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linux-brain/net
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Alexander Lobakin 5a3890bad3 skbuff: back tiny skbs with kmalloc() in __netdev_alloc_skb() too 
commit 66c556025d687dbdd0f748c5e1df89c977b6c02a upstream.

Commit 3226b158e67c ("net: avoid 32 x truesize under-estimation for
tiny skbs") ensured that skbs with data size lower than 1025 bytes
will be kmalloc'ed to avoid excessive page cache fragmentation and
memory consumption.
However, the fix adressed only __napi_alloc_skb() (primarily for
virtio_net and napi_get_frags()), but the issue can still be achieved
through __netdev_alloc_skb(), which is still used by several drivers.
Drivers often allocate a tiny skb for headers and place the rest of
the frame to frags (so-called copybreak).
Mirror the condition to __netdev_alloc_skb() to handle this case too.

Since v1 [0]:
 - fix "Fixes:" tag;
 - refine commit message (mention copybreak usecase).

[0] https://lore.kernel.org/netdev/20210114235423.232737-1-alobakin@pm.me

Fixes: a1c7fff7e1 ("net: netdev_alloc_skb() use build_skb()")
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Link: https://lore.kernel.org/r/20210115150354.85967-1-alobakin@pm.me
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-27 11:47:53 +01:00
..
6lowpan 6lowpan: no need to check return value of debugfs_create functions 2019-07-06 12:50:01 +02:00
9p net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid 2020-11-05 11:43:20 +01:00
802 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
8021q net: vlan: avoid leaks on register_vlan_dev() failures 2021-01-17 14:05:31 +01:00
appletalk appletalk: Fix atalk_proc_init() return path 2020-08-11 15:33:40 +02:00
atm atm: fix a memory leak of vcc->user_back 2020-10-01 13:17:58 +02:00
ax25 AX.25: Prevent integer overflows in connect and sendmsg 2020-07-31 18:39:31 +02:00
batman-adv batman-adv: set .owner to THIS_MODULE 2020-12-02 08:49:50 +01:00
bluetooth Bluetooth: Fix null pointer dereference in hci_event_packet() 2020-12-30 11:51:05 +01:00
bpf bpf/flow_dissector: support flags in BPF_PROG_TEST_RUN 2019-07-25 18:00:41 -07:00
bpfilter net/bpfilter: remove superfluous testing message 2020-04-21 09:04:53 +02:00
bridge bridge: Fix a deadlock when enabling multicast snooping 2020-12-21 13:27:04 +01:00
caif net: use skb_queue_empty_lockless() in poll() handlers 2019-10-28 13:33:41 -07:00
can can: af_can: can_rx_unregister(): remove WARN() statement from list operation sanity check 2020-12-11 13:23:32 +01:00
ceph libceph: clear con->out_msg on Policy::stateful_server faults 2020-11-05 11:43:34 +01:00
core skbuff: back tiny skbs with kmalloc() in __netdev_alloc_skb() too 2021-01-27 11:47:53 +01:00
dcb net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands 2021-01-23 15:57:59 +01:00
dccp dccp: Fix possible memleak in dccp_init and dccp_fini 2020-06-17 16:40:32 +02:00
decnet net: add bool confirm_neigh parameter for dst_ops.update_pmtu 2020-01-04 19:18:58 +01:00
dns_resolver KEYS: Don't write out to userspace while holding key semaphore 2020-04-23 10:36:45 +02:00
dsa dsa: Allow forwarding of redirected IGMP traffic 2020-09-23 12:40:33 +02:00
ethernet net: add annotations on hh->hh_len lockless accesses 2020-01-09 10:20:06 +01:00
hsr hsr: check protocol version in hsr_newlink() 2020-04-21 09:04:44 +02:00
ieee802154 nl802154: add missing attribute validation for dev_type 2020-03-18 07:17:44 +01:00
ife net: Fix Kconfig indentation 2019-09-26 08:56:17 +02:00
ipv4 netfilter: rpfilter: mask ecn bits before fib lookup 2021-01-27 11:47:52 +01:00
ipv6 net: sit: unregister_netdevice on newlink's error path 2021-01-23 15:57:59 +01:00
iucv net/af_iucv: set correct sk_protocol for child sockets 2020-12-08 10:40:23 +01:00
