* [syzbot] general protection fault in rcu_segcblist_enqueue
@ 2021-07-04 11:37 syzbot
2021-08-14 8:05 ` syzbot
2021-10-06 22:49 ` syzbot
0 siblings, 2 replies; 4+ messages in thread
From: syzbot @ 2021-07-04 11:37 UTC (permalink / raw)
To: axboe, bp, hpa, jack, jmattson, joro, kvm, linux-kernel, mingo,
paolo.valente, pbonzini, seanjc, syzkaller-bugs, tglx, vkuznets,
wanpengli, x86
Hello,
syzbot found the following issue on:
HEAD commit: df04fbe8 Merge branch 'for-linus' of git://git.kernel.org/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13eb6594300000
kernel config: https://syzkaller.appspot.com/x/.config?x=9a9c38351af1345a
dashboard link: https://syzkaller.appspot.com/bug?extid=7590ddacf9f333c18f6c
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1326068c300000
The issue was bisected to:
commit 71217df39dc67a0aeed83352b0d712b7892036a2
Author: Paolo Valente <paolo.valente@linaro.org>
Date: Mon Jan 25 19:02:48 2021 +0000
block, bfq: make waker-queue detection more robust
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=127c2700300000
final oops: https://syzkaller.appspot.com/x/report.txt?x=117c2700300000
console output: https://syzkaller.appspot.com/x/log.txt?x=167c2700300000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7590ddacf9f333c18f6c@syzkaller.appspotmail.com
Fixes: 71217df39dc6 ("block, bfq: make waker-queue detection more robust")
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: 11479 Comm: syz-executor.0 Tainted: G W 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_segcblist_enqueue+0xb9/0x130 kernel/rcu/rcu_segcblist.c:348
Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4e 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 21 48 89 75 00 48 89 73 20 48 83 c4 08 5b 5d c3 48
RSP: 0018:ffffc90003287be8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8880b9c00080 RCX: ffffffff815c5540
RDX: 0000000000000000 RSI: ffffc90003287cd0 RDI: ffff8880b9c000a0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000650f6f R11: 0000000000000000 R12: ffffc90003287cd0
R13: ffff8880b9c00080 R14: 0000000000000000 R15: ffff8880b9c00040
FS: 00007fbfbe427700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000544038 CR3: 000000003a8e9000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
srcu_gp_start_if_needed+0x116/0xbc0 kernel/rcu/srcutree.c:828
__call_srcu kernel/rcu/srcutree.c:888 [inline]
__synchronize_srcu+0x1d1/0x280 kernel/rcu/srcutree.c:934
kvm_mmu_uninit_vm+0x18/0x30 arch/x86/kvm/mmu/mmu.c:5555
kvm_arch_destroy_vm+0x4fc/0x690 arch/x86/kvm/x86.c:11265
kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1046 [inline]
kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4443 [inline]
kvm_dev_ioctl+0x120e/0x1740 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4498
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:1069 [inline]
__se_sys_ioctl fs/ioctl.c:1055 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbfbe427188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffc6c46097f R14: 00007fbfbe427300 R15: 0000000000022000
Modules linked in:
---[ end trace e798d58b3973533f ]---
RIP: 0010:rcu_segcblist_enqueue+0xb9/0x130 kernel/rcu/rcu_segcblist.c:348
Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4e 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 21 48 89 75 00 48 89 73 20 48 83 c4 08 5b 5d c3 48
RSP: 0018:ffffc90003287be8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: ffff8880b9c00080 RCX: ffffffff815c5540
RDX: 0000000000000000 RSI: ffffc90003287cd0 RDI: ffff8880b9c000a0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000650f6f R11: 0000000000000000 R12: ffffc90003287cd0
R13: ffff8880b9c00080 R14: 0000000000000000 R15: ffff8880b9c00040
FS: 00007fbfbe427700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000544038 CR3: 000000003a8e9000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
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@googlegroups.com.
