============================= WARNING: suspicious RCU usage 4.15.0-rc5+ #180 Not tainted ----------------------------- net/ipv6/ip6_fib.c:1704 suspicious rcu_dereference_protected() usage! FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 15312 Comm: syz-executor5 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3608 kmalloc include/linux/slab.h:499 [inline] sctp_datamsg_new net/sctp/chunk.c:65 [inline] sctp_datamsg_from_user+0x12a/0x1210 net/sctp/chunk.c:176 sctp_sendmsg+0x1db8/0x33f0 net/sctp/socket.c:2040 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 sock_write_iter+0x31a/0x5d0 net/socket.c:907 call_write_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x525/0x7f0 fs/read_write.c:653 do_iter_write+0x154/0x540 fs/read_write.c:932 vfs_writev+0x18a/0x340 fs/read_write.c:977 do_writev+0xfc/0x2a0 fs/read_write.c:1012 SYSC_writev fs/read_write.c:1085 [inline] SyS_writev+0x27/0x30 fs/read_write.c:1082 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007ff45e1c2c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ff45e1c2aa0 RCX: 0000000000452ac9 RDX: 0000000000000001 RSI: 0000000020ba4fe0 RDI: 0000000000000013 RBP: 00007ff45e1c2a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007ff45e1c2bc8 R14: 00000000004b767a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 15335 Comm: syz-executor5 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3289 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3632 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:983 [inline] _sctp_make_chunk+0x3b/0x260 net/sctp/sm_make_chunk.c:1386 sctp_make_data net/sctp/sm_make_chunk.c:1418 [inline] sctp_make_datafrag_empty+0x1c1/0x2e0 net/sctp/sm_make_chunk.c:742 sctp_datamsg_from_user+0x7dc/0x1210 net/sctp/chunk.c:267 sctp_sendmsg+0x1db8/0x33f0 net/sctp/socket.c:2040 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 sock_write_iter+0x31a/0x5d0 net/socket.c:907 call_write_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x525/0x7f0 fs/read_write.c:653 do_iter_write+0x154/0x540 fs/read_write.c:932 vfs_writev+0x18a/0x340 fs/read_write.c:977 do_writev+0xfc/0x2a0 fs/read_write.c:1012 SYSC_writev fs/read_write.c:1085 [inline] SyS_writev+0x27/0x30 fs/read_write.c:1082 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007ff45e1c2c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ff45e1c2aa0 RCX: 0000000000452ac9 RDX: 0000000000000001 RSI: 0000000020ba4fe0 RDI: 0000000000000013 RBP: 00007ff45e1c2a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007ff45e1c2bc8 R14: 00000000004b767a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 15352 Comm: syz-executor5 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3289 [inline] kmem_cache_alloc_node_trace+0x5a/0x750 mm/slab.c:3651 __do_kmalloc_node mm/slab.c:3671 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3686 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:983 [inline] _sctp_make_chunk+0x3b/0x260 net/sctp/sm_make_chunk.c:1386 sctp_make_data net/sctp/sm_make_chunk.c:1418 [inline] sctp_make_datafrag_empty+0x1c1/0x2e0 net/sctp/sm_make_chunk.c:742 sctp_datamsg_from_user+0x7dc/0x1210 net/sctp/chunk.c:267 sctp_sendmsg+0x1db8/0x33f0 net/sctp/socket.c:2040 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 sock_write_iter+0x31a/0x5d0 net/socket.c:907 call_write_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x525/0x7f0 fs/read_write.c:653 do_iter_write+0x154/0x540 fs/read_write.c:932 vfs_writev+0x18a/0x340 fs/read_write.c:977 do_writev+0xfc/0x2a0 fs/read_write.c:1012 SYSC_writev fs/read_write.c:1085 [inline] SyS_writev+0x27/0x30 fs/read_write.c:1082 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007ff45e1c2c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ff45e1c2aa0 RCX: 0000000000452ac9 RDX: 0000000000000001 RSI: 0000000020ba4fe0 RDI: 0000000000000013 RBP: 00007ff45e1c2a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007ff45e1c2bc8 R14: 00000000004b767a R15: 0000000000000000 other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 4 locks held by syz-executor6/15303: #0: (br_ioctl_mutex){+.+.}, at: [<000000007ce530fe>] sock_ioctl+0x367/0x440 net/socket.c:1018 #1: (rtnl_mutex){+.+.}, at: [<00000000ecaebc25>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #2: (rcu_read_lock){....