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4ef9274362
linux-yocto/net
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Eric Dumazet 4ef9274362 bpf: Add bpf_prog_run_data_pointers() 
syzbot found that cls_bpf_classify() is able to change
tc_skb_cb(skb)->drop_reason triggering a warning in sk_skb_reason_drop().

WARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 __sk_skb_reason_drop net/core/skbuff.c:1189 [inline]
WARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 sk_skb_reason_drop+0x76/0x170 net/core/skbuff.c:1214

struct tc_skb_cb has been added in commit ec624fe740 ("net/sched:
Extend qdisc control block with tc control block"), which added a wrong
interaction with db58ba4592 ("bpf: wire in data and data_end for
cls_act_bpf").

drop_reason was added later.

Add bpf_prog_run_data_pointers() helper to save/restore the net_sched
storage colliding with BPF data_meta/data_end.

Fixes: ec624fe740 ("net/sched: Extend qdisc control block with tc control block")
Reported-by: syzbot <syzkaller@googlegroups.com>
Closes: https://lore.kernel.org/netdev/6913437c.a70a0220.22f260.013b.GAE@google.com/
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20251112125516.1563021-1-edumazet@google.com
2025-11-14 08:56:49 -08:00
..
6lowpan net: replace ND_PRINTK with dynamic debug 2025-07-10 15:27:32 -07:00
9p 9p/trans_fd: p9_fd_request: kick rx thread if EPOLLIN 2025-09-19 16:34:51 +09:00
802 treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
8021q net: s/dev_close_many/netif_close_many/ 2025-07-18 17:27:47 -07:00
appletalk Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-07-24 11:10:46 -07:00
atm net: atm: fix memory leak in atm_register_sysfs when device_register fail 2025-09-04 09:53:44 +02:00
ax25 ax25: properly unshare skbs in ax25_kiss_rcv() 2025-09-03 17:06:30 -07:00
batman-adv Here is a batman-adv bugfix: 2025-10-27 18:00:54 -07:00
bluetooth Bluetooth: rfcomm: fix modem control handling 2025-10-24 10:32:19 -04:00
bpf bpf: Do not disable preemption in bpf_test_run(). 2025-10-17 11:29:35 -07:00
bridge bridge: br_vlan_fill_forward_path_pvid: use br_vlan_group_rcu() 2025-10-08 13:17:31 +02:00
caif caif: Replace memset(0) + strscpy() with strscpy_pad() 2025-08-12 14:08:56 -07:00
can can: j1939: add missing calls in NETDEV_UNREGISTER notification handler 2025-10-13 21:26:31 +02:00
ceph Some messenger improvements from Eric and Max, a patch to address the 2025-10-10 11:30:19 -07:00
core bpf-fixes 2025-10-31 18:22:26 -07:00
dcb Revert "Documentation: net: add flow control guide and document ethtool API" 2025-10-01 09:48:21 +02:00
devlink net: replace use of system_wq with system_percpu_wq 2025-09-22 17:40:30 -07:00
dns_resolver
dsa net: s/dev_close_many/netif_close_many/ 2025-07-18 17:27:47 -07:00
ethernet ethernet: Extend device_get_mac_address() to use NVMEM 2025-09-15 18:34:08 -07:00
ethtool Revert "Documentation: net: add flow control guide and document ethtool API" 2025-10-01 09:48:21 +02:00
handshake net/handshake: Add new parameter 'HANDSHAKE_A_ACCEPT_KEYRING' 2025-07-08 15:31:44 +02:00
hsr net: hsr: prevent creation of HSR device with slaves from another netns 2025-10-22 19:22:22 -07:00
ieee802154 treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
ife
ipv4 tcp: fix too slow tcp_rcvbuf_grow() action 2025-10-29 17:30:19 -07:00
