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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 04:46:37 +00:00
parent 895a3fb658
commit c2c86e4881
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: pgsql/src/backend/utils/adt/network.c,v 1.72 2007/11/15 21:14:39 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/network.c,v 1.72.2.1 2009/10/08 04:46:37 heikki Exp $
*
* Jon Postel RIP 16 Oct 1998
*/
@@ -994,7 +994,7 @@ bitncmp(void *l, void *r, int n)
b = n / 8;
x = memcmp(l, r, b);
if (x)
if (x || (n % 8) == 0)
return x;
lb = ((const u_char *) l)[b];