====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #290 Not tainted ------------------------------------------------------ syz-executor3/5964 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [<000000009f04bdc4>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 but task is already holding lock: (sk_lock-AF_INET){+.+.}, at: [<0000000052f06f82>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000052f06f82>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_INET){+.+.}: lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1461 [inline] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (rtnl_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 register_netdevice_notifier+0xad/0x860 net/core/dev.c:1607 tee_tg_check+0x1a0/0x280 net/netfilter/xt_TEE.c:106 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:845 check_target net/ipv4/netfilter/ip_tables.c:513 [inline] find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:554 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:725 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0x370/0x5f0 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz-executor3/5964: #0: (sk_lock-AF_INET){+.+.}, at: [<0000000052f06f82>] lock_sock include/net/sock.h:1461 [inline] #0: (sk_lock-AF_INET){+.+.}, at: [<0000000052f06f82>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 stack backtrace: CPU: 1 PID: 5964 Comm: syz-executor3 Not tainted 4.15.0+ #290 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_circular_bug.isra.38+0x2cd/0x2dc kernel/locking/lockdep.c:1223 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2417 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3431 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 register_netdevice_notifier+0xad/0x860 net/core/dev.c:1607 tee_tg_check+0x1a0/0x280 net/netfilter/xt_TEE.c:106 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:845 check_target net/ipv4/netfilter/ip_tables.c:513 [inline] find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:554 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:725 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0x370/0x5f0 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f8d71c23c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 0000000000000609 R08: 00000000000002e0 R09: 0000000000000000 R10: 000000002002ccf8 R11: 0000000000000212 R12: 00000000006f8178 R13: 00000000ffffffff R14: 00007f8d71c246d4 R15: 0000000000000000 audit: type=1400 audit(1517485122.529:27): avc: denied { map } for pid=5989 comm="syz-executor0" path="/24/file0/bus" dev="ramfs" ino=15251 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ramfs_t:s0 tclass=file permissive=1 audit: type=1400 audit(1517485122.720:28): avc: denied { validate_trans } for pid=6014 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=security permissive=1 audit: type=1400 audit(1517485122.788:29): avc: denied { name_bind } for pid=6042 comm="syz-executor2" src=20008 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 binder: 6102:6107 Acquire 1 refcount change on invalid ref 0 ret -22 netlink: 'syz-executor3': attribute type 8 has an invalid length. netlink: 'syz-executor3': attribute type 8 has an invalid length. binder: 6102:6117 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 6102:6119 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: BINDER_SET_CONTEXT_MGR already set binder: 6102:6119 ioctl 40046207 0 returned -16 binder: 6102:6107 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 6102:6119 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 6102:6119 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 kauditd_printk_skb: 3 callbacks suppressed audit: type=1400 audit(1517485123.100:33): avc: denied { map_write } for pid=6123 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 atomic_op 000000004e733080 conn xmit_atomic (null) atomic_op 0000000093d234e0 conn xmit_atomic (null) mmap: syz-executor0 (6292) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled audit: type=1400 audit(1517485123.837:34): avc: denied { map } for pid=6363 comm="syz-executor3" path=2F6D656D66643A5C202864656C6574656429 dev="tmpfs" ino=17516 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file permissive=1 binder: 6363:6370 ioctl c0306201 203e8000 returned -14 TCP: request_sock_TCPv6: Possible SYN flooding on port 20026. Sending cookies. Check SNMP counters. audit: type=1326 audit(1517485123.876:35): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6355 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485123.882:36): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6355 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=78 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485123.882:37): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6355 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485123.883:38): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6355 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=9 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485123.887:39): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6355 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485123.896:40): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6355 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=298 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485123.897:41): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6355 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485123.897:42): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6355 