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authorLinus Torvalds <torvalds@linux-foundation.org>2020-08-13 20:03:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-13 20:03:11 -0700
commita1d21081a60dfb7fddf4a38b66d9cef603b317a9 (patch)
tree0c1a57f09afc4dbebf3133aed9ca7e4f6f6b38f1 /kernel
parente764a1e32337aaf325fc5b14a5bbd06eabba4699 (diff)
parent1f3a090b9033f69de380c03db3ea1a1015c850cf (diff)
downloadlinux-a1d21081a60dfb7fddf4a38b66d9cef603b317a9.tar.bz2
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from David Miller: "Some merge window fallout, some longer term fixes: 1) Handle headroom properly in lapbether and x25_asy drivers, from Xie He. 2) Fetch MAC address from correct r8152 device node, from Thierry Reding. 3) In the sw kTLS path we should allow MSG_CMSG_COMPAT in sendmsg, from Rouven Czerwinski. 4) Correct fdputs in socket layer, from Miaohe Lin. 5) Revert troublesome sockptr_t optimization, from Christoph Hellwig. 6) Fix TCP TFO key reading on big endian, from Jason Baron. 7) Missing CAP_NET_RAW check in nfc, from Qingyu Li. 8) Fix inet fastreuse optimization with tproxy sockets, from Tim Froidcoeur. 9) Fix 64-bit divide in new SFC driver, from Edward Cree. 10) Add a tracepoint for prandom_u32 so that we can more easily perform usage analysis. From Eric Dumazet. 11) Fix rwlock imbalance in AF_PACKET, from John Ogness" * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (49 commits) net: openvswitch: introduce common code for flushing flows af_packet: TPACKET_V3: fix fill status rwlock imbalance random32: add a tracepoint for prandom_u32() Revert "ipv4: tunnel: fix compilation on ARCH=um" net: accept an empty mask in /sys/class/net/*/queues/rx-*/rps_cpus net: ethernet: stmmac: Disable hardware multicast filter net: stmmac: dwmac1000: provide multicast filter fallback ipv4: tunnel: fix compilation on ARCH=um vsock: fix potential null pointer dereference in vsock_poll() sfc: fix ef100 design-param checking net: initialize fastreuse on inet_inherit_port net: refactor bind_bucket fastreuse into helper net: phy: marvell10g: fix null pointer dereference net: Fix potential memory leak in proto_register() net: qcom/emac: add missed clk_disable_unprepare in error path of emac_clks_phase1_init ionic_lif: Use devm_kcalloc() in ionic_qcq_alloc() net/nfc/rawsock.c: add CAP_NET_RAW check. hinic: fix strncpy output truncated compile warnings drivers/net/wan/x25_asy: Added needed_headroom and a skb->len check net/tls: Fix kmap usage ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/bpf/bpf_iter.c58
-rw-r--r--kernel/bpf/core.c2
-rw-r--r--kernel/bpf/map_iter.c37
-rw-r--r--kernel/bpf/syscall.c2
-rw-r--r--kernel/bpf/verifier.c2
-rw-r--r--kernel/trace/bpf_trace.c2
6 files changed, 62 insertions, 41 deletions
diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c
index 363b9cafc2d8..b6715964b685 100644
--- a/kernel/bpf/bpf_iter.c
+++ b/kernel/bpf/bpf_iter.c
@@ -338,8 +338,8 @@ static void bpf_iter_link_release(struct bpf_link *link)