}, at: [<0000000071ae4635>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1562 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000dc0c812a>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000dc0c812a>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1957 stack backtrace: CPU: 0 PID: 15303 Comm: syz-executor6 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+0x27/0x30 net/ipv6/ip6_fib.c:1969 rt6_sync_down_dev net/ipv6/route.c:3611 [inline] rt6_disable_ip+0xfd/0x700 net/ipv6/route.c:3616 addrconf_ifdown+0x14b/0x14f0 net/ipv6/addrconf.c:3595 addrconf_notify+0x5f8/0x2310 net/ipv6/addrconf.c:3519 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:7335 rollback_registered+0x1be/0x3c0 net/core/dev.c:7377 unregister_netdevice_queue+0x2e3/0x5f0 net/core/dev.c:8392 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:00007fa705469c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020ec4ff0 RSI: 00000000000089a1 RDI: 0000000000000013 RBP: 0000000000000314 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2a80 R13: 00000000ffffffff R14: 00007fa70546a6d4 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-executor6/15303: #0: (br_ioctl_mutex){+.+.}, at: [<000000007ce530fe>] sock_ioctl+0x367/0x440 net/socket.c:1018 #1: (rtnl_mutex){+.+.}, at: [<00000000ecaebc25>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #2: (rcu_read_lock){....}, at: [<0000000071ae4635>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1562 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000dc0c812a>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000dc0c812a>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1957 stack backtrace: CPU: 0 PID: 15303 Comm: syz-executor6 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+0x27/0x30 net/ipv6/ip6_fib.c:1969 rt6_sync_down_dev net/ipv6/route.c:3611 [inline] rt6_disable_ip+0xfd/0x700 net/ipv6/route.c:3616 addrconf_ifdown+0x14b/0x14f0 net/ipv6/addrconf.c:3595 addrconf_notify+0x5f8/0x2310 net/ipv6/addrconf.c:3519 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:7335 rollback_registered+0x1be/0x3c0 net/core/dev.c:7377 unregister_netdevice_queue+0x2e3/0x5f0 net/core/dev.c:8392 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:00007fa705469c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020ec4ff0 RSI: 00000000000089a1 RDI: 0000000000000013 RBP: 0000000000000314 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2a80 R13: 00000000ffffffff R14: 00007fa70546a6d4 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-executor6/15303: #0: (br_ioctl_mutex){+.+.}, at: [<000000007ce530fe>] sock_ioctl+0x367/0x440 net/socket.c:1018 #1: (rtnl_mutex){+.+.}, at: [<00000000ecaebc25>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #2: (rcu_read_lock){....}, at: [<0000000071ae4635>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1562 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000dc0c812a>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000dc0c812a>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1957 stack backtrace: CPU: 0 PID: 15303 Comm: syz-executor6 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+0x27/0x30 net/ipv6/ip6_fib.c:1969 rt6_sync_down_dev net/ipv6/route.c:3611 [inline] rt6_disable_ip+0xfd/0x700 net/ipv6/route.c:3616 addrconf_ifdown+0x14b/0x14f0 net/ipv6/addrconf.c:3595 addrconf_notify+0x5f8/0x2310 net/ipv6/addrconf.c:3519 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:7335 rollback_registered+0x1be/0x3c0 net/core/dev.c:7377 unregister_netdevice_queue+0x2e3/0x5f0 net/core/dev.c:8392 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:00007fa705469c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020ec4ff0 RSI: 00000000000089a1 RDI: 0000000000000013 RBP: 0000000000000314 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2a80 R13: 00000000ffffffff R14: 00007fa70546a6d4 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-executor6/15303: #0: (br_ioctl_mutex){+.+.}, at: [<000000007ce530fe>] sock_ioctl+0x367/0x440 net/socket.c:1018 #1: (rtnl_mutex){+.+.}, at: [<00000000ecaebc25>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #2: (rcu_read_lock){....}, at: [<0000000071ae4635>] __fib6_clean_all+0x0/0x3a0 net/ipv6/ip6_fib.c:1562 #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000dc0c812a>] spin_lock_bh include/linux/spinlock.h:315 [inline] #3: (&(&tb->tb6_lock)->rlock){+.-.