Messages in this thread | | | Date | Sat, 26 May 2018 02:13:01 -0700 | Subject | KASAN: stack-out-of-bounds Write in notify_die | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: 203ec2fed17a Merge tag 'armsoc-fixes' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14feff97800000 kernel config: https://syzkaller.appspot.com/x/.config?x=f3b4e30da84ec1ed dashboard link: https://syzkaller.appspot.com/bug?extid=cadaa9a49085b3cc83d3 compiler: gcc (GCC) 8.0.1 20180413 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+cadaa9a49085b3cc83d3@syzkaller.appspotmail.com
================================================================== BUG: KASAN: stack-out-of-bounds in notify_die+0x291/0x2b0 kernel/notifier.c:539 Write of size 8 at addr ffff8801c74d7258 by task syz-executor7/17787
CPU: 1 PID: 17787 Comm: syz-executor7 Not tainted 4.17.0-rc5+ #60 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+0x1b9/0x294 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_store8_noabort+0x17/0x20 mm/kasan/report.c:438 notify_die+0x291/0x2b0 kernel/notifier.c:539 do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:558 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159 RIP: 0010:msr_write_intercepted arch/x86/kvm/vmx.c:2132 [inline] RIP: 0010:vmx_vcpu_run+0xa2f/0x25f0 arch/x86/kvm/vmx.c:9871 RSP: 0018:ffff8801c74d73b0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000010000000 RCX: ffffffff811f778f RDX: 000000000836b156 RSI: ffffffff811f779c RDI: 0000000000000005 RBP: ffff8801c74d7898 R08: ffff8801ab74e140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
The buggy address belongs to the page: page:ffffea00071d35c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff raw: 0000000000000000 ffffea00071d0101 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected
Memory state around the buggy address: ffff8801c74d7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801c74d7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff8801c74d7200: 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 f3 f3 ^ ffff8801c74d7280: f3 f3 00 f2 f2 f2 f2 f2 f2 f2 00 00 f2 f2 f3 f3 ffff8801c74d7300: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================
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