============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #177 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1702 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 4 locks held by syz-executor5/2374: #0: (rtnl_mutex){+.+.}, at: [<000000009183e6f1>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000fde989d6>] spin_trylock_bh include/linux/spinlock.h:370 [inline] #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000fde989d6>] fib6_run_gc+0x2b7/0x3c0 net/ipv6/ip6_fib.c:2008 #2: (rcu_read_lock){....}, at: [<00000000da40878f>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1560 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000c01f90c1>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000c01f90c1>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1948 stack backtrace: CPU: 0 PID: 2374 Comm: syz-executor5 Not tainted 4.15.0-rc5+ #177 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 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4585 fib6_del+0xcaa/0x11b0 net/ipv6/ip6_fib.c:1701 fib6_clean_node+0x3aa/0x4f0 net/ipv6/ip6_fib.c:1892 fib6_walk_continue+0x46c/0x8a0 net/ipv6/ip6_fib.c:1815 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1863 fib6_clean_tree+0x1e6/0x340 net/ipv6/ip6_fib.c:1933 __fib6_clean_all+0x1f4/0x3a0 net/ipv6/ip6_fib.c:1949 fib6_clean_all net/ipv6/ip6_fib.c:1960 [inline] fib6_run_gc+0x16b/0x3c0 net/ipv6/ip6_fib.c:2016 ndisc_netdev_event+0x3c2/0x4a0 net/ipv6/ndisc.c:1776 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x32/0x70 net/core/dev.c:1696 call_netdevice_notifiers net/core/dev.c:1714 [inline] dev_close_many+0x3fb/0x850 net/core/dev.c:1492 rollback_registered_many+0x4d5/0xe20 net/core/dev.c:7285 unregister_netdevice_many.part.116+0x87/0x420 net/core/dev.c:8362 unregister_netdevice_many+0xbb/0x100 net/core/dev.c:8361 mroute_clean_tables+0x1fc/0x850 net/ipv6/ip6mr.c:1562 ip6mr_sk_done+0x3a8/0x450 net/ipv6/ip6mr.c:1638 ip6_mroute_setsockopt+0x1009/0x35b0 net/ipv6/ip6mr.c:1700 do_ipv6_setsockopt.isra.9+0x2f0/0x39a0 net/ipv6/ipv6_sockglue.c:163 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1821 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f7b6562ac58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 00000000000000c9 RSI: 0000000000000029 RDI: 0000000000000014 RBP: 0000000000000194 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020c3a000 R11: 0000000000000212 R12: 00000000006f0680 R13: 00000000ffffffff R14: 00007f7b6562b6d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #177 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1729 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 4 locks held by syz-executor5/2374: #0: (rtnl_mutex){+.+.}, at: [<000000009183e6f1>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000fde989d6>] spin_trylock_bh include/linux/spinlock.h:370 [inline] #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000fde989d6>] fib6_run_gc+0x2b7/0x3c0 net/ipv6/ip6_fib.c:2008 #2: (rcu_read_lock){....}, at: [<00000000da40878f>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1560 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000c01f90c1>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000c01f90c1>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1948 stack backtrace: CPU: 0 PID: 2374 Comm: syz-executor5 Not tainted 4.15.0-rc5+ #177 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 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4585 fib6_del+0x425/0x11b0 net/ipv6/ip6_fib.c:1728 fib6_clean_node+0x3aa/0x4f0 net/ipv6/ip6_fib.c:1892 fib6_walk_continue+0x46c/0x8a0 net/ipv6/ip6_fib.c:1815 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1863 fib6_clean_tree+0x1e6/0x340 net/ipv6/ip6_fib.c:1933 __fib6_clean_all+0x1f4/0x3a0 net/ipv6/ip6_fib.c:1949 fib6_clean_all net/ipv6/ip6_fib.c:1960 [inline] fib6_run_gc+0x16b/0x3c0 net/ipv6/ip6_fib.c:2016 ndisc_netdev_event+0x3c2/0x4a0 net/ipv6/ndisc.c:1776 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x32/0x70 net/core/dev.c:1696 call_netdevice_notifiers net/core/dev.c:1714 [inline] dev_close_many+0x3fb/0x850 net/core/dev.c:1492 rollback_registered_many+0x4d5/0xe20 net/core/dev.c:7285 