 
been received
Mar 29 14:30:53 ntop2 ntop[21809]:  [MSGID8462800] CLEANUP: ntop caught 
signal 0
Mar 29 14:30:53 ntop2 ntop[21809]:  [MSGID8696238] CLEANUP: Cleaning up, 
set FLAG_NTOPSTATE_TERM
Mar 29 14:30:53 ntop2 ntop[21809]:  [MSGID8905482] SIGPIPE: Handled 
(ignored) 0 errors
Mar 29 14:30:53 ntop2 ntop[21809]:  [MSGID8844426] CLEANUP: Locking purge 
mutex (may block for a little while)
Mar 29 14:30:53 ntop2 ntop[21809]:  [MSGID8814988] CLEANUP: Locked purge 
mutex, continuing shutdown
Mar 29 14:30:53 ntop2 ntop[21809]:  [MSGID8638895] FREE_HOST: Start, 2 
device(s)
Mar 29 14:30:53 ntop2 ntop[21809]: *** glibc detected *** double free or 
corruption (out): 0xb3f2cbd0 ***

After which ntop dies.

Regards,
Robbert