Date: Thu, 9 Mar 2017 03:20:20 +0000 (UTC) From: Kristof Provost <kp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r314940 - stable/10/sys/netpfil/pf Message-ID: <201703090320.v293KKBo012553@repo.freebsd.org>
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Author: kp Date: Thu Mar 9 03:20:20 2017 New Revision: 314940 URL: https://svnweb.freebsd.org/changeset/base/314940 Log: MFC r314810: pf: Fix a crash in low-memory situations If the call to pf_state_key_clone() in pf_get_translation() fails (i.e. there's no more memory for it) it frees skp. This is wrong, because skp is a pf_state_key **, so we need to free *skp, as is done later in the function. Getting it wrong means we try to free a stack variable of the calling pf_test_rule() function, and we panic. Modified: stable/10/sys/netpfil/pf/pf_lb.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/netpfil/pf/pf_lb.c ============================================================================== --- stable/10/sys/netpfil/pf/pf_lb.c Thu Mar 9 02:59:02 2017 (r314939) +++ stable/10/sys/netpfil/pf/pf_lb.c Thu Mar 9 03:20:20 2017 (r314940) @@ -550,7 +550,7 @@ pf_get_translation(struct pf_pdesc *pd, return (NULL); *nkp = pf_state_key_clone(*skp); if (*nkp == NULL) { - uma_zfree(V_pf_state_key_z, skp); + uma_zfree(V_pf_state_key_z, *skp); *skp = NULL; return (NULL); }
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