#syz dup: KASAN: slab-out-of-bounds Read in handle_vmptrld On 08/11/19 20:14, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 847120f8 Merge branch 'for-linus' of > git://git.kernel.org/.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=12d60164e00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8c5e2eca3f31f9bf > dashboard link: > https://syzkaller.appspot.com/bug?extid=824609cfabee9c6e153c > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16e2a12ce00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13314994e00000 > > The bug was bisected to: > > commit 1ffe8bdc09f8bfcaad76d71ae68b623c7e03f20f > Author: Spencer E. Olson <olsonse@xxxxxxxxx> > Date: Mon Oct 10 14:14:19 2016 +0000 > > staging: comedi: ni_mio_common: split out ao arming from ni_ao_inttrig > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=122977fae00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=162977fae00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+824609cfabee9c6e153c@xxxxxxxxxxxxxxxxxxxxxxxxx > Fixes: 1ffe8bdc09f8 ("staging: comedi: ni_mio_common: split out ao > arming from ni_ao_inttrig") > > L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 > and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html > for details. > ------------[ cut here ]------------ > kernel BUG at arch/x86/kvm/mmu.c:3324! > invalid opcode: 0000 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 8688 Comm: syz-executor906 Not tainted 5.4.0-rc6+ #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:transparent_hugepage_adjust+0x490/0x530 arch/x86/kvm/mmu.c:3324 > Code: 63 00 48 8b 45 b8 48 83 e8 01 e9 19 fd ff ff e8 36 3c 63 00 48 8b > 45 b8 48 83 e8 01 48 89 45 c8 e9 a1 fd ff ff e8 20 3c 63 00 <0f> 0b 48 > 89 df e8 66 9e 9e 00 e9 9f fb ff ff 4c 89 ff e8 59 9e 9e > RSP: 0018:ffff88809753f690 EFLAGS: 00010293 > RAX: ffff88809549e6c0 RBX: ffff88809753f778 RCX: ffffffff810fe787 > RDX: 0000000000000000 RSI: ffffffff810fe8c0 RDI: 0000000000000007 > RBP: ffff88809753f6d8 R08: ffff88809549e6c0 R09: ffffed10131ed682 > R10: ffffed10131ed681 R11: ffff888098f6b40b R12: ffff88809753f768 > R13: 0000000000000083 R14: 000000000008fe81 R15: 0000000000000000 > FS: 000000000158e880(0000) GS:ffff8880ae800000(0000) > knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000000 CR3: 000000009f2a4000 CR4: 00000000001426f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > tdp_page_fault+0x56e/0x650 arch/x86/kvm/mmu.c:4216 > kvm_mmu_page_fault+0x1dd/0x1800 arch/x86/kvm/mmu.c:5439 > handle_ept_violation+0x259/0x560 arch/x86/kvm/vmx/vmx.c:5185 > vmx_handle_exit+0x29f/0x1730 arch/x86/kvm/vmx/vmx.c:5929 > vcpu_enter_guest arch/x86/kvm/x86.c:8227 [inline] > vcpu_run arch/x86/kvm/x86.c:8291 [inline] > kvm_arch_vcpu_ioctl_run+0x1cb8/0x70d0 arch/x86/kvm/x86.c:8498 > kvm_vcpu_ioctl+0x4dc/0xfc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2772 > vfs_ioctl fs/ioctl.c:46 [inline] > file_ioctl fs/ioctl.c:509 [inline] > do_vfs_ioctl+0xdb6/0x13e0 fs/ioctl.c:696 > ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 > __do_sys_ioctl fs/ioctl.c:720 [inline] > __se_sys_ioctl fs/ioctl.c:718 [inline] > __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 > do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x443f49 > Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 > f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 > f0 ff ff 0f 83 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007ffd991d67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443f49 > RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 > RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 > R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000401c50 > R13: 0000000000401ce0 R14: 0000000000000000 R15: 0000000000000000 > Modules linked in: > ---[ end trace 911095bae56804bc ]--- > RIP: 0010:transparent_hugepage_adjust+0x490/0x530 arch/x86/kvm/mmu.c:3324 > Code: 63 00 48 8b 45 b8 48 83 e8 01 e9 19 fd ff ff e8 36 3c 63 00 48 8b > 45 b8 48 83 e8 01 48 89 45 c8 e9 a1 fd ff ff e8 20 3c 63 00 <0f> 0b 48 > 89 df e8 66 9e 9e 00 e9 9f fb ff ff 4c 89 ff e8 59 9e 9e > RSP: 0018:ffff88809753f690 EFLAGS: 00010293 > RAX: ffff88809549e6c0 RBX: ffff88809753f778 RCX: ffffffff810fe787 > RDX: 0000000000000000 RSI: ffffffff810fe8c0 RDI: 0000000000000007 > RBP: ffff88809753f6d8 R08: ffff88809549e6c0 R09: ffffed10131ed682 > R10: ffffed10131ed681 R11: ffff888098f6b40b R12: ffff88809753f768 > R13: 0000000000000083 R14: 000000000008fe81 R15: 0000000000000000 > FS: 000000000158e880(0000) GS:ffff8880ae800000(0000) > knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000000 CR3: 000000009f2a4000 CR4: 00000000001426f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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 syzkaller@xxxxxxxxxxxxxxxx. > > 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 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
