====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #292 Not tainted ------------------------------------------------------ syz-executor4/6060 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000001177ab8a>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000001177ab8a>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000b272186b>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (rtnl_mutex){+.+.}: __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 sctp_setsockopt+0x2b6/0x61d0 net/sctp/socket.c:4104 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 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor4/6060: #0: (rtnl_mutex){+.+.}, at: [<00000000b272186b>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 6060 Comm: syz-executor4 Not tainted 4.15.0+ #292 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 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 RIP: 0033:0x453299 RSP: 002b:00007f9ca1c39c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f9ca1c3a700 RCX: 0000000000453299 RDX: 0000000000000027 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 0000000000000000 R08: 000000000000000c R09: 0000000000000000 R10: 0000000020683ff4 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a2f33f R14: 00007f9ca1c3a9c0 R15: 0000000000000000 netlink: 188 bytes leftover after parsing attributes in process `syz-executor6'. binder: 6394:6400 got transaction with invalid offset (0, min 0 max 0) or object. QAT: Invalid ioctl binder: 6394:6400 transaction failed 29201/-22, size 0-8 line 3020 QAT: Invalid ioctl binder_alloc: binder_alloc_mmap_handler: 6394 20265000-20279000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder_alloc: 6394: binder_alloc_buf, no vma binder: 6394:6410 transaction failed 29189/-3, size 0-8 line 2957 binder: 6394:6400 ioctl 40046207 0 returned -16 kauditd_printk_skb: 8 callbacks suppressed audit: type=1326 audit(1517567044.279:103): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 binder: undelivered TRANSACTION_ERROR: 29189 audit: type=1326 audit(1517567044.285:104): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=138 compat=0 ip=0x453299 code=0x7ffc0000 binder: undelivered TRANSACTION_ERROR: 29201 audit: type=1326 audit(1517567044.285:105): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 SNAT: multiple ranges no longer supported audit: type=1326 audit(1517567044.369:106): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=288 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517567044.369:107): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517567044.372:108): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517567044.374:109): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=18 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517567044.375:110): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 rfkill: input handler disabled audit: type=1326 audit(1517567044.375:111): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=9 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517567044.385:112): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6426 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled xt_limit: Overflow, try lower: 0/0 syz-executor7 uses obsolete (PF_INET,SOCK_PACKET) rfkill: input handler disabled rfkill: input handler enabled xt_limit: Overflow, try lower: 0/0 rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled IPVS: length: 24 != 8 IPVS: length: 24 != 8 device syz1 entered promiscuous mode rfkill: input handler disabled rfkill: input handler enabled device syz1 left promiscuous mode rfkill: input handler disabled rfkill: input handler enabled IPVS: ftp: loaded support on port[0] = 21 binder: undelivered death notification, 0000000000000000 rfkill: input handler disabled rfkill: input handler enabled binder: BINDER_SET_CONTEXT_MGR already set binder: 6876:6890 ioctl 40046207 0 returned -16 rfkill: input handler disabled binder: undelivered death notification, 0000000000000000 rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled binder: undelivered death notification, 0000000000000000 rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled xt_connbytes: Forcing CT accounting to be enabled rfkill: input handler disabled rfkill: input handler enabled device eql entered promiscuous mode rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled QAT: Invalid ioctl rfkill: input handler disabled QAT: Invalid ioctl rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled handle_userfault: 249 callbacks suppressed FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 7369 Comm: syz-executor1 Not tainted 4.15.0+ #292 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 handle_userfault+0xbd9/0x2500 fs/userfaultfd.c:430 do_anonymous_page mm/memory.c:3153 [inline] handle_pte_fault mm/memory.c:3967 [inline] __handle_mm_fault+0x32a3/0x3ce0 mm/memory.c:4093 handle_mm_fault+0x38f/0x930 mm/memory.c:4130 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1426 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1501 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1261 RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline] RIP: 0010:iov_iter_fault_in_readable+0x1a7/0x410 lib/iov_iter.c:421 RSP: 0018:ffff8801cdb3f928 EFLAGS: 00010246 RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff825ae3d1 RDX: 00000000000000c3 RSI: ffffc90001916000 RDI: ffff8801cdb3fd28 RBP: ffff8801cdb3fa08 R08: 1ffff100388ba042 R09: 1ffff10039b67f1a R10: ffff8801cdb3f858 R11: ffffffff8814b148 R12: 1ffff10039b67f28 R13: ffff8801cdb3f9e0 R14: 0000000000000000 R15: ffff8801cdb3fd20 generic_perform_write+0x200/0x600 mm/filemap.c:3128 __generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3263 generic_file_write_iter+0x399/0x790 mm/filemap.c:3291 call_write_iter include/linux/fs.h:1781 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x684/0x970 fs/read_write.c:482 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f8848fc0c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000030 RSI: 0000000020011fd2 RDI: 0000000000000015 RBP: 00000000000000cc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f03c0 R13: 00000000ffffffff R14: 00007f8848fc16d4 R15: 0000000000000000 rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7462 comm=syz-executor5 rfkill: input handler disabled rfkill: input handler enabled SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7472 comm=syz-executor5 rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7487 comm=syz-executor5 rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled