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net: convert sock.sk_wmem_alloc from atomic_t to refcount_t

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refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
tirimbino
Reshetova, Elena 8 years ago committed by David S. Miller
parent 2638595afc
commit 14afee4b60
37 changed files with 74 additions and 85 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 12
      drivers/atm/fore200e.c
  2. 2
      drivers/atm/he.c
  3. 4
      drivers/atm/idt77252.c
  4. 2
      include/linux/atmdev.h
  5. 8
      include/net/sock.h
  6. 2
      net/atm/br2684.c
  7. 2
      net/atm/clip.c
  8. 10
      net/atm/common.c
  9. 4
      net/atm/lec.c
  10. 4
      net/atm/mpc.c
  11. 2
      net/atm/pppoatm.c
  12. 2
      net/atm/raw.c
  13. 2
      net/atm/signaling.c
  14. 2
      net/caif/caif_socket.c
  15. 2
      net/core/datagram.c
  16. 2
      net/core/skbuff.c
  17. 26
      net/core/sock.c
  18. 2
      net/ipv4/af_inet.c
  19. 2
      net/ipv4/esp4.c
  20. 6
      net/ipv4/ip_output.c
  21. 4
      net/ipv4/tcp.c
  22. 2
      net/ipv4/tcp_offload.c
  23. 15
      net/ipv4/tcp_output.c
  24. 2
      net/ipv6/esp6.c
  25. 4
      net/ipv6/ip6_output.c
  26. 2
      net/kcm/kcmproc.c
  27. 2
      net/key/af_key.c
  28. 2
      net/netlink/af_netlink.c
  29. 4
      net/packet/af_packet.c
  30. 2
      net/phonet/socket.c
  31. 2
      net/rds/tcp_send.c
  32. 4
      net/rxrpc/af_rxrpc.c
  33. 2
      net/sched/sch_atm.c
  34. 2
      net/sctp/output.c
  35. 2
      net/sctp/proc.c
  36. 4
      net/sctp/socket.c
  37. 6
      net/unix/af_unix.c

12
drivers/atm/fore200e.c
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@ -924,12 +924,7 @@ fore200e_tx_irq(struct fore200e* fore200e)
else { else {
dev_kfree_skb_any(entry->skb); dev_kfree_skb_any(entry->skb);
} }
#if 1
/* race fixed by the above incarnation mechanism, but... */
if (atomic_read(&sk_atm(vcc)->sk_wmem_alloc) < 0) {
atomic_set(&sk_atm(vcc)->sk_wmem_alloc, 0);
}
#endif
/* check error condition */ /* check error condition */
if (*entry->status & STATUS_ERROR) if (*entry->status & STATUS_ERROR)
atomic_inc(&vcc->stats->tx_err); atomic_inc(&vcc->stats->tx_err);
@ -1130,13 +1125,9 @@ fore200e_push_rpd(struct fore200e* fore200e, struct atm_vcc* vcc, struct rpd* rp
return -ENOMEM; return -ENOMEM;
} }
ASSERT(atomic_read(&sk_atm(vcc)->sk_wmem_alloc) >= 0);
vcc->push(vcc, skb); vcc->push(vcc, skb);
atomic_inc(&vcc->stats->rx); atomic_inc(&vcc->stats->rx);
ASSERT(atomic_read(&sk_atm(vcc)->sk_wmem_alloc) >= 0);
return 0; return 0;
} }
@ -1572,7 +1563,6 @@ fore200e_send(struct atm_vcc *vcc, struct sk_buff *skb)
unsigned long flags; unsigned long flags;
ASSERT(vcc); ASSERT(vcc);
ASSERT(atomic_read(&sk_atm(vcc)->sk_wmem_alloc) >= 0);
ASSERT(fore200e); ASSERT(fore200e);
ASSERT(fore200e_vcc); ASSERT(fore200e_vcc);

2
drivers/atm/he.c
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@ -2395,7 +2395,7 @@ he_close(struct atm_vcc *vcc)
* TBRQ, the host issues the close command to the adapter. * TBRQ, the host issues the close command to the adapter.
*/ */
while (((tx_inuse = atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) > 1) && while (((tx_inuse = refcount_read(&sk_atm(vcc)->sk_wmem_alloc)) > 1) &&
(retry < MAX_RETRY)) { (retry < MAX_RETRY)) {
msleep(sleep); msleep(sleep);
if (sleep < 250) if (sleep < 250)

4
drivers/atm/idt77252.c
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@ -724,7 +724,7 @@ push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
struct sock *sk = sk_atm(vcc); struct sock *sk = sk_atm(vcc);
vc->estimator->cells += (skb->len + 47) / 48; vc->estimator->cells += (skb->len + 47) / 48;
if (atomic_read(&sk->sk_wmem_alloc) > if (refcount_read(&sk->sk_wmem_alloc) >
(sk->sk_sndbuf >> 1)) { (sk->sk_sndbuf >> 1)) {
u32 cps = vc->estimator->maxcps; u32 cps = vc->estimator->maxcps;
@ -2009,7 +2009,7 @@ idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
atomic_inc(&vcc->stats->tx_err); atomic_inc(&vcc->stats->tx_err);
return -ENOMEM; return -ENOMEM;
} }
atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
skb_put_data(skb, cell, 52); skb_put_data(skb, cell, 52);

2
include/linux/atmdev.h
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@ -254,7 +254,7 @@ static inline void atm_return(struct atm_vcc *vcc,int truesize)
static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size) static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
{ {
return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) < return (size + refcount_read(&sk_atm(vcc)->sk_wmem_alloc)) <
sk_atm(vcc)->sk_sndbuf; sk_atm(vcc)->sk_sndbuf;
} }

