syzbot


WARNING in sched_mm_cid_fork

Status: upstream: reported syz repro on 2025/12/03 05:15
Subsystems: fs mm
[Documentation on labels]
Reported-by: syzbot+9ca2c6e6b098bf5ae60a@syzkaller.appspotmail.com
First crash: 6d18h, last: 5h43m
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
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[syzbot] [fs?] [mm?] WARNING in sched_mm_cid_fork 0 (1) 2025/12/03 05:15

Sample crash report:
------------[ cut here ]------------
WARNING: kernel/sched/core.c:10564 at sched_mm_cid_fork+0x66/0xc30 kernel/sched/core.c:10564, CPU#0: kworker/u8:16/6086
Modules linked in:
CPU: 0 UID: 0 PID: 6086 Comm: kworker/u8:16 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:sched_mm_cid_fork+0x66/0xc30 kernel/sched/core.c:10564
Code: 4c 8b 3b 4d 85 ff 74 21 49 8d 9d 6c 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 40 01 00 00 49 8d bf 00 02 00 00 48 89 7c 24 20
RSP: 0018:ffffc90003207bd8 EFLAGS: 00010246
RAX: 1ffff11004a56833 RBX: ffff8880252b4198 RCX: ffff8880252b3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880252b3c00
RBP: ffffc90003207d68 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1ade4b9 R12: ffff8880252b3c00
R13: ffff8880252b3c00 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888126d83000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffe12b6b58 CR3: 000000003a9d8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 bprm_execve+0xd8e/0x1400 fs/exec.c:1776
 kernel_execve+0x8f0/0x9f0 fs/exec.c:1919
 call_usermodehelper_exec_async+0x213/0x360 kernel/umh.c:109
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Crashes (48):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
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
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
2025/12/03 04:07 upstream 619f4edc8d4f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in sched_mm_cid_fork
2025/12/03 04:07 upstream 619f4edc8d4f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in sched_mm_cid_fork
2025/12/05 18:18 upstream 2061f18ad76e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/05 12:53 upstream 2061f18ad76e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/05 11:38 upstream 2061f18ad76e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/05 07:38 upstream 6dfafbd0299a d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/04 17:36 upstream cc25df3e2e22 d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 21:52 upstream 3f9f0252130e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 11:43 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 10:37 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 07:05 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:38 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:03 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:02 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:02 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:02 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:01 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:01 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:01 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 04:01 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 03:48 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 03:48 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 03:35 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 03:09 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 03:09 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 02:55 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/03 02:54 upstream 44fc84337b6e d1b870e1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in sched_mm_cid_fork
2025/12/04 13:13 net-next 8f7aa3d3c732 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in sched_mm_cid_fork
2025/11/29 05:06 linux-next 7d31f578f323 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in sched_mm_cid_fork
* Struck through repros no longer work on HEAD.