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kees@kernel.org, linux-fsdevel@vger.kernel.org, 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-Queue-Id: 7F60210000E X-Rspamd-Server: rspam03 X-Stat-Signature: 5h7j9mjbjwyrme4f3djy1yorupdukf6f X-Rspam-User: X-HE-Tag: 1765499126-138769 X-HE-Meta: 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git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11c0d1c2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=de48dccdf203ea90 dashboard 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=144621b4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=124621b4580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-d358e525.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3fa1d04c1a85/vmlinux-d358e525.xz kernel image: https://storage.googleapis.com/syzbot-assets/a9b253146e36/bzImage-d358e525.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/4a5df3575982/mount_1.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=11119592580000) 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:10569 at sched_mm_cid_fork+0x66/0xc30 kernel/sched/core.c:10569, CPU#0: kworker/u4:4/5674 Modules linked in: CPU: 0 UID: 0 PID: 5674 Comm: kworker/u4:4 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: 0000:ffffc900036cfbd8 EFLAGS: 00010246 RAX: 1ffff110067b79e3 RBX: ffff888033dbcf18 RCX: ffff888033dbc980 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888033dbc980 RBP: ffffc900036cfd68 R08: ffffffff8e295e83 R09: 1ffffffff1c52bd0 R10: dffffc0000000000 R11: fffffbfff1c52bd1 R12: ffff888033dbc980 R13: ffff888033dbc980 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88808d22f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ad913e000 CR3: 0000000041a50000 CR4: 0000000000352ef0 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 --- 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.