====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #290 Not tainted ------------------------------------------------------ syz-executor3/23180 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [<00000000ff09a1e2>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 but task is already holding lock: (sk_lock-AF_INET){+.+.}, at: [<000000009c1c7d01>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000009c1c7d01>] 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 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905 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-executor3/23180: #0: (sk_lock-AF_INET){+.+.}, at: [<000000009c1c7d01>] lock_sock include/net/sock.h:1461 [inline] #0: (sk_lock-AF_INET){+.+.}, at: [<000000009c1c7d01>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 stack backtrace: CPU: 0 PID: 23180 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:00007f9074eb7c58 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: 00007f9074eb86d4 R15: 0000000000000000 kauditd_printk_skb: 177 callbacks suppressed audit: type=1400 audit(1517486439.291:1493): avc: denied { net_admin } for pid=23229 comm="syz-executor7" capability=12 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 audit: type=1400 audit(1517486439.298:1494): avc: denied { sys_admin } for pid=23202 comm="syz-executor4" capability=21 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 audit: type=1400 audit(1517486439.302:1495): avc: denied { net_admin } for pid=4230 comm="syz-executor1" capability=12 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 audit: type=1400 audit(1517486439.310:1496): avc: denied { net_admin } for pid=4232 comm="syz-executor3" capability=12 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 audit: type=1400 audit(1517486439.311:1497): avc: denied { net_admin } for pid=4232 comm="syz-executor3" capability=12 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 audit: type=1400 audit(1517486439.317:1498): avc: denied { dac_override } for pid=23213 comm="syz-executor2" capability=1 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 audit: type=1400 audit(1517486439.318:1499): avc: denied { sys_admin } for pid=23202 comm="syz-executor4" capability=21 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 audit: type=1400 audit(1517486439.329:1500): avc: denied { net_admin } for pid=23229 comm="syz-executor7" capability=12 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 audit: type=1400 audit(1517486439.354:1501): avc: denied { net_admin } for pid=4233 comm="syz-executor0" capability=12 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 audit: type=1400 audit(1517486439.371:1502): avc: denied { net_admin } for pid=4239 comm="syz-executor7" capability=12 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 binder: 23322:23327 transaction failed 29189/-22, size 0-0 line 2788 binder: undelivered TRANSACTION_ERROR: 29189 binder: 23542 RLIMIT_NICE not set binder: 23542 RLIMIT_NICE not set binder: 23542 RLIMIT_NICE not set binder: 23532:23542 got transaction with unaligned buffers size, 5 binder: 23532:23542 transaction failed 29201/-22, size 0-0 line 2948 binder: send failed reply for transaction 74 to 23532:23557 binder_alloc: binder_alloc_mmap_handler: 23532 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 23532:23542 ioctl 40046207 0 returned -16 binder: 23557 RLIMIT_NICE not set binder_alloc: 23532: binder_alloc_buf, no vma binder: 23532:23559 transaction failed 29189/-3, size 0-0 line 2903 binder: 23532:23557 got reply transaction with no transaction stack binder: 23532:23557 transaction failed 29201/-71, size 0-0 line 2703 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29190 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready netlink: 'syz-executor3': attribute type 3 has an invalid length. netlink: 'syz-executor3': attribute type 3 has an invalid length. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 24094 Comm: syz-executor6 Not tainted 4.15.0+ #290 sg_write: data in/out 36090/48 bytes for SCSI command 0x8c-- guessing data in; program syz-executor0 not setting count and/or reply_len properly 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 sg_write: data in/out 36090/48 bytes for SCSI command 0x8c-- guessing data in; program syz-executor0 not setting count and/or reply_len properly 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+0x47/0x760 mm/slab.c:3538 ptlock_alloc+0x24/0x70 mm/memory.c:4718 ptlock_init include/linux/mm.h:1796 [inline] pgtable_page_ctor include/linux/mm.h:1830 [inline] pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 __do_huge_pmd_anonymous_page mm/huge_memory.c:564 [inline] do_huge_pmd_anonymous_page+0x551/0x1b00 