From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) (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 2B3F9370D6B for ; Thu, 7 May 2026 20:26:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778185592; cv=none; b=tPNeZNPNpy0eUCSFWDQ+j5IfuVUMSNEADRkWLMC2peoynaEFJhcL/03GmGG2+VfOdyT/gM8+TSkSUI2ea+/QUHRe8/nnpDJ4BBDFDUl953fPjd47FLG2ahuoe6oMAIg6UCPvsnGsZwYW7osZPAdxQSM0xpn8L7uO5J1X3j2xv/g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778185592; c=relaxed/simple; bh=+mRaUm9RK1u5rSWnNTOXyhsp6LOZtD1FkYfq248GL4k=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=ZEwwzsVYqdcsyrb0wQHiQcwYVSsj0a5to9eI6x+HaI4s2Xv20Av73OXHxheyxlAW54c3Y1vJRrf12mDgWBziMRH0cNRn53lpXvYvWrweSHklYjsVidW0Wha460BGHhYtOtyPurIabGACPGLGvjLMrX7kME3XKK1YB8/bYLeKzfk= 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=209.85.167.198 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-f198.google.com with SMTP id 5614622812f47-479ef25c477so22073b6e.1 for ; Thu, 07 May 2026 13:26:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778185590; x=1778790390; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=L2WONWyz3vyIeJgP+mk5Nk2Yi6BT4HkHvHdaFwZ2tg8=; b=KoXQ2FTY5LidCSXC/oENKArhdQW1GpIRkAhG3u0oDRI1QXi98Zvj35gBeqr2YjHzeZ 1lwIFFVsXDQSmMWt5SmGVqzgAeb6F0VX17LwTveAFVoFdGYTnft5jnd1BBiUJwIqxECN mobRJuILgnRkGmp1fZy9m+hnJ6+Z2w9TWAfIMIF5btSqbXecI6GqE7QteY2qH8c7SbEr YDhQpUZMsRm/o0NJZS+XsCdapwvD8zWJhCq2FYah8VAt5ORSF2zrKsEnYSC4AM3K3oSo 9MAHYGc6uU5uQ/CDkFOSD2u0sshfh8noZSb51SP4Y1WQrxY2meDWXrsepGbcnID6b64X /ScQ== X-Forwarded-Encrypted: i=1; AFNElJ+639v0r5KgSNNM1sCL7ULNxx31Ok4LQ5AN5mV3YdYmhJ0BdPA8qAQ2nRedQ+9CLrpxu3v8sTOWu0T31I8=@vger.kernel.org X-Gm-Message-State: AOJu0Yz0S5XqGqo7WjGFCxyrwqJHJDbdxi9ltUS1B7MvGLPJUOiR0NQX osrx/MowGV/Q4p0/6IxYqFvs6lk+SplKSjSi6S/PrjeuTQ0GOrDWKQ5uukd/r1LQYd+EUom4+Qb IaMTfBPInIYMjAVrZc6NRhK8BXOBgECTBN2wnFpRJadF09bMCE/oCADfdNMQ= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:906:b0:696:154b:24e with SMTP id 006d021491bc7-69998d0da8dmr5259737eaf.32.1778185590172; Thu, 07 May 2026 13:26:30 -0700 (PDT) Date: Thu, 07 May 2026 13:26:30 -0700 In-Reply-To: <20260507114854.41117-1-jillravaliya@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69fcf576.050a0220.3cf765.035d.GAE@google.com> Subject: [syzbot ci] Re: mm/vmalloc: free unused pages when shrinking vrealloc() allocation From: syzbot ci To: akpm@linux-foundation.org, jillravaliya@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, urezki@gmail.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] mm/vmalloc: free unused pages when shrinking vrealloc() allocation https://lore.kernel.org/all/20260507114854.41117-1-jillravaliya@gmail.com * [PATCH 1/2] mm/vmalloc: free unused pages when shrinking vrealloc() allocation * [PATCH 2/2] selftests/mm: add test for vrealloc() shrink page freeing and found the following issue: kernel BUG in __vunmap_range_noflush Full report is available here: https://ci.syzbot.org/series/13b0874e-a9f8-4992-be93-e93cc88e5e44 *** kernel BUG in __vunmap_range_noflush tree: torvalds URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux base: 2c340aab5485ebe9e33c01437dd4815ef33c8df5 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/625f7138-9b20-4205-b0e7-02ed1219bd31/config syz repro: https://ci.syzbot.org/findings/13e8dc07-d697-4345-a27f-319e9c1fe3d6/syz_repro ------------[ cut here ]------------ kernel BUG at mm/vmalloc.c:488! