postgresql/src/backend/utils
Tom Lane 01824385ae Prevent potential overruns of fixed-size buffers.
Coverity identified a number of places in which it couldn't prove that a
string being copied into a fixed-size buffer would fit.  We believe that
most, perhaps all of these are in fact safe, or are copying data that is
coming from a trusted source so that any overrun is not really a security
issue.  Nonetheless it seems prudent to forestall any risk by using
strlcpy() and similar functions.

Fixes by Peter Eisentraut and Jozef Mlich based on Coverity reports.

In addition, fix a potential null-pointer-dereference crash in
contrib/chkpass.  The crypt(3) function is defined to return NULL on
failure, but chkpass.c didn't check for that before using the result.
The main practical case in which this could be an issue is if libc is
configured to refuse to execute unapproved hashing algorithms (e.g.,
"FIPS mode").  This ideally should've been a separate commit, but
since it touches code adjacent to one of the buffer overrun changes,
I included it in this commit to avoid last-minute merge issues.
This issue was reported by Honza Horak.

Security: CVE-2014-0065 for buffer overruns, CVE-2014-0066 for crypt()
2014-02-17 11:20:21 -05:00
..
adt Prevent potential overruns of fixed-size buffers. 2014-02-17 11:20:21 -05:00
cache In RelationClearRelation, postpone cache reload if !IsTransactionState(). 2014-02-06 19:38:06 -05:00
error Fix possible crashes due to using elog/ereport too early in startup. 2014-01-11 16:36:07 -05:00
fmgr Prevent privilege escalation in explicit calls to PL validators. 2014-02-17 09:33:31 -05:00
hash Update copyright for 2014 2014-01-07 16:05:30 -05:00
init Mark some more variables as static or include the appropriate header 2014-02-08 21:21:46 -05:00
mb Make various variables const (read-only). 2014-01-18 16:04:32 -05:00
misc Separate multixact freezing parameters from xid's 2014-02-13 19:36:31 -03:00
mmgr Allow use of "z" flag in our printf calls, and use it where appropriate. 2014-01-23 17:18:33 -05:00
resowner Update copyright for 2014 2014-01-07 16:05:30 -05:00
sort Update copyright for 2014 2014-01-07 16:05:30 -05:00
time Update copyright for 2014 2014-01-07 16:05:30 -05:00
.gitignore Avoid maintaining three separate copies of the error codes list. 2011-02-03 22:32:49 -05:00
errcodes.txt Update copyright for 2014 2014-01-07 16:05:30 -05:00
Gen_dummy_probes.sed Update copyright for 2014 2014-01-07 16:05:30 -05:00
Gen_fmgrtab.pl Update copyright for 2014 2014-01-07 16:05:30 -05:00
generate-errcodes.pl Update copyright for 2014 2014-01-07 16:05:30 -05:00
Makefile Make handling of errcodes.h more consistent with other generated headers. 2011-02-04 09:29:10 -05:00
probes.d Relax the requirement that all lwlocks be stored in a single array. 2014-01-27 11:07:44 -05:00