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AHgh+Rpg7Gj8YlvcRpPJwNH4x2tg/lCPB6ajlUJ5KkpuLtpTwWmKmcGR0R55RmZtJ1/0rksrmYBdky+nbk5G6cc=@vger.kernel.org X-Gm-Message-State: AOJu0YwSV9CfkOVmLx6FPyiiJd+SBMW8RUtDVWdxloVICqZYLkYfpGYi ISljoCRBTKqjlXq5uKtje8hm7zOkKBhQW6YlFEMuP5R+DkodHHJB+B2I5EGlYFs00Mqx7zsm8iB O9SQv7efcRUBB7825+lLiXg+fdS1mI7rzzubIXOErN7YmqSHuMB/f9FZj1l0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:4f48:b0:495:d7ec:b6be with SMTP id 5614622812f47-4ae4c424710mr871943b6e.18.1785483032617; Fri, 31 Jul 2026 00:30:32 -0700 (PDT) Date: Fri, 31 Jul 2026 00:30:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6c4f18.b1a781d0.210f9.001f.GAE@google.com> Subject: [syzbot] [mm?] WARNING in mas_nomem From: syzbot To: akpm@linux-foundation.org, jannh@google.com, liam@infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, pfalcato@suse.de, syzkaller-bugs@googlegroups.com, vbabka@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: cc2b5f627e8c Add linux-next specific files for 20260714 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15ce5632580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2290ccbf984c524f dashboard link: https://syzkaller.appspot.com/bug?extid=78a7af91b68fc6394771 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=179151b9580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6836f8efb1da/disk-cc2b5f62.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0109d3477cc7/vmlinux-cc2b5f62.xz kernel image: https://storage.googleapis.com/syzbot-assets/c2e49e350bbf/bzImage-cc2b5f62.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+78a7af91b68fc6394771@syzkaller.appspotmail.com ------------[ cut here ]------------ !mas->sheaf && !mas->alloc WARNING: lib/maple_tree.c:5751 at mas_nomem+0x1cc/0x210 lib/maple_tree.c:5751, CPU#0: udevd/5627 Modules linked in: CPU: 0 UID: 0 PID: 5627 Comm: udevd Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:mas_nomem+0x1cc/0x210 lib/maple_tree.c:5751 Code: 4c 89 ff e8 d6 85 ea f6 49 c7 07 00 00 00 00 b0 01 e9 95 fe ff ff e8 f3 2d 7e f6 90 0f 0b 90 e9 2b ff ff ff e8 e5 2d 7e f6 90 <0f> 0b 90 e9 77 fe ff ff 89 d1 80 e1 07 80 c1 03 38 c1 0f 8c ce fe RSP: 0018:ffffc9000562f8f0 EFLAGS: 00010293 RAX: ffffffff8b4775cb RBX: 1ffff92000ac5fbf RCX: ffff8880366e3e80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000cc0 R08: 00000000ffffffff R09: 1ffffffff1ca1a86 R10: dffffc0000000000 R11: fffffbfff1ca1a87 R12: dffffc0000000000 R13: ffffc9000562fe18 R14: ffffc9000562fde0 R15: ffffc9000562fdf8 FS: 00007f9021203880(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056467bb0d750 CR3: 0000000046416000 CR4: 00000000003526f0 Call Trace: mas_store_gfp+0x37a/0x820 lib/maple_tree.c:4987 vma_iter_clear_gfp include/linux/mm.h:1674 [inline] do_vmi_align_munmap+0x30c/0x4d0 mm/vma.c:1644 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1697 __vm_munmap+0x241/0x3e0 mm/vma.c:3347 __do_sys_munmap mm/mmap.c:1079 [inline] __se_sys_munmap mm/mmap.c:1076 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1076 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9021368097 Code: 73 01 c3 48 8b 0d 61 2d 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 2d 0d 00 f7 d8 64 89 01 48 RSP: 002b:00007ffeaf32d0a8 EFLAGS: 00000206 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 000056467bad9bf0 RCX: 00007f9021368097 RDX: 0000000000000000 RSI: 00000000009480e8 RDI: 00007f90208ba000 RBP: 000056467bad9910 R08: 000056467baec140 R09: 0000000000000006 R10: 0000000000000000 R11: 0000000000000206 R12: 00005646569e2588 R13: 00007ffeaf32d130 R14: 0000000000000000 R15: 0000000000000000 --- 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