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O shut up T3Q. You'll never be the man your mother was.

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This commit is contained in:
Raziel K. Crowe 2022-03-22 19:06:02 +05:00
parent 604a706f77
commit 2da4b5c5e4
21 changed files with 142 additions and 68 deletions
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7
net/ax25/af_ax25.c
View File

@ -87,6 +87,13 @@ static void ax25_kill_by_device(struct net_device *dev)
ax25_for_each(s, &ax25_list) {
if (s->ax25_dev == ax25_dev) {
sk = s->sk;
if (!sk) {
spin_unlock_bh(&ax25_list_lock);
s->ax25_dev = NULL;
ax25_disconnect(s, ENETUNREACH);
spin_lock_bh(&ax25_list_lock);
goto again;
}
sock_hold(sk);
spin_unlock_bh(&ax25_list_lock);
lock_sock(sk);

1
net/bluetooth/hci_core.c
View File

@ -4083,6 +4083,7 @@ void hci_release_dev(struct hci_dev *hdev)
hci_dev_unlock(hdev);
ida_simple_remove(&hci_index_ida, hdev->id);
kfree_skb(hdev->sent_cmd);
kfree(hdev);
}
EXPORT_SYMBOL(hci_release_dev);

2
net/core/net-sysfs.c
View File

@ -213,7 +213,7 @@ static ssize_t speed_show(struct device *dev,
if (!rtnl_trylock())
return restart_syscall();
if (netif_running(netdev)) {
if (netif_running(netdev) && netif_device_present(netdev)) {
struct ethtool_link_ksettings cmd;
if (!__ethtool_get_link_ksettings(netdev, &cmd))

5
net/ipv4/esp4.c
View File

@ -446,6 +446,7 @@ int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *
struct page *page;
struct sk_buff *trailer;
int tailen = esp->tailen;
unsigned int allocsz;
/* this is non-NULL only with TCP/UDP Encapsulation */
if (x->encap) {
@ -455,6 +456,10 @@ int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *
return err;
}
allocsz = ALIGN(skb->data_len + tailen, L1_CACHE_BYTES);
if (allocsz > ESP_SKB_FRAG_MAXSIZE)
goto cow;
if (!skb_cloned(skb)) {
if (tailen <= skb_tailroom(skb)) {
nfrags = 1;

3
net/ipv4/esp4_offload.c
View File

@ -159,6 +159,9 @@ static struct sk_buff *xfrm4_beet_gso_segment(struct xfrm_state *x,
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV4;
}
if (proto == IPPROTO_IPV6)
skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP4;
__skb_pull(skb, skb_transport_offset(skb));
ops = rcu_dereference(inet_offloads[proto]);
if (likely(ops && ops->callbacks.gso_segment))

10
net/ipv4/tcp.c
View File

@ -1663,11 +1663,13 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
if (!copied)
copied = used;
break;
} else if (used <= len) {
seq += used;
copied += used;
offset += used;
}
if (WARN_ON_ONCE(used > len))
used = len;
seq += used;
copied += used;
offset += used;
/* If recv_actor drops the lock (e.g. TCP splice
* receive) the skb pointer might be invalid when
* getting here: tcp_collapse might have deleted it

2
net/ipv6/addrconf.c
View File

@ -5000,6 +5000,7 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
nla_put_s32(skb, IFA_TARGET_NETNSID, args->netnsid))
goto error;
spin_lock_bh(&ifa->lock);
if (!((ifa->flags&IFA_F_PERMANENT) &&
(ifa->prefered_lft == INFINITY_LIFE_TIME))) {
preferred = ifa->prefered_lft;
@ -5021,6 +5022,7 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
preferred = INFINITY_LIFE_TIME;
valid = INFINITY_LIFE_TIME;
}
spin_unlock_bh(&ifa->lock);
if (!ipv6_addr_any(&ifa->peer_addr)) {
if (nla_put_in6_addr(skb, IFA_LOCAL, &ifa->addr) < 0 ||

