diff options
| author | Eric Dumazet <edumazet@google.com> | 2021-12-07 11:32:03 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-12-09 11:51:45 -0800 |
| commit | 4177e4960594f7e6ae2ae787667b1788178cf32c (patch) | |
| tree | 141e5833f6344cde8782b002a085184a8d91ae92 /net/ipv4/xfrm4_policy.c | |
| parent | 5092fb44ba11899a957d82284acad3ccaf8c7306 (diff) | |
xfrm: use net device refcount tracker helpers
xfrm4_fill_dst() and xfrm6_fill_dst() build dst,
getting a device reference that will likely be released
by standard dst_release() code.
We have to track these references or risk a warning if
CONFIG_NET_DEV_REFCNT_TRACKER=y
Note to XFRM maintainers :
Error path in xfrm6_fill_dst() releases the reference,
but does not clear xdst->u.dst.dev, so I wonder
if this could lead to double dev_put() in some cases,
where a dst_release() _is_ called by the callers in their
error path.
This extra dev_put() was added in commit 84c4a9dfbf430 ("xfrm6:
release dev before returning error")
Fixes: 9038c320001d ("net: dst: add net device refcount tracking to dst_entry")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Cong Wang <amwang@redhat.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Link: https://lore.kernel.org/r/20211207193203.2706158-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/xfrm4_policy.c')
| -rw-r--r-- | net/ipv4/xfrm4_policy.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c index 9ebd54752e03..9e83bcb6bc99 100644 --- a/net/ipv4/xfrm4_policy.c +++ b/net/ipv4/xfrm4_policy.c @@ -77,7 +77,7 @@ static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev, xdst->u.rt.rt_iif = fl4->flowi4_iif; xdst->u.dst.dev = dev; - dev_hold(dev); + dev_hold_track(dev, &xdst->u.dst.dev_tracker, GFP_ATOMIC); /* Sheit... I remember I did this right. Apparently, * it was magically lost, so this code needs audit */ |