[ 42.588882] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.150' (ECDSA) to the list of known hosts. [ 48.120906] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 48.256030] audit: type=1400 audit(1583833648.761:36): avc: denied { map } for pid=7357 comm="syz-executor168" path="/root/syz-executor168353315" 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 executing program [ 48.288493] audit: type=1400 audit(1583833648.761:37): avc: denied { create } for pid=7358 comm="syz-executor168" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 48.289969] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 48.314262] audit: type=1400 audit(1583833648.761:38): avc: denied { write } for pid=7358 comm="syz-executor168" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 48.351432] [ 48.353071] ====================================================== [ 48.359543] WARNING: possible circular locking dependency detected [ 48.366016] 4.14.172-syzkaller #0 Not tainted [ 48.370488] ------------------------------------------------------ [ 48.377858] syz-executor168/7360 is trying to acquire lock: [ 48.385716] (&table[i].mutex){+.+.}, at: [] ip_set_nfnl_put+0x11b/0x310 [ 48.394207] [ 48.394207] but task is already holding lock: [ 48.400163] (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x35/0x3d0 [ 48.408482] [ 48.408482] which lock already depends on the new lock. [ 48.408482] [ 48.416924] [ 48.416924] the existing dependency chain (in reverse order) is: [ 48.425072] [ 48.425072] -> #1 (&xt[i].mutex){+.+.}: [ 48.431135] __mutex_lock+0xe8/0x1470 [ 48.435879] xt_find_revision+0x89/0x200 [ 48.440913] nfnl_compat_get+0x1f7/0x8a0 [ 48.445737] nfnetlink_rcv_msg+0xa08/0xc00 [ 48.450663] netlink_rcv_skb+0x127/0x370 [ 48.455611] nfnetlink_rcv+0x1ab/0x1650 [ 48.460096] netlink_unicast+0x437/0x620 [ 48.464800] netlink_sendmsg+0x733/0xbe0 [ 48.469920] sock_sendmsg+0xc5/0x100 [ 48.474140] ___sys_sendmsg+0x70a/0x840 [ 48.479003] __sys_sendmsg+0xa3/0x120 [ 48.483393] SyS_sendmsg+0x27/0x40 [ 48.488517] do_syscall_64+0x1d5/0x640 [ 48.493217] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 48.499251] [ 48.499251] -> #0 (&table[i].mutex){+.+.}: [ 48.505754] lock_acquire+0x170/0x3f0 [ 48.511018] __mutex_lock+0xe8/0x1470 [ 48.515343] ip_set_nfnl_put+0x11b/0x310 [ 48.519924] set_target_v1_destroy+0xd7/0x150 [ 48.525380] cleanup_entry+0x191/0x240 [ 48.530293] __do_replace+0x38d/0x580 [ 48.534607] do_ip6t_set_ctl+0x255/0x3a3 [ 48.539171] nf_setsockopt+0x5f/0xb0 [ 48.543400] ipv6_setsockopt+0xfd/0x130 [ 48.547888] udpv6_setsockopt+0x45/0x80 [ 48.552376] SyS_setsockopt+0x110/0x1e0 [ 48.557027] do_syscall_64+0x1d5/0x640 [ 48.561428] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 48.567113] [ 48.567113] other info that might help us debug this: [ 48.567113] [ 48.575244] Possible unsafe locking scenario: [ 48.575244] [ 48.581291] CPU0 CPU1 [ 48.585945] ---- ---- [ 48.590603] lock(&xt[i].mutex); [ 48.594032] lock(&table[i].mutex); [ 48.600237] lock(&xt[i].mutex); [ 48.606183] lock(&table[i].mutex); [ 48.609871] [ 48.609871] *** DEADLOCK *** [ 48.609871] [ 48.615907] 1 lock held by syz-executor168/7360: [ 48.620635] #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x35/0x3d0 [ 48.629630] [ 48.629630] stack backtrace: [ 48.634117] CPU: 1 PID: 7360 Comm: syz-executor168 Not tainted 4.14.172-syzkaller #0 [ 48.642011] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.652304] Call Trace: [ 48.654884] dump_stack+0x13e/0x194 [ 48.658493] print_circular_bug.isra.0.cold+0x1c4/0x282 [ 48.663855] __lock_acquire+0x2cb3/0x4620 [ 48.667991] ? trace_hardirqs_on+0x10/0x10 [ 48.672205] ? depot_save_stack+0x10d/0x401 [ 48.676512] ? save_trace+0x290/0x290 [ 48.680323] lock_acquire+0x170/0x3f0 [ 48.684129] ? ip_set_nfnl_put+0x11b/0x310 [ 48.688353] ? ip_set_nfnl_put+0x11b/0x310 [ 48.692567] __mutex_lock+0xe8/0x1470 [ 