kcm kcm: disable preemption in kcm_parse_func_strparser() 2019-09-27 10:27:14 +02:00
key af_key: pfkey_dump needs parameter validation 2020-09-26 18:03:10 +02:00
l2tp l2tp: remove skb_dst_set() from l2tp_xmit_skb() 2020-07-22 09:32:47 +02:00
l3mdev ipv6: convert major tx path to use RT6_LOOKUP_F_DST_NOREF 2019-06-23 13:24:17 -07:00
lapb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-17 20:20:36 -07:00
llc net: silence data-races on sk_backlog.tail 2020-10-01 13:17:15 +02:00
mac80211 mac80211: check if atf has been disabled in __ieee80211_schedule_txq 2021-01-23 15:58:00 +01:00
mac802154 mac802154: tx: fix use-after-free 2020-10-01 13:18:17 +02:00
mpls net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup 2019-12-18 16:08:42 +01:00
ncsi net/ncsi: Use real net-device for response handler 2021-01-12 20:16:13 +01:00
netfilter netfilter: nft_compat: remove flush counter optimization 2021-01-19 18:26:19 +01:00
netlabel netlabel: fix an uninitialized warning in netlbl_unlabel_staticlist() 2020-11-24 13:28:57 +01:00
netlink genetlink: remove genl_bind 2020-07-22 09:32:46 +02:00
netrom net: netrom: Fix potential nr_neigh refcnt leak in nr_add_node 2020-04-29 16:33:08 +02:00
nfc nfc: Ensure presence of NFC_ATTR_FIRMWARE_NAME attribute in nfc_genl_fw_download() 2020-10-29 09:57:26 +01:00
nsh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
openvswitch net: openvswitch: ensure LSE is pullable before reading it 2020-12-08 10:40:27 +01:00
packet net/packet: fix overflow in tpacket_rcv 2020-09-09 19:12:29 +02:00
phonet net: use skb_queue_empty_lockless() in poll() handlers 2019-10-28 13:33:41 -07:00
psample net: psample: fix skb_over_panic 2019-12-04 22:30:54 +01:00
qrtr net: qrtr: check skb_put_padto() return value 2020-09-26 18:03:15 +02:00
rds rds: Prevent kernel-infoleak in rds_notify_queue_get() 2020-08-05 09:59:44 +02:00
rfkill rfkill: Fix use-after-free in rfkill_resume() 2020-11-24 13:29:05 +01:00
rose rose: Fix Null pointer dereference in rose_send_frame() 2020-12-08 10:40:23 +01:00
rxrpc rxrpc: Fix handling of an unsupported token type in rxrpc_read() 2021-01-23 15:58:00 +01:00
sched net/sched: sch_taprio: ensure to reset/destroy all child qdiscs 2021-01-12 20:16:16 +01:00
sctp net, sctp, filter: remap copy_from_user failure error 2021-01-23 15:58:00 +01:00
smc net/smc: fix direct access to ib_gid_addr->ndev in smc_ib_determine_gid() 2020-11-24 13:28:58 +01:00
strparser Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-22 08:59:24 -04:00
sunrpc net: sunrpc: interpret the return value of kstrtou32 correctly 2021-01-19 18:26:18 +01:00
switchdev treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
tipc tipc: fix NULL deref in tipc_link_xmit() 2021-01-23 15:58:00 +01:00
tls net/tls: Protect from calling tls_dev_del for TLS RX twice 2020-12-08 10:40:23 +01:00
unix skbuff: fix a data race in skb_queue_len() 2020-10-01 13:17:31 +02:00
vmw_vsock vsock: use ns_capable_noaudit() on socket create 2020-11-10 12:37:30 +01:00
wimax wimax: no need to check return value of debugfs_create functions 2019-08-10 15:25:47 -07:00
wireless cfg80211: initialize rekey_data 2020-12-30 11:51:29 +01:00
x25 net/x25: prevent a couple of overflows 2020-12-08 10:40:26 +01:00
xdp xsk: Replace datagram_poll by sock_poll_wait 2020-12-30 11:50:53 +01:00
xfrm net: xfrm: fix a race condition during allocing spi 2020-11-18 19:20:17 +01:00
compat.c net/compat: Add missing sock updates for SCM_RIGHTS 2020-08-21 13:05:25 +02:00
Kconfig net: Fix CONFIG_NET_CLS_ACT=n and CONFIG_NFT_FWD_NETDEV={y, m} build 2020-04-01 11:02:18 +02:00
Makefile net: split out functions related to registering inflight socket files 2019-02-28 08:24:23 -07:00
socket.c net: Set fput_needed iff FDPUT_FPUT is set 2020-08-19 08:16:22 +02:00
sysctl_net.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00