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linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam12 X-Rspam-User: X-Rspamd-Queue-Id: B776A1C0006 X-Stat-Signature: 1a9psu84mx74rkmcjc3uojqse3qomb1k X-HE-Tag: 1764738936-46328 X-HE-Meta: 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link: https://syzkaller.appspot.com/bug?extid=9ca2c6e6b098bf5ae60a compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=104a30c2580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6b49d8ad90de/disk-7d31f578.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/dbe2d4988ca7/vmlinux-7d31f578.xz kernel image: https://storage.googleapis.com/syzbot-assets/fc0448ab2411/bzImage-7d31f578.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9ca2c6e6b098bf5ae60a@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: kernel/sched/core.c:10573 at sched_mm_cid_fork+0x66/0xc30 kernel/sched/core.c:10573, CPU#0: kworker/u8:4/6077 Modules linked in: CPU: 0 UID: 0 PID: 6077 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(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:10573 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:ffffc90003167bd8 EFLAGS: 00010246 RAX: 1ffff1100584e853 RBX: ffff88802c274298 RCX: ffff88802c273d00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88802c273d00 RBP: ffffc90003167d68 R08: ffffffff8e093e83 R09: 1ffffffff1c127d0 R10: dffffc0000000000 R11: fffffbfff1c127d1 R12: ffff88802c273d00 R13: ffff88802c273d00 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125e4f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcc18973e9c CR3: 000000003470a000 CR4: 00000000003526f0 Call Trace: 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+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup