4.9-stable patches

added patches:
	tcp-fix-over-estimation-in-sk_forced_mem_schedule.patch

diff --git a/queue-4.9/series b/queue-4.9/series
index 0176f8e7d71eb0f2a290ec0cf529fa6b1fad1e2d..acc4354fce63bcddbce8737b8cbbdbd72752956b 100644 (file)
--- a/queue-4.9/series
+++ b/queue-4.9/series
@@ -57,3 +57,4 @@ ext4-correct-max_inline_xattr_value_size-computing.patch
 dm-raid-fix-address-sanitizer-warning-in-raid_status.patch
 net_sched-cls_route-remove-from-list-when-handle-is-0.patch
 btrfs-reject-log-replay-if-there-is-unsupported-ro-compat-flag.patch
+tcp-fix-over-estimation-in-sk_forced_mem_schedule.patch

diff --git a/queue-4.9/tcp-fix-over-estimation-in-sk_forced_mem_schedule.patch b/queue-4.9/tcp-fix-over-estimation-in-sk_forced_mem_schedule.patch
new file mode 100644 (file)
index 0000000..8a77db3
--- /dev/null
+++ b/queue-4.9/tcp-fix-over-estimation-in-sk_forced_mem_schedule.patch
@@ -0,0 +1,45 @@
+From c4ee118561a0f74442439b7b5b486db1ac1ddfeb Mon Sep 17 00:00:00 2001
+From: Eric Dumazet <edumazet@google.com>
+Date: Tue, 14 Jun 2022 10:17:33 -0700
+Subject: tcp: fix over estimation in sk_forced_mem_schedule()
+
+From: Eric Dumazet <edumazet@google.com>
+
+commit c4ee118561a0f74442439b7b5b486db1ac1ddfeb upstream.
+
+sk_forced_mem_schedule() has a bug similar to ones fixed
+in commit 7c80b038d23e ("net: fix sk_wmem_schedule() and
+sk_rmem_schedule() errors")
+
+While this bug has little chance to trigger in old kernels,
+we need to fix it before the following patch.
+
+Fixes: d83769a580f1 ("tcp: fix possible deadlock in tcp_send_fin()")
+Signed-off-by: Eric Dumazet <edumazet@google.com>
+Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
+Reviewed-by: Shakeel Butt <shakeelb@google.com>
+Reviewed-by: Wei Wang <weiwan@google.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/ipv4/tcp_output.c |    7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+--- a/net/ipv4/tcp_output.c
++++ b/net/ipv4/tcp_output.c
+@@ -2986,11 +2986,12 @@ begin_fwd:
+  */
+ void sk_forced_mem_schedule(struct sock *sk, int size)
+ {
+-      int amt;
++      int delta, amt;
+ 
+-      if (size <= sk->sk_forward_alloc)
++      delta = size - sk->sk_forward_alloc;
++      if (delta <= 0)
+               return;
+-      amt = sk_mem_pages(size);
++      amt = sk_mem_pages(delta);
+       sk->sk_forward_alloc += amt * SK_MEM_QUANTUM;
+       sk_memory_allocated_add(sk, amt);
+