syzbot


WARNING in kthread_bind_mask

Status: upstream: reported syz repro on 2023/06/17 03:28
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+66cf6e29eb3ba11a0f22@syzkaller.appspotmail.com
First crash: 258d, last: 258d
Bug presence (2)
Date Name Commit Repro Result
2023/06/17 linux-6.1.y (ToT) ca87e77a2ef8 C [report] INFO: rcu detected stall in corrupted
2023/06/17 upstream (ToT) 1639fae5132b C Didn't crash
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in kthread_bind_mask kernel 58 245d 740d 0/26 auto-obsoleted due to no activity on 2023/10/08 16:22
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/10/03 04:57 6h00m fix candidate upstream job log (1)

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3865 at kernel/kthread.c:524 kthread_bind_mask+0x90/0xc0 kernel/kthread.c:542
Modules linked in:
CPU: 1 PID: 3865 Comm: syz-executor.3 Not tainted 6.1.34-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:__kthread_bind_mask kernel/kthread.c:524 [inline]
RIP: 0010:kthread_bind_mask+0x90/0xc0 kernel/kthread.c:542
Code: 00 fc ff df 0f b6 04 08 84 c0 75 2a 41 80 4d 03 04 4c 89 f7 4c 89 e6 5b 41 5c 41 5d 41 5e 41 5f e9 35 b1 31 09 e8 30 65 2e 00 <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f c3 44 89 e9 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90004d9fb58 EFLAGS: 00010293
RAX: ffffffff815b7020 RBX: 0000000000000000 RCX: ffff888021d5bb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff110045b0828 R08: ffffffff815b6fbe R09: ffffed100462b141
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888022d84140
R13: ffff888023158000 R14: ffff888063a718f8 R15: ffffffff8e5326b8
FS:  0000555557482400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200018c5 CR3: 000000006477b000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 init_rescuer+0x225/0x290 kernel/workqueue.c:4282
 alloc_workqueue+0xf3d/0x1440 kernel/workqueue.c:4349
 kvm_mmu_init_tdp_mmu+0x79/0x1e0 arch/x86/kvm/mmu/tdp_mmu.c:24
 kvm_mmu_init_vm+0x10e/0x2a0 arch/x86/kvm/mmu/mmu.c:6002
 kvm_arch_init_vm+0x52/0x620 arch/x86/kvm/x86.c:12432
 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1201 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4967 [inline]
 kvm_dev_ioctl+0xb24/0x1860 arch/x86/kvm/../../../virt/kvm/kvm_main.c:5009
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f689e88c389
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007ffd6e2fc318 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f689e9abf80 RCX: 00007f689e88c389
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003
RBP: 00007f689e8d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f689e400448 R14: 00007f689e9abf80 R15: 0000000000000000
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/17 03:26 linux-6.1.y ca87e77a2ef8 f3921d4d .config console log report syz [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in kthread_bind_mask
* Struck through repros no longer work on HEAD.