unregister_netdevice_many.part.116+0x87/0x420 net/core/dev.c:8362 unregister_netdevice_many+0xbb/0x100 net/core/dev.c:8361 mroute_clean_tables+0x1fc/0x850 net/ipv6/ip6mr.c:1562 ip6mr_sk_done+0x3a8/0x450 net/ipv6/ip6mr.c:1638 ip6_mroute_setsockopt+0x1009/0x35b0 net/ipv6/ip6mr.c:1700 do_ipv6_setsockopt.isra.9+0x2f0/0x39a0 net/ipv6/ipv6_sockglue.c:163 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1821 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f7b6562ac58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 00000000000000c9 RSI: 0000000000000029 RDI: 0000000000000014 RBP: 0000000000000194 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020c3a000 R11: 0000000000000212 R12: 00000000006f0680 R13: 00000000ffffffff R14: 00007f7b6562b6d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #177 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1639 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 4 locks held by syz-executor5/2374: #0: (rtnl_mutex){+.+.}, at: [<000000009183e6f1>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000fde989d6>] spin_trylock_bh include/linux/spinlock.h:370 [inline] #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000fde989d6>] fib6_run_gc+0x2b7/0x3c0 net/ipv6/ip6_fib.c:2008 #2: (rcu_read_lock){....}, at: [<00000000da40878f>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1560 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000c01f90c1>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000c01f90c1>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1948 stack backtrace: CPU: 0 PID: 2374 Comm: syz-executor5 Not tainted 4.15.0-rc5+ #177 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 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4585 fib6_del_route net/ipv6/ip6_fib.c:1638 [inline] fib6_del+0xd18/0x11b0 net/ipv6/ip6_fib.c:1731 fib6_clean_node+0x3aa/0x4f0 net/ipv6/ip6_fib.c:1892 fib6_walk_continue+0x46c/0x8a0 net/ipv6/ip6_fib.c:1815 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1863 fib6_clean_tree+0x1e6/0x340 net/ipv6/ip6_fib.c:1933 __fib6_clean_all+0x1f4/0x3a0 net/ipv6/ip6_fib.c:1949 fib6_clean_all net/ipv6/ip6_fib.c:1960 [inline] fib6_run_gc+0x16b/0x3c0 net/ipv6/ip6_fib.c:2016 ndisc_netdev_event+0x3c2/0x4a0 net/ipv6/ndisc.c:1776 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x32/0x70 net/core/dev.c:1696 call_netdevice_notifiers net/core/dev.c:1714 [inline] dev_close_many+0x3fb/0x850 net/core/dev.c:1492 rollback_registered_many+0x4d5/0xe20 net/core/dev.c:7285 unregister_netdevice_many.part.116+0x87/0x420 net/core/dev.c:8362 unregister_netdevice_many+0xbb/0x100 net/core/dev.c:8361 mroute_clean_tables+0x1fc/0x850 net/ipv6/ip6mr.c:1562 ip6mr_sk_done+0x3a8/0x450 net/ipv6/ip6mr.c:1638 ip6_mroute_setsockopt+0x1009/0x35b0 net/ipv6/ip6mr.c:1700 do_ipv6_setsockopt.isra.9+0x2f0/0x39a0 net/ipv6/ipv6_sockglue.c:163 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1821 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f7b6562ac58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 00000000000000c9 RSI: 0000000000000029 RDI: 0000000000000014 RBP: 0000000000000194 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020c3a000 R11: 0000000000000212 R12: 00000000006f0680 R13: 00000000ffffffff R14: 00007f7b6562b6d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #177 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1676 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 5 locks held by syz-executor5/2374: #0: (rtnl_mutex){+.+.}, at: [<000000009183e6f1>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000fde989d6>] spin_trylock_bh include/linux/spinlock.h:370 [inline] #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000fde989d6>] fib6_run_gc+0x2b7/0x3c0 net/ipv6/ip6_fib.c:2008 #2: (rcu_read_lock){....