}, at: [<00000000dc0c812a>] __fib6_clean_all+0x1d0/0x3a0 net/ipv6/ip6_fib.c:1957 #4: (&net->ipv6.fib6_walker_lock){++--}, at: [<0000000094c28245>] fib6_del_route net/ipv6/ip6_fib.c:1673 [inline] #4: (&net->ipv6.fib6_walker_lock){++--}, at: [<0000000094c28245>] fib6_del+0x935/0x11b0 net/ipv6/ip6_fib.c:1733 stack backtrace: CPU: 0 PID: 15303 Comm: syz-executor6 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+0x27/0x30 net/ipv6/ip6_fib.c:1969 rt6_sync_down_dev net/ipv6/route.c:3611 [inline] rt6_disable_ip+0xfd/0x700 net/ipv6/route.c:3616 addrconf_ifdown+0x14b/0x14f0 net/ipv6/addrconf.c:3595 addrconf_notify+0x5f8/0x2310 net/ipv6/addrconf.c:3519 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:7335 rollback_registered+0x1be/0x3c0 net/core/dev.c:7377 unregister_netdevice_queue+0x2e3/0x5f0 net/core/dev.c:8392 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:00007fa705469c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000020ec4ff0 RSI: 00000000000089a1 RDI: 0000000000000013 RBP: 0000000000000314 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2a80 R13: 00000000ffffffff R14: 00007fa70546a6d4 R15: 0000000000000000 netlink: 17 bytes leftover after parsing attributes in process `syz-executor4'. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 15364 Comm: syz-executor5 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 netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3542 kmem_cache_zalloc include/linux/slab.h:678 [inline] sctp_chunkify+0xce/0x3f0 net/sctp/sm_make_chunk.c:1329 _sctp_make_chunk+0x13c/0x260 net/sctp/sm_make_chunk.c:1397 sctp_make_data net/sctp/sm_make_chunk.c:1418 [inline] sctp_make_datafrag_empty+0x1c1/0x2e0 net/sctp/sm_make_chunk.c:742 sctp_datamsg_from_user+0x7dc/0x1210 net/sctp/chunk.c:267 sctp_sendmsg+0x1db8/0x33f0 net/sctp/socket.c:2040 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 sock_write_iter+0x31a/0x5d0 net/socket.c:907 call_write_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x525/0x7f0 fs/read_write.c:653 do_iter_write+0x154/0x540 fs/read_write.c:932 vfs_writev+0x18a/0x340 fs/read_write.c:977 do_writev+0xfc/0x2a0 fs/read_write.c:1012 SYSC_writev fs/read_write.c:1085 [inline] SyS_writev+0x27/0x30 fs/read_write.c:1082 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007ff45e1c2c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ff45e1c2aa0 RCX: 0000000000452ac9 RDX: 0000000000000001 RSI: 0000000020ba4fe0 RDI: 0000000000000013 RBP: 00007ff45e1c2a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007ff45e1c2bc8 R14: 00000000004b767a R15: 0000000000000000 netlink: 14 bytes leftover after parsing attributes in process `syz-executor0'. tc_dump_action: action bad kind netlink: 14 bytes leftover after parsing attributes in process `syz-executor0'. tc_dump_action: action bad kind SELinux: unrecognized netlink message: protocol=4 nlmsg_type=33 sclass=netlink_tcpdiag_socket pig=15580 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=33 sclass=netlink_tcpdiag_socket pig=15594 comm=syz-executor2 sctp: [Deprecated]: syz-executor2 (pid 15696) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor2 (pid 15706) Use of int in maxseg socket option. Use struct sctp_assoc_value instead netlink: 43 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 43 bytes leftover after parsing attributes in process `syz-executor0'. 8021q: VLANs not supported on lo 8021q: VLANs not supported on lo netlink: 49 bytes leftover after parsing attributes in process `syz-executor0'. SELinux: unrecognized netlink message: protocol=6 nlmsg_type=0 sclass=netlink_xfrm_socket pig=15848 comm=syz-executor4 netlink: 49 bytes leftover after parsing attributes in process `syz-executor0'. SELinux: unrecognized netlink message: protocol=6 nlmsg_type=0 sclass=netlink_xfrm_socket pig=15848 comm=syz-executor4 netlink: 11 bytes leftover after parsing attributes in process `syz-executor3'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=27 sclass=netlink_route_socket pig=16048 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=27 sclass=netlink_route_socket pig=16063 comm=syz-executor4 netlink: 'syz-executor3': attribute type 1 has an invalid length. dccp_v4_rcv: dropped packet with invalid checksum dccp_v4_rcv: dropped packet with invalid checksum do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app nla_parse: 9 callbacks suppressed netlink: 11 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor4'. sctp: [Deprecated]: syz-executor1 (pid 16904) Use of int in max_burst socket option. Use struct sctp_assoc_value instead