8
include/net/sock.h
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@ -390,7 +390,7 @@ struct sock {
/* ===== cache line for TX ===== */ /* ===== cache line for TX ===== */
int sk_wmem_queued; int sk_wmem_queued;
atomic_t sk_wmem_alloc; refcount_t sk_wmem_alloc;
unsigned long sk_tsq_flags; unsigned long sk_tsq_flags;
struct sk_buff *sk_send_head; struct sk_buff *sk_send_head;
struct sk_buff_head sk_write_queue; struct sk_buff_head sk_write_queue;
@ -1911,7 +1911,7 @@ static inline int skb_copy_to_page_nocache(struct sock *sk, struct iov_iter *fro
*/ */
static inline int sk_wmem_alloc_get(const struct sock *sk) static inline int sk_wmem_alloc_get(const struct sock *sk)
{ {
return atomic_read(&sk->sk_wmem_alloc) - 1; return refcount_read(&sk->sk_wmem_alloc) - 1;
} }
/** /**
@ -2055,7 +2055,7 @@ static inline unsigned long sock_wspace(struct sock *sk)
int amt = 0; int amt = 0;
if (!(sk->sk_shutdown & SEND_SHUTDOWN)) { if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
amt = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); amt = sk->sk_sndbuf - refcount_read(&sk->sk_wmem_alloc);
if (amt < 0) if (amt < 0)
amt = 0; amt = 0;
} }
@ -2136,7 +2136,7 @@ bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag);
*/ */
static inline bool sock_writeable(const struct sock *sk) static inline bool sock_writeable(const struct sock *sk)
{ {
return atomic_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf >> 1); return refcount_read(&sk->sk_wmem_alloc) < (sk->sk_sndbuf >> 1);
} }
static inline gfp_t gfp_any(void) static inline gfp_t gfp_any(void)

2
net/atm/br2684.c
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@ -252,7 +252,7 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc; ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev); pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc); refcount_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
ATM_SKB(skb)->atm_options = atmvcc->atm_options; ATM_SKB(skb)->atm_options = atmvcc->atm_options;
dev->stats.tx_packets++; dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len; dev->stats.tx_bytes += skb->len;

2
net/atm/clip.c
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@ -381,7 +381,7 @@ static netdev_tx_t clip_start_xmit(struct sk_buff *skb,
memcpy(here, llc_oui, sizeof(llc_oui)); memcpy(here, llc_oui, sizeof(llc_oui));
((__be16 *) here)[3] = skb->protocol; ((__be16 *) here)[3] = skb->protocol;
} }
atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
ATM_SKB(skb)->atm_options = vcc->atm_options; ATM_SKB(skb)->atm_options = vcc->atm_options;
entry->vccs->last_use = jiffies; entry->vccs->last_use = jiffies;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, vcc, vcc->dev); pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, vcc, vcc->dev);

10
net/atm/common.c
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@ -80,9 +80,9 @@ static void vcc_sock_destruct(struct sock *sk)
printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n", printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n",
__func__, atomic_read(&sk->sk_rmem_alloc)); __func__, atomic_read(&sk->sk_rmem_alloc));
if (atomic_read(&sk->sk_wmem_alloc)) if (refcount_read(&sk->sk_wmem_alloc))
printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n", printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n",
__func__, atomic_read(&sk->sk_wmem_alloc)); __func__, refcount_read(&sk->sk_wmem_alloc));
} }
static void vcc_def_wakeup(struct sock *sk) static void vcc_def_wakeup(struct sock *sk)
@ -101,7 +101,7 @@ static inline int vcc_writable(struct sock *sk)
struct atm_vcc *vcc = atm_sk(sk); struct atm_vcc *vcc = atm_sk(sk);
return (vcc->qos.txtp.max_sdu + return (vcc->qos.txtp.max_sdu +
atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; refcount_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
} }
static void vcc_write_space(struct sock *sk) static void vcc_write_space(struct sock *sk)
@ -156,7 +156,7 @@ int vcc_create(struct net *net, struct socket *sock, int protocol, int family, i
memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc)); memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc));
memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc)); memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc));
vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
atomic_set(&sk->sk_wmem_alloc, 1); refcount_set(&sk->sk_wmem_alloc, 1);
atomic_set(&sk->sk_rmem_alloc, 0); atomic_set(&sk->sk_rmem_alloc, 0);
vcc->push = NULL; vcc->push = NULL;
vcc->pop = NULL; vcc->pop = NULL;
@ -630,7 +630,7 @@ int vcc_sendmsg(struct socket *sock, struct msghdr *m, size_t size)
goto out; goto out;
} }
pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize); pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
atomic_add(skb->truesize, &sk->sk_wmem_alloc); refcount_add(skb->truesize, &sk->sk_wmem_alloc);
skb->dev = NULL; /* for paths shared with net_device interfaces */ skb->dev = NULL; /* for paths shared with net_device interfaces */
ATM_SKB(skb)->atm_options = vcc->atm_options; ATM_SKB(skb)->atm_options = vcc->atm_options;

