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Message-ID: <68ea2595.a70a0220.b3ac9.0006.GAE@google.com> Date: Sat, 11 Oct 2025 02:38:29 -0700 From: syzbot <syzbot+22bff16a8f91d65e2e58@...kaller.appspotmail.com> To: davem@...emloft.net, herbert@...dor.apana.org.au, linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [crypto?] KMSAN: uninit-value in aes_encrypt (6) Hello, syzbot found the following issue on: HEAD commit: 917167ed1211 Merge tag 'xtensa-20251010' of https://github.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10f55304580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3b820eb4c6dd8482 dashboard link: https://syzkaller.appspot.com/bug?extid=22bff16a8f91d65e2e58 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f8b165efe52b/disk-917167ed.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/01b56300cdc7/vmlinux-917167ed.xz kernel image: https://storage.googleapis.com/syzbot-assets/6c32d21e8075/bzImage-917167ed.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+22bff16a8f91d65e2e58@...kaller.appspotmail.com EXT4-fs error (device loop5): ext4_orphan_get:1418: comm syz.5.10451: bad orphan inode 131083 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ===================================================== 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+0x13f/0x300 crypto/ecb.c:40 crypto_lskcipher_crypt_sg+0x3a9/0x930 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+0x187/0x1e0 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+0x3ef/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 do_iter_readv_writev+0x9de/0xc20 fs/read_write.c:-1 vfs_writev+0x52a/0x1500 fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_compat_sys_pwritev2 fs/read_write.c:1298 [inline] __se_compat_sys_pwritev2 fs/read_write.c:1290 [inline] __ia32_compat_sys_pwritev2+0x43d/0x6b0 fs/read_write.c:1290 ia32_sys_call+0x1810/0x4310 arch/x86/include/generated/asm/syscalls_32.h:380 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e 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+0x187/0x1e0 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+0x3ef/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 do_iter_readv_writev+0x9de/0xc20 fs/read_write.c:-1 vfs_writev+0x52a/0x1500 fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_compat_sys_pwritev2 fs/read_write.c:1298 [inline] __se_compat_sys_pwritev2 fs/read_write.c:1290 [inline] __ia32_compat_sys_pwritev2+0x43d/0x6b0 fs/read_write.c:1290 ia32_sys_call+0x1810/0x4310 arch/x86/include/generated/asm/syscalls_32.h:380 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e 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+0x362/0x1050 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 do_iter_readv_writev+0x9de/0xc20 fs/read_write.c:-1 vfs_writev+0x52a/0x1500 fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_compat_sys_pwritev2 fs/read_write.c:1298 [inline] __se_compat_sys_pwritev2 fs/read_write.c:1290 [inline] __ia32_compat_sys_pwritev2+0x43d/0x6b0 fs/read_write.c:1290 ia32_sys_call+0x1810/0x4310 arch/x86/include/generated/asm/syscalls_32.h:380 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e CPU: 1 UID: 0 PID: 8113 Comm: syz.5.10451 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@...glegroups.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
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