WARNING in __list_add

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: f057ff93 Merge 4.4.148 into android-4.4
git tree: android-4.4
console output: https://syzkaller.appspot.com/x/log.txt?x=136fc5f2400000
kernel config: https://syzkaller.appspot.com/x/.config?x=b72c2b16b5f35bf1
dashboard link: https://syzkaller.appspot.com/bug?extid=e26a8465bbfad9318207
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1124cef2400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16983a86400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+e26a84...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 4144 at lib/list_debug.c:36 __list_add+0x169/0x1c0
lib/list_debug.c:34()
list_add double add: new=ffff8801cb3d0c58, prev=ffffffff844ee460,
next=ffff8801cb3d0c58.
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4144 Comm: syz-executor535 Not tainted 4.4.148-gf057ff9 #81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
0000000000000000 b055c8588ec9fb84 ffff8800ba8af948 ffffffff81e1448d
ffffffff83a44e40 ffff8801d8e46000 ffffffff83c155c0 0000000000000009
0000000000000024 ffff8800ba8afa08 ffffffff8140ce24 0000000041b58ab3
Call Trace:
[<ffffffff81e1448d>] __dump_stack lib/dump_stack.c:15 [inline]
[<ffffffff81e1448d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
[<ffffffff8140ce24>] panic+0x19e/0x38d kernel/panic.c:112
[<ffffffff8140d048>] warn_slowpath_common.cold.6+0x20/0x20
kernel/panic.c:455
[<ffffffff8113296f>] warn_slowpath_fmt+0xbf/0x100 kernel/panic.c:471
[<ffffffff81e74299>] __list_add+0x169/0x1c0 lib/list_debug.c:34
[<ffffffff813a467c>] list_add include/linux/list.h:63 [inline]
[<ffffffff813a467c>] blk_trace_startstop+0x24c/0x340
kernel/trace/blktrace.c:626
[<ffffffff826b9428>] sg_ioctl+0x1198/0x2930 drivers/scsi/sg.c:1145
[<ffffffff8155dadf>] vfs_ioctl fs/ioctl.c:43 [inline]
[<ffffffff8155dadf>] file_ioctl fs/ioctl.c:470 [inline]
[<ffffffff8155dadf>] do_vfs_ioctl+0x63f/0xf40 fs/ioctl.c:605
[<ffffffff8155e46f>] SYSC_ioctl fs/ioctl.c:622 [inline]
[<ffffffff8155e46f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
[<ffffffff838ca6a5>] entry_SYSCALL_64_fastpath+0x22/0x9e
Shutting down cpus with NMI
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


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