4
net/atm/lec.c
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@ -181,7 +181,7 @@ lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
ATM_SKB(skb)->vcc = vcc; ATM_SKB(skb)->vcc = vcc;
ATM_SKB(skb)->atm_options = vcc->atm_options; ATM_SKB(skb)->atm_options = vcc->atm_options;
atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
if (vcc->send(vcc, skb) < 0) { if (vcc->send(vcc, skb) < 0) {
dev->stats.tx_dropped++; dev->stats.tx_dropped++;
return; return;
@ -345,7 +345,7 @@ static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
int i; int i;
char *tmp; /* FIXME */ char *tmp; /* FIXME */
atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
mesg = (struct atmlec_msg *)skb->data; mesg = (struct atmlec_msg *)skb->data;
tmp = skb->data; tmp = skb->data;
tmp += sizeof(struct atmlec_msg); tmp += sizeof(struct atmlec_msg);

4
net/atm/mpc.c
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@ -555,7 +555,7 @@ static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc)
sizeof(struct llc_snap_hdr)); sizeof(struct llc_snap_hdr));
} }
atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); refcount_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc);
ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; ATM_SKB(skb)->atm_options = entry->shortcut->atm_options;
entry->shortcut->send(entry->shortcut, skb); entry->shortcut->send(entry->shortcut, skb);
entry->packets_fwded++; entry->packets_fwded++;
@ -911,7 +911,7 @@ static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb)
struct mpoa_client *mpc = find_mpc_by_vcc(vcc); struct mpoa_client *mpc = find_mpc_by_vcc(vcc);
struct k_message *mesg = (struct k_message *)skb->data; struct k_message *mesg = (struct k_message *)skb->data;
atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
if (mpc == NULL) { if (mpc == NULL) {
pr_info("no mpc found\n"); pr_info("no mpc found\n");

2
net/atm/pppoatm.c
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@ -350,7 +350,7 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
return 1; return 1;
} }
atomic_add(skb->truesize, &sk_atm(ATM_SKB(skb)->vcc)->sk_wmem_alloc); refcount_add(skb->truesize, &sk_atm(ATM_SKB(skb)->vcc)->sk_wmem_alloc);
ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options; ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options;
pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n",
skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev); skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev);

2
net/atm/raw.c
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@ -35,7 +35,7 @@ static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb)
pr_debug("(%d) %d -= %d\n", pr_debug("(%d) %d -= %d\n",
vcc->vci, sk_wmem_alloc_get(sk), skb->truesize); vcc->vci, sk_wmem_alloc_get(sk), skb->truesize);
atomic_sub(skb->truesize, &sk->sk_wmem_alloc); WARN_ON(refcount_sub_and_test(skb->truesize, &sk->sk_wmem_alloc));
dev_kfree_skb_any(skb); dev_kfree_skb_any(skb);
sk->sk_write_space(sk); sk->sk_write_space(sk);
} }

2
net/atm/signaling.c
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@ -67,7 +67,7 @@ static int sigd_send(struct atm_vcc *vcc, struct sk_buff *skb)
struct sock *sk; struct sock *sk;
msg = (struct atmsvc_msg *) skb->data; msg = (struct atmsvc_msg *) skb->data;
atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
vcc = *(struct atm_vcc **) &msg->vcc; vcc = *(struct atm_vcc **) &msg->vcc;
pr_debug("%d (0x%lx)\n", (int)msg->type, (unsigned long)vcc); pr_debug("%d (0x%lx)\n", (int)msg->type, (unsigned long)vcc);
sk = sk_atm(vcc); sk = sk_atm(vcc);

2
net/caif/caif_socket.c
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@ -1013,7 +1013,7 @@ static const struct proto_ops caif_stream_ops = {
static void caif_sock_destructor(struct sock *sk) static void caif_sock_destructor(struct sock *sk)
{ {
struct caifsock *cf_sk = container_of(sk, struct caifsock, sk); struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
caif_assert(!atomic_read(&sk->sk_wmem_alloc)); caif_assert(!refcount_read(&sk->sk_wmem_alloc));
caif_assert(sk_unhashed(sk)); caif_assert(sk_unhashed(sk));
caif_assert(!sk->sk_socket); caif_assert(!sk->sk_socket);
if (!sock_flag(sk, SOCK_DEAD)) { if (!sock_flag(sk, SOCK_DEAD)) {

2
net/core/datagram.c
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@ -614,7 +614,7 @@ int zerocopy_sg_from_iter(struct sk_buff *skb, struct iov_iter *from)
skb->data_len += copied; skb->data_len += copied;
skb->len += copied; skb->len += copied;
skb->truesize += truesize; skb->truesize += truesize;
atomic_add(truesize, &skb->sk->sk_wmem_alloc); refcount_add(truesize, &skb->sk->sk_wmem_alloc);
while (copied) { while (copied) {
int size = min_t(int, copied, PAGE_SIZE - start); int size = min_t(int, copied, PAGE_SIZE - start);
skb_fill_page_desc(skb, frag++, pages[n], start, size); skb_fill_page_desc(skb, frag++, pages[n], start, size);

2
net/core/skbuff.c
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@ -3024,7 +3024,7 @@ int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
get_page(pfrag->page); get_page(pfrag->page);
skb->truesize += copy; skb->truesize += copy;
atomic_add(copy, &sk->sk_wmem_alloc); refcount_add(copy, &sk->sk_wmem_alloc);
skb->len += copy; skb->len += copy;
skb->data_len += copy; skb->data_len += copy;
offset += copy; offset += copy;

