============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #180 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1704 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-executor0/22465: #0: (rtnl_mutex){+.+.}, at: [<00000000959c9bf1>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000933a09f1>] spin_trylock_bh include/linux/spinlock.h:370 [inline] #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000933a09f1>] fib6_run_gc+0x2b7/0x3c0 net/ipv6/ip6_fib.c:2017 #2: (rcu_read_lock){....}, at: [<00000000ea28abf9>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1562 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000eec1fcb3>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000eec1fcb3>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1957 stack backtrace: CPU: 0 PID: 22465 Comm: syz-executor0 Not tainted 4.15.0-rc5+ #180 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:1703 fib6_clean_node+0x42e/0x580 net/ipv6/ip6_fib.c:1894 fib6_walk_continue+0x46c/0x8a0 net/ipv6/ip6_fib.c:1817 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1865 fib6_clean_tree+0x1e6/0x340 net/ipv6/ip6_fib.c:1942 __fib6_clean_all+0x1f4/0x3a0 net/ipv6/ip6_fib.c:1958 fib6_clean_all net/ipv6/ip6_fib.c:1969 [inline] fib6_run_gc+0x16b/0x3c0 net/ipv6/ip6_fib.c:2025 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_notify_flags+0x262/0x430 net/core/dev.c:6923 dev_change_flags+0xf5/0x140 net/core/dev.c:6957 dev_ifsioc+0x60d/0x9b0 net/core/dev_ioctl.c:257 dev_ioctl+0x2d7/0xfb0 net/core/dev_ioctl.c:566 sock_do_ioctl+0x94/0xb0 net/socket.c:963 sock_ioctl+0x2c2/0x440 net/socket.c:1053 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:00007fce06848c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020f37ffe RSI: 0000000000008914 RDI: 0000000000000013 RBP: 0000000000000573 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6368 R13: 00000000ffffffff R14: 00007fce068496d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #180 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1731 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-executor0/22465: #0: (rtnl_mutex){+.+.}, at: [<00000000959c9bf1>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000933a09f1>] spin_trylock_bh include/linux/spinlock.h:370 [inline] #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000933a09f1>] fib6_run_gc+0x2b7/0x3c0 net/ipv6/ip6_fib.c:2017 #2: (rcu_read_lock){....}, at: [<00000000ea28abf9>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1562 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000eec1fcb3>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000eec1fcb3>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1957 stack backtrace: CPU: 0 PID: 22465 Comm: syz-executor0 Not tainted 4.15.0-rc5+ #180 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:1730 fib6_clean_node+0x42e/0x580 net/ipv6/ip6_fib.c:1894 fib6_walk_continue+0x46c/0x8a0 net/ipv6/ip6_fib.c:1817 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1865 fib6_clean_tree+0x1e6/0x340 net/ipv6/ip6_fib.c:1942 __fib6_clean_all+0x1f4/0x3a0 net/ipv6/ip6_fib.c:1958 fib6_clean_all net/ipv6/ip6_fib.c:1969 [inline] fib6_run_gc+0x16b/0x3c0 net/ipv6/ip6_fib.c:2025 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_notify_flags+0x262/0x430 net/core/dev.c:6923 dev_change_flags+0xf5/0x140 net/core/dev.c:6957 dev_ifsioc+0x60d/0x9b0 net/core/dev_ioctl.c:257 dev_ioctl+0x2d7/0xfb0 net/core/dev_ioctl.c:566 sock_do_ioctl+0x94/0xb0 net/socket.c:963 sock_ioctl+0x2c2/0x440 net/socket.c:1053 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:00007fce06848c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020f37ffe RSI: 0000000000008914 RDI: 0000000000000013 RBP: 0000000000000573 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6368 R13: 00000000ffffffff R14: 00007fce068496d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #180 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1641 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-executor0/22465: #0: (rtnl_mutex){+.+.}, at: [<00000000959c9bf1>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000933a09f1>] spin_trylock_bh include/linux/spinlock.h:370 [inline] #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000933a09f1>] fib6_run_gc+0x2b7/0x3c0 net/ipv6/ip6_fib.c:2017 #2: (rcu_read_lock){....