[ 31.573379] kauditd_printk_skb: 9 callbacks suppressed [ 31.573386] audit: type=1800 audit(1578356047.998:33): pid=7010 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 31.601354] audit: type=1800 audit(1578356047.998:34): pid=7010 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 [ 31.955566] audit: type=1400 audit(1578356048.378:35): avc: denied { map } for pid=7181 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 32.012046] random: sshd: uninitialized urandom read (32 bytes read) [ 32.677395] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.867717] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.51' (ECDSA) to the list of known hosts. [ 38.461171] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 38.583859] audit: type=1400 audit(1578356055.008:36): avc: denied { map } for pid=7195 comm="syz-executor742" path="/root/syz-executor742016246" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 38.587617] netlink: 20 bytes leftover after parsing attributes in process `syz-executor742'. [ 38.625342] netlink: 20 bytes leftover after parsing attributes in process `syz-executor742'. [ 38.700533] [ 38.702360] ============================================ [ 38.707814] WARNING: possible recursive locking detected [ 38.713271] 4.14.162-syzkaller #0 Not tainted [ 38.718029] -------------------------------------------- [ 38.723529] syz-executor742/7195 is trying to acquire lock: [ 38.729259] (rtnl_mutex){+.+.}, at: [] rtnl_lock+0x17/0x20 [ 38.737009] [ 38.737009] but task is already holding lock: [ 38.742986] (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x339/0xb70 [ 38.751291] [ 38.751291] other info that might help us debug this: [ 38.758251] Possible unsafe locking scenario: [ 38.758251] [ 38.764501] CPU0 [ 38.767187] ---- [ 38.769769] lock(rtnl_mutex); [ 38.773141] lock(rtnl_mutex); [ 38.776432] [ 38.776432] *** DEADLOCK *** [ 38.776432] [ 38.782495] May be due to missing lock nesting notation [ 38.782495] [ 38.789568] 1 lock held by syz-executor742/7195: [ 38.794332] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x339/0xb70 [ 38.802935] [ 38.802935] stack backtrace: [ 38.807723] CPU: 1 PID: 7195 Comm: syz-executor742 Not tainted 4.14.162-syzkaller #0 [ 38.815709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.825297] Call Trace: [ 38.827897] dump_stack+0x142/0x197 [ 38.831768] __lock_acquire.cold+0x2bf/0x8dc [ 38.836370] ? save_trace+0x290/0x290 [ 38.840206] ? trace_hardirqs_on_caller+0x400/0x590 [ 38.845245] ? trace_hardirqs_on+0x10/0x10 [ 38.849519] ? put_dec+0xc0/0xc0 [ 38.852896] ? format_decode+0x1d8/0x930 [ 38.856970] ? save_trace+0x290/0x290 [ 38.860782] ? set_precision+0x150/0x150 [ 38.864855] ? __lock_is_held+0xb6/0x140 [ 38.869017] lock_acquire+0x16f/0x430 [ 38.873004] ? rtnl_lock+0x17/0x20 [ 38.876639] ? rtnl_lock+0x17/0x20 [ 38.880188] __mutex_lock+0xe8/0x1470 [ 38.884133] ? rtnl_lock+0x17/0x20 [ 38.887781] ? vsprintf+0x40/0x40 [ 38.891299] ? rtnl_lock+0x17/0x20 [ 38.894855] ? mutex_trylock+0x1c0/0x1c0 [ 38.899343] ? __dev_alloc_name+0x251/0x2c0 [ 38.903960] ? __lock_is_held+0xb6/0x140 [ 38.908513] ? __dev_get_by_name+0x140/0x140 [ 38.913132] ? memcpy+0x46/0x50 [ 38.916531] ? hsr_dev_close+0x10/0x10 [ 38.920437] mutex_lock_nested+0x16/0x20 [ 38.924510] ? mutex_lock_nested+0x16/0x20 [ 38.928762] rtnl_lock+0x17/0x20 [ 38.932441] hsr_dev_destroy+0x1f/0xc0 [ 38.936340] ? hsr_dev_close+0x10/0x10 [ 38.940250] register_netdevice+0x7da/0xca0 [ 38.945088] ? netdev_change_features+0x80/0x80 [ 38.949771] ? hsr_add_port+0x42a/0x610 [ 38.953757] hsr_dev_finalize+0x582/0x80a [ 38.957910] hsr_newlink+0x250/0x340 [ 38.961630] ? send_hsr_supervision_frame.cold+0x26/0x26 [ 38.967200] ? rtnl_create_link+0x12c/0x850 [ 38.971645] rtnl_newlink+0xecb/0x1700 [ 38.975548] ? send_hsr_supervision_frame.cold+0x26/0x26 [ 38.981289] ? rtnl_link_unregister+0x200/0x200 [ 38.985979] ? avc_has_perm_noaudit+0x2b2/0x420 [ 38.990673] ? lock_acquire+0x16f/0x430 [ 38.994747] ? rtnetlink_rcv_msg+0x339/0xb70 [ 38.999400] ? rtnl_link_unregister+0x200/0x200 [ 39.004066] rtnetlink_rcv_msg+0x3da/0xb70 [ 39.008382] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 39.013307] ? netlink_deliver_tap+0x93/0x8f0 [ 39.017797] netlink_rcv_skb+0x14f/0x3c0 [ 39.021852] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 39.026598] ? lock_downgrade+0x740/0x740 [ 39.030790] ? netlink_ack+0x9a0/0x9a0 [ 39.034665] ? netlink_deliver_tap+0xba/0x8f0 [ 39.039149] rtnetlink_rcv+0x1d/0x30 [ 39.042850] netlink_unicast+0x44d/0x650 [ 39.047033] ? netlink_attachskb+0x6a0/0x6a0 [ 39.051441] ? security_netlink_send+0x81/0xb0 [ 39.056011] netlink_sendmsg+0x7c4/0xc60 [ 39.060063] ? netlink_unicast+0x650/0x650 [ 39.064299] ? security_socket_sendmsg+0x89/0xb0 [ 39.069049] ? netlink_unicast+0x650/0x650 [ 39.073273] sock_sendmsg+0xce/0x110 [ 39.076974] ___sys_sendmsg+0x70a/0x840 [ 39.081053] ? copy_msghdr_from_user+0x3f0/0x3f0 [ 39.085891] ? __might_fault+0x110/0x1d0 [ 39.089997] ? find_held_lock+0x35/0x130 [ 39.094052] ? __might_fault+0x110/0x1d0 [ 39.098206] ? lock_downgrade+0x740/0x740 [ 39.102451] ? kasan_check_read+0x11/0x20 [ 39.106855] ? _copy_to_user+0x87/0xd0 [ 39.110929] ? move_addr_to_user+0x94/0x1a0 [ 39.115386] ? __fget_light+0x172/0x1f0 [ 39.119447] ? __fdget+0x1b/0x20 [ 39.122849] ? sockfd_lookup_light+0xb4/0x160 [ 39.127462] __sys_sendmsg+0xb9/0x140 [ 39.131256] ? SyS_shutdown+0x170/0x170 [ 39.135218] ? fd_install+0x4d/0x60 [ 39.138837] SyS_sendmsg+0x2d/0x50 [ 39.142368] ? __sys_sendmsg+0x140/0x140 [ 39.146419] do_syscall_64+0x1e8/0x640 [ 39.150300] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.155130] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 39.160308] RIP: 0033:0x4408e9 [ 39.163689] RSP: 002b:00007ffe789586d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 39.171401] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004408e9 [ 39.178797] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 39.186354] RBP: 00000000006cb018 R08: 0000000000000002 R09: 00000000004002c8 [ 39.193783] R10: 0000000000000014 R11: 0000000000000246 R12: 0000000000402170 [ 39.202015] R13: 0000000000402200 R14: 0000000000000000 R15: 0000000000000000