linux-stable.git/net, branch v5.2.17

netfilter: nf_flow_table: clear skb tstamp before xmit

2019-09-21T05:18:42+00:00

[ Upstream commit de20900fbe1c4fd36de25a7a5a43223254ecf0d0 ]

If 'fq' qdisc is used and a program has requested timestamps,
skb->tstamp needs to be cleared, else fq will treat these as
'transmit time'.

Signed-off-by: Florian Westphal 
Signed-off-by: Pablo Neira Ayuso 
Signed-off-by: Sasha Levin

libceph: don't call crypto_free_sync_skcipher() on a NULL tfm

2019-09-21T05:18:39+00:00

[ Upstream commit e8c99200b4d117c340c392ebd5e62d85dfeed027 ]

In set_secret(), key->tfm is assigned to NULL on line 55, and then
ceph_crypto_key_destroy(key) is executed.

ceph_crypto_key_destroy(key)
  crypto_free_sync_skcipher(key->tfm)
    crypto_free_skcipher(&tfm->base);

This happens to work because crypto_sync_skcipher is a trivial wrapper
around crypto_skcipher: &tfm->base is still 0 and crypto_free_skcipher()
handles that.  Let's not rely on the layout of crypto_sync_skcipher.

This bug is found by a static analysis tool STCheck written by us.

Fixes: 69d6302b65a8 ("libceph: Remove VLA usage of skcipher").
Signed-off-by: Jia-Ju Bai 
Reviewed-by: Ilya Dryomov 
Signed-off-by: Ilya Dryomov 
Signed-off-by: Sasha Levin

netfilter: conntrack: make sysctls per-namespace again

2019-09-21T05:18:37+00:00

[ Upstream commit 478553fd1b6f819390b64a2e13ac756c4d1a2836 ]

When I merged the extension sysctl tables with the main one I forgot to
reset them on netns creation.  They currently read/write init_net settings.

Fixes: d912dec12428 ("netfilter: conntrack: merge acct and helper sysctl table with main one")
Fixes: cb2833ed0044 ("netfilter: conntrack: merge ecache and timestamp sysctl tables with main one")
Reported-by: Shmulik Ladkani 
Signed-off-by: Florian Westphal 
Signed-off-by: Pablo Neira Ayuso 
Signed-off-by: Sasha Levin

netfilter: nf_conntrack_ftp: Fix debug output

2019-09-21T05:18:36+00:00

[ Upstream commit 3a069024d371125227de3ac8fa74223fcf473520 ]

The find_pattern() debug output was printing the 'skip' character.
This can be a NULL-byte and messes up further pr_debug() output.

Output without the fix:
kernel: nf_conntrack_ftp: Pattern matches!
kernel: nf_conntrack_ftp: Skipped up to `<7>nf_conntrack_ftp: find_pattern `PORT': dlen = 8
kernel: nf_conntrack_ftp: find_pattern `EPRT': dlen = 8

Output with the fix:
kernel: nf_conntrack_ftp: Pattern matches!
kernel: nf_conntrack_ftp: Skipped up to 0x0 delimiter!
kernel: nf_conntrack_ftp: Match succeeded!
kernel: nf_conntrack_ftp: conntrack_ftp: match `172,17,0,100,200,207' (20 bytes at 4150681645)
kernel: nf_conntrack_ftp: find_pattern `PORT': dlen = 8

Signed-off-by: Thomas Jarosch 
Signed-off-by: Pablo Neira Ayuso 
Signed-off-by: Sasha Levin

netfilter: xt_physdev: Fix spurious error message in physdev_mt_check

2019-09-21T05:18:36+00:00

[ Upstream commit 3cf2f450fff304be9cf4868bf0df17f253bc5b1c ]

Simplify the check in physdev_mt_check() to emit an error message
only when passed an invalid chain (ie, NF_INET_LOCAL_OUT).
This avoids cluttering up the log with errors against valid rules.

For large/heavily modified rulesets, current behavior can quickly
overwhelm the ring buffer, because this function gets called on
every change, regardless of the rule that was changed.

Signed-off-by: Todd Seidelmann 
Acked-by: Florian Westphal 
Signed-off-by: Pablo Neira Ayuso 
Signed-off-by: Sasha Levin

bpf: allow narrow loads of some sk_reuseport_md fields with offset > 0

2019-09-21T05:18:34+00:00

[ Upstream commit 2c238177bd7f4b14bdf7447cc1cd9bb791f147e6 ]

test_select_reuseport fails on s390 due to verifier rejecting
test_select_reuseport_kern.o with the following message:

	; data_check.eth_protocol = reuse_md->eth_protocol;
	18: (69) r1 = *(u16 *)(r6 +22)
	invalid bpf_context access off=22 size=2

This is because on big-endian machines casts from __u32 to __u16 are
generated by referencing the respective variable as __u16 with an offset
of 2 (as opposed to 0 on little-endian machines).