ipv6 net/ip6_tunnel: Prevent perpetual tunnel growth 2025-10-13 17:43:46 -07:00
iucv net: add sk_drops_read(), sk_drops_inc() and sk_drops_reset() helpers 2025-08-28 13:14:50 +02:00
kcm net: kcm: Fix race condition in kcm_unattach() 2025-08-13 18:18:33 -07:00
key Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-07-24 11:10:46 -07:00
l2tp l2tp: do not use sock_hold() in pppol2tp_session_get_sock() 2025-08-27 17:16:13 -07:00
l3mdev
lapb treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
llc net: make sk->sk_rcvtimeo lockless 2025-06-23 17:05:12 -07:00
mac80211 wifi: mac80211: fix key tailroom accounting leak 2025-10-20 13:57:10 +02:00
mac802154
mctp net: mctp: fix typo in comment 2025-09-08 17:47:57 -07:00
mpls net: s/dev_get_flags/netif_get_flags/ 2025-07-18 17:27:47 -07:00
mptcp mptcp: Fix proto fallback detection with BPF 2025-11-13 13:11:15 -08:00
ncsi net: ncsi: Fix buffer overflow in fetching version id 2025-06-12 18:21:59 -07:00
netfilter netfilter: nft_ct: add seqadj extension for natted connections 2025-10-29 14:47:59 +01:00
netlabel audit: add record for multiple task security contexts 2025-08-30 10:15:30 -04:00
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-09-11 17:40:13 -07:00
netrom treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
nfc net: nfc: nci: Add parameter validation for packet data 2025-09-30 10:27:14 +02:00
nsh
openvswitch net: replace use of system_wq with system_percpu_wq 2025-09-22 17:40:30 -07:00
packet net: af_packet: Use hrtimer to do the retire operation 2025-09-11 18:40:06 -07:00
phonet net: add sk_drops_read(), sk_drops_inc() and sk_drops_reset() helpers 2025-08-28 13:14:50 +02:00
psample
psp net: psp: don't assume reply skbs will have a socket 2025-10-03 10:23:50 -07:00
qrtr
rds net: WQ_PERCPU added to alloc_workqueue users 2025-09-22 17:40:30 -07:00
rfkill net: replace use of system_wq with system_percpu_wq 2025-09-22 17:40:30 -07:00
rose net: rose: fix a typo in rose_clear_routes() 2025-08-27 17:27:52 -07:00
rxrpc net: WQ_PERCPU added to alloc_workqueue users 2025-09-22 17:40:30 -07:00
sched bpf: Add bpf_prog_run_data_pointers() 2025-11-14 08:56:49 -08:00
sctp net: sctp: fix KMSAN uninit-value in sctp_inq_pop 2025-10-30 11:21:05 +01:00
shaper
smc net/smc: fix general protection fault in __smc_diag_dump 2025-10-20 17:46:06 -07:00
strparser net: make sk->sk_rcvtimeo lockless 2025-06-23 17:05:12 -07:00
sunrpc NFSD 6.18 Release Notes 2025-10-06 13:22:21 -07:00
switchdev
tipc net: doc: Fix typos in docs 2025-10-03 10:24:14 -07:00
tls net: tls: Cancel RX async resync request on rcd_delta overflow 2025-10-29 18:32:18 -07:00
unix Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
vmw_vsock vsock: fix lock inversion in vsock_assign_transport() 2025-10-23 16:07:58 +02:00
wireless wifi: nl80211: call kfree without a NULL check 2025-10-20 13:57:26 +02:00
x25 net/x25: Remove unused x25_terminate_link() 2025-07-14 17:19:13 -07:00
xdp xsk: Harden userspace-supplied xdp_desc validation 2025-10-10 10:07:48 -07:00
xfrm espintcp: use datagram_poll_queue for socket readiness 2025-10-23 15:46:04 +02:00
compat.c
devres.c
Kconfig dibs: Create drivers/dibs 2025-09-23 11:13:21 +02:00
Kconfig.debug
Makefile psp: base PSP device support 2025-09-18 12:32:06 +02:00
socket.c Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
sysctl_net.c