linux/net
Linus Torvalds 4e60e85129 net: use put_user() for msghdr results written back to user space
____sys_recvmsg() writes msg_flags and msg_controllen back with
__put_user(), and the compat sendmmsg()/recvmmsg() loops write msg_len
the same way.  None of these has an access_ok() of its own: they rely on
the earlier copy_from_user() of the message header having checked the
range.  For the compat msg_len that is not even true, since msg_len
lives after the compat_msghdr that was copied.  It is only safe because
compat pointers are 32-bit.  The native mmsg paths already use
put_user().

Use put_user() everywhere.  On x86 that adds a couple of instructions to
check the address, on a path that has to enable and disable user access
for each write anyway.

This is part of getting rid of __get_user() and __put_user() entirely.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-10-19 19:23:33 -10:00
..
6lowpan net: 6lowpan: fix mismatched comments 2026-09-02 09:03:06 +02:00
9p
802
8021q vlan: ensure sufficient headroom in vlan_dev_hard_header() 2026-09-24 11:00:59 -07:00
atm pppoatm: ensure a writable skb header and linear data 2026-09-15 17:07:01 -07:00
batman-adv treewide: refresh kmalloc_obj() conversions 2026-09-04 21:37:00 -07:00
bluetooth Bluetooth: ISO: Serialize concurrent connect calls 2026-10-05 13:10:47 -04:00
bpf bpf: Use kvfree() in xdp_test_run_teardown() 2026-09-12 12:11:41 -07:00
bridge ipv4: validate checksum_start before completing checksum 2026-10-08 11:03:47 -07:00
can can: fix unique skb identifier regression under RPS 2026-10-01 17:05:03 +02:00
ceph libceph: remove pinning assertion in ceph_msg_data_iter_next() 2026-09-02 12:23:05 +02:00
core net: skbuff: don't leave stale bytes in skb_copy_and_csum_bits() 2026-10-08 10:57:41 -07:00
dcb
devlink devlink: fix devlink_rel reference leak when notify work is pending 2026-10-06 17:16:14 -07:00
dns_resolver keys, dns: Drop unused NUL terminator from upayload->data 2026-08-10 16:20:42 -07:00
dsa net: dsa: tag_brcm: legacy FCS: request needed tailroom 2026-09-09 13:31:08 -07:00
ethernet
ethtool net: ethtool: let tsconfig reach a PHY-only timestamp provider 2026-09-28 19:26:41 -07:00
handshake
hsr net: hsr: enable promiscuous mode on interlink port with fwd offload 2026-09-10 08:45:00 -07:00
ieee802154 ieee802154: 6lowpan: fix NULL dereference in lowpan_newlink 2026-09-02 09:54:27 +02:00
ife net/sched: act_ife: Only operate on Ethernet frames 2026-08-24 11:59:59 -07:00
ipv4 ipv4: do not warn on route notification size race 2026-10-08 11:32:36 -07:00
ipv6 calipso: keep BIG TCP payload_len in calipso_skbuff_setattr() 2026-10-15 12:50:03 +02:00
iucv net/iucv: fix the recvmsg window update 2026-08-31 15:51:22 -07:00
kcm net: kcm: Hold RCU read lock while running BPF parser 2026-08-17 13:43:58 -07:00
key
l2tp net: l2tp: do not propagate multicast notification errors 2026-08-24 11:43:28 -07:00
l3mdev
lapb
llc llc: fix skb UAF and leaks on llc_mac_hdr_init() failure 2026-09-24 11:00:59 -07:00
mac80211 wifi: mac80211: don't estimate airtime for unsupported rate widths 2026-10-07 12:46:15 +02:00
mac802154 mac802154: fix use-after-free of sdata via queued RX frames 2026-09-03 11:00:54 +02:00
mctp net/mctp: publish the mctp_dev only after it is initialised 2026-09-25 16:34:40 -07:00
mpls Summary 2026-08-20 08:46:41 -07:00
mptcp mptcp: fix bad accounting in __mptcp_subflow_push_pending() 2026-09-17 08:14:33 -07:00
ncsi
netfilter ipv4: validate checksum_start before completing checksum 2026-10-08 11:03:47 -07:00
netlabel
netlink netlink: avoid hashing the network namespace pointer 2026-10-15 10:27:45 +02:00
nfc nfc: llcp: fix slab-out-of-bounds reads when logging service names 2026-09-23 22:13:17 +02:00
nsh
openvswitch net: openvswitch: validate transport header presence in set_ipv6_addr 2026-10-08 11:33:38 -07:00
packet net/packet: call packet_parse_headers after virtio_net_hdr_to_skb 2026-10-08 10:59:20 -07:00
phonet
psample
psp net: psp: avoid conflicts with skb->decrypted and sk_validate_xmit_skb() 2026-09-16 19:18:24 -07:00
qrtr net: qrtr: resend HELLO on MHI resume 2026-09-20 11:21:10 -07:00
rds net/rds: don't let the rdma_cm destroy an id RDS still owns on route failure 2026-10-12 18:12:03 +02:00
rfkill
rxrpc treewide: refresh kmalloc_obj() conversions 2026-09-04 21:37:00 -07:00
sched net/sched: fix use-after-free in __tcf_action_put() 2026-10-15 13:00:02 +02:00
sctp sctp: revalidate output stream after association connect wait 2026-10-13 10:28:23 +02:00
shaper
smc net/smc: protect clcsock lifetime in smc_getname 2026-10-08 11:33:12 -07:00
strparser strparser: make sure __strp_recv isn't running before tearing down the parser 2026-10-06 18:29:12 -07:00
sunrpc treewide: refresh kmalloc_obj() conversions 2026-09-04 21:37:00 -07:00
switchdev
tipc tipc: destroy topsrv workqueues before closing connections 2026-10-02 08:20:15 +01:00
tls tls: device: fix out-of-bounds write in tls_append_frag() 2026-08-25 10:04:02 +02:00
unix af_unix: Unify scc_index when finalising SCC in __unix_walk_scc(). 2026-09-15 16:45:05 -07:00
vmw_vsock vsock: treat TCP_CLOSING as once-established 2026-10-12 16:55:20 +02:00
wireless wifi: cfg80211: preserve hidden-group beacon IE ownership 2026-09-22 10:47:54 +02:00
x25
xdp xsk: Use a 32-bit compare in xsk_map_gen_lookup 2026-09-17 10:56:16 -07:00
xfrm ipv4: validate checksum_start before completing checksum 2026-10-08 11:03:47 -07:00
compat.c net: af_unix: useful handling of LSM denials on SCM_RIGHTS 2026-08-17 18:14:52 -07:00
devres.c
Kconfig
Kconfig.debug
Makefile
socket.c net: use put_user() for msghdr results written back to user space 2026-10-19 19:23:33 -10:00
sysctl_net.c net: enforce net sysctl registration 2026-08-13 13:12:21 +02:00