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net: appletalk: Fix device refcount leak in atrtr_create()

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[ Upstream commit 711c80f7d8 ]

When updating an existing route entry in atrtr_create(), the old device
reference was not being released before assigning the new device,
leading to a device refcount leak. Fix this by calling dev_put() to
release the old device reference before holding the new one.

Fixes: c7f905f0f6 ("[ATALK]: Add missing dev_hold() to atrtr_create().")
Signed-off-by: Kito Xu <veritas501@foxmail.com>
Link: https://patch.msgid.link/tencent_E1A26771CDAB389A0396D1681A90A49E5D09@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kito Xu 2025-07-09 03:52:51 +00:00 committed by Greg Kroah-Hartman
parent 12b00ec996
commit a7852b0179
1 changed files with 1 additions and 0 deletions
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net/appletalk/ddp.c
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@ -563,6 +563,7 @@ static int atrtr_create(struct rtentry *r, struct net_device *devhint)
/* Fill in the routing entry */
rt->target = ta->sat_addr;
dev_put(rt->dev); /* Release old device */
dev_hold(devhint);
rt->dev = devhint;
rt->flags = r->rt_flags;