team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves ============================= WARNING: suspicious RCU usage 4.14.232-syzkaller #0 Not tainted ----------------------------- include/net/sock.h:1800 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 4 locks held by kworker/u4:2/40: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091 befs: (loop5): No write support. Marking filesystem read-only befs: (loop5): invalid magic header #2: (net_mutex){+.+.}, at: [] cleanup_net+0x110/0x840 net/core/net_namespace.c:450 #3: (rtnl_mutex){+.+.}, at: [] netdev_run_todo+0x20e/0xad0 net/core/dev.c:7926 stack backtrace: CPU: 0 PID: 40 Comm: kworker/u4:2 Not tainted 4.14.232-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 __sk_dst_set include/net/sock.h:1800 [inline] __sk_dst_reset include/net/sock.h:1820 [inline] tcp_disconnect+0x1412/0x1890 net/ipv4/tcp.c:2383 rds_tcp_conn_paths_destroy net/rds/tcp.c:515 [inline] rds_tcp_kill_sock net/rds/tcp.c:544 [inline] rds_tcp_dev_event+0x73f/0xa30 net/rds/tcp.c:573 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] netdev_run_todo+0x242/0xad0 net/core/dev.c:7927 default_device_exit_batch+0x2e2/0x380 net/core/dev.c:8747 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:145 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:484 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop2): __ext4_new_inode:930: comm syz-executor.2: reserved inode found cleared - inode=1 ================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51 Read of size 8 at addr ffff8880a03fba60 by task kworker/u4:2/40 CPU: 0 PID: 40 Comm: kworker/u4:2 Not tainted 4.14.232-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430 __list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51 __list_del_entry include/linux/list.h:117 [inline] list_del include/linux/list.h:125 [inline] rds_tcp_conn_free+0x84/0x1c0 net/rds/tcp.c:310 rds_conn_path_destroy net/rds/connection.c:408 [inline] rds_conn_destroy+0x4b3/0x730 net/rds/connection.c:439 rds_tcp_kill_sock net/rds/tcp.c:545 [inline] rds_tcp_dev_event+0x79a/0xa30 net/rds/tcp.c:573 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] netdev_run_todo+0x242/0xad0 net/core/dev.c:7927 default_device_exit_batch+0x2e2/0x380 net/core/dev.c:8747 EXT4-fs error (device loop2): __ext4_new_inode:930: comm syz-executor.2: reserved inode found cleared - inode=1 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:145 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:484 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Allocated by task 5: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc+0x124/0x3c0 mm/slab.c:3552 rds_tcp_conn_alloc+0x4d/0x290 net/rds/tcp.c:279 __rds_conn_create+0xc92/0x16f0 net/rds/connection.c:223 rds_tcp_accept_one+0x2d9/0x8b0 net/rds/tcp_listen.c:171 rds_tcp_accept_worker+0x4d/0x70 net/rds/tcp.c:407 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Freed by task 40: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kmem_cache_free+0x7c/0x2b0 mm/slab.c:3758 rds_conn_path_destroy net/rds/connection.c:408 [inline] rds_conn_destroy+0x4b3/0x730 net/rds/connection.c:439 rds_tcp_kill_sock net/rds/tcp.c:545 [inline] rds_tcp_dev_event+0x79a/0xa30 net/rds/tcp.c:573 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] netdev_run_todo+0x242/0xad0 net/core/dev.c:7927 default_device_exit_batch+0x2e2/0x380 net/core/dev.c:8747 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:145 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:484 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 The buggy address belongs to the object at ffff8880a03fba60 which belongs to the cache rds_tcp_connection of size 504 The buggy address is located 0 bytes inside of 504-byte region [ffff8880a03fba60, ffff8880a03fbc58) The buggy address belongs to the page: page:ffffea000280fec0 count:1 mapcount:0 mapping:ffff8880a03fb080 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880a03fb080 0000000000000000 0000000100000006 raw: ffffea00027ed220 ffffea0002cea960 ffff8882355f39c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a03fb900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a03fb980: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880a03fba00: fc fc fc fc fc fc fc fc fc fc fc fc fb fb fb fb ^ ffff8880a03fba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a03fbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================