5
net/ipv6/esp6.c
View File

@ -483,6 +483,7 @@ int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info
struct page *page;
struct sk_buff *trailer;
int tailen = esp->tailen;
unsigned int allocsz;
if (x->encap) {
int err = esp6_output_encap(x, skb, esp);
@ -491,6 +492,10 @@ int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info
return err;
}
allocsz = ALIGN(skb->data_len + tailen, L1_CACHE_BYTES);
if (allocsz > ESP_SKB_FRAG_MAXSIZE)
goto cow;
if (!skb_cloned(skb)) {
if (tailen <= skb_tailroom(skb)) {
nfrags = 1;

3
net/ipv6/esp6_offload.c
View File

@ -198,6 +198,9 @@ static struct sk_buff *xfrm6_beet_gso_segment(struct xfrm_state *x,
ipv6_skip_exthdr(skb, 0, &proto, &frag);
}
if (proto == IPPROTO_IPIP)
skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP6;
__skb_pull(skb, skb_transport_offset(skb));
ops = rcu_dereference(inet6_offloads[proto]);
if (likely(ops && ops->callbacks.gso_segment))

2
net/key/af_key.c
View File

@ -2623,7 +2623,7 @@ static int pfkey_migrate(struct sock *sk, struct sk_buff *skb,
}
return xfrm_migrate(&sel, dir, XFRM_POLICY_TYPE_MAIN, m, i,
kma ? &k : NULL, net, NULL);
kma ? &k : NULL, net, NULL, 0);
out:
return err;

10
net/mac80211/agg-tx.c
View File

@ -9,7 +9,7 @@
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
* Copyright 2007-2010, Intel Corporation
* Copyright(c) 2015-2017 Intel Deutschland GmbH
* Copyright (C) 2018 - 2021 Intel Corporation
* Copyright (C) 2018 - 2022 Intel Corporation
*/
#include <linux/ieee80211.h>
@ -626,6 +626,14 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
return -EINVAL;
}
if (test_sta_flag(sta, WLAN_STA_MFP) &&
!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) {
ht_dbg(sdata,
"MFP STA not authorized - deny BA session request %pM tid %d\n",
sta->sta.addr, tid);
return -EINVAL;
}
/*
* 802.11n-2009 11.5.1.1: If the initiating STA is an HT STA, is a
* member of an IBSS, and has no other existing Block Ack agreement

9
net/sctp/diag.c
View File

@ -61,10 +61,6 @@ static void inet_diag_msg_sctpasoc_fill(struct inet_diag_msg *r,
r->idiag_timer = SCTP_EVENT_TIMEOUT_T3_RTX;
r->idiag_retrans = asoc->rtx_data_chunks;
r->idiag_expires = jiffies_to_msecs(t3_rtx->expires - jiffies);
} else {
r->idiag_timer = 0;
r->idiag_retrans = 0;
r->idiag_expires = 0;
}
}
@ -144,13 +140,14 @@ static int inet_sctp_diag_fill(struct sock *sk, struct sctp_association *asoc,
r = nlmsg_data(nlh);
BUG_ON(!sk_fullsock(sk));
r->idiag_timer = 0;
r->idiag_retrans = 0;
r->idiag_expires = 0;
if (asoc) {
inet_diag_msg_sctpasoc_fill(r, sk, asoc);
} else {
inet_diag_msg_common_fill(r, sk);
r->idiag_state = sk->sk_state;
r->idiag_timer = 0;
r->idiag_retrans = 0;
}
if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin))

12
net/tipc/bearer.c
View File

@ -352,16 +352,18 @@ static int tipc_enable_bearer(struct net *net, const char *name,
goto rejected;
}
/* Create monitoring data before accepting activate messages */
if (tipc_mon_create(net, bearer_id)) {
bearer_disable(net, b);
kfree_skb(skb);
return -ENOMEM;
}
test_and_set_bit_lock(0, &b->up);
rcu_assign_pointer(tn->bearer_list[bearer_id], b);
if (skb)
tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
if (tipc_mon_create(net, bearer_id)) {
bearer_disable(net, b);
return -ENOMEM;
}
pr_info("Enabled bearer <%s>, priority %u\n", name, prio);
return res;

