QAT: Invalid ioctl ================================================================== BUG: KASAN: slab-out-of-bounds in asn1_ber_decoder+0x1436/0x1c20 lib/asn1_decoder.c:233 Read of size 1 at addr ffff8801c42fc042 by task syz-executor6/11776 CPU: 0 PID: 11776 Comm: syz-executor6 Not tainted 4.14.0-rc5-mm1+ #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x25b/0x340 mm/kasan/report.c:409 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:427 asn1_ber_decoder+0x1436/0x1c20 lib/asn1_decoder.c:233 x509_cert_parse+0x1dd/0x680 crypto/asymmetric_keys/x509_cert_parser.c:89 x509_key_preparse+0x64/0x8b0 crypto/asymmetric_keys/x509_public_key.c:174 asymmetric_key_preparse+0xa8/0x110 crypto/asymmetric_keys/asymmetric_type.c:386 key_create_or_update+0x4c6/0xe20 security/keys/key.c:846 SYSC_add_key security/keys/keyctl.c:122 [inline] SyS_add_key+0x18a/0x340 security/keys/keyctl.c:62 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x452869 RSP: 002b:00007f53ad51dbe8 EFLAGS: 00000212 ORIG_RAX: 00000000000000f8 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452869 RDX: 0000000020ce1000 RSI: 0000000020ef2ffb RDI: 0000000020b79000 RBP: 0000000000000082 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a6f7ff R14: 00007f53ad51e9c0 R15: 0000000000000000 Allocated by task 11776: 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:551 __do_kmalloc_node mm/slab.c:3676 [inline] __kmalloc_node+0x47/0x70 mm/slab.c:3683 kmalloc_node include/linux/slab.h:541 [inline] kvmalloc_node+0x99/0xd0 mm/util.c:397 kvmalloc include/linux/mm.h:538 [inline] SYSC_add_key security/keys/keyctl.c:104 [inline] SyS_add_key+0x279/0x340 security/keys/keyctl.c:62 entry_SYSCALL_64_fastpath+0x1f/0xbe Freed by task 9839: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3492 [inline] kfree+0xca/0x250 mm/slab.c:3807 kvm_destroy_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:558 [inline] kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:708 [inline] kvm_put_kvm+0x28e/0xde0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:748 kvm_vm_release+0x42/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:759 __fput+0x327/0x7e0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:244 task_work_run+0x199/0x270 kernel/task_work.c:112 exit_task_work include/linux/task_work.h:21 [inline] do_exit+0x9b5/0x1ad0 kernel/exit.c:869 do_group_exit+0x149/0x400 kernel/exit.c:972 get_signal+0x73f/0x16d0 kernel/signal.c:2333 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808 exit_to_usermode_loop+0x214/0x310 arch/x86/entry/common.c:158 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath+0x42f/0x510 arch/x86/entry/common.c:266 entry_SYSCALL_64_fastpath+0xbc/0xbe The buggy address belongs to the object at ffff8801c42fc040 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 2 bytes inside of 32-byte region [ffff8801c42fc040, ffff8801c42fc060) The buggy address belongs to the page: page:ffffea000710bf00 count:1 mapcount:0 mapping:ffff8801c42fc000 index:0xffff8801c42fcfc1 flags: 0x200000000000100(slab) raw: 0200000000000100 ffff8801c42fc000 ffff8801c42fcfc1 000000010000003c raw: ffffea00073a40e0 ffffea00070c7760 ffff8801dac001c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c42fbf00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8801c42fbf80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8801c42fc000: fb fb fb fb fc fc fc fc 02 fc fc fc fc fc fc fc ^ ffff8801c42fc080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801c42fc100: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc ==================================================================