From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 9DA062FF653 for ; Tue, 14 Oct 2025 14:50:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760453439; cv=none; b=OVsuMJt/QeMfDI4LA6YMiefBDwYIyIQABuZtgnmwFPU0MYLcqpA0hUFBbfpBinXe+vmo0lpYrn0X/aRTvpPwWnDJEXXuaVKGBAc45afKq4kvUd5YiyrMdkJ+ecolf3nymkIfcDgCWplqVKYGQSfp38CIdQPOnfkzrNAHpoNXQgA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760453439; c=relaxed/simple; bh=WBIdf1PaikHecpubelq05cegP0L27isbRJGMXaU/Dk0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=lZ+vchaD1rhTD/HAM9W9IiWpCZlfhOFValw+lLruQbo1X7f/NG4Xx94U7plZYxtEhn7PkENWggji/hFtRFfnWqajH9rRRZMupA1ioIgWG5n0D/MXiVdBR3XsSD7LrZ+00I7V4BDaR2gduQbIVWFZMltT5aZdE1y33U/4W2roPDU= 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=209.85.166.208 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-il1-f208.google.com with SMTP id e9e14a558f8ab-42f989e2030so117647495ab.2 for ; Tue, 14 Oct 2025 07:50:37 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760453437; x=1761058237; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Z8PtWzect3QXv79Fy+/g+zWxxtYKh2X3YZ2rtikGVGg=; b=dV65KdNwUzFKxKlSwdL1+A6ZOoPTFQqH2jOPvt+kQVHvHKIj/28HOPJ9dwCTQXLZsP cJ5fPmqylbOpRhWjk6/qqHyeYPxAU3XurqI1AUcuaHIdNATU9RAaOkdih40m5QWb94F5 VC8DIADDK4BCfvwhoeie1mIgYQDLK1JIxwU40+OEYqMSLDahL1ghDpPdv3EKJkzDPelP NCzlFWzstTaxlY0eKOCLb3Mp8ovY38kfpPB0RWcqb9avGdFuiQLlSg9JoiY88vBBmB3z pnFLgRJI3YJac/loAjLsr+XypdUowJ6UM7NTasQq8xEdGAHOQHs6IA0Q9Fg/229SQEs2 niQA== X-Forwarded-Encrypted: i=1; AJvYcCVvMGkx2eW2ufwUSH7l48ZPNYnt5msoU5iz/0RK9neX4gzRv0MK+JgzC0fd8bfU/P8puJCCV95PBeAQkrE=@vger.kernel.org X-Gm-Message-State: AOJu0YxRMbVud44XtIzoNT4lqAEF7J+S02FZsyn8KhPX8VMOEyfxY8I9 N7DTOknJPpXqEz8pzuqYGVpc9TX/UHsMQPBhngvgx97xpxhL5jR662ODNkE2feewD1UUP2rauCM KOkrn7eQHLWxj18SHrSPUsaDTniaxA0Q7gdYev9IeMHsvz/XwIM0Ju8xdGOo= X-Google-Smtp-Source: AGHT+IF2wEZJR1y/MWn185G0kFP/ky/VeNQhv6GND9ix7rMYc8ScAwUgiVo1GUD7YVemWjNoghs2OMHskRick/iqhhIzQX7akfGJ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1544:b0:42f:9e92:a434 with SMTP id e9e14a558f8ab-42f9e92bb45mr140891015ab.21.1760453436724; Tue, 14 Oct 2025 07:50:36 -0700 (PDT) Date: Tue, 14 Oct 2025 07:50:36 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68ee633c.050a0220.1186a4.002a.GAE@google.com> Subject: [syzbot] [crypto?] KMSAN: uninit-value in fscrypt_crypt_data_unit From: syzbot To: davem@davemloft.net, herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 3a8660878839 Linux 6.18-rc1 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13d25dcd980000 kernel config: https://syzkaller.appspot.com/x/.config?x=bbd3e7f3c2e28265 dashboard link: https://syzkaller.appspot.com/bug?extid=7add5c56bc2a14145d20 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/d996feb56093/disk-3a866087.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fa6f6bc3b02a/vmlinux-3a866087.xz kernel image: https://storage.googleapis.com/syzbot-assets/7571083a68d6/bzImage-3a866087.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7add5c56bc2a14145d20@syzkaller.appspotmail.com EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ===================================================== BUG: KMSAN: uninit-value in subshift lib/crypto/aes.c:150 [inline] BUG: KMSAN: uninit-value in aes_encrypt+0x1239/0x1960 lib/crypto/aes.c:283 subshift lib/crypto/aes.c:150 [inline] aes_encrypt+0x1239/0x1960 lib/crypto/aes.c:283 aesti_encrypt+0x7d/0xf0 crypto/aes_ti.c:31 crypto_ecb_crypt crypto/ecb.c:23 [inline] crypto_ecb_encrypt2+0x142/0x300 crypto/ecb.c:40 crypto_lskcipher_crypt_sg+0x3ac/0x930 crypto/lskcipher.c:188 crypto_lskcipher_encrypt_sg+0x8b/0xc0 crypto/lskcipher.c:207 crypto_skcipher_encrypt+0x111/0x1e0 crypto/skcipher.c:194 xts_encrypt+0x2e1/0x570 crypto/xts.c:269 crypto_skcipher_encrypt+0x18a/0x1e0 