mm/huge_memory.c:728 create_huge_pmd mm/memory.c:3860 [inline] __handle_mm_fault+0x1a0c/0x3ce0 mm/memory.c:4064 handle_mm_fault+0x38f/0x930 mm/memory.c:4130 faultin_page mm/gup.c:502 [inline] __get_user_pages+0x50c/0x15f0 mm/gup.c:699 __get_user_pages_locked mm/gup.c:870 [inline] get_user_pages_unlocked+0x2bd/0x4f0 mm/gup.c:990 get_user_pages_fast+0x1b4/0x340 mm/gup.c:1819 iov_iter_get_pages+0x270/0x1150 lib/iov_iter.c:1068 bio_iov_iter_get_pages+0x117/0x4e0 block/bio.c:890 __blkdev_direct_IO_simple+0x4cd/0xf50 fs/block_dev.c:220 blkdev_direct_IO+0xccb/0x1060 fs/block_dev.c:428 generic_file_read_iter+0x4cc/0x28e0 mm/filemap.c:2343 blkdev_read_iter+0x105/0x170 fs/block_dev.c:1913 call_read_iter include/linux/fs.h:1775 [inline] new_sync_read fs/read_write.c:401 [inline] __vfs_read+0x6a7/0xa00 fs/read_write.c:413 vfs_read+0x11e/0x350 fs/read_write.c:447 SYSC_pread64 fs/read_write.c:611 [inline] SyS_pread64+0x15b/0x190 fs/read_write.c:598 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f4bafb07c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007f4bafb07aa0 RCX: 0000000000453299 RDX: 0000000000001000 RSI: 00000000208e6000 RDI: 0000000000000013 RBP: 00007f4bafb07a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f4bafb07bc8 R14: 00000000004b8096 R15: 0000000000000000 kauditd_printk_skb: 888 callbacks suppressed audit: type=1400 audit(1517486444.302:2391): avc: denied { net_admin } for pid=4240 comm="syz-executor6" capability=12 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 audit: type=1400 audit(1517486444.302:2392): avc: denied { net_admin } for pid=4240 comm="syz-executor6" capability=12 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 device syz2 entered promiscuous mode audit: type=1400 audit(1517486444.306:2393): avc: denied { map } for pid=24163 comm="blkid" path="/sbin/blkid" dev="sda1" ino=16128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1517486444.311:2394): avc: denied { map } for pid=24163 comm="blkid" path="/lib/x86_64-linux-gnu/libc-2.13.so" dev="sda1" ino=2784 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1517486444.313:2395): avc: denied { net_admin } for pid=24144 comm="syz-executor1" capability=12 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 audit: type=1400 audit(1517486444.315:2396): avc: denied { map } for pid=24163 comm="blkid" path="/lib/x86_64-linux-gnu/libuuid.so.1.3.0" dev="sda1" ino=2819 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1517486444.316:2397): avc: denied { net_admin } for pid=4229 comm="syz-executor2" capability=12 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 audit: type=1400 audit(1517486444.318:2398): avc: denied { map } for pid=24163 comm="blkid" path="/lib/x86_64-linux-gnu/libuuid.so.1.3.0" dev="sda1" ino=2819 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1517486444.323:2399): avc: denied { net_admin } for pid=4240 comm="syz-executor6" capability=12 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 audit: type=1400 audit(1517486444.333:2400): avc: denied { net_admin } for pid=4232 comm="syz-executor3" capability=12 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 binder: 24260:24265 got new transaction with bad transaction stack, transaction 79 has target 24260:0 binder: 24260:24265 transaction failed 29201/-71, size 0-0 line 2815 binder_alloc: binder_alloc_mmap_handler: 24260 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 24260:24282 ioctl 40046207 0 returned -16 binder_alloc: 24260: binder_alloc_buf, no vma binder: 24260:24282 transaction failed 29189/-3, size 40-8 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 24260:24265 transaction 79 out, still active binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: send failed reply for transaction 79, target dead device gre0 entered promiscuous mode device eql entered promiscuous mode TCP: request_sock_TCPv6: Possible SYN flooding on port 20018. Sending cookies. Check SNMP counters. x_tables: ip_tables: icmp match: only valid for protocol 1 binder: BINDER_SET_CONTEXT_MGR already set binder: 24609:24628 ioctl 40046207 0 returned -16 netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 'syz-executor4': attribute type 21 has an invalid length. netlink: 'syz-executor4': attribute type 4 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. device syz5 entered promiscuous mode netlink: 'syz-executor4': attribute type 21 has an invalid length. netlink: 'syz-executor4': attribute type 4 has an invalid length. device syz5 left promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. kvm [24930]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x40000020 data 0x0 kvm [24930]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x40000020 data 0x0