struct bpf_iter_link *iter_link =
container_of(link, struct bpf_iter_link, link);
- if (iter_link->aux.map)
- bpf_map_put_with_uref(iter_link->aux.map);
+ if (iter_link->tinfo->reg_info->detach_target)
+ iter_link->tinfo->reg_info->detach_target(&iter_link->aux);
}
static void bpf_iter_link_dealloc(struct bpf_link *link)
@@ -390,15 +390,35 @@ bool bpf_link_is_iter(struct bpf_link *link)
int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
{
+ union bpf_iter_link_info __user *ulinfo;
struct bpf_link_primer link_primer;
struct bpf_iter_target_info *tinfo;
- struct bpf_iter_aux_info aux = {};
+ union bpf_iter_link_info linfo;
struct bpf_iter_link *link;
- u32 prog_btf_id, target_fd;
+ u32 prog_btf_id, linfo_len;
bool existed = false;
- struct bpf_map *map;
int err;
+ if (attr->link_create.target_fd || attr->link_create.flags)
+ return -EINVAL;
+
+ memset(&linfo, 0, sizeof(union bpf_iter_link_info));
+
+ ulinfo = u64_to_user_ptr(attr->link_create.iter_info);
+ linfo_len = attr->link_create.iter_info_len;
+ if (!ulinfo ^ !linfo_len)
+ return -EINVAL;
+
+ if (ulinfo) {
+ err = bpf_check_uarg_tail_zero(ulinfo, sizeof(linfo),
+ linfo_len);
+ if (err)
+ return err;
+ linfo_len = min_t(u32, linfo_len, sizeof(linfo));
+ if (copy_from_user(&linfo, ulinfo, linfo_len))
+ return -EFAULT;
+ }
+
prog_btf_id = prog->aux->attach_btf_id;
mutex_lock(&targets_mutex);
list_for_each_entry(tinfo, &targets, list) {
@@ -411,13 +431,6 @@ int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
if (!existed)
return -ENOENT;
- /* Make sure user supplied flags are target expected. */
- target_fd = attr->link_create.target_fd;
- if (attr->link_create.flags != tinfo->reg_info->req_linfo)
- return -EINVAL;
- if (!attr->link_create.flags && target_fd)
- return -EINVAL;
-
link = kzalloc(sizeof(*link), GFP_USER | __GFP_NOWARN);
if (!link)
return -ENOMEM;
@@ -431,28 +444,15 @@ int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
return err;
}
- if (tinfo->reg_info->req_linfo == BPF_ITER_LINK_MAP_FD) {
- map = bpf_map_get_with_uref(target_fd);
- if (IS_ERR(map)) {
- err = PTR_ERR(map);
- goto cleanup_link;
- }
-
- aux.map = map;
- err = tinfo->reg_info->check_target(prog, &aux);
+ if (tinfo->reg_info->attach_target) {
+ err = tinfo->reg_info->attach_target(prog, &linfo, &link->aux);
if (err) {
- bpf_map_put_with_uref(map);
- goto cleanup_link;
+ bpf_link_cleanup(&link_primer);
+ return err;
}
-
- link->aux.map = map;
}
return bpf_link_settle(&link_primer);
-
-cleanup_link:
- bpf_link_cleanup(&link_primer);
- return err;
}
static void init_seq_meta(struct bpf_iter_priv_data *priv_data,
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index bde93344164d..ed0b3578867c 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -1966,7 +1966,7 @@ void bpf_prog_array_delete_safe(struct bpf_prog_array *array,
* @index: the index of the program to replace
*
* Skips over dummy programs, by not counting them, when calculating
- * the the position of the program to replace.
+ * the position of the program to replace.
