KMSAN: uninit-value in hwsim_cloned_frame_received

KMSAN: uninit-value in hwsim_cloned_frame_received_nl
Status: upstream: reported C repro on 2020/09/24 09:26
Reported-by: syzbot+b2645b5bf1512b81fa22@syzkaller.appspotmail.com
First crash: 33d, last: 45m

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2020/09/30 08:43	14m	anmol.karan123@gmail.com		https://github.com/google/kmsan.git master	report log

Sample crash report:

=====================================================
BUG: KMSAN: uninit-value in hwsim_cloned_frame_received_nl+0x104e/0x13e0 drivers/net/wireless/mac80211_hwsim.c:3553
CPU: 0 PID: 8533 Comm: syz-executor398 Not tainted 5.9.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:219
 hwsim_cloned_frame_received_nl+0x104e/0x13e0 drivers/net/wireless/mac80211_hwsim.c:3553
 genl_family_rcv_msg_doit net/netlink/genetlink.c:669 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:714 [inline]
 genl_rcv_msg+0x1703/0x18a0 net/netlink/genetlink.c:731
 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2470
 genl_rcv+0x63/0x80 net/netlink/genetlink.c:742
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 __sys_sendto+0x9dc/0xc80 net/socket.c:1992
 __do_sys_sendto net/socket.c:2004 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:2000
 __x64_sys_sendto+0x6e/0x90 net/socket.c:2000
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x401a73
Code: ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb cd 66 0f 1f 44 00 00 83 3d bd 8c 2d 00 00 75 17 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 f1 0b 00 00 c3 48 83 ec 08 e8 57 01 00 00
RSP: 002b:00007fffb168f498 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fffb168f510 RCX: 0000000000401a73
RDX: 0000000000000034 RSI: 00007fffb168f560 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fffb168f4a0 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fffb168f560 R15: 0000000000000003

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:143 [inline]
 kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:126
 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80
 slab_alloc_node mm/slub.c:2907 [inline]
 __kmalloc_node_track_caller+0x9aa/0x12f0 mm/slub.c:4511
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0x35f/0xb30 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1094 [inline]
 hwsim_cloned_frame_received_nl+0x20e/0x13e0 drivers/net/wireless/mac80211_hwsim.c:3498
 genl_family_rcv_msg_doit net/netlink/genetlink.c:669 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:714 [inline]
 genl_rcv_msg+0x1703/0x18a0 net/netlink/genetlink.c:731
 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2470
 genl_rcv+0x63/0x80 net/netlink/genetlink.c:742
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 __sys_sendto+0x9dc/0xc80 net/socket.c:1992
 __do_sys_sendto net/socket.c:2004 [inline]
 __se_sys_sendto+0x107/0x130 net/socket.c:2000
 __x64_sys_sendto+0x6e/0x90 net/socket.c:2000
 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================

Crashes (453):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Maintainers
ci-upstream-kmsan-gce	2020/09/26 23:29	https://github.com/google/kmsan.git master	c5a13b33	2d5ea0cb	.config	log	report	syz	C		davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/09/22 22:06	https://github.com/google/kmsan.git master	c5a13b33	3e8f6c27	.config	log	report	syz	C		davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/21 01:52	https://github.com/google/kmsan.git master	e1617422	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/20 22:38	https://github.com/google/kmsan.git master	e1617422	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/20 10:11	https://github.com/google/kmsan.git master	e67f4ba8	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/19 23:57	https://github.com/google/kmsan.git master	e67f4ba8	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/19 14:36	https://github.com/google/kmsan.git master	e67f4ba8	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/19 12:42	https://github.com/google/kmsan.git master	e67f4ba8	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/19 11:38	https://github.com/google/kmsan.git master	e67f4ba8	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/19 05:22	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/18 20:13	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/18 08:55	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/18 00:43	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/17 22:54	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/17 05:24	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/17 02:34	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/16 16:06	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/16 12:08	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/10/16 00:47	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce	2020/09/22 17:44	https://github.com/google/kmsan.git master	c5a13b33	3e8f6c27	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/26 11:33	https://github.com/google/kmsan.git master	e1617422	a7aac492	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/26 09:22	https://github.com/google/kmsan.git master	e1617422	a1839e81	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/26 07:47	https://github.com/google/kmsan.git master	e1617422	a1839e81	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/26 05:08	https://github.com/google/kmsan.git master	e1617422	a1839e81	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/25 19:19	https://github.com/google/kmsan.git master	e1617422	a1839e81	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/25 15:59	https://github.com/google/kmsan.git master	e1617422	a1839e81	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/25 11:11	https://github.com/google/kmsan.git master	e1617422	a1839e81	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/25 01:06	https://github.com/google/kmsan.git master	e1617422	a1839e81	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/24 20:19	https://github.com/google/kmsan.git master	e1617422	a1839e81	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/23 13:34	https://github.com/google/kmsan.git master	e1617422	4e740c00	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/23 11:37	https://github.com/google/kmsan.git master	e1617422	4e740c00	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/23 04:43	https://github.com/google/kmsan.git master	e1617422	4e740c00	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/22 16:17	https://github.com/google/kmsan.git master	e1617422	be6b1582	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/21 21:43	https://github.com/google/kmsan.git master	e1617422	99c64d5c	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/21 04:15	https://github.com/google/kmsan.git master	e1617422	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/20 20:31	https://github.com/google/kmsan.git master	e1617422	ff4a3345	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/18 22:37	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/18 21:24	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/18 13:04	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/18 05:41	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/18 04:37	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/17 20:26	https://github.com/google/kmsan.git master	e67f4ba8	fea47c01	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/17 09:16	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/16 23:37	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/16 10:18	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/16 06:01	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kmsan-gce-386	2020/10/16 03:28	https://github.com/google/kmsan.git master	e67f4ba8	6e262c73	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org