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syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Stat-Signature: ccp6q35s65k8b8mmnhcrjmk97p9iejqe X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 4286DA0005 X-HE-Tag: 1768721425-159428 X-HE-Meta: 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console output: https://syzkaller.appspot.com/x/log.txt?x=15dbc444580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2dcf53f0a51185 dashboard link: https://syzkaller.appspot.com/bug?extid=c27fa543e10a45d4e149 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=17070522580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1683f99a580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5e077e7eafdc/disk-b775e489.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ea69aef6ee56/vmlinux-b775e489.xz kernel image: https://storage.googleapis.com/syzbot-assets/b8b6986280d1/bzImage-b775e489.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c27fa543e10a45d4e149@syzkaller.appspotmail.com R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007f16655e5fa0 R14: 00007f16655e5fa0 R15: 0000000000000002 ------------[ cut here ]------------ WARNING: mm/rmap.c:480 at unlink_anon_vmas+0x701/0x730 mm/rmap.c:480, CPU#0: syz.0.20/5987 Modules linked in: CPU: 0 UID: 0 PID: 5987 Comm: syz.0.20 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:unlink_anon_vmas+0x701/0x730 mm/rmap.c:480 Code: ac ff 48 83 c4 40 5b 41 5c 41 5d 41 5e 41 5f 5d e9 84 df 56 09 cc e8 8e ed ac ff 90 0f 0b 90 e9 e2 f9 ff ff e8 80 ed ac ff 90 <0f> 0b 90 eb d3 48 c7 c1 10 ab c4 8f 80 e1 07 80 c1 03 38 c1 0f 8c RSP: 0018:ffffc900033676c0 EFLAGS: 00010293 RAX: ffffffff821460b0 RBX: dffffc0000000000 RCX: ffff88802a773c80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8fc47af7 R09: 1ffffffff1f88f5e R10: dffffc0000000000 R11: fffffbfff1f88f5f R12: 1ffff110062fbaa8 R13: ffff888027aad900 R14: ffff8880317dd510 R15: ffff8880317dd530 FS: 0000555592787500(0000) GS:ffff8881259ad000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f166526615a CR3: 000000002f0cc000 CR4: 00000000003526f0 Call Trace: anon_vma_fork+0x4b9/0x500 mm/rmap.c:438 dup_mmap+0x954/0x1b80 mm/mmap.c:1790 dup_mm kernel/fork.c:1529 [inline] copy_mm+0x13c/0x4b0 kernel/fork.c:1581 copy_process+0x1812/0x3ba0 kernel/fork.c:2218 kernel_clone+0x21e/0x820 kernel/fork.c:2648 __do_sys_clone3 kernel/fork.c:2950 [inline] __se_sys_clone3+0x256/0x2d0 kernel/fork.c:2929 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f166538f749 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:00007ffe55f4df08 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 0000000000000058 RCX: 00007f166538f749 RDX: 00007ffe55f4df20 RSI: 0000000000000058 RDI: 00007ffe55f4df20 RBP: 00007ffe55f4e090 R08: 0000000000000000 R09: 0000000000000058 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007f16655e5fa0 R14: 00007f16655e5fa0 R15: 0000000000000002 --- 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