From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f77.google.com (mail-io1-f77.google.com [209.85.166.77]) (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 A9F271E502 for ; Sun, 6 Apr 2025 12:32:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743942751; cv=none; b=nppgVd24zgkJtGjR+v8JY15Yr9h662CU3EqlNSD1tCmLa10YvFHIO2AFD5XNmKoflasOcdy4w2lUi8PZKPa12BRsqILvexEOdnBA7GPcgbJCEmSb7rvKBl+SNHIf8FfodC9hbfJN1/S+ZAR46CRSiAhtG7gKrLz4U1VusOVDVTM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743942751; c=relaxed/simple; bh=CEKF0cL6nsrhmPnxpB/a4ShvkceBaHB0DRg2GVEh1HE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=nuy7NkhgfvoywI2NXrYZHMezQlN56o9l2sPN/a/XJ90shIV7c1a+e4Os8fjBDzpEPgERjMFAbZxRzG+/6GH1Vqun/u1TmUa0QDdr3Q6QkK5ILg6x/eQmqnXBelUSivpVgioAgJX/pg0YdjOSSMvyDewNYQD80WSasDQLw4DOiO4= 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=209.85.166.77 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-io1-f77.google.com with SMTP id ca18e2360f4ac-85db3356bafso855335539f.3 for ; Sun, 06 Apr 2025 05:32:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743942749; x=1744547549; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=jF1lzPVnRifEuAh9YGkKDkZBeJE690CwqchrSkh1p/0=; b=wjddLefxRJoyPxsSPnMXew5boVvYNSvOP47KdZdVzLb1Dy2vSuScVlWLd7zdN8BjXu QdHiK1n0A6S62hcIhmuo1PKrS0M6lgOEYJYDyMkxy1VA6Q16z2wEikyYUmb4Pto+VWbM Okow6LllQ6KVrFBpxm2EhiEzqtzU5LFPs7/Whq6pfbbj+vav7UeQliBXNUP9XVGXE7Xg ivUBVWXv6Y6mO/CrFcppHxBPUb8I7nyS50SxWa5yYnonxjlQ8gFFklkywAC6fhvxqRYv GZ3u8H4DUP1vtUxbzWHGId6SHfGiaWtFTmnTS4STTptW9ZySoplnJ1aHkul7E/QZQyho JCHw== X-Forwarded-Encrypted: i=1; AJvYcCWPRHwUL/w0iY4mhUUDCUPGmt2gZM9eJvd9aMX8Mz1EX3GT8FXcfpoyGKzLvlJAbefxewtnGlB4KjuX3G0=@vger.kernel.org X-Gm-Message-State: AOJu0YyhhyExbMU1RjShG8BLZh9Fnj9Wsw3IQ1fMWXGtc8aMDVRLvaWb zajgYbOF31NF95ZmiZ2yqrnCvbICh1o+TpNGMW765in6U4epNitL1PSK9xCx/QqYu1+7RfQEsr2 C+zGmXIBFfHSTYxMKw1+K/M/2OI8yCh0/Fg/8947nmigA0WbxgEUb2ys= X-Google-Smtp-Source: AGHT+IFw6WVMmRbfeCulx0Qcu7+MYCUDH2/Gstw7avVYSKc5ugMp3q5+vqfnepjv+lEyBLYf40G3wpFKkTqFKEPC8vR9xaqfI+Sy Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3082:b0:3d4:70ab:f96f with SMTP id e9e14a558f8ab-3d6e3f06875mr123669375ab.8.1743942748815; Sun, 06 Apr 2025 05:32:28 -0700 (PDT) Date: Sun, 06 Apr 2025 05:32:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67f2745c.050a0220.0a13.0268.GAE@google.com> Subject: [syzbot] [crypto?] KMSAN: uninit-value in sw842_decompress (2) From: syzbot To: ardb@kernel.org, bp@alien8.de, dave.hansen@linux.intel.com, ebiggers@kernel.org, hpa@zytor.com, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: acc4d5ff0b61 Merge tag 'net-6.15-rc0' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14e6694c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=845c633207fbfb03 dashboard link: https://syzkaller.appspot.com/bug?extid=8f77ff6144a73f0cf71b compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2e1f70d143e1/disk-acc4d5ff.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1e092d734e65/vmlinux-acc4d5ff.xz kernel image: https://storage.googleapis.com/syzbot-assets/7a8aec6915ea/bzImage-acc4d5ff.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8f77ff6144a73f0cf71b@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in crc32_be_base+0x255/0x2b0 lib/crc32.c:131 crc32_be_base+0x255/0x2b0 lib/crc32.c:131 crc32_be_arch+0x3d/0x50 arch/x86/lib/crc32-glue.c:77 crc32_be include/linux/crc32.h:28 [inline] sw842_decompress+0x167d/0x1840 lib/842/842_decompress.c:385 crypto842_sdecompress+0x45/0x60 crypto/842.c:57 scomp_acomp_comp_decomp+0xa8d/0xd90 crypto/scompress.c:-1 scomp_acomp_chain crypto/scompress.c:297 [inline] scomp_acomp_decompress+0x39/0x1e0 crypto/scompress.c:313 acomp_do_req_chain+0x39a/0x9f0 crypto/acompress.c:353 crypto_acomp_decompress+0x5f/0x80 crypto/acompress.c:378 zswap_decompress+0x561/0xe00 mm/zswap.c:1018 zswap_load+0x296/0x660 mm/zswap.c:1678 swap_read_folio+0x691/0x3290 mm/page_io.c:643 swap_cluster_readahead+0xb48/0xbd0 mm/swap_state.c:638 swapin_readahead+0x205/0x1690 mm/swap_state.c:814 do_swap_page+0x982/0x9c50 mm/memory.c:4532 handle_pte_fault mm/memory.c:6000 [inline] __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0x3ea4/0xe360 mm/memory.c:6309 do_user_addr_fault arch/x86/mm/fault.c:1337 [inline] handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x41e/0x750 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623 Uninit was created at: __alloc_frozen_pages_noprof+0x6a0/0xe30 mm/page_alloc.c:4957 alloc_pages_mpol+0x4cd/0x890 mm/mempolicy.c:2301 folio_alloc_mpol_noprof+0x57/0x1c0 mm/mempolicy.c:2320 __read_swap_cache_async+0x2b6/0x980 mm/swap_state.c:403 swap_cluster_readahead+0xa94/0xbd0 mm/swap_state.c:635 swapin_readahead+0x205/0x1690 mm/swap_state.c:814 do_swap_page+0x982/0x9c50 mm/memory.c:4532 handle_pte_fault mm/memory.c:6000 [inline] __handle_mm_fault mm/memory.c:6140 [inline] handle_mm_fault+0x3ea4/0xe360 mm/memory.c:6309 do_user_addr_fault arch/x86/mm/fault.c:1337 [inline] handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x41e/0x750 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623 CPU: 0 UID: 0 PID: 25609 Comm: dhcpcd Not tainted 6.14.0-syzkaller-12456-gacc4d5ff0b61 #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ===================================================== --- 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