From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 466A531D37C for ; Wed, 10 Sep 2025 12:35:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757507735; cv=none; b=o3AbA+f34pqADYQV3oso3cIIJlMAHRuVgqoY8Cx5LGWDFssVeh6y9jzaigzjLn5AcjmtPj80i1QA5OUiRWfZY4cDPijQ4a8B0uQBgJUtQnoIcnl/WsioMKbZh4Y25NR/rL1/7Pd9I+UFucF2QwcxD4ksrppsvAjr8A2gkONePfA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757507735; c=relaxed/simple; bh=YvZEAXaowQR36siTReaoCci7LRUtXdxCRrBuhPOjl74=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=BRlJGaZik6bt95EGB58KouzhxT+5bskt0KuplbhDkK/TAn2FFFBx6UO1IAWDr91uyuge64xqiMZ09enrzn6PHuCVfyFUm46XW6EBw4T3GQYDTCbZ4HOwevD8amJp//0hXxP7d8P0u33FREM6+6YqFt+Clwvy/7QEZAe3dGloUeU= 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=209.85.166.207 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-il1-f207.google.com with SMTP id e9e14a558f8ab-3ffbd7e6662so50969895ab.0 for ; Wed, 10 Sep 2025 05:35:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757507732; x=1758112532; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=yf3HksuGDvdFhsxx6nkK7e8YHDdD/H22VcMIwJxIl2w=; b=LhQR0Psbf78ig+1C19522/HOC+ok+uQOcbd3oxiEiBWWQQZgyq7CXwqU4fjkij0iiH qMlizBurLiw+Xzj3i9aXs0BkuIMw11OsB8cK4KYk8v3syq2+rnIbr2rDEIMJOoYEvKDN n+CrDzhavJN4YFkhGAgORnJV5X1NJLv8Tzh0MrueFNKvFyevU/1GkxJkCY1gMCwWmwyp 1DR3hsj4hzC6YWVNLvwp6F5nJheaZqneRGmV4Rg+2vBy9y674jBdceRUJ8LCeNMSFNjN 3viVP0M4vQJq9wbYatXifsq1DmS+gegCPgklBy9La5+rggY4xltrimm/69iyCUbmqrn3 +y7w== X-Forwarded-Encrypted: i=1; AJvYcCXPyVsbHlQ2qdq3nqFiz1iBGDp9JTcoc7OCD55UN+6AQHjVvfG5LYDgI3K4sGJOKqzaA8qZS6SKckqFU8A=@vger.kernel.org X-Gm-Message-State: AOJu0YzYE7DtEcvzTItc5SLY5xLGCVj4B1Kykey5j8VATzMpDi54P9f1 kur6ijP7p001lPk21YSwzb+JgBF+JLIzA4WHjy4vAg5O2jFboTAjja85sVAl1EWlVx09yDP+QUQ Al0SgzVhwypTOX5PA3TvsevoaXfaq68KixZXDIWksJekdWcShsSnjEw1AN9w= X-Google-Smtp-Source: AGHT+IFZFxaZPS26lp8nYaF+DSjAOMPPpTFrsM3kQdmD9U2BfhAjHIl8KXRacMIRmk6w7XNFvXb93y1ZFL57FpLJZVZECw1WyCBL Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:184c:b0:3f6:55e5:1914 with SMTP id e9e14a558f8ab-3fd94458067mr235498475ab.18.1757507732292; Wed, 10 Sep 2025 05:35:32 -0700 (PDT) Date: Wed, 10 Sep 2025 05:35:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68c17094.050a0220.3c6139.0021.GAE@google.com> Subject: [syzbot] [mm?] KMSAN: uninit-value in __run_timer_base (2) From: syzbot To: akpm@linux-foundation.org, axelrasmussen@google.com, baohua@kernel.org, bhe@redhat.com, chrisl@kernel.org, kasong@tencent.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nphamcs@gmail.com, shikemeng@huaweicloud.com, syzkaller-bugs@googlegroups.com, weixugc@google.com, yuanchu@google.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d1d10cea0895 Merge tag 'perf-tools-fixes-for-v6.17-2025-09.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1583ba42580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1ee07385471829e7 dashboard link: https://syzkaller.appspot.com/bug?extid=7d660d9b8bd5efc7ee6e compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b803befa3a5f/disk-d1d10cea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9f37cb94f110/vmlinux-d1d10cea.xz kernel image: https://storage.googleapis.com/syzbot-assets/68d1d6d1e102/bzImage-d1d10cea.