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inet: control sockets should not use current thread task_frag 

Because ICMP handlers run from softirq contexts,
they must not use current thread task_frag.

Previously, all sockets allocated by inet_ctl_sock_create()
would use the per-socket page fragment, with no chance of
recursion.

Fixes: 98123866fc ("Treewide: Stop corrupting socket's task_frag")
Reported-by: syzbot+bebc6f1acdf4cbb79b03@syzkaller.appspotmail.com
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Benjamin Coddington <bcodding@redhat.com>
Acked-by: Guillaume Nault <gnault@redhat.com>
Link: https://lore.kernel.org/r/20230103192736.454149-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2023-01-03 19:27:36 +00:00 committed by Jakub Kicinski
parent 2c02d41d71
commit 1ac8855744
1 changed files with 1 additions and 0 deletions
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1
net/ipv4/af_inet.c
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@ -1665,6 +1665,7 @@ int inet_ctl_sock_create(struct sock **sk, unsigned short family,
if (rc == 0) {
*sk = sock->sk;
(*sk)->sk_allocation = GFP_ATOMIC;
(*sk)->sk_use_task_frag = false;
/*
* Unhash it so that IP input processing does not even see it,
* we do not wish this socket to see incoming packets.