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05 April 2024, 19:05:47 UTC
Revision a11a7f71cac209c7c9cca66eb506e1ebb033a3b3 authored by Marcus Huewe on 06 February 2017, 17:34:56 UTC, committed by David S. Miller on 08 February 2017, 16:54:40 UTC 
ipv6: addrconf: fix generation of new temporary addresses
 
Under some circumstances it is possible that no new temporary addresses
will be generated.

For instance, addrconf_prefix_rcv_add_addr() indirectly calls
ipv6_create_tempaddr(), which creates a tentative temporary address and
starts dad. Next, addrconf_prefix_rcv_add_addr() indirectly calls
addrconf_verify_rtnl(). Now, assume that the previously created temporary
address has the least preferred lifetime among all existing addresses and
is still tentative (that is, dad is still running). Hence, the next run of
addrconf_verify_rtnl() is performed when the preferred lifetime of the
temporary address ends. If dad succeeds before the next run, the temporary
address becomes deprecated during the next run, but no new temporary
address is generated.

In order to fix this, schedule the next addrconf_verify_rtnl() run slightly
before the temporary address becomes deprecated, if dad succeeded.

Signed-off-by: Marcus Huewe <suse-tux@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 926af62
History
Tip revision: a11a7f71cac209c7c9cca66eb506e1ebb033a3b3 authored by Marcus Huewe on 06 February 2017, 17:34:56 UTC
ipv6: addrconf: fix generation of new temporary addresses
Tip revision: a11a7f7
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.cocciconfig -rw-r--r-- 59 bytes
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.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.3 KB
.mailmap -rw-r--r-- 7.7 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 96.0 KB
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