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On Wed, 15 Jul 2015, 吴迪 wrote:
use our static analysis tools, I find some bugs (Null deference
pointer) for dovecot-2.2.18. Null deference pointer bugs often make
program crashes, Please confim them, Thanks!
Say, did you checked the code manually yourself, too? Automated checks are
hints, if at all.
1. dovecot-2.2.18/src/config/config-request.c 332
'setting_export_section_name(ctx->prefix, def, children[i], i);', pointer
'children' in line 202 assigned NULL and if branch 'case SET_DEFLIST_UNIQUE'
not execute, so pointer 'children' is always NULL. It load to a bug of null
deference pointer In line 332.
e.g.:
line 332 is passed only, if count > 0. count appears just a very few times
in this function, easily to be spotted and judged, that count == 0 always,
except in cases:
case SET_DEFLIST:
case SET_DEFLIST_UNIQUE:
here your tool also missed the 2nd case.
The same bugs also appeared in :
1. dovecot-2.2.18/src/lib-index/mail-index-fsck.c line 170 or 174,
pointer 'kw_rec ' mybe NULL.
2.dovecot-2.2.18/src/lib-storage/mail-search-args-simplify line 349,
pointer 'prev_arg' mybe NULL.
best wishes~
Amy
- --
Steffen Kaiser
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