9
net/tipc/link.c
View File

@ -2285,6 +2285,11 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
break;
case STATE_MSG:
/* Validate Gap ACK blocks, drop if invalid */
glen = tipc_get_gap_ack_blks(&ga, l, hdr, true);
if (glen > dlen)
break;
l->rcv_nxt_state = msg_seqno(hdr) + 1;
/* Update own tolerance if peer indicates a non-zero value */
@ -2310,10 +2315,6 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
break;
}
/* Receive Gap ACK blocks from peer if any */
glen = tipc_get_gap_ack_blks(&ga, l, hdr, true);
if(glen > dlen)
break;
tipc_mon_rcv(l->net, data + glen, dlen - glen, l->addr,
&l->mon_state, l->bearer_id);

3
net/wireless/nl80211.c
View File

@ -17525,7 +17525,8 @@ void cfg80211_ch_switch_notify(struct net_device *dev,
wdev->chandef = *chandef;
wdev->preset_chandef = *chandef;
if (wdev->iftype == NL80211_IFTYPE_STATION &&
if ((wdev->iftype == NL80211_IFTYPE_STATION ||
wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
!WARN_ON(!wdev->current_bss))
cfg80211_update_assoc_bss_entry(wdev, chandef->chan);

14
net/xfrm/xfrm_policy.c
View File

@ -4259,7 +4259,7 @@ static bool xfrm_migrate_selector_match(const struct xfrm_selector *sel_cmp,
}
static struct xfrm_policy *xfrm_migrate_policy_find(const struct xfrm_selector *sel,
u8 dir, u8 type, struct net *net)
u8 dir, u8 type, struct net *net, u32 if_id)
{
struct xfrm_policy *pol, *ret = NULL;
struct hlist_head *chain;
@ -4268,7 +4268,8 @@ static struct xfrm_policy *xfrm_migrate_policy_find(const struct xfrm_selector *
spin_lock_bh(&net->xfrm.xfrm_policy_lock);
chain = policy_hash_direct(net, &sel->daddr, &sel->saddr, sel->family, dir);
hlist_for_each_entry(pol, chain, bydst) {
if (xfrm_migrate_selector_match(sel, &pol->selector) &&
if ((if_id == 0 || pol->if_id == if_id) &&
xfrm_migrate_selector_match(sel, &pol->selector) &&
pol->type == type) {
ret = pol;
priority = ret->priority;
@ -4280,7 +4281,8 @@ static struct xfrm_policy *xfrm_migrate_policy_find(const struct xfrm_selector *
if ((pol->priority >= priority) && ret)
break;
if (xfrm_migrate_selector_match(sel, &pol->selector) &&
if ((if_id == 0 || pol->if_id == if_id) &&
xfrm_migrate_selector_match(sel, &pol->selector) &&
pol->type == type) {
ret = pol;
break;
@ -4396,7 +4398,7 @@ static int xfrm_migrate_check(const struct xfrm_migrate *m, int num_migrate)
int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
struct xfrm_migrate *m, int num_migrate,
struct xfrm_kmaddress *k, struct net *net,
struct xfrm_encap_tmpl *encap)
struct xfrm_encap_tmpl *encap, u32 if_id)
{
int i, err, nx_cur = 0, nx_new = 0;
struct xfrm_policy *pol = NULL;
@ -4415,14 +4417,14 @@ int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
}
/* Stage 1 - find policy */
if ((pol = xfrm_migrate_policy_find(sel, dir, type, net)) == NULL) {
if ((pol = xfrm_migrate_policy_find(sel, dir, type, net, if_id)) == NULL) {
err = -ENOENT;
goto out;
}
/* Stage 2 - find and update state(s) */
for (i = 0, mp = m; i < num_migrate; i++, mp++) {
if ((x = xfrm_migrate_state_find(mp, net))) {
if ((x = xfrm_migrate_state_find(mp, net, if_id))) {
x_cur[nx_cur] = x;
nx_cur++;
xc = xfrm_state_migrate(x, mp, encap);

15
net/xfrm/xfrm_state.c
View File

@ -1578,9 +1578,6 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
memcpy(&x->mark, &orig->mark, sizeof(x->mark));
memcpy(&x->props.smark, &orig->props.smark, sizeof(x->props.smark));
if (xfrm_init_state(x) < 0)
goto error;
x->props.flags = orig->props.flags;
x->props.extra_flags = orig->props.extra_flags;
@ -1605,7 +1602,8 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
return NULL;
}
struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net)
struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net,
u32 if_id)
{
unsigned int h;
struct xfrm_state *x = NULL;
@ -1621,6 +1619,8 @@ struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *n
continue;
if (m->reqid && x->props.reqid != m->reqid)
continue;
if (if_id != 0 && x->if_id != if_id)
continue;
if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
m->old_family) ||
!xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
@ -1636,6 +1636,8 @@ struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *n
if (x->props.mode != m->mode ||
x->id.proto != m->proto)
continue;
if (if_id != 0 && x->if_id != if_id)
continue;
if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
m->old_family) ||
!xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
@ -1662,6 +1664,11 @@ struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
if (!xc)
return NULL;
xc->props.family = m->new_family;
if (xfrm_init_state(xc) < 0)
goto error;
memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));

27
net/xfrm/xfrm_user.c
View File

@ -629,13 +629,8 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
xfrm_smark_init(attrs, &x->props.smark);
if (attrs[XFRMA_IF_ID]) {
if (attrs[XFRMA_IF_ID])
x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
if (!x->if_id) {
err = -EINVAL;
goto error;
}
}
err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
if (err)
@ -1431,13 +1426,8 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
mark = xfrm_mark_get(attrs, &m);
if (attrs[XFRMA_IF_ID]) {
if (attrs[XFRMA_IF_ID])
if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
if (!if_id) {
err = -EINVAL;
goto out_noput;
}
}
if (p->info.seq) {
x = xfrm_find_acq_byseq(net, mark, p->info.seq);
@ -1750,13 +1740,8 @@ static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_us
xfrm_mark_get(attrs, &xp->mark);
if (attrs[XFRMA_IF_ID]) {
if (attrs[XFRMA_IF_ID])
xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
if (!xp->if_id) {
err = -EINVAL;
goto error;
}
}
return xp;
error:
@ -2607,6 +2592,7 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
int n = 0;
struct net *net = sock_net(skb->sk);
struct xfrm_encap_tmpl *encap = NULL;
u32 if_id = 0;
if (attrs[XFRMA_MIGRATE] == NULL)
return -EINVAL;
@ -2631,7 +2617,10 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
return -ENOMEM;
}
err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
if (attrs[XFRMA_IF_ID])
if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap, if_id);
kfree(encap);

21
tools/testing/selftests/net/pmtu.sh
View File

@ -374,6 +374,16 @@ run_cmd() {
return $rc
}
run_cmd_bg() {
cmd="$*"
if [ "$VERBOSE" = "1" ]; then
printf " COMMAND: %s &\n" "${cmd}"
fi
$cmd 2>&1 &
}
# Find the auto-generated name for this namespace
nsname() {
eval echo \$NS_$1
@ -670,10 +680,10 @@ setup_nettest_xfrm() {
[ ${1} -eq 6 ] && proto="-6" || proto=""
port=${2}
run_cmd ${ns_a} nettest ${proto} -q -D -s -x -p ${port} -t 5 &
run_cmd_bg "${ns_a}" nettest "${proto}" -q -D -s -x -p "${port}" -t 5
nettest_pids="${nettest_pids} $!"
run_cmd ${ns_b} nettest ${proto} -q -D -s -x -p ${port} -t 5 &
run_cmd_bg "${ns_b}" nettest "${proto}" -q -D -s -x -p "${port}" -t 5
nettest_pids="${nettest_pids} $!"
}
@ -865,7 +875,6 @@ setup_ovs_bridge() {
setup() {
[ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip
cleanup
for arg do
eval setup_${arg} || { echo " ${arg} not supported"; return 1; }
done
@ -876,7 +885,7 @@ trace() {
for arg do
[ "${ns_cmd}" = "" ] && ns_cmd="${arg}" && continue
${ns_cmd} tcpdump -s 0 -i "${arg}" -w "${name}_${arg}.pcap" 2> /dev/null &
${ns_cmd} tcpdump --immediate-mode -s 0 -i "${arg}" -w "${name}_${arg}.pcap" 2> /dev/null &
tcpdump_pids="${tcpdump_pids} $!"
ns_cmd=
done
@ -1836,6 +1845,10 @@ run_test() {
unset IFS
# Since cleanup() relies on variables modified by this subshell, it
# has to run in this context.
trap cleanup EXIT
if [ "$VERBOSE" = "1" ]; then
printf "\n##########################################################################\n\n"
fi

