selinux_nlmsg_perm: 2324 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65380 sclass=netlink_route_socket pig=3 comm=kworker/0:0 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline] BUG: KASAN: slab-out-of-bounds in pdu_read+0x90/0xd0 net/9p/protocol.c:64 Read of size 65502 at addr ffff888061529ded by task syz-executor.5/16551 CPU: 1 PID: 16551 Comm: syz-executor.5 Not tainted 4.14.144 #0 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+0x138/0x197 lib/dump_stack.c:53 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x123/0x190 mm/kasan/kasan.c:267 memcpy+0x24/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:347 [inline] pdu_read+0x90/0xd0 net/9p/protocol.c:64 p9pdu_vreadf net/9p/protocol.c:167 [inline] p9pdu_readf+0x379/0x1780 net/9p/protocol.c:540 p9_client_version net/9p/client.c:990 [inline] p9_client_create+0xa1f/0x1120 net/9p/client.c:1088 v9fs_session_init+0x1dc/0x1620 fs/9p/v9fs.c:422 v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135 mount_fs+0x97/0x2a1 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4598e9 RSP: 002b:00007f5bc530cc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004598e9 RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000020000100 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5bc530d6d4 R13: 00000000004c5e68 R14: 00000000004da9b0 R15: 00000000ffffffff Allocated by task 16551: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15d/0x7a0 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] p9_fcall_alloc+0x1d/0x90 net/9p/client.c:242 p9_tag_alloc net/9p/client.c:312 [inline] p9_client_prepare_req.part.0+0x73a/0xa90 net/9p/client.c:728 p9_client_prepare_req net/9p/client.c:718 [inline] p9_client_rpc+0x170/0x1180 net/9p/client.c:763 p9_client_version net/9p/client.c:980 [inline] p9_client_create+0x997/0x1120 net/9p/client.c:1088 v9fs_session_init+0x1dc/0x1620 fs/9p/v9fs.c:422 v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135 mount_fs+0x97/0x2a1 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 25: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcc/0x270 mm/slab.c:3815 ops_free net/core/net_namespace.c:132 [inline] ops_free_list.part.0+0x1f6/0x320 net/core/net_namespace.c:154 ops_free_list net/core/net_namespace.c:152 [inline] cleanup_net+0x458/0x880 net/core/net_namespace.c:488 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 The buggy address belongs to the object at ffff888061529dc0 which belongs to the cache kmalloc-16384 of size 16384 The buggy address is located 45 bytes inside of 16384-byte region [ffff888061529dc0, ffff88806152ddc0) The buggy address belongs to the page: kobject: 'loop4' (ffff8880a4a3cae0): kobject_uevent_env page:ffffea0001854a00 count:1 mapcount:0 mapping:ffff888061529dc0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000008100(slab|head) raw: 01fffc0000008100 ffff888061529dc0 0000000000000000 0000000100000001 raw: ffffea0002264420 ffffea000297d620 ffff8880aa802200 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88806152bc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806152bd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88806152bd80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ^ ffff88806152be00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806152be80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================