syzbot

random: sshd: uninitialized urandom read (32 bytes read)
urandom_read: 1 callbacks suppressed
random: sshd: uninitialized urandom read (32 bytes read)
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WARNING: CPU: 0 PID: 24 at lib/list_debug.c:33 __list_add+0x143/0x1c0 lib/list_debug.c:30
list_add corruption. prev->next should be next (ffff8801b6e31430), but was ffff8801b6e31440. (prev=ffff8801bc648098).
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 24 Comm: kworker/0:1 Not tainted 4.9.124-g09eb2ba #31
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events p9_write_work
 ffff8801d940f9b8 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff
 0000000000000000 0000000000000000 0000000000000021 ffff8801d940fa78
 ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6
Call Trace:
 [<ffffffff81eb95e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb95e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81423eb5>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff814241a1>] __warn.cold.9+0xc1/0x17f kernel/panic.c:542
 [<ffffffff81138252>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565
 [<ffffffff81f21323>] __list_add+0x143/0x1c0 lib/list_debug.c:30
 [<ffffffff839cb856>] list_add_tail include/linux/list.h:77 [inline]
 [<ffffffff839cb856>] list_move_tail include/linux/list.h:169 [inline]
 [<ffffffff839cb856>] p9_write_work+0x1a6/0x910 net/9p/trans_fd.c:474
 [<ffffffff8118f461>] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092
 [<ffffffff81190256>] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226
 [<ffffffff8119f3cd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff83a01b9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..