syzbot will keep track of this issue. 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 issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [syzbot] general protection fault in rcu_segcblist_enqueue 2021-07-04 11:37 [syzbot] general protection fault in rcu_segcblist_enqueue syzbot @ 2021-08-14 8:05 ` syzbot 2021-10-06 22:49 ` syzbot 1 sibling, 0 replies; 4+ messages in thread From: syzbot @ 2021-08-14 8:05 UTC (permalink / raw) To: axboe, bp, hpa, jack, jmattson, joro, kvm, linux-kernel, mingo, paolo.valente, pbonzini, seanjc, syzkaller-bugs, tglx, vkuznets, wanpengli, x86 syzbot has found a reproducer for the following issue on: HEAD commit: 4b358aabb93a Add linux-next specific files for 20210813 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13fb40f9300000 kernel config: https://syzkaller.appspot.com/x/.config?x=b99612666fbe2d6a dashboard link: https://syzkaller.appspot.com/bug?extid=7590ddacf9f333c18f6c compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12b34781300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10249f79300000 The issue was bisected to: commit 71217df39dc67a0aeed83352b0d712b7892036a2 Author: Paolo Valente <paolo.valente@linaro.org> Date: Mon Jan 25 19:02:48 2021 +0000 block, bfq: make waker-queue detection more robust bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=127c2700300000 final oops: https://syzkaller.appspot.com/x/report.txt?x=117c2700300000 console output: https://syzkaller.appspot.com/x/log.txt?x=167c2700300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7590ddacf9f333c18f6c@syzkaller.appspotmail.com Fixes: 71217df39dc6 ("block, bfq: make waker-queue detection more robust") 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: 8358 Comm: syz-executor858 Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_segcblist_enqueue+0xb9/0x130 kernel/rcu/rcu_segcblist.c:348 Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4e 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 21 48 89 75 00 48 89 73 20 48 83 c4 08 5b 5d c3 48 RSP: 0018:ffffc90002d1fbe0 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff8880b9c00080 RCX: ffffffff815b8cb0 RDX: 0000000000000000 RSI: ffffc90002d1fcc8 RDI: ffff8880b9c000a0 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 R10: fffff520005a3f6e R11: 0000000000000000 R12: ffffc90002d1fcc8 R13: ffff8880b9c00080 R14: 0000000000000000 R15: ffff8880b9c00040 FS: 00007f6a0b6c7700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d2700 CR3: 0000000073719000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: srcu_gp_start_if_needed+0x116/0xbc0 kernel/rcu/srcutree.c:823 __call_srcu kernel/rcu/srcutree.c:883 [inline] __synchronize_srcu+0x21f/0x290 kernel/rcu/srcutree.c:929 kvm_mmu_uninit_vm+0x18/0x30 arch/x86/kvm/mmu/mmu.c:5625 kvm_arch_destroy_vm+0x4e7/0x680 arch/x86/kvm/x86.c:11317 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1075 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4548 [inline] kvm_dev_ioctl+0xfe6/0x1a40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4603 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x446a69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6a0b6c7278 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004cb4d0 RCX: 0000000000446a69 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 00000000004cb4dc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049b2a8 R13: 00007f6a0b6c7280 R14: 6d766b2f7665642f R15: 00000000004cb4d8 Modules linked in: ---[ end trace 87a789ef23d34c4d ]--- RIP: 0010:rcu_segcblist_enqueue+0xb9/0x130 kernel/rcu/rcu_segcblist.c:348 Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4e 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 21 48 89 75 00 48 89 73 20 48 83 c4 08 5b 5d c3 48 RSP: 0018:ffffc90002d1fbe0 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff8880b9c00080 RCX: ffffffff815b8cb0 RDX: 0000000000000000 RSI: ffffc90002d1fcc8 RDI: ffff8880b9c000a0 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 R10: fffff520005a3f6e R11: 0000000000000000 R12: ffffc90002d1fcc8 R13: ffff8880b9c00080 R14: 0000000000000000 R15: ffff8880b9c00040 FS: 00007f6a0b6c7700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d2700 CR3: 0000000073719000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 75 4e jne 0x5c e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 15: fc ff df 18: 48 8b 6b 20 mov 0x20(%rbx),%rbp 1c: 48 89 ea mov %rbp,%rdx 1f: 48 c1 ea 03 shr $0x3,%rdx 23: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 27: 75 21 jne 0x4a 29: 48 89 75 00 mov %rsi,0x0(%rbp) 2d: 48 89 73 20 mov %rsi,0x20(%rbx) 31: 48 83 c4 08 add $0x8,%rsp 35: 5b pop %rbx 36: 5d pop %rbp 37: c3 retq 38: 48 rex.W ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] general protection fault in rcu_segcblist_enqueue 2021-07-04 11:37 [syzbot] general protection fault in rcu_segcblist_enqueue syzbot 2021-08-14 8:05 ` syzbot @ 2021-10-06 22:49 ` syzbot 2021-10-06 22:52 ` Sean Christopherson 1 sibling, 1 reply; 4+ messages in thread From: syzbot @ 2021-10-06 22:49 UTC (permalink / raw) To: axboe, bp, hpa, jack, jmattson, joro, kvm, linux-kernel, mingo, paolo.valente, pbonzini, reijiw, seanjc, syzkaller-bugs, tglx, vkuznets, wanpengli, x86 syzbot suspects this issue was fixed by commit: commit 067a456d091d05fdae32cae350410d905968b645 Author: Sean Christopherson <seanjc@google.com> Date: Tue Jul 13 16:32:43 2021 +0000 KVM: SVM: Require exact CPUID.0x1 match when stuffing EDX at INIT bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15d871b7300000 start commit: 0319b848b155 binfmt: a.out: Fix bogus semicolon git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=faed7df0f442c217 dashboard link: https://syzkaller.appspot.com/bug?extid=7590ddacf9f333c18f6c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1308d0ed300000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: KVM: SVM: Require exact CPUID.0x1 match when stuffing EDX at INIT For information about bisection process see: https://goo.gl/tpsmEJ#bisection ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] general protection fault in rcu_segcblist_enqueue 2021-10-06 22:49 ` syzbot @ 2021-10-06 22:52 ` Sean Christopherson 0 siblings, 0 replies; 4+ messages in thread From: Sean Christopherson @ 2021-10-06 22:52 UTC (permalink / raw) To: syzbot Cc: axboe, bp, hpa, jack, jmattson, joro, kvm, linux-kernel, mingo, paolo.valente, pbonzini, reijiw, syzkaller-bugs, tglx, vkuznets, wanpengli, x86 On Wed, Oct 06, 2021, syzbot wrote: > syzbot suspects this issue was fixed by commit: > > commit 067a456d091d05fdae32cae350410d905968b645 > Author: Sean Christopherson <seanjc@google.com> > Date: Tue Jul 13 16:32:43 2021 +0000 > > KVM: SVM: Require exact CPUID.0x1 match when stuffing EDX at INIT > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15d871b7300000 > start commit: 0319b848b155 binfmt: a.out: Fix bogus semicolon > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=faed7df0f442c217 > dashboard link: https://syzkaller.appspot.com/bug?extid=7590ddacf9f333c18f6c > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1308d0ed300000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: KVM: SVM: Require exact CPUID.0x1 match when stuffing EDX at INIT LOL, close? At least syzbot found a KVM commit. #syz fix: KVM: x86: Handle SRCU initialization failure during page track init ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-10-06 22:52 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-07-04 11:37 [syzbot] general protection fault in rcu_segcblist_enqueue syzbot 2021-08-14 8:05 ` syzbot 2021-10-06 22:49 ` syzbot 2021-10-06 22:52 ` Sean Christopherson
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