26
net/core/sock.c
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@ -1528,7 +1528,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
if (likely(sk->sk_net_refcnt)) if (likely(sk->sk_net_refcnt))
get_net(net); get_net(net);
sock_net_set(sk, net); sock_net_set(sk, net);
atomic_set(&sk->sk_wmem_alloc, 1); refcount_set(&sk->sk_wmem_alloc, 1);
mem_cgroup_sk_alloc(sk); mem_cgroup_sk_alloc(sk);
cgroup_sk_alloc(&sk->sk_cgrp_data); cgroup_sk_alloc(&sk->sk_cgrp_data);
@ -1552,7 +1552,7 @@ static void __sk_destruct(struct rcu_head *head)
sk->sk_destruct(sk); sk->sk_destruct(sk);
filter = rcu_dereference_check(sk->sk_filter, filter = rcu_dereference_check(sk->sk_filter,
atomic_read(&sk->sk_wmem_alloc) == 0); refcount_read(&sk->sk_wmem_alloc) == 0);
if (filter) { if (filter) {
sk_filter_uncharge(sk, filter); sk_filter_uncharge(sk, filter);
RCU_INIT_POINTER(sk->sk_filter, NULL); RCU_INIT_POINTER(sk->sk_filter, NULL);
@ -1602,7 +1602,7 @@ void sk_free(struct sock *sk)
* some packets are still in some tx queue. * some packets are still in some tx queue.
* If not null, sock_wfree() will call __sk_free(sk) later * If not null, sock_wfree() will call __sk_free(sk) later
*/ */
if (atomic_dec_and_test(&sk->sk_wmem_alloc)) if (refcount_dec_and_test(&sk->sk_wmem_alloc))
__sk_free(sk); __sk_free(sk);
} }
EXPORT_SYMBOL(sk_free); EXPORT_SYMBOL(sk_free);
@ -1659,7 +1659,7 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
/* /*
* sk_wmem_alloc set to one (see sk_free() and sock_wfree()) * sk_wmem_alloc set to one (see sk_free() and sock_wfree())
*/ */
atomic_set(&newsk->sk_wmem_alloc, 1); refcount_set(&newsk->sk_wmem_alloc, 1);
atomic_set(&newsk->sk_omem_alloc, 0); atomic_set(&newsk->sk_omem_alloc, 0);
sk_init_common(newsk); sk_init_common(newsk);
@ -1787,7 +1787,7 @@ void sock_wfree(struct sk_buff *skb)
* Keep a reference on sk_wmem_alloc, this will be released * Keep a reference on sk_wmem_alloc, this will be released
* after sk_write_space() call * after sk_write_space() call
*/ */
atomic_sub(len - 1, &sk->sk_wmem_alloc); WARN_ON(refcount_sub_and_test(len - 1, &sk->sk_wmem_alloc));
sk->sk_write_space(sk); sk->sk_write_space(sk);
len = 1; len = 1;
} }
@ -1795,7 +1795,7 @@ void sock_wfree(struct sk_buff *skb)
* if sk_wmem_alloc reaches 0, we must finish what sk_free() * if sk_wmem_alloc reaches 0, we must finish what sk_free()
* could not do because of in-flight packets * could not do because of in-flight packets
*/ */
if (atomic_sub_and_test(len, &sk->sk_wmem_alloc)) if (refcount_sub_and_test(len, &sk->sk_wmem_alloc))
__sk_free(sk); __sk_free(sk);
} }
EXPORT_SYMBOL(sock_wfree); EXPORT_SYMBOL(sock_wfree);
@ -1807,7 +1807,7 @@ void __sock_wfree(struct sk_buff *skb)
{ {
struct sock *sk = skb->sk; struct sock *sk = skb->sk;
if (atomic_sub_and_test(skb->truesize, &sk->sk_wmem_alloc)) if (refcount_sub_and_test(skb->truesize, &sk->sk_wmem_alloc))
__sk_free(sk); __sk_free(sk);
} }
@ -1829,7 +1829,7 @@ void skb_set_owner_w(struct sk_buff *skb, struct sock *sk)
* is enough to guarantee sk_free() wont free this sock until * is enough to guarantee sk_free() wont free this sock until
* all in-flight packets are completed * all in-flight packets are completed
*/ */
atomic_add(skb->truesize, &sk->sk_wmem_alloc); refcount_add(skb->truesize, &sk->sk_wmem_alloc);
} }
EXPORT_SYMBOL(skb_set_owner_w); EXPORT_SYMBOL(skb_set_owner_w);
@ -1852,7 +1852,7 @@ void skb_orphan_partial(struct sk_buff *skb)
struct sock *sk = skb->sk; struct sock *sk = skb->sk;
if (atomic_inc_not_zero(&sk->sk_refcnt)) { if (atomic_inc_not_zero(&sk->sk_refcnt)) {
atomic_sub(skb->truesize, &sk->sk_wmem_alloc); WARN_ON(refcount_sub_and_test(skb->truesize, &sk->sk_wmem_alloc));
skb->destructor = sock_efree; skb->destructor = sock_efree;
} }
} else { } else {
@ -1912,7 +1912,7 @@ EXPORT_SYMBOL(sock_i_ino);
struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force, struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
gfp_t priority) gfp_t priority)
{ {
if (force || atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) { if (force || refcount_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) {
struct sk_buff *skb = alloc_skb(size, priority); struct sk_buff *skb = alloc_skb(size, priority);
if (skb) { if (skb) {
skb_set_owner_w(skb, sk); skb_set_owner_w(skb, sk);
@ -1987,7 +1987,7 @@ static long sock_wait_for_wmem(struct sock *sk, long timeo)
break; break;
set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) if (refcount_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf)
break; break;
if (sk->sk_shutdown & SEND_SHUTDOWN) if (sk->sk_shutdown & SEND_SHUTDOWN)
break; break;
@ -2310,7 +2310,7 @@ int __sk_mem_raise_allocated(struct sock *sk, int size, int amt, int kind)
if (sk->sk_type == SOCK_STREAM) { if (sk->sk_type == SOCK_STREAM) {
if (sk->sk_wmem_queued < prot->sysctl_wmem[0]) if (sk->sk_wmem_queued < prot->sysctl_wmem[0])
return 1; return 1;
} else if (atomic_read(&sk->sk_wmem_alloc) < } else if (refcount_read(&sk->sk_wmem_alloc) <
prot->sysctl_wmem[0]) prot->sysctl_wmem[0])
return 1; return 1;
} }
@ -2577,7 +2577,7 @@ static void sock_def_write_space(struct sock *sk)
/* Do not wake up a writer until he can make "significant" /* Do not wake up a writer until he can make "significant"
* progress. --DaveM * progress. --DaveM
*/ */
if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) { if ((refcount_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) {
wq = rcu_dereference(sk->sk_wq); wq = rcu_dereference(sk->sk_wq);
if (skwq_has_sleeper(wq)) if (skwq_has_sleeper(wq))
wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |

