ice: fix metadata_dst refcount handling on representor teardown

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ice_eswitch_release_repr() uses metadata_dst_free() to release the
representor's metadata_dst.  metadata_dst_free() directly frees the
underlying memory without checking the dst_entry refcount.

When ice_eswitch_port_start_xmit() processes a packet, it takes a
reference via dst_hold() and attaches the metadata_dst to the skb.
If the representor is torn down while packets are still queued on
the lower device (e.g. in a qdisc), the metadata_dst is freed while
references are still held.

Use dst_release() instead, which correctly decrements the refcount
and only frees the object when all references are dropped.  The dst
subsystem already handles metadata_dst cleanup in dst_destroy() when
DST_METADATA is set.

Other drivers sharing this pattern (nfp, airoha, bnxt) already use
dst_release() for their metadata_dst lifecycle.

Fixes: f5396b8a66 ("ice: switchdev slow path")
Cc: stable@vger.kernel.org
Signed-off-by: Tristan Madani <tristan@talencesecurity.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://patch.msgid.link/20260928230429.495442-5-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Tristan Madani 2026-09-28 16:04:25 -07:00 • committed by Jakub Kicinski

parent 7a579dec84

commit 58858b8f14

1 changed files with 1 additions and 1 deletions

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drivers/net/ethernet/intel/ice/ice_eswitch.c

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