svn commit: r314702 - stable/11/sys/netpfil/pf
Gleb Smirnoff
glebius at FreeBSD.org
Mon Mar 6 23:01:40 UTC 2017
Kristof,
this seems accidentially committed to stable branch. Please add it
to head.
And thanks a lot for the fix. Very likely this is my mistake back from 2012.
On Sun, Mar 05, 2017 at 01:14:18PM +0000, Kristof Provost wrote:
K> Author: kp
K> Date: Sun Mar 5 13:14:18 2017
K> New Revision: 314702
K> URL: https://svnweb.freebsd.org/changeset/base/314702
K>
K> Log:
K> pf: Fix a crash in low-memory situations
K>
K> If the call to pf_state_key_clone() in pf_get_translation() fails (i.e. there's
K> no more memory for it) it frees skp. This is wrong, because skp is a
K> pf_state_key **, so we need to free *skp, as is done later in the function.
K> Getting it wrong means we try to free a stack variable of the calling
K> pf_test_rule() function, and we panic.
K>
K> Modified:
K> stable/11/sys/netpfil/pf/pf_lb.c
K>
K> Modified: stable/11/sys/netpfil/pf/pf_lb.c
K> ==============================================================================
K> --- stable/11/sys/netpfil/pf/pf_lb.c Sun Mar 5 12:06:45 2017 (r314701)
K> +++ stable/11/sys/netpfil/pf/pf_lb.c Sun Mar 5 13:14:18 2017 (r314702)
K> @@ -553,7 +553,7 @@ pf_get_translation(struct pf_pdesc *pd,
K> return (NULL);
K> *nkp = pf_state_key_clone(*skp);
K> if (*nkp == NULL) {
K> - uma_zfree(V_pf_state_key_z, skp);
K> + uma_zfree(V_pf_state_key_z, *skp);
K> *skp = NULL;
K> return (NULL);
K> }
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--
Totus tuus, Glebius.
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