syzbot


WARNING in kvm_put_kvm

Status: premoderation: reported C repro on 2025/07/11 19:39
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+311086925794b1f32ac6@syzkaller.appspotmail.com
First crash: 44d, last: now
Bug presence (3)
Date Name Commit Repro Result
2025/07/12 android16-6.12 (ToT) 21ed84930c16 C [report] WARNING in kvm_put_kvm
2025/07/11 lts (merge base) e0e2f7824338 C Didn't crash
2025/07/11 upstream (ToT) 40f92e79b0aa C Didn't crash
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in kvm_put_kvm (2) bcachefs -1 18 224d 305d 0/29 auto-obsoleted due to no activity on 2025/03/14 05:33
upstream WARNING in kvm_put_kvm kvm -1 14 424d 433d 0/29 closed as invalid on 2024/08/16 18:20

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 389 at kernel/rcu/srcutree.c:664 cleanup_srcu_struct+0x3e9/0x4c0 kernel/rcu/srcutree.c:687
Modules linked in:
CPU: 0 UID: 0 PID: 389 Comm: syz.2.25 Not tainted syzkaller #0 9c3949e8c50b042e925ab8ad62694a1daa4311a1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:cleanup_srcu_struct+0x3e9/0x4c0 kernel/rcu/srcutree.c:664
Code: 00 48 8b 5d a0 74 08 48 89 df e8 12 43 6e 00 48 c7 03 00 00 00 00 48 83 c4 40 5b 41 5c 41 5d 41 5e 41 5f 5d e9 48 46 20 04 cc <0f> 0b eb e8 0f 0b eb e4 0f 0b eb e0 0f 0b eb 0e 0f 0b 4c 8b 75 d0
RSP: 0018:ffffc9000080fc88 EFLAGS: 00010202
RAX: 1ffffd1ffff8129a RBX: ffffc9000104b8e8 RCX: ffffffff816dc379
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffe8ffffc094d0
RBP: ffffc9000080fcf0 R08: ffffe8ffffc094d7 R09: 1ffffd1ffff8129a
R10: dffffc0000000000 R11: fffff91ffff8129b R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffe8ffffc094d0
FS:  000055558041f500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe2c27b298 CR3: 000000011676c000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 kvm_destroy_vm virt/kvm/kvm_main.c:1362 [inline]
 kvm_put_kvm+0x1100/0x12b0 virt/kvm/kvm_main.c:1391
 kvm_vm_release+0x47/0x70 virt/kvm/kvm_main.c:1414
 __fput+0x1fe/0xa00 fs/file_table.c:429
 ____fput+0x20/0x30 fs/file_table.c:457
 task_work_run+0x1e3/0x250 kernel/task_work.c:240
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f41d018ebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe2c27b178 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000008d3c RCX: 00007f41d018ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000001 R09: 000000032c27b46f
R10: 0000001b33120000 R11: 0000000000000246 R12: 00007f41d03b5fac
R13: 00007f41d03b5fa0 R14: ffffffffffffffff R15: 0000000000000002
 </TASK>
---[ end trace 0000000000000000 ]---

Crashes (27692):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/19 19:58 android16-6.12 9fbae8cca426 254a27c1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/19 19:40 android16-6.12 9fbae8cca426 254a27c1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/18 04:30 android16-6.12 3f3a5c5e782d 1804e95e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/17 08:54 android16-6.12 3f3a5c5e782d 1804e95e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/16 19:46 android16-6.12 3f3a5c5e782d 1804e95e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/08 12:21 android16-6.12 209015b548fb 6a893178 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/07 19:56 android16-6.12 e5a17398e40d 04cffc22 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/07 08:11 android16-6.12 886d2f37b799 9a42d6b1 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/04 18:40 android16-6.12 1ccd114e35d8 f5bcc8dc .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/02 07:37 android16-6.12 bf0fb8bb181b 7368264b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/31 01:45 android16-6.12 cab1c944469e f8f2b4da .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/27 04:14 android16-6.12 e9bbc29c066a fb8f743d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/26 11:59 android16-6.12 21fbbe6cf817 fb8f743d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/16 16:33 android16-6.12 a5cb8a78429e 124ec9cc .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/14 06:06 android16-6.12 21ed84930c16 3cda49cf .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/14 01:12 android16-6.12 21ed84930c16 3cda49cf .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/13 14:27 android16-6.12 21ed84930c16 3cda49cf .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/12 01:20 android16-6.12 a76eb2b67bde 3cda49cf .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/11 20:36 android16-6.12 a76eb2b67bde 3cda49cf .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/07/11 20:06 android16-6.12 a76eb2b67bde 3cda49cf .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 06:59 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 06:40 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 06:16 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 05:47 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 05:23 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 05:03 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 04:44 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 04:27 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 04:10 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 03:54 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 03:32 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 03:05 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 02:42 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 02:23 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 02:06 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 01:33 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 01:12 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 00:51 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 00:37 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/25 00:18 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 23:59 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 23:42 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 23:10 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 22:40 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 22:17 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 21:56 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 21:31 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 20:51 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 20:36 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 20:15 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 19:56 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 19:34 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 19:16 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 18:53 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 18:39 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 18:12 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 17:49 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 17:33 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 17:17 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 16:56 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 16:39 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
2025/08/24 16:23 android16-6.12 c9198633ac9e bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_put_kvm
* Struck through repros no longer work on HEAD.