Hello, syzbot found the following crash on:
HEAD commit: e99332e7 gcc-10: mark more functions __init to avoid secti.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16e4a10c100000 kernel config: https://syzkaller.appspot.com/x/.config?x=8a96cf498e199d8b dashboard link: https://syzkaller.appspot.com/bug?extid=45862e7027be5d590577 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17bb1714100000 Bisection is inconclusive: the bug happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12e02714100000 final crash: https://syzkaller.appspot.com/x/report.txt?x=11e02714100000 console output: https://syzkaller.appspot.com/x/log.txt?x=16e02714100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: [email protected] ================================================================== BUG: KASAN: out-of-bounds in pebs_update_adaptive_cfg arch/x86/events/intel/ds.c:991 [inline] BUG: KASAN: out-of-bounds in pebs_update_state+0xc27/0xc80 arch/x86/events/intel/ds.c:1046 Read of size 8 at addr ffffc90004857428 by task syz-executor.1/8320 CPU: 0 PID: 8320 Comm: syz-executor.1 Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x315 mm/kasan/report.c:382 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511 kasan_report+0x33/0x50 mm/kasan/common.c:625 pebs_update_adaptive_cfg arch/x86/events/intel/ds.c:991 [inline] pebs_update_state+0xc27/0xc80 arch/x86/events/intel/ds.c:1046 </IRQ> Memory state around the buggy address: ffffc90004857300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004857380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004857400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffc90004857480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004857500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- This bug 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 [email protected]. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