49
tools/testing/selftests/vm/map_fixed_noreplace.c
View File

@ -17,9 +17,6 @@
#define MAP_FIXED_NOREPLACE 0x100000
#endif
#define BASE_ADDRESS (256ul * 1024 * 1024)
static void dump_maps(void)
{
char cmd[32];
@ -28,18 +25,46 @@ static void dump_maps(void)
system(cmd);
}
static unsigned long find_base_addr(unsigned long size)
{
void *addr;
unsigned long flags;
flags = MAP_PRIVATE | MAP_ANONYMOUS;
addr = mmap(NULL, size, PROT_NONE, flags, -1, 0);
if (addr == MAP_FAILED) {
printf("Error: couldn't map the space we need for the test\n");
return 0;
}
if (munmap(addr, size) != 0) {
printf("Error: couldn't map the space we need for the test\n");
return 0;
}
return (unsigned long)addr;
}
int main(void)
{
unsigned long base_addr;
unsigned long flags, addr, size, page_size;
char *p;
page_size = sysconf(_SC_PAGE_SIZE);
//let's find a base addr that is free before we start the tests
size = 5 * page_size;
base_addr = find_base_addr(size);
if (!base_addr) {
printf("Error: couldn't map the space we need for the test\n");
return 1;
}
flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE;
// Check we can map all the areas we need below
errno = 0;
addr = BASE_ADDRESS;
addr = base_addr;
size = 5 * page_size;
p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
@ -60,7 +85,7 @@ int main(void)
printf("unmap() successful\n");
errno = 0;
addr = BASE_ADDRESS + page_size;
addr = base_addr + page_size;
size = 3 * page_size;
p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
@ -80,7 +105,7 @@ int main(void)
* +4 | free | new
*/
errno = 0;
addr = BASE_ADDRESS;
addr = base_addr;
size = 5 * page_size;
p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
@ -101,7 +126,7 @@ int main(void)
* +4 | free |
*/
errno = 0;
addr = BASE_ADDRESS + (2 * page_size);
addr = base_addr + (2 * page_size);
size = page_size;
p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
@ -121,7 +146,7 @@ int main(void)
* +4 | free | new
*/
errno = 0;
addr = BASE_ADDRESS + (3 * page_size);
addr = base_addr + (3 * page_size);
size = 2 * page_size;
p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
@ -141,7 +166,7 @@ int main(void)
* +4 | free |
*/
errno = 0;
addr = BASE_ADDRESS;
addr = base_addr;
size = 2 * page_size;
p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
@ -161,7 +186,7 @@ int main(void)
* +4 | free |
*/
errno = 0;
addr = BASE_ADDRESS;
addr = base_addr;
size = page_size;
p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
@ -181,7 +206,7 @@ int main(void)
* +4 | free | new
*/
errno = 0;
addr = BASE_ADDRESS + (4 * page_size);
addr = base_addr + (4 * page_size);
size = page_size;
p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
@ -192,7 +217,7 @@ int main(void)
return 1;
}
addr = BASE_ADDRESS;
addr = base_addr;
size = 5 * page_size;
if (munmap((void *)addr, size) != 0) {
dump_maps();

1
tools/testing/selftests/vm/userfaultfd.c
View File

@ -46,6 +46,7 @@
#include <signal.h>
#include <poll.h>
#include <string.h>
#include <linux/mman.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <sys/ioctl.h>