2
net/ipv4/af_inet.c
Unescape View File

@ -150,7 +150,7 @@ void inet_sock_destruct(struct sock *sk)
} }
WARN_ON(atomic_read(&sk->sk_rmem_alloc)); WARN_ON(atomic_read(&sk->sk_rmem_alloc));
WARN_ON(atomic_read(&sk->sk_wmem_alloc)); WARN_ON(refcount_read(&sk->sk_wmem_alloc));
WARN_ON(sk->sk_wmem_queued); WARN_ON(sk->sk_wmem_queued);
WARN_ON(sk->sk_forward_alloc); WARN_ON(sk->sk_forward_alloc);

2
net/ipv4/esp4.c
Unescape View File

@ -307,7 +307,7 @@ int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *
skb->data_len += tailen; skb->data_len += tailen;
skb->truesize += tailen; skb->truesize += tailen;
if (sk) if (sk)
atomic_add(tailen, &sk->sk_wmem_alloc); refcount_add(tailen, &sk->sk_wmem_alloc);
goto out; goto out;
} }

6
net/ipv4/ip_output.c
Unescape View File

@ -1037,7 +1037,7 @@ alloc_new_skb:
(flags & MSG_DONTWAIT), &err); (flags & MSG_DONTWAIT), &err);
} else { } else {
skb = NULL; skb = NULL;
if (atomic_read(&sk->sk_wmem_alloc) <= if (refcount_read(&sk->sk_wmem_alloc) <=
2 * sk->sk_sndbuf) 2 * sk->sk_sndbuf)
skb = sock_wmalloc(sk, skb = sock_wmalloc(sk,
alloclen + hh_len + 15, 1, alloclen + hh_len + 15, 1,
@ -1145,7 +1145,7 @@ alloc_new_skb:
skb->len += copy; skb->len += copy;
skb->data_len += copy; skb->data_len += copy;
skb->truesize += copy; skb->truesize += copy;
atomic_add(copy, &sk->sk_wmem_alloc); refcount_add(copy, &sk->sk_wmem_alloc);
} }
offset += copy; offset += copy;
length -= copy; length -= copy;
@ -1369,7 +1369,7 @@ ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
skb->len += len; skb->len += len;
skb->data_len += len; skb->data_len += len;
skb->truesize += len; skb->truesize += len;
atomic_add(len, &sk->sk_wmem_alloc); refcount_add(len, &sk->sk_wmem_alloc);
offset += len; offset += len;
size -= len; size -= len;
} }

4
net/ipv4/tcp.c
Unescape View File

@ -664,7 +664,7 @@ static bool tcp_should_autocork(struct sock *sk, struct sk_buff *skb,
return skb->len < size_goal && return skb->len < size_goal &&
sysctl_tcp_autocorking && sysctl_tcp_autocorking &&
skb != tcp_write_queue_head(sk) && skb != tcp_write_queue_head(sk) &&
atomic_read(&sk->sk_wmem_alloc) > skb->truesize; refcount_read(&sk->sk_wmem_alloc) > skb->truesize;
} }
static void tcp_push(struct sock *sk, int flags, int mss_now, static void tcp_push(struct sock *sk, int flags, int mss_now,
@ -692,7 +692,7 @@ static void tcp_push(struct sock *sk, int flags, int mss_now,
/* It is possible TX completion already happened /* It is possible TX completion already happened
* before we set TSQ_THROTTLED. * before we set TSQ_THROTTLED.
*/ */
if (atomic_read(&sk->sk_wmem_alloc) > skb->truesize) if (refcount_read(&sk->sk_wmem_alloc) > skb->truesize)
return; return;
} }

2
net/ipv4/tcp_offload.c
Unescape View File

@ -152,7 +152,7 @@ struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
swap(gso_skb->sk, skb->sk); swap(gso_skb->sk, skb->sk);
swap(gso_skb->destructor, skb->destructor); swap(gso_skb->destructor, skb->destructor);
sum_truesize += skb->truesize; sum_truesize += skb->truesize;
atomic_add(sum_truesize - gso_skb->truesize, refcount_add(sum_truesize - gso_skb->truesize,
&skb->sk->sk_wmem_alloc); &skb->sk->sk_wmem_alloc);
} }

