Ziyang Xuan 6a4480c5e6 hsr: Fix uninit-value access in fill_frame_info() ... [ Upstream commit 484b4833c6 ] Syzbot reports the following uninit-value access problem. ===================================================== BUG: KMSAN: uninit-value in fill_frame_info net/hsr/hsr_forward.c:601 [inline] BUG: KMSAN: uninit-value in hsr_forward_skb+0x9bd/0x30f0 net/hsr/hsr_forward.c:616 fill_frame_info net/hsr/hsr_forward.c:601 [inline] hsr_forward_skb+0x9bd/0x30f0 net/hsr/hsr_forward.c:616 hsr_dev_xmit+0x192/0x330 net/hsr/hsr_device.c:223 __netdev_start_xmit include/linux/netdevice.h:4889 [inline] netdev_start_xmit include/linux/netdevice.h:4903 [inline] xmit_one net/core/dev.c:3544 [inline] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3560 __dev_queue_xmit+0x34d0/0x52a0 net/core/dev.c:4340 dev_queue_xmit include/linux/netdevice.h:3082 [inline] packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3087 [inline] packet_sendmsg+0x8b1d/0x9f30 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] __sys_sendto+0x781/0xa30 net/socket.c:2176 __do_sys_sendto net/socket.c:2188 [inline] __se_sys_sendto net/socket.c:2184 [inline] __ia32_sys_sendto+0x11f/0x1c0 net/socket.c:2184 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523 kmalloc_reserve+0x148/0x470 net/core/skbuff.c:559 __alloc_skb+0x318/0x740 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6299 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2794 packet_alloc_skb net/packet/af_packet.c:2936 [inline] packet_snd net/packet/af_packet.c:3030 [inline] packet_sendmsg+0x70e8/0x9f30 net/packet/af_packet.c:3119 sock_sendmsg_nosec net/socket.c:730 [inline] sock_sendmsg net/socket.c:753 [inline] __sys_sendto+0x781/0xa30 net/socket.c:2176 __do_sys_sendto net/socket.c:2188 [inline] __se_sys_sendto net/socket.c:2184 [inline] __ia32_sys_sendto+0x11f/0x1c0 net/socket.c:2184 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 It is because VLAN not yet supported in hsr driver. Return error when protocol is ETH_P_8021Q in fill_frame_info() now to fix it. Fixes: 451d8123f8 ("net: prp: add packet handling support") Reported-by: syzbot+bf7e6250c7ce248f3ec9@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=bf7e6250c7ce248f3ec9 Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-09-19 12:23:03 +02:00
..
Kconfig	hsr: enhance netlink socket interface to support PRP	2020-07-27 12:20:40 -07:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
hsr_debugfs.c	/net/hsr: fix misspellings using codespell tool	2021-03-18 19:13:41 -07:00
hsr_device.c	hsr: Synchronize sending frames to have always incremented outgoing seq nr.	2022-12-31 13:14:15 +01:00
hsr_device.h	net: hsr: add offloading support	2021-02-11 13:24:44 -08:00
hsr_forward.c	hsr: Fix uninit-value access in fill_frame_info()	2023-09-19 12:23:03 +02:00
hsr_forward.h	net: hsr: fix mac_len checks	2021-05-24 14:10:28 -07:00
hsr_framereg.c	hsr: ratelimit only when errors are printed	2023-04-05 11:25:02 +02:00
hsr_framereg.h	hsr: Synchronize sequence number updates.	2022-12-31 13:14:15 +01:00
hsr_main.c	net: use eth_hw_addr_set() instead of ether_addr_copy()	2022-08-31 17:16:37 +02:00
hsr_main.h	net: hsr: fix mac_len checks	2021-05-24 14:10:28 -07:00
hsr_netlink.c	genetlink: move to smaller ops wherever possible	2020-10-02 19:11:11 -07:00
hsr_netlink.h	hsr: enhance netlink socket interface to support PRP	2020-07-27 12:20:40 -07:00
hsr_slave.c	net: hsr: fix mac_len checks	2021-05-24 14:10:28 -07:00
hsr_slave.h	net: prp: add packet handling support	2020-07-27 12:20:40 -07:00