From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 61A171BC2A for ; Wed, 3 Dec 2025 01:57:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764727049; cv=none; b=YLzuWkFXrdQBCGnTFpFgmLAc8PRhfB8XxVlc6saCuSKyse3l8XBpfHFC6nnA+b+bU5y6KX93yoxjYaWc7WLaoqT8VDTK2yy8VucLg4J6PTQgDy8+YVoTu/+YinSkuhZKy7/QP28uFjUZCfvjRyw85LWa+DKaWpEJv0MjiefSIzQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764727049; c=relaxed/simple; bh=+6t665L7JElpLOaVjFqHc+JPAwrJCKZ5m+0YDlZlEVk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1c05:b0:453:f62:dddc with SMTP id 5614622812f47-4536e3a415cmr300036b6e.7.1764727046475; Tue, 02 Dec 2025 17:57:26 -0800 (PST) Date: Tue, 02 Dec 2025 17:57:26 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <692f9906.a70a0220.d98e3.01ae.GAE@google.com> Subject: [syzbot] [crypto?] KMSAN: uninit-value in adiantum_crypt 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: 6cf62f0174de Merge tag 'char-misc-6.18-rc8' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1727df42580000 kernel config: https://syzkaller.appspot.com/x/.config?x=61a9bf3cc5d17a01 dashboard link: https://syzkaller.appspot.com/bug?extid=703d8a2cd20971854b06 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13bfa112580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=169e422c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fb216361ff9c/disk-6cf62f01.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/eb55e25eb970/vmlinux-6cf62f01.xz kernel image: https://storage.googleapis.com/syzbot-assets/5110f00a1a4e/bzImage-6cf62f01.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/7a62729c5268/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=16dd8112580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+703d8a2cd20971854b06@syzkaller.appspotmail.com ===================================================== 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 cipher_crypt_one+0x120/0x2e0 crypto/cipher.c:75 crypto_cipher_encrypt_one+0x33/0x40 crypto/cipher.c:82 adiantum_crypt+0x939/0xe60 crypto/adiantum.c:383 adiantum_encrypt+0x33/0x40 crypto/adiantum.c:419 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_map_and_submit_buffers fs/ext4/inode.c:2324 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2514 [inline] ext4_do_writepages+0x3c08/0x8020 fs/ext4/inode.c:2931 ext4_writepages+0x338/0x870 fs/ext4/inode.c:3025 do_writepages+0x3f2/0x860 mm/page-writeback.c:2604 __writeback_single_inode+0x101/0x1190 fs/fs-writeback.c:1719 writeback_sb_inodes+0xac1/0x1cb0 fs/fs-writeback.c:2015 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2195 wb_do_writeback fs/fs-writeback.c:2342 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2382 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3346 worker_thread+0xedf/0x1590 kernel/workqueue.c:3427 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x1f5/0x4c0 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: le128_add crypto/adiantum.c:191 [inline] adiantum_crypt+0xcf7/0xe60 crypto/adiantum.c:379 adiantum_encrypt+0x33/0x40 crypto/adiantum.c:419 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_map_and_submit_buffers fs/ext4/inode.c:2324 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2514 [inline] ext4_do_writepages+0x3c08/0x8020 fs/ext4/inode.c:2931 ext4_writepages+0x338/0x870 fs/ext4/inode.c:3025 do_writepages+0x3f2/0x860 mm/page-writeback.c:2604 __writeback_single_inode+0x101/0x1190 fs/fs-writeback.c:1719 writeback_sb_inodes+0xac1/0x1cb0 fs/fs-writeback.c:2015 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2195 wb_do_writeback fs/fs-writeback.c:2342 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2382 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3346 worker_thread+0xedf/0x1590 kernel/workqueue.c:3427 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x1f5/0x4c0 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: adiantum_crypt+0x531/0xe60 crypto/adiantum.c:368 adiantum_encrypt+0x33/0x40 crypto/adiantum.c:419 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_map_and_submit_buffers fs/ext4/inode.c:2324 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2514 [inline] ext4_do_writepages+0x3c08/0x8020 fs/ext4/inode.c:2931 ext4_writepages+0x338/0x870 fs/ext4/inode.c:3025 do_writepages+0x3f2/0x860 mm/page-writeback.c:2604 __writeback_single_inode+0x101/0x1190 fs/fs-writeback.c:1719 writeback_sb_inodes+0xac1/0x1cb0 fs/fs-writeback.c:2015 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2195 wb_do_writeback fs/fs-writeback.c:2342 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2382 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3346 worker_thread+0xedf/0x1590 kernel/workqueue.c:3427 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x1f5/0x4c0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was created at: __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:5201 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 ext4_da_write_begin+0x77c/0x1490 fs/ext4/inode.c:3129 generic_perform_write+0x365/0x1050 mm/filemap.c:4255 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: 3651 Comm: kworker/u8:15 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: writeback wb_workfn (flush-7:0) ===================================================== --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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