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Date: Mon, 12 Feb 2024 02:26:24 -0800
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Subject: [syzbot] [rdma?] WARNING: ODEBUG bug in siw_netdev_event
From: syzbot <syzbot+e7c51d3be3a5ddfa0d7a@syzkaller.appspotmail.com>
To: bmt@zurich.ibm.com, jgg@ziepe.ca, leon@kernel.org, 
	linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, 
	netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com
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Hello,

syzbot found the following issue on:

HEAD commit:    b1d3a0e70c38 Add linux-next specific files for 20240208
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=3D1325c020180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3Dbb693ba195662a0=
6
dashboard link: https://syzkaller.appspot.com/bug?extid=3De7c51d3be3a5ddfa0=
d7a
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debia=
n) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/176a6b395bbe/disk-=
b1d3a0e7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/02d7d46f81bd/vmlinux-=
b1d3a0e7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/18a5a5030e19/bzI=
mage-b1d3a0e7.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit=
:
Reported-by: syzbot+e7c51d3be3a5ddfa0d7a@syzkaller.appspotmail.com

netlink: 'syz-executor.1': attribute type 27 has an invalid length.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor=
1'.
=1F: port 3(erspan0) entered disabled state
------------[ cut here ]------------
ODEBUG: init active (active state 0) object: ffff88802de95128 object type: =
work_struct hint: siw_netdev_down+0x0/0x1f0
WARNING: CPU: 1 PID: 16397 at lib/debugobjects.c:517 debug_print_object+0x1=
7a/0x1f0 lib/debugobjects.c:514
Modules linked in:
CPU: 1 PID: 16397 Comm: syz-executor.1 Not tainted 6.8.0-rc3-next-20240208-=
syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Goo=
gle 01/25/2024
RIP: 0010:debug_print_object+0x17a/0x1f0 lib/debugobjects.c:514
Code: e8 1b e3 4d fd 4c 8b 0b 48 c7 c7 00 89 fe 8b 48 8b 74 24 08 48 89 ea =
44 89 e1 4d 89 f8 ff 34 24 e8 2b 97 ae fc 48 83 c4 08 90 <0f> 0b 90 90 ff 0=
5 bc 2f dd 0a 48 83 c4 10 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90014536758 EFLAGS: 00010282
RAX: 5f296badc3198f00 RBX: ffffffff8ba9e6a0 RCX: 0000000000040000
RDX: ffffc90004f8b000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffffff8bfe8a80 R08: ffffffff8157b862 R09: fffffbfff1bf95c4
R10: dffffc0000000000 R11: fffffbfff1bf95c4 R12: 0000000000000000
R13: ffffffff8bfe8998 R14: dffffc0000000000 R15: ffff88802de95128
FS:  00007fc00b12a6c0(0000) GS:ffff8880b9500000(0000) knlGS:000000000000000=
0
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1fd40f000 CR3: 000000003e1a6000 CR4: 00000000003506f0
DR0: 000000000000d8dd DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __debug_object_init+0x2a9/0x400 lib/debugobjects.c:653
 siw_device_goes_down drivers/infiniband/sw/siw/siw_main.c:395 [inline]
 siw_netdev_event+0x3bd/0x620 drivers/infiniband/sw/siw/siw_main.c:422
 notifier_call_chain+0x18f/0x3b0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2012 [inline]
 call_netdevice_notifiers net/core/dev.c:2026 [inline]
 __dev_close_many+0x146/0x300 net/core/dev.c:1512
 __dev_close net/core/dev.c:1550 [inline]
 __dev_change_flags+0x30e/0x6f0 net/core/dev.c:8683
 dev_change_flags+0x8b/0x1a0 net/core/dev.c:8757
 do_setlink+0xcb0/0x41c0 net/core/rtnetlink.c:2894
 rtnl_group_changelink net/core/rtnetlink.c:3443 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3702 [inline]
 rtnl_newlink+0x1117/0x20a0 net/core/rtnetlink.c:3739
 rtnetlink_rcv_msg+0x885/0x1040 net/core/rtnetlink.c:6606
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367
 netlink_sendmsg+0xa3c/0xd70 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fc00a47dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 f=
f 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc00b12a0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc00a5ac1f0 RCX: 00007fc00a47dda9
RDX: 0000000000000000 RSI: 0000000020006440 RDI: 0000000000000005
RBP: 00007fc00a4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fc00a5ac1f0 R15: 00007fff19fc38d8
 </TASK>


---
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