GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

inet: frags: annotate races around fqdir->dead and fqdir->high_thresh

Browse source 
Both fields can be read/written without synchronization,
add proper accessors and documentation.

Fixes: d5dd88794a ("inet: fix various use-after-free in defrags units")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2022-01-13 01:22:29 -08:00 • committed by David S. Miller
parent 3ba8c6258e
commit 91341fa000
4 changed files with 18 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/net/ipv6_frag.h
View file

@ -67,7 +67,8 @@ ip6frag_expire_frag_queue(struct net *net, struct frag_queue *fq)
struct sk_buff *head;
rcu_read_lock();
if (fq->q.fqdir->dead)
/* Paired with the WRITE_ONCE() in fqdir_pre_exit(). */
if (READ_ONCE(fq->q.fqdir->dead))
goto out_rcu_unlock;
spin_lock(&fq->q.lock);