}, at: [<00000000da40878f>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1560 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000c01f90c1>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000c01f90c1>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1948 #4: (&net->ipv6.fib6_walker_lock){++--}, at: [<0000000019e13714>] fib6_del_route net/ipv6/ip6_fib.c:1671 [inline] #4: (&net->ipv6.fib6_walker_lock){++--}, at: [<0000000019e13714>] fib6_del+0x935/0x11b0 net/ipv6/ip6_fib.c:1731 stack backtrace: CPU: 0 PID: 2374 Comm: syz-executor5 Not tainted 4.15.0-rc5+ #177 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 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4585 fib6_del_route net/ipv6/ip6_fib.c:1675 [inline] fib6_del+0xeb3/0x11b0 net/ipv6/ip6_fib.c:1731 fib6_clean_node+0x3aa/0x4f0 net/ipv6/ip6_fib.c:1892 fib6_walk_continue+0x46c/0x8a0 net/ipv6/ip6_fib.c:1815 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1863 fib6_clean_tree+0x1e6/0x340 net/ipv6/ip6_fib.c:1933 __fib6_clean_all+0x1f4/0x3a0 net/ipv6/ip6_fib.c:1949 fib6_clean_all net/ipv6/ip6_fib.c:1960 [inline] fib6_run_gc+0x16b/0x3c0 net/ipv6/ip6_fib.c:2016 ndisc_netdev_event+0x3c2/0x4a0 net/ipv6/ndisc.c:1776 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x32/0x70 net/core/dev.c:1696 call_netdevice_notifiers net/core/dev.c:1714 [inline] dev_close_many+0x3fb/0x850 net/core/dev.c:1492 rollback_registered_many+0x4d5/0xe20 net/core/dev.c:7285 unregister_netdevice_many.part.116+0x87/0x420 net/core/dev.c:8362 unregister_netdevice_many+0xbb/0x100 net/core/dev.c:8361 mroute_clean_tables+0x1fc/0x850 net/ipv6/ip6mr.c:1562 ip6mr_sk_done+0x3a8/0x450 net/ipv6/ip6mr.c:1638 ip6_mroute_setsockopt+0x1009/0x35b0 net/ipv6/ip6mr.c:1700 do_ipv6_setsockopt.isra.9+0x2f0/0x39a0 net/ipv6/ipv6_sockglue.c:163 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1821 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f7b6562ac58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 00000000000000c9 RSI: 0000000000000029 RDI: 0000000000000014 RBP: 0000000000000194 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020c3a000 R11: 0000000000000212 R12: 00000000006f0680 R13: 00000000ffffffff R14: 00007f7b6562b6d4 R15: 0000000000000000 nla_parse: 20 callbacks suppressed netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 14 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 14 bytes leftover after parsing attributes in process `syz-executor2'. sctp: [Deprecated]: syz-executor7 (pid 2515) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor7 (pid 2524) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor6 (pid 2521) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor6 (pid 2527) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 10 bytes leftover after parsing attributes in process `syz-executor5'. openvswitch: netlink: Key type 8206 is out of range max 29 openvswitch: netlink: Key type 8206 is out of range max 29 device gre0 left promiscuous mode device gre0 entered promiscuous mode netlink: 11 bytes leftover after parsing attributes in process `syz-executor5'. device lo left promiscuous mode netlink: 6 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 'syz-executor4': attribute type 41 has an invalid length. netlink: 'syz-executor4': attribute type 41 has an invalid length. netlink: 'syz-executor0': attribute type 4 has an invalid length. netlink: 'syz-executor0': attribute type 4 has an invalid length. sctp: [Deprecated]: syz-executor5 (pid 3931) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor5 (pid 3965) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 4078) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead device lo entered promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready sctp: [Deprecated]: syz-executor3 (pid 4078) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead dccp_v4_rcv: dropped packet with invalid checksum dccp_v4_rcv: dropped packet with invalid checksum SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4307 comm=syz-executor5 nla_parse: 20 callbacks suppressed netlink: 36 bytes leftover after parsing attributes in process `syz-executor7'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4325 comm=syz-executor5 netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 'syz-executor7': attribute type 6 has an invalid length. netlink: 'syz-executor7': attribute type 6 has an invalid length. sctp: [Deprecated]: syz-executor6 (pid 4586) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor6 (pid 4586) Use of int in maxseg socket option. Use struct sctp_assoc_value instead