From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F2FD360EF4 for ; Mon, 22 Jun 2026 06:59:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782111562; cv=none; b=exV2pkK2bWDN0GwLyx1X+mnhut7qtJMwnMuqZzgetA8BC8XPH7gbLM15rsG1XjSrlI5pS4GRQWq+h1jekJsRgIgJES3FXr0c8SeGIf0PoJXCtLKzdaY1d+aXCjAC3WXgfzj0vsD2ru+Qr94/75nXzKWqTrmnibLRbfZzA8J7fTE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782111562; c=relaxed/simple; bh=AgcuzwIjjv8yYFF8QnqEVbIJ9+BBcQRSlSd2ixjkgcI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Oq6pUq1cPt4SFgqZrbolksZUfHQyGgP5U7Pcb8Xqr2VQj1VMuA27Ar8oOz1CM4d6J5TzE7w4QEiR/wYKyOlVXC8i9NPi+mi9akdWxnFvzur46javpn2DithVNdC+0dVgEPR31CvSjUHa127tGXUiz0lQKIXbSOZRlaMjYx0Gx38= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.208 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f208.google.com with SMTP id 5614622812f47-485fdae1db3so7123055b6e.1 for ; Sun, 21 Jun 2026 23:59:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782111559; x=1782716359; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=dee/d/lype2pOO/ItFtdTcT37BMlTqmm2dUXLU1k+7Q=; b=LQmqXM7rW4mLWEa+IJDLG6alRmUjLAfvJzmfEoU2h8kby8Za7MJflgLxLTOdwFa7Vn TTrROEdUwFPYrx1+fncbyX3nPSELQm0i/k7VEpuYEUF8BcVKkw7BLPwoFBpvkjglNHeU keHhM/0tOuZ1305vfU0fvZBz6fZffHykT6L3mogmwuDllC18Ofiym1/XbzA0sXLwGh65 BzeGnSCkQvrR0Kr6iYIrxGNedbLbyOrCvQDbYlhVVndtEmtjMzQYs0JhjKcUiFPGaZgL OGLYq7jaTfay4xU3mpcYZWEY0sc60m1pZ25cYGAvIk0ay2B+/PTKky4UXavW7TysPd36 B7ww== X-Forwarded-Encrypted: i=1; AFNElJ9+IggSEmh8n1ve9+fWOBe5XpsV06Da/kOIR1eBmT7+yTGFmox0UbZ359OnXV9GHjnvE+EwUoM40xtFh6mUx9cU87Q=@vger.kernel.org X-Gm-Message-State: AOJu0YxNkyvtV9POpCvwckdrM8lEf8veQ9eCH2N+TxK4BKz4MI92Tpmd Wil90BmpzgjRRTrTNQm0NDhUPCaoxu4cbKGRGnvifZoVfaOG/l9pIf6vZD+oZZXfK94d2dAhqQ/ 5hBE3Vw0PAftx1D50BVTDNv0b1nUH7is140XB4oHUs/Qmbfi3hphok4UbKAA= Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:14d6:b0:489:61e0:544a with SMTP id 5614622812f47-48ac065c421mr7636488b6e.22.1782111559702; Sun, 21 Jun 2026 23:59:19 -0700 (PDT) Date: Sun, 21 Jun 2026 23:59:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a38dd47.713c5d62.148f7.000c.GAE@google.com> Subject: [syzbot] [trace?] general protection fault in mtree_load From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mhiramat@kernel.org, mingo@redhat.com, oleg@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@kernel.org, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 6b5a2b7d9bc1 Merge tag 'trace-tools-v7.2' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16d56986580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ea6584355d75e0cd dashboard link: https://syzkaller.appspot.com/bug?extid=61ce80689253f42e6d80 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-6b5a2b7d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b3cb0499fbe9/vmlinux-6b5a2b7d.xz kernel image: https://storage.googleapis.com/syzbot-assets/47cfbe57f6ea/bzImage-6b5a2b7d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+61ce80689253f42e6d80@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000011: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f] CPU: 3 UID: 0 PID: 24402 Comm: syz.4.5217 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:mas_root lib/maple_tree.c:759 [inline] RIP: 0010:mas_start lib/maple_tree.c:1179 [inline] RIP: 0010:mtree_load+0x16d/0xa90 lib/maple_tree.c:5657 