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 5824 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__vunmap_range_noflush+0xb4d/0xb70 mm/vmalloc.c:488 Code: 00 e9 64 f5 ff ff e8 12 8d a6 ff 48 c7 c7 a0 0e a8 8e 48 8b 74 24 48 48 89 da e8 0e c5 cf 02 e9 67 f5 ff ff e8 f4 8c a6 ff 90 <0f> 0b e8 ec 8c a6 ff e9 53 ff ff ff e8 e2 8c a6 ff bb 02 00 00 00 RSP: 0018:ffffc90003b575e0 EFLAGS: 00010293 RAX: ffffffff821f16bc RBX: ffffc900036fa000 RCX: ffff8881072a1d80 RDX: 0000000000000000 RSI: ffffc900036fa000 RDI: ffffc900036fa000 RBP: ffff88816ebb3980 R08: ffff88810007f1bb R09: 0000000000000000 R10: ffffc900036f9bb0 R11: ffffed102000fe38 R12: 0000000000000001 R13: ffffc900036fa000 R14: ffffc900036fa000 R15: dffffc0000000000 FS: 00007f4d6b8c46c0(0000) GS:ffff8882a9293000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055924f0dd8c0 CR3: 00000001057f2000 CR4: 00000000000006f0 Call Trace: vunmap_range_noflush mm/vmalloc.c:506 [inline] vunmap_range mm/vmalloc.c:521 [inline] vrealloc_node_align_noprof+0x4fc/0x880 mm/vmalloc.c:4346 bpf_patch_insn_data+0xeb/0x10a0 kernel/bpf/fixups.c:254 bpf_convert_ctx_accesses+0x213f/0x2d70 kernel/bpf/fixups.c:974 bpf_check+0x2b8e/0x49f0 kernel/bpf/verifier.c:20094 bpf_prog_load+0x1406/0x1a10 kernel/bpf/syscall.c:3082 __sys_bpf+0x618/0x950 kernel/bpf/syscall.c:6248 __do_sys_bpf kernel/bpf/syscall.c:6361 [inline] __se_sys_bpf kernel/bpf/syscall.c:6359 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6359 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4d6a99cdd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4d6b8c4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f4d6ac15fa0 RCX: 00007f4d6a99cdd9 RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005 RBP: 00007f4d6aa32d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4d6ac16038 R14: 00007f4d6ac15fa0 R15: 00007ffff714fc08 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__vunmap_range_noflush+0xb4d/0xb70 mm/vmalloc.c:488 Code: 00 e9 64 f5 ff ff e8 12 8d a6 ff 48 c7 c7 a0 0e a8 8e 48 8b 74 24 48 48 89 da e8 0e c5 cf 02 e9 67 f5 ff ff e8 f4 8c a6 ff 90 <0f> 0b e8 ec 8c a6 ff e9 53 ff ff ff e8 e2 8c a6 ff bb 02 00 00 00 RSP: 0018:ffffc90003b575e0 EFLAGS: 00010293 RAX: ffffffff821f16bc RBX: ffffc900036fa000 RCX: ffff8881072a1d80 RDX: 0000000000000000 RSI: ffffc900036fa000 RDI: ffffc900036fa000 RBP: ffff88816ebb3980 R08: ffff88810007f1bb R09: 0000000000000000 R10: ffffc900036f9bb0 R11: ffffed102000fe38 R12: 0000000000000001 R13: ffffc900036fa000 R14: ffffc900036fa000 R15: dffffc0000000000 FS: 00007f4d6b8c46c0(0000) GS:ffff8882a9293000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdaf55afd8 CR3: 00000001057f2000 CR4: 00000000000006f0 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a patch for this bug, please reply with `#syz test` (should be on a separate line). The patch should be attached to the email. Note: arguments like custom git repos and branches are not supported.