============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #174 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-executor2/7917: #0: (br_ioctl_mutex){+.+.}, at: [<0000000027aefac4>] sock_ioctl+0x367/0x440 net/socket.c:1018 #1: (rtnl_mutex){+.+.}, at: [<0000000075981ddf>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #2: (rcu_read_lock){....}, at: [<00000000477890f0>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1560 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<0000000016142adc>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<0000000016142adc>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1948 stack backtrace: CPU: 0 PID: 7917 Comm: syz-executor2 Not tainted 4.15.0-rc5+ #174 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+0x27/0x30 net/ipv6/ip6_fib.c:1960 rt6_ifdown+0xd1/0x6a0 net/ipv6/route.c:3490 addrconf_ifdown+0x134/0x14f0 net/ipv6/addrconf.c:3589 addrconf_notify+0x5eb/0x22e0 net/ipv6/addrconf.c:3514 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] rollback_registered_many+0x8b5/0xe20 net/core/dev.c:7308 rollback_registered+0x1be/0x3c0 net/core/dev.c:7350 unregister_netdevice_queue+0x2e3/0x5f0 net/core/dev.c:8343 br_dev_delete+0x138/0x190 net/bridge/br_if.c:320 br_del_bridge+0xac/0xe0 net/bridge/br_if.c:421 br_ioctl_deviceless_stub+0x2ec/0xa00 net/bridge/br_ioctl.c:380 sock_ioctl+0x383/0x440 net/socket.c:1020 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+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007fe02692fc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020a54ff0 RSI: 00000000000089a1 RDI: 0000000000000013 RBP: 000000000000057e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6470 R13: 00000000ffffffff R14: 00007fe0269306d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #174 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-executor2/7917: #0: (br_ioctl_mutex){+.+.}, at: [<0000000027aefac4>] sock_ioctl+0x367/0x440 net/socket.c:1018 #1: (rtnl_mutex){+.+.}, at: [<0000000075981ddf>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #2: (rcu_read_lock){....}, at: [<00000000477890f0>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1560 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<0000000016142adc>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<0000000016142adc>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1948 stack backtrace: CPU: 0 PID: 7917 Comm: syz-executor2 Not tainted 4.15.0-rc5+ #174 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+0x27/0x30 net/ipv6/ip6_fib.c:1960 rt6_ifdown+0xd1/0x6a0 net/ipv6/route.c:3490 addrconf_ifdown+0x134/0x14f0 net/ipv6/addrconf.c:3589 addrconf_notify+0x5eb/0x22e0 net/ipv6/addrconf.c:3514 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] rollback_registered_many+0x8b5/0xe20 net/core/dev.c:7308 rollback_registered+0x1be/0x3c0 net/core/dev.c:7350 unregister_netdevice_queue+0x2e3/0x5f0 net/core/dev.c:8343 br_dev_delete+0x138/0x190 net/bridge/br_if.c:320 br_del_bridge+0xac/0xe0 net/bridge/br_if.c:421 br_ioctl_deviceless_stub+0x2ec/0xa00 net/bridge/br_ioctl.c:380 sock_ioctl+0x383/0x440 net/socket.c:1020 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+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007fe02692fc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020a54ff0 RSI: 00000000000089a1 RDI: 0000000000000013 RBP: 000000000000057e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6470 R13: 00000000ffffffff R14: 00007fe0269306d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #174 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-executor2/7917: #0: (br_ioctl_mutex){+.+.}, at: [<0000000027aefac4>] sock_ioctl+0x367/0x440 net/socket.c:1018 #1: (rtnl_mutex){+.+.}, at: [<0000000075981ddf>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #2: (rcu_read_lock){....}, at: [<00000000477890f0>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1560 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<0000000016142adc>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<0000000016142adc>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1948 stack backtrace: CPU: 0 PID: 7917 Comm: syz-executor2 Not tainted 4.15.0-rc5+ #174 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+0x27/0x30 net/ipv6/ip6_fib.c:1960 rt6_ifdown+0xd1/0x6a0 net/ipv6/route.c:3490 addrconf_ifdown+0x134/0x14f0 net/ipv6/addrconf.c:3589 addrconf_notify+0x5eb/0x22e0 net/ipv6/addrconf.c:3514 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] rollback_registered_many+0x8b5/0xe20 net/core/dev.c:7308 rollback_registered+0x1be/0x3c0 net/core/dev.c:7350 unregister_netdevice_queue+0x2e3/0x5f0 net/core/dev.c:8343 br_dev_delete+0x138/0x190 net/bridge/br_if.c:320 br_del_bridge+0xac/0xe0 net/bridge/br_if.c:421 br_ioctl_deviceless_stub+0x2ec/0xa00 net/bridge/br_ioctl.c:380 sock_ioctl+0x383/0x440 net/socket.c:1020 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+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007fe02692fc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020a54ff0 RSI: 00000000000089a1 RDI: 0000000000000013 RBP: 000000000000057e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6470 R13: 00000000ffffffff R14: 00007fe0269306d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #174 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-executor2/7917: #0: (br_ioctl_mutex){+.