From: syzbot <syzbot+9b658439133becd38da1@syzkaller.appspotmail.com>
To: axboe@kernel.dk, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: WARNING in nbd_dev_add
Date: Wed, 24 Feb 2021 19:47:18 -0800 [thread overview]
Message-ID: <000000000000168cb405bc210223@google.com> (raw)
In-Reply-To: <000000000000251ce705bbe91ddb@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: 6fbd15c0 Merge branch '100GbE' of git://git.kernel.org/pub..
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=17a009a8d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=2b8307379601586a
dashboard link: https://syzkaller.appspot.com/bug?extid=9b658439133becd38da1
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=101ff9b6d00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c9a5cad00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9b658439133becd38da1@syzkaller.appspotmail.com
RBP: 0000000000403430 R08: 00000000004004a0 R09: 00000000004004a0
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004034c0
R13: 0000000000000000 R14: 00000000004ad018 R15: 00000000004004a0
kobject_add_internal failed for 43:0 with -EEXIST, don't try to register things with the same name in the same directory.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8421 at block/genhd.c:620 __device_add_disk+0x1030/0x1300 block/genhd.c:620
Modules linked in:
CPU: 0 PID: 8421 Comm: syz-executor614 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__device_add_disk+0x1030/0x1300 block/genhd.c:620
Code: f1 ff ff e8 42 c4 c1 fd 0f 0b e9 e6 f6 ff ff 48 89 7c 24 20 e8 31 c4 c1 fd 0f 0b 48 8b 7c 24 20 e9 9b f4 ff ff e8 20 c4 c1 fd <0f> 0b e9 dd fb ff ff 4c 89 ef e8 a1 fc 04 fe e9 28 f1 ff ff 48 8b
RSP: 0018:ffffc9000163f340 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888015548000 RSI: ffffffff83b11590 RDI: 0000000000000003
RBP: ffff888025956000 R08: 0000000000000000 R09: ffffffff8fa9a837
R10: ffffffff83b1116b R11: 0000000000000000 R12: 00000000ffffffef
R13: ffff8880259560a0 R14: ffff888016fa97d0 R15: ffff8880171ae000
FS: 0000000001b2c300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000380 CR3: 0000000015534000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
add_disk include/linux/genhd.h:231 [inline]
nbd_dev_add+0x720/0x910 drivers/block/nbd.c:1719
nbd_genl_connect+0x557/0x1570 drivers/block/nbd.c:1829
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:672
____sys_sendmsg+0x6e8/0x810 net/socket.c:2348
___sys_sendmsg+0xf3/0x170 net/socket.c:2402
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2435
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43f9c9
Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd2bb97998 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 000000000043f9c9
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004
RBP: 0000000000403430 R08: 00000000004004a0 R09: 00000000004004a0
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004034c0
R13: 0000000000000000 R14: 00000000004ad018 R15: 00000000004004a0
prev parent reply other threads:[~2021-02-25 3:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-22 9:06 WARNING in nbd_dev_add syzbot
2021-02-25 3:47 ` syzbot [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=000000000000168cb405bc210223@google.com \
--to=syzbot+9b658439133becd38da1@syzkaller.appspotmail.com \
--cc=axboe@kernel.dk \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.