RIP = 0xffffffff811f45f4 RSP = 0xffff88015e067350 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f1e8cd6d700 GSBase=ffff8801daf00000 TRBase=fffffe0000034000 ================================================================== GDTBase=fffffe0000032000 IDTBase=fffffe0000000000 BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:345 [inline] BUG: KASAN: slab-out-of-bounds in wp384_final+0x93/0xe0 crypto/wp512.c:1105 Write of size 48 at addr ffff8801cdce6890 by task syz-executor6/17815 CR0=0000000080050033 CR3=00000001d6bf7000 CR4=00000000001426e0 CPU: 0 PID: 17815 Comm: syz-executor6 Not tainted 4.18.0-rc2+ #116 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Sysenter RSP=fffffe0000033200 CS:RIP=0010:ffffffff87a01380 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** 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 PinBased=0000003f CPUBased=b5986dfa SecondaryExec=000000c2 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 memcpy+0x37/0x50 mm/kasan/kasan.c:303 EntryControls=0000d1ff ExitControls=0023efff memcpy include/linux/string.h:345 [inline] wp384_final+0x93/0xe0 crypto/wp512.c:1105 ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 crypto_shash_final+0x104/0x260 crypto/shash.c:152 VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 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 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffff7b8ab92352 EPT pointer = 0x00000001af5fb01e 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:00007fa3849dfc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 00007fa3849e06d4 RCX: 0000000000455a99 RDX: 00000000200004c0 RSI: 00000000200003c0 RDI: 0000000000000017 RBP: 000000000072bea0 R08: 0000000020000000 R09: 0000000000000000 R10: 0000000000000081 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004bfd68 R14: 00000000004cefb8 R15: 0000000000000000 Allocated by task 17815: 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 16103: 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 free_kthread_struct+0xc7/0xf0 kernel/kthread.c:88 free_task+0x1ac/0x1f0 kernel/fork.c:389 __put_task_struct+0x2e6/0x620 kernel/fork.c:666 put_task_struct include/linux/sched/task.h:96 [inline] delayed_put_task_struct+0x37f/0x490 kernel/exit.c:180 __rcu_reclaim kernel/rcu/rcu.h:178 [inline] rcu_do_batch kernel/rcu/tree.c:2558 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2818 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2785 [inline] rcu_process_callbacks+0xed5/0x1850 kernel/rcu/tree.c:2802 __do_softirq+0x2e8/0xb17 kernel/softirq.c:288 The buggy address belongs to the object at ffff8801cdce6800 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 144 bytes inside of 192-byte region [ffff8801cdce6800, ffff8801cdce68c0) The buggy address belongs to the page: page:ffffea0007373980 count:1 mapcount:0 mapping:ffff8801da800040 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea000734fd48 ffffea00075f7588 ffff8801da800040 raw: 0000000000000000 ffff8801cdce6000 0000000100000010 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cdce6780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8801cdce6800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801cdce6880: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ^ ffff8801cdce6900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801cdce6980: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================