netlink: 12 bytes leftover after parsing attributes in process `syz-executor2'. ================================================================== BUG: KASAN: slab-out-of-bounds in put_unaligned_be32 include/linux/unaligned/access_ok.h:60 [inline] BUG: KASAN: slab-out-of-bounds in sha1_base_finish include/crypto/sha1_base.h:102 [inline] BUG: KASAN: slab-out-of-bounds in sha1_finup+0x44e/0x4b0 arch/x86/crypto/sha1_ssse3_glue.c:70 Write of size 4 at addr ffff8801d6b5d1d8 by task syz-executor0/10958 CPU: 0 PID: 10958 Comm: syz-executor0 Not tainted 4.18.0-rc2+ #117 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 __asan_report_store4_noabort+0x17/0x20 mm/kasan/report.c:437 put_unaligned_be32 include/linux/unaligned/access_ok.h:60 [inline] sha1_base_finish include/crypto/sha1_base.h:102 [inline] sha1_finup+0x44e/0x4b0 arch/x86/crypto/sha1_ssse3_glue.c:70 sha1_avx_finup arch/x86/crypto/sha1_ssse3_glue.c:140 [inline] sha1_avx_final+0x28/0x30 arch/x86/crypto/sha1_ssse3_glue.c:146 crypto_shash_final+0x104/0x260 crypto/shash.c:152 kdf_ctr security/keys/dh.c:186 [inline] keyctl_dh_compute_kdf security/keys/dh.c:217 [inline] __keyctl_dh_compute+0x1198/0x1be0 security/keys/dh.c:389 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:425 __do_sys_keyctl security/keys/keyctl.c:1741 [inline] __se_sys_keyctl security/keys/keyctl.c:1637 [inline] __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a99 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fda19896c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007fda198976d4 RCX: 0000000000455a99 RDX: 0000000020a53ffb RSI: 0000000020000100 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 0000000020000140 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bfd68 R14: 00000000004cefb8 R15: 0000000000000000 Allocated by task 10958: 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] keyctl_dh_compute_kdf security/keys/dh.c:211 [inline] __keyctl_dh_compute+0x1000/0x1be0 security/keys/dh.c:389 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:425 __do_sys_keyctl security/keys/keyctl.c:1741 [inline] __se_sys_keyctl security/keys/keyctl.c:1637 [inline] __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9498: 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 kvm_arch_free_memslot+0x85/0x270 arch/x86/kvm/x86.c:8872 kvm_free_memslot+0xb8/0x110 arch/x86/kvm/../../../virt/kvm/kvm_main.c:554 kvm_free_memslots+0x99/0x100 arch/x86/kvm/../../../virt/kvm/kvm_main.c:567 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:749 [inline] kvm_put_kvm+0xa05/0x1060 arch/x86/kvm/../../../virt/kvm/kvm_main.c:767 kvm_vm_release+0x42/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:778 __fput+0x35b/0x8b0 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1b08/0x2750 kernel/exit.c:865 do_group_exit+0x177/0x440 kernel/exit.c:968 get_signal+0x88e/0x1970 kernel/signal.c:2468 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e0/0x370 arch/x86/entry/common.c:162 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 ffff8801d6b5d1c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff8801d6b5d1c0, ffff8801d6b5d1e0) The buggy address belongs to the page: page:ffffea00075ad740 count:1 mapcount:0 mapping:ffff8801da8001c0 index:0xffff8801d6b5dfc1 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea00074b8208 ffffea00075bbf88 ffff8801da8001c0 raw: ffff8801d6b5dfc1 ffff8801d6b5d000 000000010000002a 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d6b5d080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801d6b5d100: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8801d6b5d180: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc ^ ffff8801d6b5d200: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801d6b5d280: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================