IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:345 [inline] BUG: KASAN: slab-out-of-bounds in pdu_read+0x90/0xd0 net/9p/protocol.c:59 Read of size 65409 at addr ffff8801ce27b22d by task syz-executor0/4904 CPU: 1 PID: 4904 Comm: syz-executor0 Not tainted 4.18.0-rc3+ #40 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 memcpy+0x23/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:345 [inline] pdu_read+0x90/0xd0 net/9p/protocol.c:59 p9pdu_vreadf net/9p/protocol.c:162 [inline] p9pdu_readf+0x579/0x2170 net/9p/protocol.c:536 p9_client_version net/9p/client.c:986 [inline] p9_client_create+0xde0/0x16c9 net/9p/client.c:1069 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 mount_fs+0xae/0x328 fs/super.c:1277 vfs_kern_mount.part.34+0xdc/0x4e0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2518 [inline] do_mount+0x581/0x30e0 fs/namespace.c:2848 __do_compat_sys_mount fs/compat.c:125 [inline] __se_compat_sys_mount fs/compat.c:92 [inline] __ia32_compat_sys_mount+0x5d5/0x860 fs/compat.c:92 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fa3cb9 Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000ffdcfb0c EFLAGS: 00000282 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000080 RDX: 00000000200000c0 RSI: 0000000000000000 RDI: 0000000020000380 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 4904: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x14e/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:518 [inline] p9_fcall_alloc+0x1e/0x90 net/9p/client.c:236 p9_tag_alloc net/9p/client.c:306 [inline] p9_client_prepare_req.part.8+0x754/0xcd0 net/9p/client.c:722 p9_client_prepare_req net/9p/client.c:757 [inline] p9_client_rpc+0x1bd/0x1400 net/9p/client.c:757 p9_client_version net/9p/client.c:976 [inline] p9_client_create+0xd09/0x16c9 net/9p/client.c:1069 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 mount_fs+0xae/0x328 fs/super.c:1277 vfs_kern_mount.part.34+0xdc/0x4e0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2518 [inline] do_mount+0x581/0x30e0 fs/namespace.c:2848 __do_compat_sys_mount fs/compat.c:125 [inline] __se_compat_sys_mount fs/compat.c:92 [inline] __ia32_compat_sys_mount+0x5d5/0x860 fs/compat.c:92 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801ce27b200 which belongs to the cache kmalloc-16384 of size 16384 The buggy address is located 45 bytes inside of 16384-byte region [ffff8801ce27b200, ffff8801ce27f200) The buggy address belongs to the page: page:ffffea0007389e00 count:1 mapcount:0 mapping:ffff8801da802200 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0007370808 ffff8801da801c48 ffff8801da802200 raw: 0000000000000000 ffff8801ce27b200 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ce27d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801ce27d180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801ce27d200: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801ce27d280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801ce27d300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================