}, at: [<00000000ea28abf9>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1562 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000eec1fcb3>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000eec1fcb3>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1957 stack backtrace: CPU: 0 PID: 22465 Comm: syz-executor0 Not tainted 4.15.0-rc5+ #180 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:1640 [inline] fib6_del+0xd18/0x11b0 net/ipv6/ip6_fib.c:1733 fib6_clean_node+0x42e/0x580 net/ipv6/ip6_fib.c:1894 fib6_walk_continue+0x46c/0x8a0 net/ipv6/ip6_fib.c:1817 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1865 fib6_clean_tree+0x1e6/0x340 net/ipv6/ip6_fib.c:1942 __fib6_clean_all+0x1f4/0x3a0 net/ipv6/ip6_fib.c:1958 fib6_clean_all net/ipv6/ip6_fib.c:1969 [inline] fib6_run_gc+0x16b/0x3c0 net/ipv6/ip6_fib.c:2025 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_notify_flags+0x262/0x430 net/core/dev.c:6923 dev_change_flags+0xf5/0x140 net/core/dev.c:6957 dev_ifsioc+0x60d/0x9b0 net/core/dev_ioctl.c:257 dev_ioctl+0x2d7/0xfb0 net/core/dev_ioctl.c:566 sock_do_ioctl+0x94/0xb0 net/socket.c:963 sock_ioctl+0x2c2/0x440 net/socket.c:1053 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:00007fce06848c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020f37ffe RSI: 0000000000008914 RDI: 0000000000000013 RBP: 0000000000000573 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6368 R13: 00000000ffffffff R14: 00007fce068496d4 R15: 0000000000000000 ============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #180 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1678 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-executor0/22465: #0: (rtnl_mutex){+.+.}, at: [<00000000959c9bf1>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000933a09f1>] spin_trylock_bh include/linux/spinlock.h:370 [inline] #1: (&(&net->ipv6.fib6_gc_lock)->rlock){+.-.}, at: [<00000000933a09f1>] fib6_run_gc+0x2b7/0x3c0 net/ipv6/ip6_fib.c:2017 #2: (rcu_read_lock){....}, at: [<00000000ea28abf9>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1562 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000eec1fcb3>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000eec1fcb3>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1957 #4: (&net->ipv6.fib6_walker_lock){++--}, at: [<0000000088db69e5>] fib6_del_route net/ipv6/ip6_fib.c:1673 [inline] #4: (&net->ipv6.fib6_walker_lock){++--}, at: [<0000000088db69e5>] fib6_del+0x935/0x11b0 net/ipv6/ip6_fib.c:1733 stack backtrace: CPU: 0 PID: 22465 Comm: syz-executor0 Not tainted 4.15.0-rc5+ #180 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:1677 [inline] fib6_del+0xeb3/0x11b0 net/ipv6/ip6_fib.c:1733 fib6_clean_node+0x42e/0x580 net/ipv6/ip6_fib.c:1894 fib6_walk_continue+0x46c/0x8a0 net/ipv6/ip6_fib.c:1817 fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1865 fib6_clean_tree+0x1e6/0x340 net/ipv6/ip6_fib.c:1942 __fib6_clean_all+0x1f4/0x3a0 net/ipv6/ip6_fib.c:1958 fib6_clean_all net/ipv6/ip6_fib.c:1969 [inline] fib6_run_gc+0x16b/0x3c0 net/ipv6/ip6_fib.c:2025 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_notify_flags+0x262/0x430 net/core/dev.c:6923 dev_change_flags+0xf5/0x140 net/core/dev.c:6957 dev_ifsioc+0x60d/0x9b0 net/core/dev_ioctl.c:257 dev_ioctl+0x2d7/0xfb0 net/core/dev_ioctl.c:566 sock_do_ioctl+0x94/0xb0 net/socket.c:963 sock_ioctl+0x2c2/0x440 net/socket.c:1053 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:00007fce06848c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020f37ffe RSI: 0000000000008914 RDI: 0000000000000013 RBP: 0000000000000573 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6368 R13: 00000000ffffffff R14: 00007fce068496d4 R15: 0000000000000000 netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. dccp_v6_rcv: dropped packet with invalid checksum netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. dccp_v6_rcv: dropped packet with invalid checksum netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app dccp_invalid_packet: P.CsCov 15 exceeds packet length 76 dccp_invalid_packet: P.CsCov 15 exceeds packet length 76 device syz6 entered promiscuous mode device syz6 left promiscuous mode nla_parse: 25 callbacks suppressed netlink: 5 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 'syz-executor3': attribute type 1 has an invalid length. netlink: 49 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 49 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 'syz-executor1': attribute type 16 has an invalid length. netlink: 'syz-executor1': attribute type 16 has an invalid length. netlink: 172 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 137 bytes leftover after parsing attributes in process `syz-executor0'. SELinux: unrecognized netlink message: protocol=4 nlmsg_type=28 sclass=netlink_tcpdiag_socket pig=24106 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=28 sclass=netlink_tcpdiag_socket pig=24106 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=0 sclass=netlink_xfrm_socket pig=24385 comm=syz-executor0 dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 nla_parse: 2 callbacks suppressed