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 ptrace attach of "/root/syz-executor0"[4214] was attempted by "/root/syz-executor0"[6844] binder: 6914:6927 transaction failed 29189/-22, size 40-8 line 2788 binder: 6914:6927 transaction failed 29189/-22, size 40-8 line 2788 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 QAT: Invalid ioctl QAT: Invalid ioctl openvswitch: netlink: Message has 8 unknown bytes. openvswitch: netlink: Message has 8 unknown bytes. QAT: Invalid ioctl QAT: Invalid ioctl capability: warning: `syz-executor4' uses deprecated v2 capabilities in a way that may be insecure QAT: Invalid ioctl QAT: Invalid ioctl xt_connbytes: Forcing CT accounting to be enabled device eql entered promiscuous mode xt_CT: You must specify a L4 protocol, and not use inversions on it. xt_CT: You must specify a L4 protocol, and not use inversions on it. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 7739 Comm: syz-executor2 Not tainted 4.15.0+ #290 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 kauditd_printk_skb: 32 callbacks suppressed audit: type=1400 audit(1517485128.476:75): avc: denied { map } for pid=7732 comm="syz-executor5" path="/dev/dsp" dev="devtmpfs" ino=1185 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=1 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc mm/slab.c:3364 [inline] __do_kmalloc mm/slab.c:3702 [inline] __kmalloc+0x63/0x760 mm/slab.c:3713 kmalloc include/linux/slab.h:504 [inline] kzalloc include/linux/slab.h:688 [inline] sg_start_req drivers/scsi/sg.c:1697 [inline] sg_common_write.isra.16+0xc5c/0x1cb0 drivers/scsi/sg.c:777 sg_new_write.isra.18+0x5d7/0x870 drivers/scsi/sg.c:746 sg_ioctl+0x1be4/0x2d90 drivers/scsi/sg.c:890 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f85bcba5c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f85bcba5aa0 RCX: 0000000000453299 RDX: 0000000020007000 RSI: 0000000000002285 RDI: 0000000000000013 RBP: 00007f85bcba5a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f85bcba5bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7781 Comm: syz-executor2 Not tainted 4.15.0+ #290 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc_node mm/slab.c:3285 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3628 create_task_io_context+0xb5/0x540 block/blk-ioc.c:271 create_io_context block/blk.h:299 [inline] blk_old_get_request block/blk-core.c:1487 [inline] blk_get_request_flags+0x3ea/0x6b0 block/blk-core.c:1526 blk_get_request+0x2c/0x40 block/blk-core.c:1538 sg_start_req drivers/scsi/sg.c:1717 [inline] sg_common_write.isra.16+0x47f/0x1cb0 drivers/scsi/sg.c:777 sg_new_write.isra.18+0x5d7/0x870 drivers/scsi/sg.c:746 sg_ioctl+0x1be4/0x2d90 drivers/scsi/sg.c:890 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f85bcba5c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f85bcba5aa0 RCX: 0000000000453299 RDX: 0000000020007000 RSI: 0000000000002285 RDI: 0000000000000013 RBP: 00007f85bcba5a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f85bcba5bc8 R14: 00000000004b8096 R15: 0000000000000000 __get_request: dev 8:0: request aux data allocation failed, iosched may be disturbed audit: type=1400 audit(1517485129.451:76): avc: denied { ipc_lock } for pid=7775 comm="syz-executor0" capability=14 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app IPVS: length: 747 != 24 IPVS: length: 747 != 24 do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app audit: type=1326 audit(1517485130.038:77): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7850 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485130.041:78): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7850 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=237 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485130.041:79): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7850 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485130.041:80): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7850 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=72 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485130.041:81): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7850 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485130.041:82): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7850 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=244 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485130.041:83): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7850 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517485130.041:84): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7850 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=72 compat=0 ip=0x453299 code=0x7ffc0000 ip6t_REJECT: TCP_RESET illegal for non-tcp ip6t_REJECT: TCP_RESET illegal for non-tcp device eql entered promiscuous mode binder: 8092 RLIMIT_NICE not set binder: 8092 RLIMIT_NICE not set binder: release 8091:8095 transaction 10 out, still active binder: undelivered TRANSACTION_COMPLETE binder: BINDER_SET_CONTEXT_MGR already set binder: 8091:8095 unknown command 0 binder: 8091:8095 ioctl c0306201 2000a000 returned -22 binder: 8091:8092 ioctl 40046207 0 returned -16 binder_alloc: 8091: binder_alloc_buf, no vma binder: 8091:8097 transaction failed 29189/-3, size 0-0 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 8091:8092 transaction 10 in, still active binder: send failed reply for transaction 10, target dead WARNING: CPU: 0 PID: 8112 at drivers/staging/android/ion/ion-ioctl.c:73 ion_ioctl+0x2db/0x380 drivers/staging/android/ion/ion-ioctl.c:73