*
* Return:
* * 0 - Success
diff --git a/kernel/bpf/map_iter.c b/kernel/bpf/map_iter.c
index fbe1f557cb88..af86048e5afd 100644
--- a/kernel/bpf/map_iter.c
+++ b/kernel/bpf/map_iter.c
@@ -98,12 +98,21 @@ static struct bpf_iter_reg bpf_map_reg_info = {
.seq_info = &bpf_map_seq_info,
};
-static int bpf_iter_check_map(struct bpf_prog *prog,
- struct bpf_iter_aux_info *aux)
+static int bpf_iter_attach_map(struct bpf_prog *prog,
+ union bpf_iter_link_info *linfo,
+ struct bpf_iter_aux_info *aux)
{
u32 key_acc_size, value_acc_size, key_size, value_size;
- struct bpf_map *map = aux->map;
+ struct bpf_map *map;
bool is_percpu = false;
+ int err = -EINVAL;
+
+ if (!linfo->map.map_fd)
+ return -EBADF;
+
+ map = bpf_map_get_with_uref(linfo->map.map_fd);
+ if (IS_ERR(map))
+ return PTR_ERR(map);
if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH ||
map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
@@ -112,7 +121,7 @@ static int bpf_iter_check_map(struct bpf_prog *prog,
else if (map->map_type != BPF_MAP_TYPE_HASH &&
map->map_type != BPF_MAP_TYPE_LRU_HASH &&
map->map_type != BPF_MAP_TYPE_ARRAY)
- return -EINVAL;
+ goto put_map;
key_acc_size = prog->aux->max_rdonly_access;
value_acc_size = prog->aux->max_rdwr_access;
@@ -122,10 +131,22 @@ static int bpf_iter_check_map(struct bpf_prog *prog,
else
value_size = round_up(map->value_size, 8) * num_possible_cpus();
- if (key_acc_size > key_size || value_acc_size > value_size)
- return -EACCES;
+ if (key_acc_size > key_size || value_acc_size > value_size) {
+ err = -EACCES;
+ goto put_map;
+ }
+ aux->map = map;
return 0;
+
+put_map:
+ bpf_map_put_with_uref(map);
+ return err;
+}
+
+static void bpf_iter_detach_map(struct bpf_iter_aux_info *aux)
+{
+ bpf_map_put_with_uref(aux->map);
}
DEFINE_BPF_ITER_FUNC(bpf_map_elem, struct bpf_iter_meta *meta,
@@ -133,8 +154,8 @@ DEFINE_BPF_ITER_FUNC(bpf_map_elem, struct bpf_iter_meta *meta,
static const struct bpf_iter_reg bpf_map_elem_reg_info = {
.target = "bpf_map_elem",
- .check_target = bpf_iter_check_map,
- .req_linfo = BPF_ITER_LINK_MAP_FD,
+ .attach_target = bpf_iter_attach_map,
+ .detach_target = bpf_iter_detach_map,
.ctx_arg_info_size = 2,
.ctx_arg_info = {
{ offsetof(struct bpf_iter__bpf_map_elem, key),
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 2f343ce15747..86299a292214 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -3883,7 +3883,7 @@ static int tracing_bpf_link_attach(const union bpf_attr *attr, struct bpf_prog *
return -EINVAL;
}
-#define BPF_LINK_CREATE_LAST_FIELD link_create.flags
+#define BPF_LINK_CREATE_LAST_FIELD link_create.iter_info_len
static int link_create(union bpf_attr *attr)
{
enum bpf_prog_type ptype;
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index b6ccfce3bf4c..ef938f17b944 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -8294,7 +8294,7 @@ static bool stacksafe(struct bpf_func_state *old,
if (old->stack[spi].slot_type[i % BPF_REG_SIZE] !=
cur->stack[spi].slot_type[i % BPF_REG_SIZE])
/* Ex: old explored (safe) state has STACK_SPILL in
- * this stack slot, but current has has STACK_MISC ->
+ * this stack slot, but current has STACK_MISC ->
* this verifier states are not equivalent,
* return false to continue verification of this path
*/
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index cb91ef902cc4..a8d4f253ed77 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -383,7 +383,7 @@ static DEFINE_RAW_SPINLOCK(trace_printk_lock);
#define BPF_TRACE_PRINTK_SIZE 1024
-static inline __printf(1, 0) int bpf_do_trace_printk(const char *fmt, ...)
+static __printf(1, 0) int bpf_do_trace_printk(const char *fmt, ...)
{
static char buf[BPF_TRACE_PRINTK_SIZE];
unsigned long flags;