ip: Fix data-races around sysctl_ip_prot_sock.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Mon, 18 Jul 2022 17:26:42 +0000 (10:26 -0700)
committerDavid S. Miller <davem@davemloft.net>
Wed, 20 Jul 2022 09:14:49 +0000 (10:14 +0100)
commit9b55c20f83369dd54541d9ddbe3a018a8377f451
tree47fb5876d7c291eda26016d3711002bfb19f9bf4
parent8895a9c2ac76fb9d3922fed4fe092c8ec5e5cccc
ip: Fix data-races around sysctl_ip_prot_sock.

sysctl_ip_prot_sock is accessed concurrently, and there is always a chance
of data-race.  So, all readers and writers need some basic protection to
avoid load/store-tearing.

Fixes: 4548b683b781 ("Introduce a sysctl that modifies the value of PROT_SOCK.")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/ip.h
net/ipv4/sysctl_net_ipv4.c