From: syzbot <syzbot+8f84cf3ec5c288e779ef@syzkaller.appspotmail.com>
To: davem@davemloft.net, glider@google.com, johan.hedberg@gmail.com,
kuba@kernel.org, linux-bluetooth@vger.kernel.org,
linux-kernel@vger.kernel.org, luiz.dentz@gmail.com,
marcel@holtmann.org, netdev@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] KMSAN: uninit-value in hci_conn_request_evt
Date: Sun, 02 Jan 2022 14:23:18 -0800 [thread overview]
Message-ID: <000000000000de69a305d4a0d958@google.com> (raw)
In-Reply-To: <000000000000f5dc0805cf7807a7@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: 81c325bbf94e kmsan: hooks: do not check memory in kmsan_in..
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=103ea4c7b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=2d8b9a11641dc9aa
dashboard link: https://syzkaller.appspot.com/bug?extid=8f84cf3ec5c288e779ef
compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10051b67b00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12148a3bb00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8f84cf3ec5c288e779ef@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in hci_proto_connect_ind include/net/bluetooth/hci_core.h:1485 [inline]
BUG: KMSAN: uninit-value in hci_conn_request_evt+0x22b/0x13c0 net/bluetooth/hci_event.c:2827
hci_proto_connect_ind include/net/bluetooth/hci_core.h:1485 [inline]
hci_conn_request_evt+0x22b/0x13c0 net/bluetooth/hci_event.c:2827
hci_event_packet+0x1452/0x23e0 net/bluetooth/hci_event.c:6360
hci_rx_work+0x6a0/0xd00 net/bluetooth/hci_core.c:5084
process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298
worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445
kthread+0x721/0x850 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Uninit was created at:
slab_post_alloc_hook mm/slab.h:524 [inline]
slab_alloc_node mm/slub.c:3251 [inline]
__kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974
kmalloc_reserve net/core/skbuff.c:354 [inline]
__alloc_skb+0x545/0xf90 net/core/skbuff.c:426
alloc_skb include/linux/skbuff.h:1126 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:413 [inline]
vhci_get_user drivers/bluetooth/hci_vhci.c:287 [inline]
vhci_write+0x187/0x8f0 drivers/bluetooth/hci_vhci.c:407
call_write_iter include/linux/fs.h:2162 [inline]
new_sync_write fs/read_write.c:503 [inline]
vfs_write+0x1318/0x2030 fs/read_write.c:590
ksys_write+0x28b/0x510 fs/read_write.c:643
__do_sys_write fs/read_write.c:655 [inline]
__se_sys_write fs/read_write.c:652 [inline]
__x64_sys_write+0xdb/0x120 fs/read_write.c:652
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x44/0xae
CPU: 1 PID: 43 Comm: kworker/u5:0 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
=====================================================
prev parent reply other threads:[~2022-01-02 22:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-29 6:35 [syzbot] KMSAN: uninit-value in hci_conn_request_evt syzbot
2022-01-02 22:23 ` syzbot [this message]
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