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| author | Florian Westphal <fw@strlen.de> | 2017-07-23 19:54:47 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-24 16:27:08 -0700 |
| commit | a28b1b90de8322ecc45d58f1c08da12197dad17f (patch) | |
| tree | 49bc180709a0af274935ef2216ed0041fe04e579 /scripts/patch-kernel | |
| parent | liquidio: fix implicit irq include causing build failures (diff) | |
| download | linux-a28b1b90de8322ecc45d58f1c08da12197dad17f.tar.gz linux-a28b1b90de8322ecc45d58f1c08da12197dad17f.zip | |
skbuff: re-add check for NULL skb->head in kfree_skb path
A null check is needed after all. netlink skbs can have skb->head be
backed by vmalloc. The netlink destructor vfree()s head, then sets it to
NULL. We then panic in skb_release_data with a NULL dereference.
Re-add such a test.
Alternative would be to switch to kvfree to free skb->head memory
and remove the special handling in netlink destructor.
Reported-by: kernel test robot <fengguang.wu@intel.com>
Fixes: 06dc75ab06943 ("net: Revert "net: add function to allocate sk_buff head without data area")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions