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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 sha256_base_finish include/crypto/sha256_base.h:124 [inline]
BUG: KASAN: slab-out-of-bounds in sha256_finup+0x4bf/0x540 arch/x86/crypto/sha256_ssse3_glue.c:80
Write of size 4 at addr ffff8801b97d951c by task syz-executor6/19714

CPU: 0 PID: 19714 Comm: syz-executor6 Not tainted 4.18.0-rc2+ #20
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]
 sha256_base_finish include/crypto/sha256_base.h:124 [inline]
 sha256_finup+0x4bf/0x540 arch/x86/crypto/sha256_ssse3_glue.c:80
 sha256_avx2_finup arch/x86/crypto/sha256_ssse3_glue.c:245 [inline]
 sha256_avx2_final+0x28/0x30 arch/x86/crypto/sha256_ssse3_glue.c:250
 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: 0023:0xf7f20cb9
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:00000000f5f1c0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000120
RAX: ffffffffffffffda RBX: 0000000000000017 RCX: 0000000020000240
RDX: 0000000020000280 RSI: 00000000000000d2 RDI: 00000000200003c0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 19714:
 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 14584:
 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
 iter_file_splice_write+0x78d/0x1010 fs/splice.c:777
 do_splice_from fs/splice.c:852 [inline]
 direct_splice_actor+0x128/0x190 fs/splice.c:1019
 splice_direct_to_actor+0x318/0x8f0 fs/splice.c:974
 do_splice_direct+0x2d4/0x420 fs/splice.c:1062
 do_sendfile+0x623/0xe20 fs/read_write.c:1440
 __do_compat_sys_sendfile fs/read_write.c:1516 [inline]
 __se_compat_sys_sendfile fs/read_write.c:1505 [inline]
 __ia32_compat_sys_sendfile+0x190/0x2a0 fs/read_write.c:1505
 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

The buggy address belongs to the object at ffff8801b97d9440
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 220 bytes inside of
 256-byte region [ffff8801b97d9440, ffff8801b97d9540)
The buggy address belongs to the page:
page:ffffea0006e5f640 count:1 mapcount:0 mapping:ffff8801da8007c0 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006c1abc8 ffffea0006f063c8 ffff8801da8007c0
raw: 0000000000000000 ffff8801b97d9080 000000010000000c 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801b97d9400: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff8801b97d9480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801b97d9500: 00 00 00 04 fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff8801b97d9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801b97d9600: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
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