+.}, at: [<0000000027aefac4>] sock_ioctl+0x367/0x440 net/socket.c:1018 #1: (rtnl_mutex){+.+.}, at: [<0000000075981ddf>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #2: (rcu_read_lock){....}, at: [<00000000477890f0>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1560 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<0000000016142adc>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<0000000016142adc>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1948 #4: (&net->ipv6.fib6_walker_lock){++--}, at: [<00000000acc1a5ed>] fib6_del_route net/ipv6/ip6_fib.c:1671 [inline] #4: (&net->ipv6.fib6_walker_lock){++--}, at: [<00000000acc1a5ed>] fib6_del+0x935/0x11b0 net/ipv6/ip6_fib.c:1731 stack backtrace: CPU: 0 PID: 7917 Comm: syz-executor2 Not tainted 4.15.0-rc5+ #174 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+0x27/0x30 net/ipv6/ip6_fib.c:1960 rt6_ifdown+0xd1/0x6a0 net/ipv6/route.c:3490 addrconf_ifdown+0x134/0x14f0 net/ipv6/addrconf.c:3589 addrconf_notify+0x5eb/0x22e0 net/ipv6/addrconf.c:3514 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] rollback_registered_many+0x8b5/0xe20 net/core/dev.c:7308 rollback_registered+0x1be/0x3c0 net/core/dev.c:7350 unregister_netdevice_queue+0x2e3/0x5f0 net/core/dev.c:8343 br_dev_delete+0x138/0x190 net/bridge/br_if.c:320 br_del_bridge+0xac/0xe0 net/bridge/br_if.c:421 br_ioctl_deviceless_stub+0x2ec/0xa00 net/bridge/br_ioctl.c:380 sock_ioctl+0x383/0x440 net/socket.c:1020 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+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007fe02692fc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020a54ff0 RSI: 00000000000089a1 RDI: 0000000000000013 RBP: 000000000000057e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6470 R13: 00000000ffffffff R14: 00007fe0269306d4 R15: 0000000000000000 netlink: 'syz-executor0': attribute type 1 has an invalid length. device lo entered promiscuous mode netlink: 'syz-executor0': attribute type 1 has an invalid length. nla_parse: 13 callbacks suppressed netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor5'. sctp: [Deprecated]: syz-executor3 (pid 8228) Use of int in maxseg socket option. Use struct sctp_assoc_value instead netlink: 40 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor1'. sctp: [Deprecated]: syz-executor3 (pid 8238) Use of int in maxseg socket option. Use struct sctp_assoc_value instead netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. SELinux: unrecognized netlink message: protocol=6 nlmsg_type=40 sclass=netlink_xfrm_socket pig=8383 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=40 sclass=netlink_xfrm_socket pig=8400 comm=syz-executor4 sctp: [Deprecated]: syz-executor2 (pid 8392) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor2 (pid 8409) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead openvswitch: netlink: Message has 6 unknown bytes. openvswitch: netlink: Message has 6 unknown bytes. sctp: [Deprecated]: syz-executor1 (pid 8591) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 8602) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor1 (pid 8591) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 8623) Use of int in maxseg socket option. Use struct sctp_assoc_value instead dccp_invalid_packet: P.Data Offset(29) too large dccp_invalid_packet: P.Data Offset(29) too large IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. sctp: [Deprecated]: syz-executor4 (pid 8933) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 21 bytes leftover after parsing attributes in process `syz-executor3'. sctp: [Deprecated]: syz-executor4 (pid 8933) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 'syz-executor6': attribute type 11 has an invalid length. netlink: 'syz-executor6': attribute type 11 has an invalid length. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9580 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9598 comm=syz-executor3 dccp_invalid_packet: P.Data Offset(0) too small dccp_invalid_packet: P.Data Offset(0) too small SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4134 sclass=netlink_route_socket pig=9707 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4134 sclass=netlink_route_socket pig=9713 comm=syz-executor5 nla_parse: 31 callbacks suppressed netlink: 40 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 4 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 4 bytes leftover after parsing attributes in process `syz-executor6'. device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode netlink: 21 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 21 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 14 bytes leftover after parsing attributes in process `syz-executor6'. openvswitch: netlink: Flow set message rejected, Key attribute missing. netlink: 14 bytes leftover after parsing attributes in process `syz-executor6'. openvswitch: netlink: Flow set message rejected, Key attribute missing. netlink: 'syz-executor6': attribute type 11 has an invalid length. netlink: 'syz-executor6': attribute type 11 has an invalid length. netlink: 17 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 14 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 14 bytes leftover after parsing attributes in process `syz-executor4'.