===================================================== BUG: KMSAN: uninit-value in enc_quarterround lib/crypto/aes.c:333 [inline] BUG: KMSAN: uninit-value in aes_encrypt_generic lib/crypto/aes.c:371 [inline] BUG: KMSAN: uninit-value in aes_encrypt_arch lib/crypto/aes.c:467 [inline] BUG: KMSAN: uninit-value in aes_encrypt+0x92d/0x11b0 lib/crypto/aes.c:507 enc_quarterround lib/crypto/aes.c:333 [inline] aes_encrypt_generic lib/crypto/aes.c:371 [inline] aes_encrypt_arch lib/crypto/aes.c:467 [inline] aes_encrypt+0x92d/0x11b0 lib/crypto/aes.c:507 crypto_aes_encrypt+0x3f/0x50 crypto/aes.c:28 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+0x3ce/0x800 fs/crypto/crypto.c:197 ext4_bio_write_folio+0x139f/0x3110 fs/ext4/page-io.c:572 mpage_submit_folio+0x399/0x3d0 fs/ext4/inode.c:2103 mpage_process_page_bufs+0xaef/0xf50 fs/ext4/inode.c:2214 mpage_process_folio fs/ext4/inode.c:2267 [inline] mpage_map_and_submit_buffers fs/ext4/inode.c:2336 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2536 [inline] ext4_do_writepages+0x3a87/0x7850 fs/ext4/inode.c:2948 ext4_writepages+0x337/0x870 fs/ext4/inode.c:3042 do_writepages+0x3f2/0x860 mm/page-writeback.c:2571 __writeback_single_inode+0x101/0x10a0 fs/fs-writeback.c:1764 writeback_sb_inodes+0xb1a/0x1d50 fs/fs-writeback.c:2056 __writeback_inodes_wb+0x14e/0x480 fs/fs-writeback.c:2132 wb_writeback+0x4ff/0xc50 fs/fs-writeback.c:2243 wb_check_start_all fs/fs-writeback.c:2369 [inline] wb_do_writeback fs/fs-writeback.c:2395 [inline] wb_workfn+0xe13/0x1970 fs/fs-writeback.c:2428 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3385 worker_thread+0xee4/0x1590 kernel/workqueue.c:3466 kthread+0x53f/0x600 kernel/kthread.c:436 ret_from_fork+0x20f/0x8d0 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+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+0x3ce/0x800 fs/crypto/crypto.c:197 ext4_bio_write_folio+0x139f/0x3110 fs/ext4/page-io.c:572 mpage_submit_folio+0x399/0x3d0 fs/ext4/inode.c:2103 mpage_process_page_bufs+0xaef/0xf50 fs/ext4/inode.c:2214 mpage_process_folio fs/ext4/inode.c:2267 [inline] mpage_map_and_submit_buffers fs/ext4/inode.c:2336 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2536 [inline] ext4_do_writepages+0x3a87/0x7850 fs/ext4/inode.c:2948 ext4_writepages+0x337/0x870 fs/ext4/inode.c:3042 do_writepages+0x3f2/0x860 mm/page-writeback.c:2571 __writeback_single_inode+0x101/0x10a0 fs/fs-writeback.c:1764 writeback_sb_inodes+0xb1a/0x1d50 fs/fs-writeback.c:2056 __writeback_inodes_wb+0x14e/0x480 fs/fs-writeback.c:2132 wb_writeback+0x4ff/0xc50 fs/fs-writeback.c:2243 wb_check_start_all fs/fs-writeback.c:2369 [inline] wb_do_writeback fs/fs-writeback.c:2395 [inline] wb_workfn+0xe13/0x1970 fs/fs-writeback.c:2428 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3385 worker_thread+0xee4/0x1590 kernel/workqueue.c:3466 kthread+0x53f/0x600 kernel/kthread.c:436 ret_from_fork+0x20f/0x8d0 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+0x6fa/0x1000 mm/page_alloc.c:5249 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof mm/mempolicy.c:2581 [inline] folio_alloc_noprof+0x108/0x370 mm/mempolicy.c:2591 filemap_alloc_folio_noprof+0xd9/0x480 mm/filemap.c:1014 __filemap_get_folio_mpol+0xb43/0x1960 mm/filemap.c:2012 __filemap_get_folio include/linux/pagemap.h:763 [inline] write_begin_get_folio include/linux/pagemap.h:789 [inline] ext4_write_begin+0x6e3/0x2d80 fs/ext4/inode.c:1331 ext4_da_write_begin+0x75e/0x1450 fs/ext4/inode.c:3152 generic_perform_write+0x364/0x1050 mm/filemap.c:4325 ext4_buffered_write_iter+0x178/0x7b0 fs/ext4/file.c:316 ext4_file_write_iter+0x104c/0x3880 fs/ext4/file.c:-1 do_iter_readv_writev+0x9e0/0xc10 fs/read_write.c:-1 vfs_writev+0x52a/0x1500 fs/read_write.c:1059 do_pwritev fs/read_write.c:1155 [inline] __do_compat_sys_pwritev2 fs/read_write.c:1300 [inline] __se_compat_sys_pwritev2 fs/read_write.c:1292 [inline] __ia32_compat_sys_pwritev2+0x43d/0x6b0 fs/read_write.c:1292 ia32_sys_call+0x3b67/0x4360 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+0x180/0x460 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: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: writeback wb_workfn (flush-7:8) =====================================================