net: inet: do not leave a dangling sk pointer in inet_create()

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[ Upstream commit 9365fa510c ]

sock_init_data() attaches the allocated sk object to the provided sock
object. If inet_create() fails later, the sk object is freed, but the
sock object retains the dangling pointer, which may create use-after-free
later.

Clear the sk pointer in the sock object on error.

Signed-off-by: Ignat Korchagin <ignat@cloudflare.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20241014153808.51894-7-ignat@cloudflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Ignat Korchagin 2024-10-14 16:38:05 +01:00 • committed by Greg Kroah-Hartman

parent 2b46994a6e

commit 3e8258070b

1 changed files with 10 additions and 12 deletions

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net/ipv4/af_inet.c

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