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7d660d9b8bd5efc7ee6e@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in __hlist_del include/linux/list.h:980 [inline] BUG: KMSAN: uninit-value in detach_timer kernel/time/timer.c:891 [inline] BUG: KMSAN: uninit-value in expire_timers kernel/time/timer.c:1781 [inline] BUG: KMSAN: uninit-value in __run_timers kernel/time/timer.c:2372 [inline] BUG: KMSAN: uninit-value in __run_timer_base+0x690/0xd90 kernel/time/timer.c:2384 __hlist_del include/linux/list.h:980 [inline] detach_timer kernel/time/timer.c:891 [inline] expire_timers kernel/time/timer.c:1781 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x690/0xd90 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0x3a/0x80 kernel/time/timer.c:2403 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x66/0x180 kernel/softirq.c:680 irq_exit_rcu+0x12/0x20 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x84/0x90 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 kmsan_metadata_is_contiguous+0x10b/0x1e0 mm/kmsan/core.c:-1 kmsan_get_shadow_origin_ptr+0x27/0xb0 mm/kmsan/shadow.c:96 get_shadow_origin_ptr mm/kmsan/instrumentation.c:38 [inline] __msan_metadata_ptr_for_load_8+0x24/0x40 mm/kmsan/instrumentation.c:94 is_last_frame arch/x86/kernel/unwind_frame.c:87 [inline] is_last_task_frame+0x2e/0x370 arch/x86/kernel/unwind_frame.c:156 unwind_next_frame+0x60/0x350 arch/x86/kernel/unwind_frame.c:276 arch_stack_walk+0x1b1/0x280 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xc3/0x100 kernel/stacktrace.c:122 kmsan_save_stack_with_flags mm/kmsan/core.c:73 [inline] kmsan_internal_poison_memory+0x4a/0xa0 mm/kmsan/core.c:57 kmsan_free_page+0xd5/0x160 mm/kmsan/shadow.c:210 free_pages_prepare mm/page_alloc.c:1317 [inline] free_unref_folios+0x270/0x2a20 mm/page_alloc.c:2952 folios_put_refs+0xaac/0xb10 mm/swap.c:997 folios_put include/linux/mm.h:1419 [inline] __folio_batch_release+0xe1/0x100 mm/swap.c:1057 folio_batch_release include/linux/pagevec.h:101 [inline] shmem_undo_range+0x926/0x2100 mm/shmem.c:1157 shmem_truncate_range mm/shmem.c:1269 [inline] shmem_evict_inode+0x232/0xed0 mm/shmem.c:1397 evict+0x6fd/0xd00 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x996/0xdd0 fs/inode.c:1923 dentry_unlink_inode+0x5ce/0x6d0 fs/dcache.c:466 __dentry_kill+0x340/0xbf0 fs/dcache.c:669 dput+0xdd/0x240 fs/dcache.c:911 __fput+0xb0a/0x1040 fs/file_table.c:476 ____fput+0x25/0x30 fs/file_table.c:496 task_work_run+0x206/0x2b0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0x2a6/0x330 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x1e3/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4197 [inline] slab_alloc_node mm/slub.c:4240 [inline] __kmalloc_cache_noprof+0x7f7/0xed0 mm/slub.c:4402 kmalloc_noprof include/linux/slab.h:905 [inline] rose_add_node net/rose/rose_route.c:85 [inline] rose_rt_ioctl+0x1fc7/0x3b30 net/rose/rose_route.c:748 rose_ioctl+0x4f8/0xc60 net/rose/af_rose.c:1381 sock_do_ioctl+0x9f/0x480 net/socket.c:1238 sock_ioctl+0x70b/0xd60 net/socket.c:1359 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0x239/0x400 fs/ioctl.c:584 __x64_sys_ioctl+0x97/0xe0 fs/ioctl.c:584 x64_sys_call+0x1cbc/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 30968 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(none) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 ===================================================== --- 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