15
net/ipv4/tcp_output.c
Unescape View File

@ -861,12 +861,11 @@ void tcp_wfree(struct sk_buff *skb)
struct sock *sk = skb->sk; struct sock *sk = skb->sk;
struct tcp_sock *tp = tcp_sk(sk); struct tcp_sock *tp = tcp_sk(sk);
unsigned long flags, nval, oval; unsigned long flags, nval, oval;
int wmem;
/* Keep one reference on sk_wmem_alloc. /* Keep one reference on sk_wmem_alloc.
* Will be released by sk_free() from here or tcp_tasklet_func() * Will be released by sk_free() from here or tcp_tasklet_func()
*/ */
wmem = atomic_sub_return(skb->truesize - 1, &sk->sk_wmem_alloc); WARN_ON(refcount_sub_and_test(skb->truesize - 1, &sk->sk_wmem_alloc));
/* If this softirq is serviced by ksoftirqd, we are likely under stress. /* If this softirq is serviced by ksoftirqd, we are likely under stress.
* Wait until our queues (qdisc + devices) are drained. * Wait until our queues (qdisc + devices) are drained.
@ -875,7 +874,7 @@ void tcp_wfree(struct sk_buff *skb)
* - chance for incoming ACK (processed by another cpu maybe) * - chance for incoming ACK (processed by another cpu maybe)
* to migrate this flow (skb->ooo_okay will be eventually set) * to migrate this flow (skb->ooo_okay will be eventually set)
*/ */
if (wmem >= SKB_TRUESIZE(1) && this_cpu_ksoftirqd() == current) if (refcount_read(&sk->sk_wmem_alloc) >= SKB_TRUESIZE(1) && this_cpu_ksoftirqd() == current)
goto out; goto out;
for (oval = READ_ONCE(sk->sk_tsq_flags);; oval = nval) { for (oval = READ_ONCE(sk->sk_tsq_flags);; oval = nval) {
@ -925,7 +924,7 @@ enum hrtimer_restart tcp_pace_kick(struct hrtimer *timer)
if (nval != oval) if (nval != oval)
continue; continue;
if (!atomic_inc_not_zero(&sk->sk_wmem_alloc)) if (!refcount_inc_not_zero(&sk->sk_wmem_alloc))
break; break;
/* queue this socket to tasklet queue */ /* queue this socket to tasklet queue */
tsq = this_cpu_ptr(&tsq_tasklet); tsq = this_cpu_ptr(&tsq_tasklet);
@ -1045,7 +1044,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
skb->sk = sk; skb->sk = sk;
skb->destructor = skb_is_tcp_pure_ack(skb) ? __sock_wfree : tcp_wfree; skb->destructor = skb_is_tcp_pure_ack(skb) ? __sock_wfree : tcp_wfree;
skb_set_hash_from_sk(skb, sk); skb_set_hash_from_sk(skb, sk);
atomic_add(skb->truesize, &sk->sk_wmem_alloc); refcount_add(skb->truesize, &sk->sk_wmem_alloc);
skb_set_dst_pending_confirm(skb, sk->sk_dst_pending_confirm); skb_set_dst_pending_confirm(skb, sk->sk_dst_pending_confirm);
@ -2176,7 +2175,7 @@ static bool tcp_small_queue_check(struct sock *sk, const struct sk_buff *skb,
limit = min_t(u32, limit, sysctl_tcp_limit_output_bytes); limit = min_t(u32, limit, sysctl_tcp_limit_output_bytes);
limit <<= factor; limit <<= factor;
if (atomic_read(&sk->sk_wmem_alloc) > limit) { if (refcount_read(&sk->sk_wmem_alloc) > limit) {
/* Always send the 1st or 2nd skb in write queue. /* Always send the 1st or 2nd skb in write queue.
* No need to wait for TX completion to call us back, * No need to wait for TX completion to call us back,
* after softirq/tasklet schedule. * after softirq/tasklet schedule.
@ -2192,7 +2191,7 @@ static bool tcp_small_queue_check(struct sock *sk, const struct sk_buff *skb,
* test again the condition. * test again the condition.
*/ */
smp_mb__after_atomic(); smp_mb__after_atomic();
if (atomic_read(&sk->sk_wmem_alloc) > limit) if (refcount_read(&sk->sk_wmem_alloc) > limit)
return true; return true;
} }
return false; return false;
@ -2812,7 +2811,7 @@ int __tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb, int segs)
/* Do not sent more than we queued. 1/4 is reserved for possible /* Do not sent more than we queued. 1/4 is reserved for possible
* copying overhead: fragmentation, tunneling, mangling etc. * copying overhead: fragmentation, tunneling, mangling etc.
*/ */
if (atomic_read(&sk->sk_wmem_alloc) > if (refcount_read(&sk->sk_wmem_alloc) >
min_t(u32, sk->sk_wmem_queued + (sk->sk_wmem_queued >> 2), min_t(u32, sk->sk_wmem_queued + (sk->sk_wmem_queued >> 2),
sk->sk_sndbuf)) sk->sk_sndbuf))
return -EAGAIN; return -EAGAIN;

2
net/ipv6/esp6.c
Unescape View File

@ -275,7 +275,7 @@ int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info
skb->data_len += tailen; skb->data_len += tailen;
skb->truesize += tailen; skb->truesize += tailen;
if (sk) if (sk)
atomic_add(tailen, &sk->sk_wmem_alloc); refcount_add(tailen, &sk->sk_wmem_alloc);
goto out; goto out;
} }

