=====================================================
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+0x3d/0xa0 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+0x3ad/0x960 crypto/lskcipher.c:188
 crypto_lskcipher_encrypt_sg+0x8b/0xc0 crypto/lskcipher.c:207
 crypto_skcipher_encrypt+0x111/0x1e0 crypto/skcipher.c:443
 xts_encrypt+0x2e1/0x570 crypto/xts.c:269
 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+0x1383/0x30b0 fs/ext4/page-io.c:552
 mpage_submit_folio+0x399/0x3d0 fs/ext4/inode.c:2087
 mpage_process_page_bufs+0xaef/0xf50 fs/ext4/inode.c:2198
 mpage_process_folio fs/ext4/inode.c:2251 [inline]
 mpage_map_and_submit_buffers fs/ext4/inode.c:2320 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2520 [inline]
 ext4_do_writepages+0x3a94/0x7770 fs/ext4/inode.c:2932
 ext4_writepages+0x337/0x870 fs/ext4/inode.c:3026
 do_writepages+0x3f2/0x860 mm/page-writeback.c:2598
 __writeback_single_inode+0x101/0x1180 fs/fs-writeback.c:1737
 writeback_sb_inodes+0xb2d/0x1f10 fs/fs-writeback.c:2030
 wb_writeback+0x4d0/0xc00 fs/fs-writeback.c:2216
 wb_do_writeback fs/fs-writeback.c:2363 [inline]
 wb_workfn+0x397/0x1900 fs/fs-writeback.c:2403
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xae7/0x1d60 kernel/workqueue.c:3340
 worker_thread+0x1741/0x1de0 kernel/workqueue.c:3421
 kthread+0xd5a/0xf00 kernel/kthread.c:463
 ret_from_fork+0x207/0x6f0 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_xor include/crypto/b128ops.h:69 [inline]
 xts_xor_tweak+0x576/0xa90 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: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+0x1383/0x30b0 fs/ext4/page-io.c:552
 mpage_submit_folio+0x399/0x3d0 fs/ext4/inode.c:2087
 mpage_process_page_bufs+0xaef/0xf50 fs/ext4/inode.c:2198
 mpage_process_folio fs/ext4/inode.c:2251 [inline]
 mpage_map_and_submit_buffers fs/ext4/inode.c:2320 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2520 [inline]
 ext4_do_writepages+0x3a94/0x7770 fs/ext4/inode.c:2932
 ext4_writepages+0x337/0x870 fs/ext4/inode.c:3026
 do_writepages+0x3f2/0x860 mm/page-writeback.c:2598
 __writeback_single_inode+0x101/0x1180 fs/fs-writeback.c:1737
 writeback_sb_inodes+0xb2d/0x1f10 fs/fs-writeback.c:2030
 wb_writeback+0x4d0/0xc00 fs/fs-writeback.c:2216
 wb_do_writeback fs/fs-writeback.c:2363 [inline]
 wb_workfn+0x397/0x1900 fs/fs-writeback.c:2403
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xae7/0x1d60 kernel/workqueue.c:3340
 worker_thread+0x1741/0x1de0 kernel/workqueue.c:3421
 kthread+0xd5a/0xf00 kernel/kthread.c:463
 ret_from_fork+0x207/0x6f0 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+0x6df/0xf50 mm/page_alloc.c:5263
 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+0x108/0x360 mm/mempolicy.c:2587
 filemap_alloc_folio_noprof+0xd9/0x480 mm/filemap.c:1013
 __filemap_get_folio_mpol+0xb43/0x1960 mm/filemap.c:2006
 __filemap_get_folio include/linux/pagemap.h:774 [inline]
 write_begin_get_folio include/linux/pagemap.h:800 [inline]
 ext4_write_begin+0x6dd/0x2d50 fs/ext4/inode.c:1323
 ext4_da_write_begin+0x75e/0x1420 fs/ext4/inode.c:3130
 generic_perform_write+0x364/0x1050 mm/filemap.c:4314
 ext4_buffered_write_iter+0x61a/0xce0 fs/ext4/file.c:299
 ext4_file_write_iter+0x25fa/0x3eb0 fs/ext4/file.c:-1
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0xbe1/0x15c0 fs/read_write.c:686
 ksys_write+0x1d9/0x470 fs/read_write.c:738
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __ia32_sys_write+0x9a/0xf0 fs/read_write.c:746
 ia32_sys_call+0x3d5e/0x4340 arch/x86/include/generated/asm/syscalls_32.h:5
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x14a/0x310 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 1 UID: 0 PID: 19896 Comm: kworker/u8:0 Tainted: G        W    L      syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: writeback wb_workfn (flush-7:4)
=====================================================