On Jun 14, 2012, at 6:49 AM, Rajasekhar wrote:
> The rpm version we are using is 4.8 and platform is RHEL6 and the
> valgrind output is attached. This issue we are observing only we have
> two kernels already installed already on the machine and with one
> kernel the transaction going just fine .
>
>
This is where the problem is:
==21323== 1 errors in context 2 of 214:
==21323== Invalid read of size 8
==21323== at 0x33222177FA: findEntry (header.c:706)
==21323== by 0x3322219BB2: intGetTdEntry (header.c:1300)
==21323== by 0x33222175BA: headerGet (header.c:1337)
==21323== by 0x4C488E3: headerGetEntryWrapper (rc-rpmman.c:3302)
==21323== by 0x4C495E8: rc_rpmman_read_header (rc-rpmman.c:1882)
==21323== by 0x4C4C10D: rc_rpmman_query (rc-rpmman.c:2321)
==21323== by 0x4C4DEE6: rc_rpmman_transact (rc-rpmman.c:1333)
==21323== by 0x4033ED: ??? (in /opt/novell/zenworks/lib/zmd/transact)
==21323== by 0x4038E2: main (in /opt/novell/zenworks/lib/zmd/transact)
==21323== Address 0x507cf98 is 8 bytes inside a block of size 40 free'd
==21323== at 0x4A04D72: free (vg_replace_malloc.c:325)
==21323== by 0x3322618438: rfree (rpmmalloc.c:78)
==21323== by 0x332221DC83: miFreeHeader (rpmdb.c:1541)
==21323== by 0x332221E9AD: rpmdbNextIterator (rpmdb.c:2064)
==21323== by 0x4C4BC59: rc_rpmman_find_system_headers (rc-rpmman.c:713)
-----------------------------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
==21323== by 0x4C4C0C6: rc_rpmman_query (rc-rpmman.c:2312)
==21323== by 0x4C4DEE6: rc_rpmman_transact (rc-rpmman.c:1333)
==21323== by 0x4033ED: ??? (in /opt/novell/zenworks/lib/zmd/transact)
==21323== by 0x4038E2: main (in /opt/novell/zenworks/lib/zmd/transact)
The Header object returned from rpmdbNextIterator is refcounted data.
You are (likely, I can't see the code) using the header object outside the
scope of an iterator.
Make sure that you do something like
myheader = headerLink(h);
if you want to use a header outside of the scope of an iterator.
You walso need to release the reference somewhere
(void) headerFree(myheader);
or you WILL have a memory leak.
Note that all data retrieved through headerGet() implicitly relies
on the reference count of the underlying header: the pointers
to header tag data are all within the header object.
hth
73 de Jeff
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