From: syzbot <syzbot+72b99dcf4607e8c770f3@syzkaller.appspotmail.com>
To: davem@davemloft.net, glider@google.com,
johannes@sipsolutions.net, kuba@kernel.org,
linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: KMSAN: uninit-value in validate_beacon_head
Date: Wed, 02 Dec 2020 02:05:22 -0800 [thread overview]
Message-ID: <0000000000009e9aee05b5786171@google.com> (raw)
In-Reply-To: <0000000000001750e305b52c8d02@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: 73d62e81 kmsan: random: prevent boot-time reports in _mix_..
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=153d4607500000
kernel config: https://syzkaller.appspot.com/x/.config?x=eef728deea880383
dashboard link: https://syzkaller.appspot.com/bug?extid=72b99dcf4607e8c770f3
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c1cec3500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=160b6cd3500000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+72b99dcf4607e8c770f3@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in validate_beacon_head+0x51e/0x5c0 net/wireless/nl80211.c:225
CPU: 0 PID: 8275 Comm: syz-executor237 Not tainted 5.10.0-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:118
__msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197
validate_beacon_head+0x51e/0x5c0 net/wireless/nl80211.c:225
validate_nla lib/nlattr.c:544 [inline]
__nla_validate_parse+0x241a/0x4e00 lib/nlattr.c:588
__nla_parse+0x141/0x150 lib/nlattr.c:685
__nlmsg_parse include/net/netlink.h:733 [inline]
nlmsg_parse_deprecated include/net/netlink.h:772 [inline]
nl80211_prepare_wdev_dump+0x6fd/0xbb0 net/wireless/nl80211.c:891
nl80211_dump_station+0x143/0x740 net/wireless/nl80211.c:5810
netlink_dump+0xb92/0x1670 net/netlink/af_netlink.c:2268
__netlink_dump_start+0xcf1/0xea0 net/netlink/af_netlink.c:2373
genl_family_rcv_msg_dumpit net/netlink/genetlink.c:697 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:780 [inline]
genl_rcv_msg+0xff0/0x1610 net/netlink/genetlink.c:800
netlink_rcv_skb+0x70a/0x820 net/netlink/af_netlink.c:2494
genl_rcv+0x63/0x80 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
netlink_unicast+0x11da/0x14b0 net/netlink/af_netlink.c:1330
netlink_sendmsg+0x173c/0x1840 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg net/socket.c:671 [inline]
____sys_sendmsg+0xc7a/0x1240 net/socket.c:2353
___sys_sendmsg net/socket.c:2407 [inline]
__sys_sendmsg+0x6d5/0x830 net/socket.c:2440
__do_sys_sendmsg net/socket.c:2449 [inline]
__se_sys_sendmsg+0x97/0xb0 net/socket.c:2447
__x64_sys_sendmsg+0x4a/0x70 net/socket.c:2447
do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4418a9
Code: e8 fc a9 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffe906479e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004418a9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00000000006cc018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402430
R13: 00000000004024c0 R14: 0000000000000000 R15: 0000000000000000
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76
slab_alloc_node mm/slub.c:2906 [inline]
__kmalloc_node_track_caller+0xc61/0x15f0 mm/slub.c:4512
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0x309/0xae0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1094 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1176 [inline]
netlink_sendmsg+0xdb8/0x1840 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg net/socket.c:671 [inline]
____sys_sendmsg+0xc7a/0x1240 net/socket.c:2353
___sys_sendmsg net/socket.c:2407 [inline]
__sys_sendmsg+0x6d5/0x830 net/socket.c:2440
__do_sys_sendmsg net/socket.c:2449 [inline]
__se_sys_sendmsg+0x97/0xb0 net/socket.c:2447
__x64_sys_sendmsg+0x4a/0x70 net/socket.c:2447
do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
entry_SYSCALL_64_after_hwframe+0x44/0xa9
=====================================================
prev parent reply other threads:[~2020-12-02 10:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-28 15:37 KMSAN: uninit-value in validate_beacon_head syzbot
2020-12-02 10:05 ` syzbot [this message]
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