Code: 00 00 00 00 48 c7 44 24 78 ff ff ff ff e8 6b bd 84 f6 48 8b 5c 24 50 c6 84 24 9c 00 00 00 00 48 8d 7b 48 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 d6 08 00 00 48 8b 5b 48 e8 6f 1a 08 00 31 ff RSP: 0018:ffffc900039c76d8 EFLAGS: 00010206 RAX: 0000000000000011 RBX: 0000000000000040 RCX: ffffffff8b848746 RDX: ffff888041b6a540 RSI: ffffffff8b848775 RDI: 0000000000000088 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 000000000000751b R12: dffffc0000000000 R13: ffff88802693adc0 R14: 00001fff904365a7 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880d665f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f44aa04f156 CR3: 00000000364d5000 CR4: 0000000000352ef0 Call Trace: vma_lookup include/linux/mm.h:4204 [inline] __in_uprobe_trampoline arch/x86/kernel/uprobes.c:766 [inline] __is_optimized arch/x86/kernel/uprobes.c:1056 [inline] is_optimized arch/x86/kernel/uprobes.c:1067 [inline] set_orig_insn+0x1ec/0x2a0 arch/x86/kernel/uprobes.c:1098 remove_breakpoint kernel/events/uprobes.c:1185 [inline] register_for_each_vma+0xbb7/0xdb0 kernel/events/uprobes.c:1318 uprobe_unregister_nosync+0x12a/0x1c0 kernel/events/uprobes.c:1343 bpf_uprobe_unregister kernel/trace/bpf_trace.c:2936 [inline] bpf_uprobe_multi_link_release+0xb3/0x1c0 kernel/trace/bpf_trace.c:2947 bpf_link_free+0xec/0x4a0 kernel/bpf/syscall.c:3273 bpf_link_put_direct kernel/bpf/syscall.c:3326 [inline] bpf_link_release+0x5d/0x80 kernel/bpf/syscall.c:3333 __fput+0x3ff/0xb50 fs/file_table.c:512 task_work_run+0x150/0x240 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x951/0x2ae0 kernel/exit.c:1004 do_group_exit+0xd5/0x2a0 kernel/exit.c:1147 get_signal+0x1ec7/0x21e0 kernel/signal.c:3038 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop+0x139/0x6f0 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] ret_from_fork+0x932/0xd50 arch/x86/kernel/process.c:167 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mas_root lib/maple_tree.c:759 [inline] RIP: 0010:mas_start lib/maple_tree.c:1179 [inline] RIP: 0010:mtree_load+0x16d/0xa90 lib/maple_tree.c:5657 Code: 00 00 00 00 48 c7 44 24 78 ff ff ff ff e8 6b bd 84 f6 48 8b 5c 24 50 c6 84 24 9c 00 00 00 00 48 8d 7b 48 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 d6 08 00 00 48 8b 5b 48 e8 6f 1a 08 00 31 ff RSP: 0018:ffffc900039c76d8 EFLAGS: 00010206 RAX: 0000000000000011 RBX: 0000000000000040 RCX: ffffffff8b848746 RDX: ffff888041b6a540 RSI: ffffffff8b848775 RDI: 0000000000000088 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 000000000000751b R12: dffffc0000000000 R13: ffff88802693adc0 R14: 00001fff904365a7 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880d665f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c433cbf CR3: 00000000429b6000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 48 c7 44 24 78 ff ff movq $0xffffffffffffffff,0x78(%rsp) b: ff ff d: e8 6b bd 84 f6 call 0xf684bd7d 12: 48 8b 5c 24 50 mov 0x50(%rsp),%rbx 17: c6 84 24 9c 00 00 00 movb $0x0,0x9c(%rsp) 1e: 00 1f: 48 8d 7b 48 lea 0x48(%rbx),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 0f 85 d6 08 00 00 jne 0x90b 35: 48 8b 5b 48 mov 0x48(%rbx),%rbx 39: e8 6f 1a 08 00 call 0x81aad 3e: 31 ff xor %edi,%edi --- 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 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