crypto/skcipher.c:195 fscrypt_crypt_data_unit+0x38e/0x590 fs/crypto/crypto.c:139 fscrypt_encrypt_pagecache_blocks+0x430/0x900 fs/crypto/crypto.c:197 ext4_bio_write_folio+0x1383/0x30d0 fs/ext4/page-io.c:552 mpage_submit_folio fs/ext4/inode.c:2080 [inline] mpage_process_page_bufs+0xf1b/0x13e0 fs/ext4/inode.c:2191 mpage_prepare_extent_to_map+0x1792/0x2a10 fs/ext4/inode.c:2736 ext4_do_writepages+0x11b6/0x8020 fs/ext4/inode.c:2877 ext4_writepages+0x338/0x870 fs/ext4/inode.c:3025 do_writepages+0x3f2/0x860 mm/page-writeback.c:2604 filemap_fdatawrite_wbc mm/filemap.c:389 [inline] __filemap_fdatawrite_range mm/filemap.c:422 [inline] file_write_and_wait_range+0x6f0/0x7d0 mm/filemap.c:797 generic_buffers_fsync_noflush+0x79/0x3c0 fs/buffer.c:609 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x587/0x12f0 fs/ext4/fsync.c:147 vfs_fsync_range+0x1a1/0x240 fs/sync.c:187 generic_write_sync include/linux/fs.h:3046 [inline] ext4_buffered_write_iter+0xae9/0xce0 fs/ext4/file.c:305 ext4_file_write_iter+0x2a2/0x3d90 fs/ext4/file.c:-1 new_sync_write fs/read_write.c:593 [inline] vfs_write+0xbe2/0x15d0 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x2ab/0x3b0 fs/read_write.c:798 x64_sys_call+0xe77/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: le128_xor include/crypto/b128ops.h:69 [inline] xts_xor_tweak+0x566/0xbd0 crypto/xts.c:123 xts_xor_tweak_pre crypto/xts.c:135 [inline] xts_encrypt+0x278/0x570 crypto/xts.c:268 crypto_skcipher_encrypt+0x18a/0x1e0 crypto/skcipher.c:195 fscrypt_crypt_data_unit+0x38e/0x590 fs/crypto/crypto.c:139 fscrypt_encrypt_pagecache_blocks+0x430/0x900 fs/crypto/crypto.c:197 ext4_bio_write_folio+0x1383/0x30d0 fs/ext4/page-io.c:552 mpage_submit_folio fs/ext4/inode.c:2080 [inline] mpage_process_page_bufs+0xf1b/0x13e0 fs/ext4/inode.c:2191 mpage_prepare_extent_to_map+0x1792/0x2a10 fs/ext4/inode.c:2736 ext4_do_writepages+0x11b6/0x8020 fs/ext4/inode.c:2877 ext4_writepages+0x338/0x870 fs/ext4/inode.c:3025 do_writepages+0x3f2/0x860 mm/page-writeback.c:2604 filemap_fdatawrite_wbc mm/filemap.c:389 [inline] __filemap_fdatawrite_range mm/filemap.c:422 [inline] file_write_and_wait_range+0x6f0/0x7d0 mm/filemap.c:797 generic_buffers_fsync_noflush+0x79/0x3c0 fs/buffer.c:609 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x587/0x12f0 fs/ext4/fsync.c:147 vfs_fsync_range+0x1a1/0x240 fs/sync.c:187 generic_write_sync include/linux/fs.h:3046 [inline] ext4_buffered_write_iter+0xae9/0xce0 fs/ext4/file.c:305 ext4_file_write_iter+0x2a2/0x3d90 fs/ext4/file.c:-1 new_sync_write fs/read_write.c:593 [inline] vfs_write+0xbe2/0x15d0 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x2ab/0x3b0 fs/read_write.c:798 x64_sys_call+0xe77/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:5206 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2416 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof mm/mempolicy.c:2507 [inline] folio_alloc_noprof+0x109/0x360 mm/mempolicy.c:2517 filemap_alloc_folio_noprof+0x9d/0x420 mm/filemap.c:1020 __filemap_get_folio+0xb45/0x1930 mm/filemap.c:2012 write_begin_get_folio include/linux/pagemap.h:784 [inline] ext4_write_begin+0x6d9/0x2d70 fs/ext4/inode.c:1318 generic_perform_write+0x365/0x1050 mm/filemap.c:4242 ext4_buffered_write_iter+0x61a/0xce0 fs/ext4/file.c:299 ext4_file_write_iter+0x2a2/0x3d90 fs/ext4/file.c:-1 new_sync_write fs/read_write.c:593 [inline] vfs_write+0xbe2/0x15d0 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x2ab/0x3b0 fs/read_write.c:798 x64_sys_call+0xe77/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 5879 Comm: syz.5.3882 Tainted: G W syzkaller #0 PREEMPT(none) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ===================================================== --- 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