random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
netlink: 'syz-executor622': attribute type 4 has an invalid length.
============================================
WARNING: possible recursive locking detected
4.18.0-rc8-next-20180810+ #36 Not tainted
--------------------------------------------
syz-executor622/4389 is trying to acquire lock:
00000000d6911ccb (&(&tlocks[i])->rlock){+.+.}, at: spin_lock_bh include/linux/spinlock.h:334 [inline]
00000000d6911ccb (&(&tlocks[i])->rlock){+.+.}, at: __rhashtable_insert_fast include/linux/rhashtable.h:596 [inline]
00000000d6911ccb (&(&tlocks[i])->rlock){+.+.}, at: rhashtable_lookup_insert_fast.constprop.26+0x436/0x13a0 include/linux/rhashtable.h:784
but task is already holding lock:
00000000e9555915 (&(&tlocks[i])->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:329 [inline]
00000000e9555915 (&(&tlocks[i])->rlock){+.+.}, at: ila_add_mapping net/ipv6/ila/ila_xlat.c:233 [inline]
00000000e9555915 (&(&tlocks[i])->rlock){+.+.}, at: ila_xlat_nl_cmd_add_mapping+0x6bb/0x17e0 net/ipv6/ila/ila_xlat.c:355
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&(&tlocks[i])->rlock);
lock(&(&tlocks[i])->rlock);
*** DEADLOCK ***
May be due to missing lock nesting notation
3 locks held by syz-executor622/4389:
#0: 00000000a86ea17f (cb_lock){++++}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:636
#1: 00000000e9555915 (&(&tlocks[i])->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:329 [inline]
#1: 00000000e9555915 (&(&tlocks[i])->rlock){+.+.}, at: ila_add_mapping net/ipv6/ila/ila_xlat.c:233 [inline]
#1: 00000000e9555915 (&(&tlocks[i])->rlock){+.+.}, at: ila_xlat_nl_cmd_add_mapping+0x6bb/0x17e0 net/ipv6/ila/ila_xlat.c:355
#2: 000000004f1b152f (rcu_read_lock){....}, at: __rhashtable_insert_fast include/linux/rhashtable.h:579 [inline]
#2: 000000004f1b152f (rcu_read_lock){....}, at: rhashtable_lookup_insert_fast.constprop.26+0x1d7/0x13a0 include/linux/rhashtable.h:784
stack backtrace:
CPU: 0 PID: 4389 Comm: syz-executor622 Not tainted 4.18.0-rc8-next-20180810+ #36
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
print_deadlock_bug kernel/locking/lockdep.c:1765 [inline]
check_deadlock kernel/locking/lockdep.c:1809 [inline]
validate_chain kernel/locking/lockdep.c:2405 [inline]
__lock_acquire.cold.65+0x1fb/0x486 kernel/locking/lockdep.c:3435
lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168
spin_lock_bh include/linux/spinlock.h:334 [inline]
__rhashtable_insert_fast include/linux/rhashtable.h:596 [inline]
rhashtable_lookup_insert_fast.constprop.26+0x436/0x13a0 include/linux/rhashtable.h:784
ila_add_mapping net/ipv6/ila/ila_xlat.c:240 [inline]
ila_xlat_nl_cmd_add_mapping+0xafe/0x17e0 net/ipv6/ila/ila_xlat.c:355
genl_family_rcv_msg+0x8a3/0x1140 net/netlink/genetlink.c:601
genl_rcv_msg+0xc6/0x168 net/netlink/genetlink.c:626
netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2454
genl_rcv+0x28/0x40 net/netlink/genetlink.c:637
netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
netlink_unicast+0x5a0/0x760 net/netlink/af_netlink.c:1343
netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1908
sock_sendmsg_nosec net/socket.c:622 [inline]
sock_sendmsg+0xd5/0x120 net/socket.c:632
___sys_sendmsg+0x7fd/0x930 net/socket.c:2115
__sys_sendmsg+0x11d/0x290 net/socket.c:2153
__do_sys_sendmsg net/socket.c:2162 [inline]
__se_sys_sendmsg net/socket.c:2160 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440169
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffe66c23798 EFLAGS: 00000213 ORIG_RAX: 0000000000