syzbot


PANIC: double fault in fixup_bad_iret

Status: fixed on 2020/08/01 00:49
Reported-by: syzbot+dc1fa714cb070b184db5@syzkaller.appspotmail.com
Fix commit: 5144f8a8dfd7 compiler_types.h: Add __no_sanitize_{address,undefined} to noinstr
First crash: 979d, last: 934d

Cause bisection: failed (bisect log)

Sample crash report:
traps: PANIC: double fault, error_code: 0x0
double fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6826 Comm: syz-executor108 Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fixup_bad_iret+0x24/0x170 arch/x86/kernel/traps.c:681
Code: eb cb 0f 1f 40 00 41 55 49 bd 00 00 00 00 00 fc ff df 41 54 55 48 89 fd 48 c7 c7 e0 83 45 88 53 48 81 ec 40 01 00 00 48 89 e3 <48> c7 04 24 b3 8a b5 41 48 c7 44 24 08 4f 96 66 89 48 c1 eb 03 48
RSP: 0018:fffffe0000036fb8 EFLAGS: 00010086
RAX: 0000000000000000 RBX: fffffe0000036fb8 RCX: ffffffff88000e87
RDX: 0000000000000000 RSI: ffffffff880009a8 RDI: ffffffff884583e0
RBP: fffffe0000037120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000e47880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffe0000036fa8 CR3: 000000009f9e1000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <ENTRY_TRAMPOLINE>
 error_entry+0xb8/0xc0 arch/x86/entry/entry_64.S:946
RIP: 0010:native_irq_return_iret+0x0/0x2
Code: 5a 41 59 41 58 58 59 5a 5e 5f 48 83 c4 08 e9 10 00 00 00 90 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 f6 44 24 20 04 75 02 <48> cf 57 0f 01 f8 0f 1f 00 65 48 8b 3c 25 00 90 01 00 48 89 07 48
RSP: 0018:fffffe00000371d8 EFLAGS: 00010046 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
RIP: 0033:0x273c050000075366
Code: Bad RIP value.
RSP: 002b:00007ffec432c4a8 EFLAGS: 00000346 </ENTRY_TRAMPOLINE>
Modules linked in:
---[ end trace 0cc912d7bbc782ab ]---
RIP: 0010:fixup_bad_iret+0x24/0x170 arch/x86/kernel/traps.c:681
Code: eb cb 0f 1f 40 00 41 55 49 bd 00 00 00 00 00 fc ff df 41 54 55 48 89 fd 48 c7 c7 e0 83 45 88 53 48 81 ec 40 01 00 00 48 89 e3 <48> c7 04 24 b3 8a b5 41 48 c7 44 24 08 4f 96 66 89 48 c1 eb 03 48
RSP: 0018:fffffe0000036fb8 EFLAGS: 00010086
RAX: 0000000000000000 RBX: fffffe0000036fb8 RCX: ffffffff88000e87
RDX: 0000000000000000 RSI: ffffffff880009a8 RDI: ffffffff884583e0
RBP: fffffe0000037120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000e47880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffe0000036fa8 CR3: 000000009f9e1000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (11753):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kasan-gce-selinux-root 2020/06/26 09:59 upstream 4a21185cda0f aea82c00 .config console log report syz C
ci-upstream-kasan-gce 2020/06/26 09:38 upstream 4a21185cda0f aea82c00 .config console log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/05/25 18:22 linux-next 7b4cb0a48db0 30927cd7 .config console log report syz C
ci-upstream-kasan-gce-root 2020/06/26 10:22 upstream 4a21185cda0f aea82c00 .config console log report syz
ci-qemu-upstream 2020/07/08 23:42 upstream 719fdd32921f 9f9845eb .config console log report
ci-qemu-upstream 2020/07/08 10:56 upstream 719fdd32921f 5962a2dc .config console log report
ci-qemu-upstream 2020/07/08 03:44 upstream 719fdd32921f 08fc4ef1 .config console log report
ci-qemu-upstream 2020/07/08 02:07 upstream 719fdd32921f 08fc4ef1 .config console log report
ci-qemu-upstream 2020/07/08 00:38 upstream 719fdd32921f 08fc4ef1 .config console log report
ci-qemu-upstream 2020/07/07 23:30 upstream 719fdd32921f 08fc4ef1 .config console log report
ci-qemu-upstream 2020/07/07 14:47 upstream 719fdd32921f 3f3be050 .config console log report
ci-qemu-upstream 2020/07/07 12:03 upstream 719fdd32921f 3f3be050 .config console log report
ci-qemu-upstream 2020/07/05 07:32 upstream 719fdd32921f bed10395 .config console log report
ci-qemu-upstream 2020/07/05 06:17 upstream 719fdd32921f bed10395 .config console log report
ci-qemu-upstream 2020/07/04 19:23 upstream 719fdd32921f bed10395 .config console log report
ci-qemu-upstream 2020/07/04 01:50 upstream 719fdd32921f bed10395 .config console log report
ci-qemu-upstream 2020/07/03 15:07 upstream 719fdd32921f bed10395 .config console log report
ci-qemu-upstream 2020/07/03 06:01 upstream 719fdd32921f bed10395 .config console log report
ci-qemu-upstream 2020/07/01 23:11 upstream 719fdd32921f bed10395 .config console log report
ci-qemu-upstream 2020/07/01 13:38 upstream 719fdd32921f 33576216 .config console log report
ci-qemu-upstream 2020/07/01 12:22 upstream 719fdd32921f 33576216 .config console log report
ci-qemu-upstream 2020/07/01 10:24 upstream 719fdd32921f 33576216 .config console log report
ci-upstream-kasan-gce 2020/06/30 18:04 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 17:47 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 17:34 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 17:20 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce 2020/06/30 17:03 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce 2020/06/30 16:46 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce 2020/06/30 16:28 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 16:02 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 15:45 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 15:18 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 15:00 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 14:38 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce 2020/06/30 14:05 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 13:41 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 13:26 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce 2020/06/30 13:03 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 12:31 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 12:19 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 12:01 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 11:43 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 11:33 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 11:07 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 10:56 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 10:50 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 10:44 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 10:36 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce 2020/06/30 10:31 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-root 2020/06/30 10:23 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-kasan-gce-selinux-root 2020/06/30 10:17 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-qemu-upstream-386 2020/07/09 02:34 upstream 719fdd32921f 9f9845eb .config console log report
ci-qemu-upstream-386 2020/07/05 14:28 upstream 719fdd32921f bed10395 .config console log report
ci-upstream-kasan-gce-386 2020/06/30 11:18 upstream 4e99b32169e8 a2cdad9d .config console log report
ci-upstream-linux-next-kasan-gce-root 2020/06/27 00:56 linux-next e7b08814b16b aea82c00 .config console log report
ci-upstream-linux-next-kasan-gce-root 2020/05/25 13:12 linux-next 7b4cb0a48db0 11284182 .config console log report
* Struck through repros no longer work on HEAD.