48.696359] ? ip_set_nfnl_put+0x11b/0x310 [ 48.700573] ? save_trace+0x290/0x290 [ 48.704352] ? ip_set_nfnl_put+0x11b/0x310 [ 48.708586] ? mutex_trylock+0x1a0/0x1a0 [ 48.712628] ? find_held_lock+0x2d/0x110 [ 48.716667] ? ip_set_nfnl_put+0xea/0x310 [ 48.720794] ? lock_downgrade+0x6e0/0x6e0 [ 48.724937] ? ip_set_nfnl_put+0x11b/0x310 [ 48.729155] ip_set_nfnl_put+0x11b/0x310 [ 48.733205] set_target_v1_destroy+0xd7/0x150 [ 48.737685] ? set_target_v3_destroy+0x200/0x200 [ 48.743292] cleanup_entry+0x191/0x240 [ 48.747247] ? cleanup_match+0x130/0x130 [ 48.751413] __do_replace+0x38d/0x580 [ 48.755200] ? compat_do_ip6t_get_ctl+0x7c0/0x7c0 [ 48.760025] do_ip6t_set_ctl+0x255/0x3a3 [ 48.764080] ? compat_do_ip6t_set_ctl+0x140/0x140 [ 48.768910] ? nf_sockopt_find.constprop.0+0x1ad/0x220 [ 48.774170] nf_setsockopt+0x5f/0xb0 [ 48.777872] ipv6_setsockopt+0xfd/0x130 [ 48.781833] udpv6_setsockopt+0x45/0x80 [ 48.785787] SyS_setsockopt+0x110/0x1e0 [ 48.789919] ? SyS_recv+0x40/0x40 [ 48.793353] ? __do_page_fault+0x35b/0xb40 [ 48.797585] ? do_syscall_64+0x4c/0x640 [ 48.801554] ? SyS_recv+0x40/0x40 [ 48.804986] do_syscall_64+0x1d5/0x640 [ 48.808855] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 48.815333] RIP: 0033:0x441529 [ 48.818522] RSP: 002b:00007fff4c41f0d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 48.826389] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441529 [ 48.834252] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000005 [ 48.841529] RBP: 000000000000bc82 R08: 0000000000000001 R09: 00000000004002c8 [ 48.848960] R10: 0000000020001600 R11: 0000000000000246 R12: 0000000000402350 executing program executing program executing program [ 48.856325] R13: 00000000004023e0 R14: 0000000000000000 R15: 0000000000000000 [ 48.864474] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 48.879334] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 48.895966] ip6_tables: ip6tables: counters copy to user failed while replacing table executing program executing program executing program [ 48.909305] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 48.924221] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 48.939612] ip6_tables: ip6tables: counters copy to user failed while replacing table executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 48.955153] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 48.972490] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 48.986798] ip6_tables: ip6tables: counters copy to user failed while replacing table executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 53.294640] net_ratelimit: 730 callbacks suppressed [ 53.294642] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 53.314037] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 53.329051] ip6_tables: ip6tables: counters copy to user failed while replacing table executing program executing program executing program [ 53.343823] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 53.358741] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 53.374204] ip6_tables: ip6tables: counters copy to user failed while replacing table executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 53.388585] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 53.402956] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 53.417670] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 53.432936] ip6_tables: ip6tables: counters copy to user failed while replacing table executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 58.300887] net_ratelimit: 849 callbacks suppressed [ 58.300889] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 58.319708] ip6_tables: ip6tables: counters copy to user failed while replacing table [ 58.334191] ip6_tables: ip6tables: counters copy to user failed while replacing table executing program executing program executing program executing program