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Fix off-by-one bug in bitncmp(): When comparing a number of bits divisible by

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8, bitncmp() may dereference a pointer one byte out of bounds.

Chris Mikkelson (bug #5101)
This commit is contained in:
Heikki Linnakangas
2009-10-08 04:46:21 +00:00
parent 822b0159cc
commit eab94d8182
1 changed files with 2 additions and 2 deletions
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4
src/backend/utils/adt/network.c
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@ -1,7 +1,7 @@
/* /*
* PostgreSQL type definitions for the INET and CIDR types. * PostgreSQL type definitions for the INET and CIDR types.
* *
* $PostgreSQL: pgsql/src/backend/utils/adt/network.c,v 1.74 2009/06/11 14:49:03 momjian Exp $ * $PostgreSQL: pgsql/src/backend/utils/adt/network.c,v 1.75 2009/10/08 04:46:21 heikki Exp $
* *
* Jon Postel RIP 16 Oct 1998 * Jon Postel RIP 16 Oct 1998
*/ */
@ -972,7 +972,7 @@ bitncmp(void *l, void *r, int n)
b = n / 8; b = n / 8;
x = memcmp(l, r, b); x = memcmp(l, r, b);
if (x) if (x || (n % 8) == 0)
return x; return x;
lb = ((const u_char *) l)[b]; lb = ((const u_char *) l)[b];