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neighbour: fix nlmsg_pid in notifications

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neigh notifications today carry pid 0 for nlmsg_pid
in all cases. This patch fixes it to carry calling process
pid when available. Applications (eg. quagga) rely on
nlmsg_pid to ignore notifications generated by their own
netlink operations. This patch follows the routing subsystem
which already sets this correctly.

Reported-by: Vivek Venkatraman <[email protected]>
Signed-off-by: Roopa Prabhu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Roopa Prabhu 2017-03-19 22:01:28 -07:00 • committed by David S. Miller
commit 7b8f7a402d
5 changed files with 26 additions and 21 deletions
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4
net/atm/clip.c
View file

@ -106,7 +106,7 @@ static void unlink_clip_vcc(struct clip_vcc *clip_vcc)
entry->expires = jiffies - 1;
/* force resolution or expiration */
error = neigh_update(entry->neigh, NULL, NUD_NONE,
NEIGH_UPDATE_F_ADMIN);
NEIGH_UPDATE_F_ADMIN, 0);
if (error)
pr_crit("neigh_update failed with %d\n", error);
goto out;
@ -481,7 +481,7 @@ static int clip_setentry(struct atm_vcc *vcc, __be32 ip)
link_vcc(clip_vcc, entry);
}
error = neigh_update(neigh, llc_oui, NUD_PERMANENT,
NEIGH_UPDATE_F_OVERRIDE | NEIGH_UPDATE_F_ADMIN);
NEIGH_UPDATE_F_OVERRIDE | NEIGH_UPDATE_F_ADMIN, 0);
neigh_release(neigh);
return error;
}