4
net/ipv6/ip6_output.c
Unescape View File

@ -1472,7 +1472,7 @@ alloc_new_skb:
(flags & MSG_DONTWAIT), &err); (flags & MSG_DONTWAIT), &err);
} else { } else {
skb = NULL; skb = NULL;
if (atomic_read(&sk->sk_wmem_alloc) <= if (refcount_read(&sk->sk_wmem_alloc) <=
2 * sk->sk_sndbuf) 2 * sk->sk_sndbuf)
skb = sock_wmalloc(sk, skb = sock_wmalloc(sk,
alloclen + hh_len, 1, alloclen + hh_len, 1,
@ -1581,7 +1581,7 @@ alloc_new_skb:
skb->len += copy; skb->len += copy;
skb->data_len += copy; skb->data_len += copy;
skb->truesize += copy; skb->truesize += copy;
atomic_add(copy, &sk->sk_wmem_alloc); refcount_add(copy, &sk->sk_wmem_alloc);
} }
offset += copy; offset += copy;
length -= copy; length -= copy;

2
net/kcm/kcmproc.c
Unescape View File

@ -162,7 +162,7 @@ static void kcm_format_psock(struct kcm_psock *psock, struct seq_file *seq,
psock->sk->sk_receive_queue.qlen, psock->sk->sk_receive_queue.qlen,
atomic_read(&psock->sk->sk_rmem_alloc), atomic_read(&psock->sk->sk_rmem_alloc),
psock->sk->sk_write_queue.qlen, psock->sk->sk_write_queue.qlen,
atomic_read(&psock->sk->sk_wmem_alloc)); refcount_read(&psock->sk->sk_wmem_alloc));
if (psock->done) if (psock->done)
seq_puts(seq, "Done "); seq_puts(seq, "Done ");

2
net/key/af_key.c
Unescape View File

@ -109,7 +109,7 @@ static void pfkey_sock_destruct(struct sock *sk)
} }
WARN_ON(atomic_read(&sk->sk_rmem_alloc)); WARN_ON(atomic_read(&sk->sk_rmem_alloc));
WARN_ON(atomic_read(&sk->sk_wmem_alloc)); WARN_ON(refcount_read(&sk->sk_wmem_alloc));
atomic_dec(&net_pfkey->socks_nr); atomic_dec(&net_pfkey->socks_nr);
} }

2
net/netlink/af_netlink.c
Unescape View File

@ -372,7 +372,7 @@ static void netlink_sock_destruct(struct sock *sk)
} }
WARN_ON(atomic_read(&sk->sk_rmem_alloc)); WARN_ON(atomic_read(&sk->sk_rmem_alloc));
WARN_ON(atomic_read(&sk->sk_wmem_alloc)); WARN_ON(refcount_read(&sk->sk_wmem_alloc));
WARN_ON(nlk_sk(sk)->groups); WARN_ON(nlk_sk(sk)->groups);
} }

4
net/packet/af_packet.c
Unescape View File

@ -1317,7 +1317,7 @@ static void packet_sock_destruct(struct sock *sk)
skb_queue_purge(&sk->sk_error_queue); skb_queue_purge(&sk->sk_error_queue);
WARN_ON(atomic_read(&sk->sk_rmem_alloc)); WARN_ON(atomic_read(&sk->sk_rmem_alloc));
WARN_ON(atomic_read(&sk->sk_wmem_alloc)); WARN_ON(refcount_read(&sk->sk_wmem_alloc));
if (!sock_flag(sk, SOCK_DEAD)) { if (!sock_flag(sk, SOCK_DEAD)) {
pr_err("Attempt to release alive packet socket: %p\n", sk); pr_err("Attempt to release alive packet socket: %p\n", sk);
@ -2523,7 +2523,7 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb,
skb->data_len = to_write; skb->data_len = to_write;
skb->len += to_write; skb->len += to_write;
skb->truesize += to_write; skb->truesize += to_write;
atomic_add(to_write, &po->sk.sk_wmem_alloc); refcount_add(to_write, &po->sk.sk_wmem_alloc);
while (likely(to_write)) { while (likely(to_write)) {
nr_frags = skb_shinfo(skb)->nr_frags; nr_frags = skb_shinfo(skb)->nr_frags;

2
net/phonet/socket.c
Unescape View File

@ -360,7 +360,7 @@ static unsigned int pn_socket_poll(struct file *file, struct socket *sock,
return POLLHUP; return POLLHUP;
if (sk->sk_state == TCP_ESTABLISHED && if (sk->sk_state == TCP_ESTABLISHED &&
atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf && refcount_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf &&
atomic_read(&pn->tx_credits)) atomic_read(&pn->tx_credits))
mask |= POLLOUT | POLLWRNORM | POLLWRBAND; mask |= POLLOUT | POLLWRNORM | POLLWRBAND;

2
net/rds/tcp_send.c
Unescape View File

@ -202,7 +202,7 @@ void rds_tcp_write_space(struct sock *sk)
tc->t_last_seen_una = rds_tcp_snd_una(tc); tc->t_last_seen_una = rds_tcp_snd_una(tc);
rds_send_path_drop_acked(cp, rds_tcp_snd_una(tc), rds_tcp_is_acked); rds_send_path_drop_acked(cp, rds_tcp_snd_una(tc), rds_tcp_is_acked);
if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) if ((refcount_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf)
queue_delayed_work(rds_wq, &cp->cp_send_w, 0); queue_delayed_work(rds_wq, &cp->cp_send_w, 0);
out: out:

