Hello, syzbot found the following issue on: HEAD commit: 4fa56ad0 Merge tag 'for-linus' of git://git.kernel.org/pub.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17dbd09ad00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9320464bf47598bd dashboard link: https://syzkaller.appspot.com/bug?extid=4061a98a8ab454dde8ff Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4061a98a8ab454dde8ff@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: use-after-free in memcpy include/linux/fortify-string.h:191 [inline] BUG: KASAN: use-after-free in skcipher_next_copy crypto/skcipher.c:292 [inline] BUG: KASAN: use-after-free in skcipher_walk_next+0xb69/0x1680 crypto/skcipher.c:379 Read of size 2785 at addr ffff8880781c0000 by task kworker/u4:3/204 CPU: 0 PID: 204 Comm: kworker/u4:3 Not tainted 5.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: pencrypt_parallel padata_parallel_worker Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232 __kasan_report mm/kasan/report.c:399 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416 check_region_inline mm/kasan/generic.c:180 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:186 memcpy+0x20/0x60 mm/kasan/shadow.c:65 memcpy include/linux/fortify-string.h:191 [inline] skcipher_next_copy crypto/skcipher.c:292 [inline] skcipher_walk_next+0xb69/0x1680 crypto/skcipher.c:379 skcipher_walk_done+0x7a3/0xf00 crypto/skcipher.c:159 gcmaes_crypt_by_sg+0x377/0x8a0 arch/x86/crypto/aesni-intel_glue.c:694 The buggy address belongs to the page: page:ffffea0001e07000 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x1 pfn:0x781c0 flags: 0xfff00000000000() raw: 00fff00000000000 ffffea0001e06808 ffffea0001c67008 0000000000000000 raw: 0000000000000001 0000000000000004 00000000ffffff7f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880781bff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880781bff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880781c0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8880781c0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880781c0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
