fm10k: fix incorrect free on skb in ts_tx_enqueue

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This patch resolves a bug in the ts_tx_enqueue code responsible for a
NULL pointer dereference and invalid access of the skb list. We
incorrectly freed the actual skb we found instead of our copy. Thus the
skb queue is essentially invalidated. Resolve this by freeing our clone
in the cases where we did not add it to the queue. This also avoids the
skb memory leak caused by failure to free the clone.

[  589.719320] BUG: unable to handle kernel NULL pointer dereference at           (null)
[  589.722344] IP: [<ffffffffa0310e60>] fm10k_ts_tx_subtask+0xb0/0x160 [fm10k]
[  589.723796] PGD 0
[  589.725228] Oops: 0000 [#1] SMP

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

...

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Jacob Keller 2015-06-03 16:31:01 -07:00 • committed by Jeff Kirsher

parent e075996ebd

commit c23544b196

1 changed files with 1 additions and 1 deletions

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drivers/net/ethernet/intel/fm10k/fm10k_ptp.c

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