syzbot


invalid opcode in cgroup_mkdir

Status: auto-closed as invalid on 2019/10/25 14:11
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+3471d59f51e613697251@syzkaller.appspotmail.com
First crash: 1737d, last: 1737d

Sample crash report:
invalid opcode: 0000 [#1] SMP KASAN
CPU: 1 PID: 9701 Comm: syz-executor.0 Not tainted 5.2.0+ #64
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:cgroup_create /kernel/cgroup/cgroup.c:5307 [inline]
RIP: 0010:cgroup_mkdir+0xc86/0x1140 /kernel/cgroup/cgroup.c:5365
Code: 89 f9 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 01 0f 8e cd 03 00 00 66 41 89 86 18 02 00 00 e8 c0 36 06 00 4c 89 f7 4d 89 f7 <4d> dd f5 e8 a2 69 ff ff e9 ff fa ff ff e8 a8 36 06 00 4c 89 f7 e8
RSP: 0018:ffff88808a8dfd30 EFLAGS: 00010293
RAX: ffff8880a96cc540 RBX: ffffffff88dc9db0 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff816b1fc0 RDI: ffff88805d4a2500
RBP: ffff88808a8dfda8 R08: 1ffffffff14a6d40 R09: fffffbfff14a6d41
R10: fffffbfff14a6d40 R11: ffffffff8a536a07 R12: ffffffff88dc9e08
R13: ffff88805d4a2548 R14: ffff88805d4a2500 R15: ffff88805d4a2500
FS:  0000555556554940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdd1b62e80 CR3: 0000000093fe3000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kernfs_iop_mkdir+0x14d/0x1d0 /fs/kernfs/dir.c:1123
 vfs_mkdir+0x42e/0x670 /fs/namei.c:3815
 do_mkdirat+0x234/0x2a0 /fs/namei.c:3838
 __do_sys_mkdir /fs/namei.c:3854 [inline]
 __se_sys_mkdir /fs/namei.c:3852 [inline]
 __x64_sys_mkdir+0x5c/0x80 /fs/namei.c:3852
 do_syscall_64+0xfd/0x6a0 /arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458c37
Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd c3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ad c3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff2e73ae78 EFLAGS: 00000206 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000458c37
RDX: 00007fff2e73aed7 RSI: 00000000000001ff RDI: 00007fff2e73aec0
RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000017
R10: 0000000000000075 R11: 0000000000000206 R12: 000000000075ca28
R13: 00007fff2e73b2e8 R14: 0000000000000000 R15: 00007fff2e73aec0
Modules linked in:
---[ end trace 14370be14633a2c7 ]---
RIP: 0010:cgroup_create /kernel/cgroup/cgroup.c:5307 [inline]
RIP: 0010:cgroup_mkdir+0xc86/0x1140 /kernel/cgroup/cgroup.c:5365
Code: 89 f9 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 01 0f 8e cd 03 00 00 66 41 89 86 18 02 00 00 e8 c0 36 06 00 4c 89 f7 4d 89 f7 <4d> dd f5 e8 a2 69 ff ff e9 ff fa ff ff e8 a8 36 06 00 4c 89 f7 e8
RSP: 0018:ffff88808a8dfd30 EFLAGS: 00010293
RAX: ffff8880a96cc540 RBX: ffffffff88dc9db0 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff816b1fc0 RDI: ffff88805d4a2500
RBP: ffff88808a8dfda8 R08: 1ffffffff14a6d40 R09: fffffbfff14a6d41
R10: fffffbfff14a6d40 R11: ffffffff8a536a07 R12: ffffffff88dc9e08
R13: ffff88805d4a2548 R14: ffff88805d4a2500 R15: ffff88805d4a2500
FS:  0000555556554940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdd1b62e80 CR3: 0000000093fe3000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/07/22 17:04 upstream c6dd78fcb8ee b3c615f5 .config console log report ci-upstream-kasan-gce-selinux-root
* Struck through repros no longer work on HEAD.