bond0 (unregistering): Released all slaves IPVS: ftp: loaded support on port[0] = 21 ================================================================== BUG: KASAN: use-after-free in rds_tcp_tune+0x491/0x520 net/rds/tcp.c:414 Read of size 4 at addr ffff8801b03754d8 by task kworker/u4:4/259 CPU: 0 PID: 259 Comm: kworker/u4:4 Not tainted 4.16.0-rc6+ #272 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krdsd rds_connect_worker Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x23c/0x360 mm/kasan/report.c:412 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 rds_tcp_tune+0x491/0x520 net/rds/tcp.c:414 rds_tcp_conn_path_connect+0x397/0x940 net/rds/tcp_connect.c:113 rds_connect_worker+0x156/0x1f0 net/rds/threads.c:175 process_one_work+0xc47/0x1bb0 kernel/workqueue.c:2113 worker_thread+0x223/0x1990 kernel/workqueue.c:2247 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Allocated by task 4304: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:552 __do_kmalloc mm/slab.c:3705 [inline] __kmalloc+0x162/0x760 mm/slab.c:3714 kmalloc include/linux/slab.h:517 [inline] kzalloc include/linux/slab.h:701 [inline] ops_init+0x172/0x570 net/core/net_namespace.c:108 setup_net+0x351/0x760 net/core/net_namespace.c:302 copy_net_ns+0x238/0x580 net/core/net_namespace.c:426 create_new_namespaces+0x425/0x880 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:206 SYSC_unshare kernel/fork.c:2407 [inline] SyS_unshare+0x653/0xfa0 kernel/fork.c:2357 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Freed by task 5: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:520 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:527 __cache_free mm/slab.c:3485 [inline] kfree+0xd9/0x260 mm/slab.c:3800 ops_free net/core/net_namespace.c:132 [inline] ops_free_list.part.8+0x27e/0x3e0 net/core/net_namespace.c:154 ops_free_list net/core/net_namespace.c:152 [inline] cleanup_net+0x73f/0xcb0 net/core/net_namespace.c:521 process_one_work+0xc47/0x1bb0 kernel/workqueue.c:2113 worker_thread+0x223/0x1990 kernel/workqueue.c:2247 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 The buggy address belongs to the object at ffff8801b0375480 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 88 bytes inside of 96-byte region [ffff8801b0375480, ffff8801b03754e0) The buggy address belongs to the page: page:ffffea0006c0dd40 count:1 mapcount:0 mapping:ffff8801b0375000 index:0xffff8801b0375f00 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801b0375000 ffff8801b0375f00 000000010000001a raw: ffffea000716f660 ffffea0006f0e4a0 ffff8801dac004c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b0375380: 00 00 00 00 00 00 00 00 02 fc fc fc fc fc fc fc ffff8801b0375400: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8801b0375480: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff8801b0375500: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff8801b0375580: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================