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WARNING in sched_mm_cid_fork

Status: upstream: reported C repro on 2025/12/03 05:15
Subsystems: fs mm
[Documentation on labels]
Reported-by: syzbot+9ca2c6e6b098bf5ae60a@syzkaller.appspotmail.com
First crash: 60d, last: 1d15h
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] exec: do not call sched_mm_cid_after_execve() on exec fail 2 (2) 2025/12/24 12:10
[syzbot] [fs?] [mm?] WARNING in sched_mm_cid_fork 0 (6) 2025/12/24 03:34
▶ ▼ Last patch testing requests (4)
Created Duration User Patch Repo Result
2025/12/24 03:34 15m wangjinchao600@gmail.com upstream report log
2025/12/23 10:39 14m wangjinchao600@gmail.com patch upstream error
2025/12/18 02:24 20m wangjinchao600@gmail.com patch upstream error
2025/12/18 01:50 20m wangjinchao600@gmail.com patch upstream error

Sample crash report:
------------[ cut here ]------------
WARNING: kernel/sched/core.c:10569 at sched_mm_cid_fork+0x66/0xc30 kernel/sched/core.c:10569, CPU#0: kworker/u4:25/5667
Modules linked in:
CPU: 0 UID: 0 PID: 5667 Comm: kworker/u4:25 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:sched_mm_cid_fork+0x66/0xc30 kernel/sched/core.c:10569
Code: 4c 8b 3b 4d 85 ff 74 21 49 8d 9d d4 15 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 13 0a 00 00 31 c0 3b 03 70 04 90 <0f> 0b 90 49 8d 9f 00 01 00 00 49 8d bf c0 01 00 00 48 89 7c 24 20
RSP: 0018:ffffc9000381fc18 EFLAGS: 00010246
RAX: 1ffff110077410b3 RBX: ffff88803ba08598 RCX: ffff88803ba08000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88803ba08000
RBP: ffffc9000381fda8 R08: ffffffff8e095ec3 R09: 1ffffffff1c12bd8
R10: dffffc0000000000 R11: fffffbfff1c12bd9 R12: ffff88803ba08000
R13: ffff88803ba08000 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8b7400000 CR3: 0000000034f8f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 bprm_execve+0xd88/0x1400 fs/exec.c:1776
 kernel_execve+0x8f0/0x9f0 fs/exec.c:1919
 call_usermodehelper_exec_async+0x210/0x360 kernel/umh.c:109
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Crashes (331):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/10 21:04 upstream 54e82e93ca93 d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/12 00:24 upstream d358e5254674 d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 21:08 upstream 3f9f0252130e d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in sched_mm_cid_fork
2025/12/03 19:56 upstream 3f9f0252130e d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in sched_mm_cid_fork
2026/01/02 04:05 upstream b69053dd3ffb d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/30 14:37 upstream 8640b74557fc d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in sched_mm_cid_fork
2025/12/28 16:38 upstream d26143bb38e2 d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in sched_mm_cid_fork
2025/12/28 07:21 upstream d26143bb38e2 d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in sched_mm_cid_fork
2025/12/21 07:22 upstream d8ba32c5a460 d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/19 05:54 upstream 516471569089 d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in sched_mm_cid_fork
2025/12/15 07:33 upstream 8f0b4cce4481 d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in sched_mm_cid_fork
2025/12/10 13:38 upstream c9b47175e913 d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in sched_mm_cid_fork
2025/12/03 05:26 upstream 44fc84337b6e d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/11/29 23:23 linux-next 7d31f578f323 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in sched_mm_cid_fork
2026/01/10 03:32 upstream 372800cb95a3 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in sched_mm_cid_fork
2026/01/02 06:47 upstream b69053dd3ffb d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in sched_mm_cid_fork
2026/01/02 01:46 upstream b69053dd3ffb d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in sched_mm_cid_fork
2025/12/03 05:25 upstream 619f4edc8d4f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in sched_mm_cid_fork
2025/12/20 13:39 upstream dd9b004b7ff3 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in sched_mm_cid_fork
2026/01/20 07:52 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/20 04:14 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/20 02:21 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/19 21:54 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/19 13:35 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/19 11:15 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/19 07:36 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/19 04:30 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/18 19:31 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/18 18:23 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/18 14:52 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/18 13:15 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/17 21:33 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/17 19:50 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/17 10:00 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/17 05:51 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/17 01:16 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/17 00:06 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/16 22:49 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/16 20:48 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/16 14:39 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/16 13:31 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/16 11:49 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/16 07:54 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/16 03:46 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/16 00:15 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/15 23:00 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/15 21:49 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/15 06:42 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/15 00:33 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/14 21:23 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/14 18:45 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/14 07:42 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/13 17:21 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/13 15:32 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/13 12:09 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/13 09:28 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/13 02:24 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/12 23:53 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/12 20:09 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/12 04:58 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/11 23:17 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/11 21:36 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/11 05:50 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/11 03:53 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/10 17:27 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/10 16:11 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2026/01/10 12:38 upstream 54e82e93ca93 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/19 02:18 bpf ea1013c15392 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in sched_mm_cid_fork
2025/12/13 06:35 net 885bebac9909 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in sched_mm_cid_fork
2026/01/13 06:32 net-next 2f2d896ec59a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in sched_mm_cid_fork
2026/01/07 20:18 bpf-next 2175ccfb93fd d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in sched_mm_cid_fork
2026/01/18 21:43 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing fa3bb5011f33 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in sched_mm_cid_fork
2026/01/04 08:18 linux-next cc3aa43b44bd d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in sched_mm_cid_fork
2025/12/18 01:15 linux-next 12b95d29eb97 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in sched_mm_cid_fork
2026/01/26 18:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in sched_mm_cid_fork
* Struck through repros no longer work on HEAD.