================================================================== 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 ffff8801b5c47c60 by task syz-executor0/15809 CPU: 0 PID: 15809 Comm: syz-executor0 Not tainted 4.18.0-rc1+ #13 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+0x37/0x50 mm/kasan/kasan.c:303 memcpy include/linux/string.h:345 [inline] wp384_final+0x93/0xe0 crypto/wp512.c:1105 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 compat_keyctl_dh_compute+0x2d0/0x400 security/keys/compat_dh.c:39 __do_compat_sys_keyctl security/keys/compat.c:136 [inline] __se_compat_sys_keyctl security/keys/compat.c:59 [inline] __ia32_compat_sys_keyctl+0x137/0x3b0 security/keys/compat.c:59 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: 0023:0xf7f52cb9 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:00000000f5f4e0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000120 RAX: ffffffffffffffda RBX: 0000000000000017 RCX: 00000000200003c0 RDX: 00000000200004c0 RSI: 0000000000000067 RDI: 0000000020000600 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 15809: 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 compat_keyctl_dh_compute+0x2d0/0x400 security/keys/compat_dh.c:39 __do_compat_sys_keyctl security/keys/compat.c:136 [inline] __se_compat_sys_keyctl security/keys/compat.c:59 [inline] __ia32_compat_sys_keyctl+0x137/0x3b0 security/keys/compat.c:59 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 6619: 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 __rcu_reclaim kernel/rcu/rcu.h:173 [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+0x1004/0x1850 kernel/rcu/tree.c:2802 __do_softirq+0x2e8/0xb17 kernel/softirq.c:284 The buggy address belongs to the object at ffff8801b5c47c00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 96 bytes inside of 128-byte region [ffff8801b5c47c00, ffff8801b5c47c80) The buggy address belongs to the page: page:ffffea0006d711c0 count:1 mapcount:0 mapping:ffff8801da800640 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0006b5ba08 ffffea00073f5408 ffff8801da800640 raw: 0000000000000000 ffff8801b5c47000 0000000100000015 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b5c47b00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8801b5c47b80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8801b5c47c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc ^ ffff8801b5c47c80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8801b5c47d00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================