The verifier already has all the infrastructure in place to allow such
accesses, it's just that they are not explicitly enabled for
eth_protocol field. Enable them for eth_protocol field by using
bpf_ctx_range instead of offsetof.

Ditto for ip_protocol, bind_inany and len, since they already allow
narrowing, and the same problem can arise when working with them.

Fixes: 2dbb9b9e6df6 ("bpf: Introduce BPF_PROG_TYPE_SK_REUSEPORT")
Signed-off-by: Ilya Leoshkevich 
Signed-off-by: Daniel Borkmann 
Signed-off-by: Sasha Levin

flow_dissector: Fix potential use-after-free on BPF_PROG_DETACH

2019-09-21T05:18:34+00:00

[ Upstream commit db38de39684dda2bf307f41797db2831deba64e9 ]

Call to bpf_prog_put(), with help of call_rcu(), queues an RCU-callback to
free the program once a grace period has elapsed. The callback can run
together with new RCU readers that started after the last grace period.
New RCU readers can potentially see the "old" to-be-freed or already-freed
pointer to the program object before the RCU update-side NULLs it.

Reorder the operations so that the RCU update-side resets the protected
pointer before the end of the grace period after which the program will be
freed.

Fixes: d58e468b1112 ("flow_dissector: implements flow dissector BPF hook")
Reported-by: Lorenz Bauer 
Signed-off-by: Jakub Sitnicki 
Acked-by: Petar Penkov 
Signed-off-by: Daniel Borkmann 
Signed-off-by: Sasha Levin

batman-adv: Only read OGM2 tvlv_len after buffer len check

2019-09-21T05:18:33+00:00

[ Upstream commit 0ff0f15a32c093381ad1abc06abe85afb561ab28 ]

Multiple batadv_ogm2_packet can be stored in an skbuff. The functions
batadv_v_ogm_send_to_if() uses batadv_v_ogm_aggr_packet() to check if there
is another additional batadv_ogm2_packet in the skb or not before they
continue processing the packet.

The length for such an OGM2 is BATADV_OGM2_HLEN +
batadv_ogm2_packet->tvlv_len. The check must first check that at least
BATADV_OGM2_HLEN bytes are available before it accesses tvlv_len (which is
part of the header. Otherwise it might try read outside of the currently
available skbuff to get the content of tvlv_len.

Fixes: 9323158ef9f4 ("batman-adv: OGMv2 - implement originators logic")
Signed-off-by: Sven Eckelmann 
Signed-off-by: Simon Wunderlich 
Signed-off-by: Sasha Levin

xdp: unpin xdp umem pages in error path

2019-09-21T05:18:31+00:00

[ Upstream commit fb89c39455e4b49881c5a42761bd71f03d3ef888 ]

Fix mem leak caused by missed unpin routine for umem pages.

Fixes: 8aef7340ae9695 ("xsk: introduce xdp_umem_page")
Signed-off-by: Ivan Khoronzhuk 
Acked-by: Jonathan Lemon 
Signed-off-by: Daniel Borkmann 
Signed-off-by: Sasha Levin

netfilter: xt_nfacct: Fix alignment mismatch in xt_nfacct_match_info

2019-09-21T05:18:29+00:00

[ Upstream commit 89a26cd4b501e9511d3cd3d22327fc76a75a38b3 ]

When running a 64-bit kernel with a 32-bit iptables binary, the size of
the xt_nfacct_match_info struct diverges.

    kernel: sizeof(struct xt_nfacct_match_info) : 40
    iptables: sizeof(struct xt_nfacct_match_info)) : 36

Trying to append nfacct related rules results in an unhelpful message.
Although it is suggested to look for more information in dmesg, nothing
can be found there.

    # iptables -A  -m nfacct --nfacct-name 
    iptables: Invalid argument. Run `dmesg' for more information.

This patch fixes the memory misalignment by enforcing 8-byte alignment
within the struct's first revision. This solution is often used in many
other uapi netfilter headers.

Signed-off-by: Juliana Rodrigueiro 
Acked-by: Florian Westphal 
Signed-off-by: Pablo Neira Ayuso 
Signed-off-by: Sasha Levin