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Fix validation of overly-long IPv6 addresses.

The inet/cidr types sometimes failed to reject IPv6 inputs with too manycolon-separated fields, instead translating them to '::/0'. This is theresult of a thinko in the original ISC code that seems to be as yetunreported elsewhere. Per bug #14198 from Stefan Kaltenbrunner.Report: <20160616182222.5798.959@wrigleys.postgresql.org>

1 parent29987b2 commit519445bCopy full SHA for 519445b

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src/backend/utils/adt
- inet_net_pton.c

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`‎src/backend/utils/adt/inet_net_pton.c‎`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -496,7 +496,7 @@ inet_cidr_pton_ipv6(const char src, u_char dst, size_t size)`
`496`	`496`	`elseif (*src=='\0')`
`497`	`497`	`gotoenoent;`
`498`	`498`	`if (tp+NS_INT16SZ>endp)`
`499`		`-return (0);`
	`499`	`+gotoenoent;`
`500`	`500`	`*tp++= (u_char) (val >>8)&0xff;`
`501`	`501`	`*tp++= (u_char)val&0xff;`
`502`	`502`	`saw_xdigit=0;`

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Commit519445b

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`‎src/backend/utils/adt/inet_net_pton.c‎`

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