From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f80.google.com (mail-ot1-f80.google.com [209.85.210.80]) (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 3BD0A35F61E for ; Thu, 2 Apr 2026 05:31:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775107880; cv=none; b=QnTZHNujChiKWK+o6Rd5JRYbf2EpYOGVu8DaU/zZvAc7y7a1kThTBLl20ZYVQc+J3Aju4SaaAwyaiVY4zuWecfv7QeF0DzYjjcHPbAW/YUYPFWOPyH06j44HXi4kSmaGjINXb1AMdPKIa16T/cBFVT8xrTrRrLUfaVRHkA6xjcI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775107880; c=relaxed/simple; bh=fMHUDzHEzwRfwCULRElZyX3ZYKNeeCNv+Z2DJjj327I=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=eW3mJtHB8xQfeCaNpWGeP8BWMNTKbmGaxYsDXlhbpxwbUdWKJZiYiH1nd7HA2vpLcB3SHs3dy19gebld4cOJFBANj/x6FpbAFQcYL9or76Ly8dPuue97o8cW8c2QJX5tUvtQFkhdKZZcxGIWSo78cKTZ3+lGkWpux9cxR66n+kk= 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=209.85.210.80 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-ot1-f80.google.com with SMTP id 46e09a7af769-7d7f23bd25bso1997515a34.0 for ; Wed, 01 Apr 2026 22:31:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775107878; x=1775712678; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=5zYwUZ+kJ5JCIDkvXNgmvlFY7p2RtDq37S2CcSxxxjY=; b=hJHM+ucfc+7E3ozBPKBpq8W/6BmeYOlyNpmoWf0qPUMMVmIJ01WDX+ZVTLIfPMyD4+ qaDpvgAFlp5h5bznCdwV+Lck64hBf+kQ1y04sJqOsUIbo5iaOOV1qCZF7sNd9/DDUFmJ 8GZYVpv7sUUA7lKRqliBv0y4XEDT9XhEBPymEXzFVzeyhC2u8b9zSzPkRoq4NEUmNodQ 9PCVQ3gIhECDXJX5OaOxwRbfgW1Sl3/0c0tgqF5drMy/r2UL4B3qm2qj4I03s7F3SfDt mbG0Ayy6rMW4pPaU0jN4kcS1za/qK1LoM4PW9SlJJPBfyuB04bUAqcbp8BcZDZzIX5hW AccQ== X-Forwarded-Encrypted: i=1; AJvYcCWS4g8hIJ0OmFDhsa9pofFdony0qyPLsCoT8aLJoEM0SKt0nipq/0GsVM7QESJ25Xk0y1aLACx5FznaGLU=@vger.kernel.org X-Gm-Message-State: AOJu0YwwVSLorUuMxrghX28zoq/BcMIyEaoSCv5jxolhu9PjwcXw2TSl JwL7XVAzrYk5pBcYL0T7ybnkRPjtKfHf/hmw70MHNw15VECJPNY4WlcVY42utQKTcjUQdymUj7g YRqbOU+XivkCbKIEP8Z1O0p6yyRqIAh1U8ooL5zJq36gNyuBLg8aVOU28CdA= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:b685:0:b0:67e:411e:64dc with SMTP id 006d021491bc7-680f877107bmr453708eaf.18.1775107878273; Wed, 01 Apr 2026 22:31:18 -0700 (PDT) Date: Wed, 01 Apr 2026 22:31:18 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69cdff26.050a0220.2dbe29.0001.GAE@google.com> Subject: [syzbot] [kernel?] KMSAN: uninit-value in decay_va_pool_node From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, 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: be762d8b6dd7 Merge tag 'hwmon-for-v7.0-rc6' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10755cba580000 kernel config: https://syzkaller.appspot.com/x/.config?x=963de479f54c6dbb dashboard link: https://syzkaller.appspot.com/bug?extid=37b7f6cd519f7fb8d32a compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0594908a4960/disk-be762d8b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8ddd66865f6c/vmlinux-be762d8b.xz kernel image: https://storage.googleapis.com/syzbot-assets/dc2e48fdbf6e/bzImage-be762d8b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+37b7f6cd519f7fb8d32a@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in __list_del_entry_valid include/linux/list.h:-1 [inline] BUG: KMSAN: uninit-value in __list_del_entry include/linux/list.h:223 [inline] BUG: KMSAN: uninit-value in list_del_init include/linux/list.h:295 [inline] BUG: KMSAN: uninit-value in decay_va_pool_node+0xf78/0x1dd0 mm/vmalloc.c:2255 __list_del_entry_valid include/linux/list.h:-1 [inline] __list_del_entry include/linux/list.h:223 [inline] list_del_init include/linux/list.h:295 [inline] decay_va_pool_node+0xf78/0x1dd0 mm/vmalloc.c:2255 __purge_vmap_area_lazy+0x1a1/0x1500 mm/vmalloc.c:2361 _vm_unmap_aliases+0x134c/0x1490 mm/vmalloc.c:2996 vm_reset_perms+0x625/0x900 mm/vmalloc.c:3388 vfree+0x463/0xa10 mm/vmalloc.c:3467 bpf_prog_free_deferred+0xc12/0xc80 kernel/bpf/core.c:-1 process_one_work kernel/workqueue.c:3276 [inline] process_scheduled_works+0xb82/0x1e80 kernel/workqueue.c:3359 worker_thread+0xee4/0x1590 kernel/workqueue.c:3440 kthread+0x53f/0x600 kernel/kthread.c:436 ret_from_fork+0x20f/0x910 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was stored to memory at: __list_del_entry_valid include/linux/list.h:127 [inline] __list_del_entry include/linux/list.h:223 [inline] list_del_init include/linux/list.h:295 [inline] decay_va_pool_node+0xf71/0x1dd0 mm/vmalloc.c:2255 __purge_vmap_area_lazy+0x1a1/0x1500 mm/vmalloc.c:2361 _vm_unmap_aliases+0x134c/0x1490 mm/vmalloc.c:2996 vm_reset_perms+0x625/0x900 mm/vmalloc.c:3388 vfree+0x463/0xa10 mm/vmalloc.c:3467 bpf_prog_free_deferred+0xc12/0xc80 kernel/bpf/core.c:-1 process_one_work kernel/workqueue.c:3276 [inline] process_scheduled_works+0xb82/0x1e80 kernel/workqueue.c:3359 worker_thread+0xee4/0x1590 kernel/workqueue.c:3440 kthread+0x53f/0x600 kernel/kthread.c:436 ret_from_fork+0x20f/0x910 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was created at: slab_post_alloc_hook mm/slub.c:4545 [inline] slab_alloc_node mm/slub.c:4866 [inline] kmem_cache_alloc_node_noprof+0x3cd/0x12d0 mm/slub.c:4918 alloc_vmap_area+0x327/0x2e30 mm/vmalloc.c:2065 __get_vm_area_node+0x263/0x3b0 mm/vmalloc.c:3232 __vmalloc_node_range_noprof+0x44a/0x2d80 mm/vmalloc.c:4024 __vmalloc_node_noprof mm/vmalloc.c:4124 [inline] vzalloc_noprof+0xce/0x140 mm/vmalloc.c:4202 alloc_counters+0x7c/0x8a0 net/ipv4/netfilter/ip_tables.c:799 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:837 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1039 [inline] do_ip6t_get_ctl+0xab1/0x1fc0 net/ipv6/netfilter/ip6_tables.c:1677 nf_getsockopt+0x497/0x4f0 net/netfilter/nf_sockopt.c:116 ipv6_getsockopt+0x323/0x4c0 net/ipv6/ipv6_sockglue.c:1473 tcp_getsockopt+0x174/0x1a0 net/ipv4/tcp.c:4894 sock_common_getsockopt+0x9c/0xf0 net/core/sock.c:3946 do_sock_getsockopt+0x3a8/0x4c0 net/socket.c:2383 __sys_getsockopt net/socket.c:2412 [inline] __do_sys_getsockopt net/socket.c:2419 [inline] __se_sys_getsockopt net/socket.c:2416 [inline] __x64_sys_getsockopt+0x32d/0x520 net/socket.c:2416 x64_sys_call+0x3ab8/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:56 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 7227 Comm: kworker/0:8 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: events bpf_prog_free_deferred ===================================================== --- 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