On Tue, Nov 28, 2017 at 12:45:01PM -0800, syzbot wrote: > Hello, > > syzkaller hit the following crash on > 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > > Unfortunately, I don't have any reproducer for this bug yet. > > > QAT: Invalid ioctl > QAT: Invalid ioctl > QAT: Invalid ioctl > ================================================================== > BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:341 [inline] > BUG: KASAN: slab-out-of-bounds in sha3_update+0xdf/0x2e0 > crypto/sha3_generic.c:161 > Write of size 192 at addr ffff8801bf3f80fc by task syz-executor3/18788 > > CPU: 1 PID: 18788 Comm: syz-executor3 Not tainted 4.15.0-rc1+ #197 > Hardware name: Google Google Compute Engine/Google Compute Engine, > BIOS Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0x194/0x257 lib/dump_stack.c:53 > 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 > check_memory_region_inline mm/kasan/kasan.c:260 [inline] > check_memory_region+0x137/0x190 mm/kasan/kasan.c:267 > memcpy+0x37/0x50 mm/kasan/kasan.c:303 > memcpy include/linux/string.h:341 [inline] > sha3_update+0xdf/0x2e0 crypto/sha3_generic.c:161 > crypto_shash_update+0xcb/0x220 crypto/shash.c:109 > hmac_update+0x7e/0xa0 crypto/hmac.c:122 > crypto_shash_update+0xcb/0x220 crypto/shash.c:109 > kdf_ctr security/keys/dh.c:181 [inline] > keyctl_dh_compute_kdf security/keys/dh.c:226 [inline] > __keyctl_dh_compute+0x16d8/0x1a00 security/keys/dh.c:398 > keyctl_dh_compute+0xac/0xf3 security/keys/dh.c:434 > SYSC_keyctl security/keys/keyctl.c:1745 [inline] > SyS_keyctl+0x72/0x2c0 security/keys/keyctl.c:1641 > entry_SYSCALL_64_fastpath+0x1f/0x96 #syz dup: KASAN: stack-out-of-bounds Write in sha3_update
