netlink: 'syz-executor7': attribute type 62 has an invalid length. ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3829/0x5020 kernel/locking/lockdep.c:3314 Read of size 8 at addr ffff8801833d4490 by task syz-executor0/14876 CPU: 0 PID: 14876 Comm: syz-executor0 Not tainted 4.18.0+ #197 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+0x242/0x30d mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __lock_acquire+0x3829/0x5020 kernel/locking/lockdep.c:3314 lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:334 [inline] vhost_transport_send_pkt+0x12e/0x380 drivers/vhost/vsock.c:223 virtio_transport_send_pkt_info+0x31d/0x460 net/vmw_vsock/virtio_transport_common.c:190 virtio_transport_connect+0x17c/0x220 net/vmw_vsock/virtio_transport_common.c:588 vsock_stream_connect+0x4ed/0xe40 net/vmw_vsock/af_vsock.c:1200 __sys_connect+0x37d/0x4c0 net/socket.c:1662 __do_sys_connect net/socket.c:1673 [inline] __se_sys_connect net/socket.c:1670 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:1670 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4f7f6e7c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f4f7f6e86d4 RCX: 0000000000457089 RDX: 0000000000000010 RSI: 0000000020000200 RDI: 0000000000000006 RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cb658 R14: 00000000004c31b2 R15: 0000000000000001 Allocated by task 14870: 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_node mm/slab.c:3682 [inline] __kmalloc_node+0x47/0x70 mm/slab.c:3689 kmalloc_node include/linux/slab.h:555 [inline] kvmalloc_node+0xb9/0xf0 mm/util.c:423 kvmalloc include/linux/mm.h:576 [inline] vhost_vsock_dev_open+0xa2/0x5a0 drivers/vhost/vsock.c:511 misc_open+0x3ca/0x560 drivers/char/misc.c:141 chrdev_open+0x25a/0x770 fs/char_dev.c:417 do_dentry_open+0x4d5/0x1190 fs/open.c:782 vfs_open+0x12f/0x220 fs/open.c:896 do_last fs/namei.c:3371 [inline] path_openat+0x1076/0x4c90 fs/namei.c:3487 do_filp_open+0x255/0x380 fs/namei.c:3517 do_sys_open+0x584/0x760 fs/open.c:1061 __do_sys_openat fs/open.c:1088 [inline] __se_sys_openat fs/open.c:1082 [inline] __x64_sys_openat+0x9d/0x100 fs/open.c:1082 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 14868: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 kvfree+0x61/0x70 mm/util.c:442 vhost_vsock_free drivers/vhost/vsock.c:499 [inline] vhost_vsock_dev_release+0x4fd/0x750 drivers/vhost/vsock.c:604 __fput+0x39b/0x860 fs/file_table.c:251 ____fput+0x15/0x20 fs/file_table.c:282 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801833cb780 which belongs to the cache kmalloc-65536 of size 65536 The buggy address is located 36112 bytes inside of 65536-byte region [ffff8801833cb780, ffff8801833db780) The buggy address belongs to the page: page:ffffea00060cf000 count:1 mapcount:0 mapping:ffff8801dac02500 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0006448008 ffffea00064ef008 ffff8801dac02500 raw: 0000000000000000 ffff8801833cb780 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801833d4380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801833d4400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801833d4480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801833d4500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801833d4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================