general protection fault in __handle_changed_spte
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syzbot
Dec 6, 2021, 1:25:33 PM12/6/21
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 58e1100fdc59 MAINTAINERS: co-maintain random.c
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12319255b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=5b0eee8ab3ea1839
dashboard link: https://syzkaller.appspot.com/bug?extid=f71021d7f6fd3f650571
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: i386
CC: [b...@alien8.de dave....@linux.intel.com h...@zytor.com jmat...@google.com jo...@8bytes.org k...@vger.kernel.org linux-...@vger.kernel.org mi...@redhat.com pbon...@redhat.com sea...@google.com tg...@linutronix.de vkuz...@redhat.com wanp...@tencent.com x...@kernel.org]
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+f71021...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 11286 Comm: syz-executor.2 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51
Code: 0f 84 1f 16 31 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 20 16 31 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 d7 15 31 05 49 8d 7d
RSP: 0018:ffffc9000d93f318 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900247a1000
RDX: 0000000000000000 RSI: ffffffff811d299b RDI: ffff888024cb35d8
RBP: ffff888024cb35d0 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52001b27e59 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888024cb35d0 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f4436b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002be27000 CR3: 0000000077988000 CR4: 0000000000152ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__list_del_entry include/linux/list.h:134 [inline]
list_del include/linux/list.h:148 [inline]
tdp_mmu_unlink_page arch/x86/kvm/mmu/tdp_mmu.c:289 [inline]
handle_removed_tdp_mmu_page arch/x86/kvm/mmu/tdp_mmu.c:324 [inline]
__handle_changed_spte+0x8dc/0x13e0 arch/x86/kvm/mmu/tdp_mmu.c:475
tdp_mmu_set_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:522 [inline]
tdp_mmu_set_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:501 [inline]
tdp_mmu_zap_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:538 [inline]
zap_gfn_range+0x5c8/0xee0 arch/x86/kvm/mmu/tdp_mmu.c:750
kvm_tdp_mmu_zap_invalidated_roots+0x110/0x410 arch/x86/kvm/mmu/tdp_mmu.c:841
kvm_mmu_zap_all_fast+0x5b8/0x760 arch/x86/kvm/mmu/mmu.c:5669
kvm_page_track_flush_slot+0xfb/0x1a0 arch/x86/kvm/mmu/page_track.c:299
kvm_set_memslot+0x665/0x1e50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1585
__kvm_set_memory_region+0xd1e/0x13a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1779
kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1800 [inline]
kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1812 [inline]
kvm_vm_ioctl+0x512/0x23d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4311
kvm_vm_compat_ioctl+0x288/0x350 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4536
__do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:972
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6e7e549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f44365fc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000004020ae46
RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 2b51c81de60d8d0f ]---
RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51
Code: 0f 84 1f 16 31 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 20 16 31 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 d7 15 31 05 49 8d 7d
RSP: 0018:ffffc9000d93f318 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900247a1000
RDX: 0000000000000000 RSI: ffffffff811d299b RDI: ffff888024cb35d8
RBP: ffff888024cb35d0 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52001b27e59 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888024cb35d0 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f4436b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002be27000 CR3: 0000000077988000 CR4: 0000000000152ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 0f 84 1f 16 31 05 je 0x5311625
6: 48 b8 22 01 00 00 00 movabs $0xdead000000000122,%rax
d: 00 ad de
10: 49 39 c4 cmp %rax,%r12
13: 0f 84 20 16 31 05 je 0x5311639
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 4c 89 e2 mov %r12,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 75 51 jne 0x81
30: 49 8b 14 24 mov (%r12),%rdx
34: 48 39 ea cmp %rbp,%rdx
37: 0f 85 d7 15 31 05 jne 0x5311614
3d: 49 rex.WB
3e: 8d .byte 0x8d
3f: 7d .byte 0x7d
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 58e1100fdc59 MAINTAINERS: co-maintain random.c
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12319255b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=5b0eee8ab3ea1839
dashboard link: https://syzkaller.appspot.com/bug?extid=f71021d7f6fd3f650571
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: i386
CC: [b...@alien8.de dave....@linux.intel.com h...@zytor.com jmat...@google.com jo...@8bytes.org k...@vger.kernel.org linux-...@vger.kernel.org mi...@redhat.com pbon...@redhat.com sea...@google.com tg...@linutronix.de vkuz...@redhat.com wanp...@tencent.com x...@kernel.org]
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+f71021...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 11286 Comm: syz-executor.2 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51
Code: 0f 84 1f 16 31 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 20 16 31 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 d7 15 31 05 49 8d 7d
RSP: 0018:ffffc9000d93f318 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900247a1000
RDX: 0000000000000000 RSI: ffffffff811d299b RDI: ffff888024cb35d8
RBP: ffff888024cb35d0 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52001b27e59 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888024cb35d0 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f4436b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002be27000 CR3: 0000000077988000 CR4: 0000000000152ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__list_del_entry include/linux/list.h:134 [inline]
list_del include/linux/list.h:148 [inline]
tdp_mmu_unlink_page arch/x86/kvm/mmu/tdp_mmu.c:289 [inline]
handle_removed_tdp_mmu_page arch/x86/kvm/mmu/tdp_mmu.c:324 [inline]
__handle_changed_spte+0x8dc/0x13e0 arch/x86/kvm/mmu/tdp_mmu.c:475
tdp_mmu_set_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:522 [inline]
tdp_mmu_set_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:501 [inline]
tdp_mmu_zap_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:538 [inline]
zap_gfn_range+0x5c8/0xee0 arch/x86/kvm/mmu/tdp_mmu.c:750
kvm_tdp_mmu_zap_invalidated_roots+0x110/0x410 arch/x86/kvm/mmu/tdp_mmu.c:841
kvm_mmu_zap_all_fast+0x5b8/0x760 arch/x86/kvm/mmu/mmu.c:5669
kvm_page_track_flush_slot+0xfb/0x1a0 arch/x86/kvm/mmu/page_track.c:299
kvm_set_memslot+0x665/0x1e50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1585
__kvm_set_memory_region+0xd1e/0x13a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1779
kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1800 [inline]
kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1812 [inline]
kvm_vm_ioctl+0x512/0x23d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4311
kvm_vm_compat_ioctl+0x288/0x350 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4536
__do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:972
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6e7e549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f44365fc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000004020ae46
RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 2b51c81de60d8d0f ]---
RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51
Code: 0f 84 1f 16 31 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 20 16 31 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 d7 15 31 05 49 8d 7d
RSP: 0018:ffffc9000d93f318 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900247a1000
RDX: 0000000000000000 RSI: ffffffff811d299b RDI: ffff888024cb35d8
RBP: ffff888024cb35d0 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52001b27e59 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888024cb35d0 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f4436b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002be27000 CR3: 0000000077988000 CR4: 0000000000152ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 0f 84 1f 16 31 05 je 0x5311625
6: 48 b8 22 01 00 00 00 movabs $0xdead000000000122,%rax
d: 00 ad de
10: 49 39 c4 cmp %rax,%r12
13: 0f 84 20 16 31 05 je 0x5311639
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 4c 89 e2 mov %r12,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 75 51 jne 0x81
30: 49 8b 14 24 mov (%r12),%rdx
34: 48 39 ea cmp %rbp,%rdx
37: 0f 85 d7 15 31 05 jne 0x5311614
3d: 49 rex.WB
3e: 8d .byte 0x8d
3f: 7d .byte 0x7d
---
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 syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Mar 2, 2022, 1:16:15 PM3/2/22
to syzkaller-upst...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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