4
net/rxrpc/af_rxrpc.c
Unescape View File

@ -53,7 +53,7 @@ static void rxrpc_sock_destructor(struct sock *);
*/ */
static inline int rxrpc_writable(struct sock *sk) static inline int rxrpc_writable(struct sock *sk)
{ {
return atomic_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf; return refcount_read(&sk->sk_wmem_alloc) < (size_t) sk->sk_sndbuf;
} }
/* /*
@ -730,7 +730,7 @@ static void rxrpc_sock_destructor(struct sock *sk)
rxrpc_purge_queue(&sk->sk_receive_queue); rxrpc_purge_queue(&sk->sk_receive_queue);
WARN_ON(atomic_read(&sk->sk_wmem_alloc)); WARN_ON(refcount_read(&sk->sk_wmem_alloc));
WARN_ON(!sk_unhashed(sk)); WARN_ON(!sk_unhashed(sk));
WARN_ON(sk->sk_socket); WARN_ON(sk->sk_socket);

2
net/sched/sch_atm.c
Unescape View File

@ -498,7 +498,7 @@ static void sch_atm_dequeue(unsigned long data)
ATM_SKB(skb)->vcc = flow->vcc; ATM_SKB(skb)->vcc = flow->vcc;
memcpy(skb_push(skb, flow->hdr_len), flow->hdr, memcpy(skb_push(skb, flow->hdr_len), flow->hdr,
flow->hdr_len); flow->hdr_len);
atomic_add(skb->truesize, refcount_add(skb->truesize,
&sk_atm(flow->vcc)->sk_wmem_alloc); &sk_atm(flow->vcc)->sk_wmem_alloc);
/* atm.atm_options are already set by atm_tc_enqueue */ /* atm.atm_options are already set by atm_tc_enqueue */
flow->vcc->send(flow->vcc, skb); flow->vcc->send(flow->vcc, skb);

2
net/sctp/output.c
Unescape View File

@ -402,7 +402,7 @@ static void sctp_packet_set_owner_w(struct sk_buff *skb, struct sock *sk)
* therefore only reserve a single byte to keep socket around until * therefore only reserve a single byte to keep socket around until
* the packet has been transmitted. * the packet has been transmitted.
*/ */
atomic_inc(&sk->sk_wmem_alloc); refcount_inc(&sk->sk_wmem_alloc);
} }
static int sctp_packet_pack(struct sctp_packet *packet, static int sctp_packet_pack(struct sctp_packet *packet,

2
net/sctp/proc.c
Unescape View File

@ -363,7 +363,7 @@ static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
assoc->stream.outcnt, assoc->max_retrans, assoc->stream.outcnt, assoc->max_retrans,
assoc->init_retries, assoc->shutdown_retries, assoc->init_retries, assoc->shutdown_retries,
assoc->rtx_data_chunks, assoc->rtx_data_chunks,
atomic_read(&sk->sk_wmem_alloc), refcount_read(&sk->sk_wmem_alloc),
sk->sk_wmem_queued, sk->sk_wmem_queued,
sk->sk_sndbuf, sk->sk_sndbuf,
sk->sk_rcvbuf); sk->sk_rcvbuf);

4
net/sctp/socket.c
Unescape View File

@ -164,7 +164,7 @@ static inline void sctp_set_owner_w(struct sctp_chunk *chunk)
sizeof(struct sk_buff) + sizeof(struct sk_buff) +
sizeof(struct sctp_chunk); sizeof(struct sctp_chunk);
atomic_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
sk->sk_wmem_queued += chunk->skb->truesize; sk->sk_wmem_queued += chunk->skb->truesize;
sk_mem_charge(sk, chunk->skb->truesize); sk_mem_charge(sk, chunk->skb->truesize);
} }
@ -7684,7 +7684,7 @@ static void sctp_wfree(struct sk_buff *skb)
sizeof(struct sk_buff) + sizeof(struct sk_buff) +
sizeof(struct sctp_chunk); sizeof(struct sctp_chunk);
atomic_sub(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc));
/* /*
* This undoes what is done via sctp_set_owner_w and sk_mem_charge * This undoes what is done via sctp_set_owner_w and sk_mem_charge

6
net/unix/af_unix.c
Unescape View File

@ -442,7 +442,7 @@ static int unix_dgram_peer_wake_me(struct sock *sk, struct sock *other)
static int unix_writable(const struct sock *sk) static int unix_writable(const struct sock *sk)
{ {
return sk->sk_state != TCP_LISTEN && return sk->sk_state != TCP_LISTEN &&
(atomic_read(&sk->sk_wmem_alloc) << 2) <= sk->sk_sndbuf; (refcount_read(&sk->sk_wmem_alloc) << 2) <= sk->sk_sndbuf;
} }
static void unix_write_space(struct sock *sk) static void unix_write_space(struct sock *sk)
@ -487,7 +487,7 @@ static void unix_sock_destructor(struct sock *sk)
skb_queue_purge(&sk->sk_receive_queue); skb_queue_purge(&sk->sk_receive_queue);
WARN_ON(atomic_read(&sk->sk_wmem_alloc)); WARN_ON(refcount_read(&sk->sk_wmem_alloc));
WARN_ON(!sk_unhashed(sk)); WARN_ON(!sk_unhashed(sk));
WARN_ON(sk->sk_socket); WARN_ON(sk->sk_socket);
if (!sock_flag(sk, SOCK_DEAD)) { if (!sock_flag(sk, SOCK_DEAD)) {
@ -2033,7 +2033,7 @@ alloc_skb:
skb->len += size; skb->len += size;
skb->data_len += size; skb->data_len += size;
skb->truesize += size; skb->truesize += size;
atomic_add(size, &sk->sk_wmem_alloc); refcount_add(size, &sk->sk_wmem_alloc);
if (newskb) { if (newskb) {
err = unix_scm_to_skb(&scm, skb, false); err = unix_scm_to_skb(&scm, skb, false);

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