[5.4.y,5.10.y,0/4] Backport of CVE-2024-44986 fix to stable 5.4 and 5.10

Message

Harshvardhan Jha Dec. 25, 2024, 5:16 a.m. UTC

Following is an attempt to backport fix of CVE-2024-44986 back to stable
5.4 and 5.10. 3 extra pre-requisite patches were required to introduce
the skb_expand_head() function and use it in ip6_finish_output2() for
the fix patch to be applicable.

Eric Dumazet (1):
  ipv6: fix possible UAF in ip6_finish_output2()

Vasily Averin (3):
  skbuff: introduce skb_expand_head()
  ipv6: use skb_expand_head in ip6_finish_output2
  ipv6: use skb_expand_head in ip6_xmit

 include/linux/skbuff.h |  1 +
 net/core/skbuff.c      | 42 ++++++++++++++++++++++
 net/ipv6/ip6_output.c  | 82 ++++++++++++++++--------------------------
 3 files changed, 74 insertions(+), 51 deletions(-)