On Tue, Nov 24, 2015 at 05:11:02PM +0100, Bram Moolenaar wrote: > Dominique wrote: > > > afl-fuzz fuzzer came up with the following command, > > which causes access to uninitialized memory in > > Vim-7-4-909: > > > > $ valgrind --track-origins=yes 2> valgrind.log \ > > vim -u NONE -c 'syn keyword x nextgroup=\(\1\)' > > > > In valgrind.log: > > > > ==4366== Memcheck, a memory error detector > > ==4366== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al. > > ==4366== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright > > info > > ==4366== Command: ./vim -u NONE -c syn\ keyword\ x\ nextgroup=\\(\\1\\) > > ==4366== > > ==4366== Conditional jump or move depends on uninitialised value(s) > > ==4366== at 0x55246B: match_backref (regexp_nfa.c:4882) > > ==4366== by 0x555276: nfa_regmatch (regexp_nfa.c:6398) > > ==4366== by 0x556214: nfa_regtry (regexp_nfa.c:6894) > > ==4366== by 0x5569DF: nfa_regexec_both (regexp_nfa.c:7085) > > ==4366== by 0x556D6A: nfa_regexec_nl (regexp_nfa.c:7247) > > ==4366== by 0x55702D: vim_regexec_both (regexp.c:8179) > > ==4366== by 0x5571BD: vim_regexec (regexp.c:8238) > > ==4366== by 0x5A90B8: get_id_list (syntax.c:6027) > > ==4366== by 0x5A5C2F: get_syn_options (syntax.c:4602) > > ==4366== by 0x5A63C4: syn_cmd_keyword (syntax.c:4840) > > ==4366== by 0x5A97B3: ex_syntax (syntax.c:6296) > > ==4366== by 0x46E052: do_one_cmd (ex_docmd.c:2961) > > ==4366== Uninitialised value was created by a heap allocation > > ==4366== at 0x4C2AB80: malloc (in > > /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) > > ==4366== by 0x4E27E3: lalloc (misc2.c:921) > > ==4366== by 0x5530D0: nfa_regmatch (regexp_nfa.c:5474) > > ==4366== by 0x556214: nfa_regtry (regexp_nfa.c:6894) > > ==4366== by 0x5569DF: nfa_regexec_both (regexp_nfa.c:7085) > > ==4366== by 0x556D6A: nfa_regexec_nl (regexp_nfa.c:7247) > > ==4366== by 0x55702D: vim_regexec_both (regexp.c:8179) > > ==4366== by 0x5571BD: vim_regexec (regexp.c:8238) > > ==4366== by 0x5A90B8: get_id_list (syntax.c:6027) > > ==4366== by 0x5A5C2F: get_syn_options (syntax.c:4602) > > ==4366== by 0x5A63C4: syn_cmd_keyword (syntax.c:4840) > > ==4366== by 0x5A97B3: ex_syntax (syntax.c:6296) > > Is this fixed by patch 7.4.937, or is this another problem?
I can reproduce this with vim 7.4.941, so it must be a different
problem.
(Unsurprisingly, since \z(\) doesn't make an appearance.)
Marius Gedminas
--
(mental note: stop installing red hat. everytime i do so, it takes ages to fix
my system again.)
-- from the sig of Martin Högman
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