syzbot

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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
 __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_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
 __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: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
 aio_write+0x704/0xa10 fs/aio.c:1634
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x260e/0x3450 fs/aio.c:2053
 __do_compat_sys_io_submit fs/aio.c:2154 [inline]
 __se_compat_sys_io_submit fs/aio.c:2124 [inline]
 __ia32_compat_sys_io_submit+0x30d/0x7c0 fs/aio.c:2124
 ia32_sys_call+0x3e40/0x4310 arch/x86/include/generated/asm/syscalls_32.h:249
 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: 0 UID: 0 PID: 1325 Comm: kworker/u8:7 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: writeback wb_workfn (flush-7:6)
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