SELinux: unrecognized netlink message: protocol=0 nlmsg_type=770 sclass=netlink_route_socket pig=10711 comm=syz-executor6 ================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [inline] BUG: KASAN: use-after-free in atomic_read arch/x86/include/asm/atomic.h:27 [inline] BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:42 [inline] BUG: KASAN: use-after-free in check_net include/net/net_namespace.h:228 [inline] BUG: KASAN: use-after-free in rds_destroy_pending net/rds/rds.h:868 [inline] BUG: KASAN: use-after-free in rds_cong_queue_updates+0x4d2/0x4f0 net/rds/cong.c:226 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=770 sclass=netlink_route_socket pig=10711 comm=syz-executor6 Read of size 4 at addr ffff8801ce89e204 by task syz-executor4/10712 CPU: 0 PID: 10712 Comm: syz-executor4 Not tainted 4.16.0-rc2+ #232 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 print_address_description+0x73/0x250 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x23b/0x360 mm/kasan/report.c:412 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 __read_once_size include/linux/compiler.h:183 [inline] atomic_read arch/x86/include/asm/atomic.h:27 [inline] refcount_read include/linux/refcount.h:42 [inline] check_net include/net/net_namespace.h:228 [inline] rds_destroy_pending net/rds/rds.h:868 [inline] rds_cong_queue_updates+0x4d2/0x4f0 net/rds/cong.c:226 rds_recv_rcvbuf_delta.part.2+0x289/0x320 net/rds/recv.c:118 rds_recv_rcvbuf_delta net/rds/recv.c:377 [inline] rds_recv_incoming+0xeb4/0x11d0 net/rds/recv.c:377 rds_loop_xmit+0x149/0x320 net/rds/loop.c:82 rds_send_xmit+0xbcc/0x26b0 net/rds/send.c:355 rds_sendmsg+0x1fcb/0x2390 net/rds/send.c:1208 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 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 RIP: 0023:0xf7f85c79 RSP: 002b:00000000f778109c EFLAGS: 00000286 ORIG_RAX: 0000000000000171 RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000020fc2000 RDX: 0000000000000480 RSI: 0000000000000000 RDI: 000000002069affb RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 4220: 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 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3541 kmem_cache_zalloc include/linux/slab.h:691 [inline] net_alloc net/core/net_namespace.c:369 [inline] copy_net_ns+0x152/0x580 net/core/net_namespace.c:409 create_new_namespaces+0x425/0x880 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:206 SYSC_unshare kernel/fork.c:2418 [inline] SyS_unshare+0x653/0xfa0 kernel/fork.c:2368 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] kmem_cache_free+0x83/0x2a0 mm/slab.c:3743 net_free+0xca/0x110 net/core/net_namespace.c:385 net_drop_ns.part.11+0x26/0x30 net/core/net_namespace.c:392 net_drop_ns net/core/net_namespace.c:391 [inline] cleanup_net+0x977/0xcb0 net/core/net_namespace.c:535 process_one_work+0xbbf/0x1af0 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:407 The buggy address belongs to the object at ffff8801ce89e200 which belongs to the cache net_namespace of size 6720 The buggy address is located 4 bytes inside of 6720-byte region [ffff8801ce89e200, ffff8801ce89fc40) The buggy address belongs to the page: page:ffffea00073a2780 count:1 mapcount:0 mapping:ffff8801ce89e200 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801ce89e200 0000000000000000 0000000100000001 raw: ffffea0006c361a0 ffffea00073334a0 ffff8801d9feae00 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ce89e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801ce89e180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801ce89e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801ce89e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801ce89e300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================