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ipv6: lockless IPV6_ROUTER_ALERT_ISOLATE implementation

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Reads from np->rtalert_isolate are racy.

Move this flag to inet->inet_flags to fix data-races.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2023-09-12 16:02:10 +00:00
committed by David S. Miller
parent 3cccda8db2
commit 83cd5eb654
4 changed files with 9 additions and 11 deletions
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3
include/linux/ipv6.h
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@@ -246,11 +246,10 @@ struct ipv6_pinfo {
__u16 sndflow:1,
pmtudisc:3,
padding:1, /* 1 bit hole */
srcprefs:3, /* 001: prefer temporary address
srcprefs:3; /* 001: prefer temporary address
* 010: prefer public address
* 100: prefer care-of address
*/
rtalert_isolate:1;
__u8 min_hopcount;
__u8 tclass;
__be32 rcv_flowinfo;

1
include/net/inet_sock.h
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@@ -276,6 +276,7 @@ enum {
INET_FLAGS_DONTFRAG = 25,
INET_FLAGS_RECVERR6 = 26,
INET_FLAGS_REPFLOW = 27,
INET_FLAGS_RTALERT_ISOLATE = 28,
};
/* cmsg flags for inet */