====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #290 Not tainted ------------------------------------------------------ syz-executor2/10816 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [<00000000fbfbe977>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 but task is already holding lock: (sk_lock-AF_INET){+.+.}, at: [<0000000099fb5ef3>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000099fb5ef3>] 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-executor2/10816: #0: (sk_lock-AF_INET){+.+.}, at: [<0000000099fb5ef3>] lock_sock include/net/sock.h:1461 [inline] #0: (sk_lock-AF_INET){+.+.}, at: [<0000000099fb5ef3>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 stack backtrace: CPU: 0 PID: 10816 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 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:00007f2343e9bc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000005c4 R08: 00000000000002e0 R09: 0000000000000000 R10: 000000002002ccf8 R11: 0000000000000212 R12: 00000000006f7b00 R13: 00000000ffffffff R14: 00007f2343e9c6d4 R15: 0000000000000000 Cannot find add_set index 0 as target Cannot find add_set index 0 as target binder_alloc: binder_alloc_mmap_handler: 10965 20a3f000-20a40000 already mapped failed -16 binder_alloc: binder_alloc_mmap_handler: 10965 20a3f000-20a40000 already mapped failed -16 binder: 10999 RLIMIT_NICE not set binder: 10994:11014 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 10994:11013 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 10994:11015 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: 11013 RLIMIT_NICE not set binder: undelivered death notification, 0000000000000000 9pnet_virtio: no channels available for device ./file0 9pnet_virtio: no channels available for device ./file0 binder: 11064:11066 ioctl c0306201 20000fd0 returned -14 binder: 11064:11066 ioctl c018620b 205e0fe8 returned -14 binder: 11064:11070 ioctl c0306201 20000fd0 returned -14 snd_dummy snd_dummy.0: control 120:0:0::0 is already present device eql entered promiscuous mode binder: 11103 RLIMIT_NICE not set binder: 11103 RLIMIT_NICE not set binder_alloc: binder_alloc_mmap_handler: 11102 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 11126 RLIMIT_NICE not set binder: 11102:11114 ioctl 40046207 0 returned -16 binder_alloc: 11102: binder_alloc_buf, no vma binder: 11102:11126 transaction failed 29189/-3, size 0-0 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 11102:11114 transaction 34 out, still active binder: undelivered TRANSACTION_COMPLETE binder: BINDER_SET_CONTEXT_MGR already set binder: 11137:11140 ioctl 40046207 0 returned -16 binder: 11140 RLIMIT_NICE not set binder_alloc: 11102: binder_alloc_buf, no vma binder: 11137:11152 transaction failed 29189/-3, size 0-0 line 2903 binder: release 11102:11103 transaction 34 in, still active binder: send failed reply for transaction 34, target dead binder: undelivered TRANSACTION_ERROR: 29189 binder: 11260:11270 ioctl 540f 2012affc returned -22 ip6t_REJECT: TCP_RESET illegal for non-tcp binder: 11260:11270 BC_CLEAR_DEATH_NOTIFICATION invalid ref 4 binder: 11260:11282 got transaction with invalid parent offset or type binder: 11260:11282 transaction failed 29201/-22, size 322-8 line 3088 binder_alloc: binder_alloc_mmap_handler: 11260 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 11260:11270 ioctl 40046207 0 returned -16 binder: 11260:11282 ioctl 540f 2012affc returned -22 binder: 11260:11282 BC_CLEAR_DEATH_NOTIFICATION invalid ref 4 binder_alloc: 11260: binder_alloc_buf, no vma binder: 11260:11302 transaction failed 29189/-3, size 322-8 line 2903 binder: 11315:11324 ioctl 540f 2012affc returned -22 device eql entered promiscuous mode binder: 11315:11324 BC_CLEAR_DEATH_NOTIFICATION invalid ref 4 binder: 11315:11324 got transaction with invalid parent offset or type binder: 11315:11324 transaction failed 29201/-22, size 322-8 line 3088 binder: 11358:11363 ioctl 540f 2012affc returned -22 binder: 11358:11363 BC_CLEAR_DEATH_NOTIFICATION invalid ref 4 binder: 11358:11363 got transaction with invalid parent offset or type binder: 11358:11363 transaction failed 29201/-22, size 322-8 line 3088 binder: 11382:11389 ioctl 540f 2012affc returned -22 binder: 11382:11389 BC_CLEAR_DEATH_NOTIFICATION invalid ref 4 binder: 11382:11389 got transaction with invalid parent offset or type binder: 11382:11389 transaction failed 29201/-22, size 322-8 line 3088 ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11477] ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11518] ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11547] ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11580] ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11599] FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 11788 Comm: syz-executor7 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 mm/slab.c:3364 [inline] kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3604 kmalloc include/linux/slab.h:499 [inline] bdi_split_work_to_wbs+0x589/0x11f0 fs/fs-writeback.c:831 sync_inodes_sb+0x2f2/0x420 fs/fs-writeback.c:2425 sync_inodes_one_sb+0x3b/0x50 fs/sync.c:74 iterate_supers+0x12e/0x250 fs/super.c:598 sys_sync+0xe4/0x1c0 fs/sync.c:113 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f0ec6f86c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f0ec6f86aa0 RCX: 0000000000453299 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f0ec6f86a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f0ec6f86bc8 R14: 00000000004b8096 R15: 0000000000000000 ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11804] ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11880] ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11889] ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[11899] ptrace attach of "/root/syz-executor3"[4205] was attempted by "/root/syz-executor3"[12035] FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 12145 Comm: syz-executor4 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 mm/slab.c:3364 [inline] kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3604 kmalloc include/linux/slab.h:499 [inline] bdi_split_work_to_wbs+0x589/0x11f0 fs/fs-writeback.c:831 sync_inodes_sb+0x2f2/0x420 fs/fs-writeback.c:2425 sync_inodes_one_sb+0x3b/0x50 fs/sync.c:74 iterate_supers+0x12e/0x250 fs/super.c:598 sys_sync+0xe4/0x1c0 fs/sync.c:113 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f34ffb20c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f34ffb20aa0 RCX: 0000000000453299 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f34ffb20a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f34ffb20bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 12157 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 mm/slab.c:3364 [inline] kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3604 kmalloc include/linux/slab.h:499 [inline] bdi_split_work_to_wbs+0x589/0x11f0 fs/fs-writeback.c:831 sync_inodes_sb+0x2f2/0x420 fs/fs-writeback.c:2425 sync_inodes_one_sb+0x3b/0x50 fs/sync.c:74 iterate_supers+0x12e/0x250 fs/super.c:598 sys_sync+0xe4/0x1c0 fs/sync.c:113 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f2343e9bc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f2343e9baa0 RCX: 0000000000453299 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f2343e9ba90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f2343e9bbc8 R14: 00000000004b8096 R15: 0000000000000000 kauditd_printk_skb: 49 callbacks suppressed audit: type=1400 audit(1517488462.455:508): avc: denied { write } for pid=12474 comm="syz-executor2" name="net" dev="proc" ino=35568 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=dir permissive=1 audit: type=1400 audit(1517488462.456:509): avc: denied { add_name } for pid=12474 comm="syz-executor2" name="pfkey" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=dir permissive=1 audit: type=1400 audit(1517488462.457:510): avc: denied { create } for pid=12474 comm="syz-executor2" name="pfkey" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:insmod_t:s0 tclass=file permissive=1