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List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2223:b0:65b:336f:f33a with SMTP id 006d021491bc7-65b45201660mr3043059eaf.38.1765668905968; Sat, 13 Dec 2025 15:35:05 -0800 (PST) Date: Sat, 13 Dec 2025 15:35:05 -0800 In-Reply-To: <20251213224229.1116077-2-katharasasikumar007@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <693df829.050a0220.326d2b.000b.GAE@google.com> Subject: Re: [syzbot] [crypto?] KMSAN: uninit-value in adiantum_crypt From: syzbot To: katharasasikumar007@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in adiantum_crypt ===================================================== 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+0x948/0xe70 crypto/adiantum.c:385 adiantum_encrypt+0x33/0x40 crypto/adiantum.c:421 crypto_skcipher_encrypt+0x18a/0x1e0 crypto/skcipher.c:444 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+0x399/0x3d0 fs/ext4/inode.c:2087 mpage_map_and_submit_buffers fs/ext4/inode.c:2330 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2520 [inline] ext4_do_writepages+0x3c93/0x77a0 fs/ext4/inode.c:2932 ext4_writepages+0x338/0x870 fs/ext4/inode.c:3026 do_writepages+0x3f2/0x860 mm/page-writeback.c:2598 __writeback_single_inode+0x101/0x1190 fs/fs-writeback.c:1737 writeback_sb_inodes+0xb2d/0x1f10 fs/fs-writeback.c:2030 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2216 wb_do_writeback fs/fs-writeback.c:2363 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2403 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3340 worker_thread+0xedf/0x1590 kernel/workqueue.c:3421 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x208/0x710 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Uninit was stored to memory at: le128_add crypto/adiantum.c:191 [inline] adiantum_crypt+0xd06/0xe70 crypto/adiantum.c:381 adiantum_encrypt+0x33/0x40 crypto/adiantum.c:421 crypto_skcipher_encrypt+0x18a/0x1e0 crypto/skcipher.c:444 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+0x399/0x3d0 fs/ext4/inode.c:2087 mpage_map_and_submit_buffers fs/ext4/inode.c:2330 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2520 [inline] ext4_do_writepages+0x3c93/0x77a0 fs/ext4/inode.c:2932 ext4_writepages+0x338/0x870 fs/ext4/inode.c:3026 do_writepages+0x3f2/0x860 mm/page-writeback.c:2598 __writeback_single_inode+0x101/0x1190 fs/fs-writeback.c:1737 writeback_sb_inodes+0xb2d/0x1f10 fs/fs-writeback.c:2030 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2216 wb_do_writeback fs/fs-writeback.c:2363 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2403 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3340 worker_thread+0xedf/0x1590 kernel/workqueue.c:3421 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x208/0x710 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Uninit was stored to memory at: adiantum_crypt+0x531/0xe70 crypto/adiantum.c:369 adiantum_encrypt+0x33/0x40 crypto/adiantum.c:421 crypto_skcipher_encrypt+0x18a/0x1e0 crypto/skcipher.c:444 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+0x399/0x3d0 fs/ext4/inode.c:2087 mpage_map_and_submit_buffers fs/ext4/inode.c:2330 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2520 [inline] ext4_do_writepages+0x3c93/0x77a0 fs/ext4/inode.c:2932 ext4_writepages+0x338/0x870 fs/ext4/inode.c:3026 do_writepages+0x3f2/0x860 mm/page-writeback.c:2598 __writeback_single_inode+0x101/0x1190 fs/fs-writeback.c:1737 writeback_sb_inodes+0xb2d/0x1f10 fs/fs-writeback.c:2030 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2216 wb_do_writeback fs/fs-writeback.c:2363 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2403 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3340 worker_thread+0xedf/0x1590 kernel/workqueue.c:3421 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x208/0x710 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Uninit was created at: __alloc_frozen_pages_noprof+0x421/0xab0 mm/page_alloc.c:5233 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof mm/mempolicy.c:2577 [inline] folio_alloc_noprof+0x109/0x360 mm/mempolicy.c:2587 filemap_alloc_folio_noprof+0xda/0x480 mm/filemap.c:1013 __filemap_get_folio_mpol+0xb4f/0x1960 mm/filemap.c:2006 __filemap_get_folio include/linux/pagemap.h:763 [inline] write_begin_get_folio include/linux/pagemap.h:789 [inline] ext4_write_begin+0x6d3/0x2d70 fs/ext4/inode.c:1323 ext4_da_write_begin+0x75e/0x1430 fs/ext4/inode.c:3130 generic_perform_write+0x365/0x1050 mm/filemap.c:4314 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+0xbaf/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 3691 Comm: kworker/u8:20 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) ===================================================== Tested on: commit: 4a298a43 Merge tag 'smp-urgent-2025-12-12' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=177909c2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f7b71d5ee1eca763 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 patch: https://syzkaller.appspot.com/x/patch.diff?x=15cb9e1a580000