EXT4-fs (loop8): Test dummy encryption mode enabled EXT4-fs (loop8): mounted filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /84/file0 supports timestamps until 2038-01-19 (0x7fffffff) ===================================================== 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_map_and_submit_buffers fs/ext4/inode.c:2346 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2536 [inline] ext4_do_writepages+0x3c54/0x7850 fs/ext4/inode.c:2948 ext4_writepages+0x337/0x870 fs/ext4/inode.c:3042 do_writepages+0x3f2/0x860 mm/page-writeback.c:2571 filemap_writeback mm/filemap.c:388 [inline] filemap_fdatawrite_range mm/filemap.c:413 [inline] file_write_and_wait_range+0x6f0/0x7d0 mm/filemap.c:787 mmb_fsync_noflush+0x82/0x3a0 fs/buffer.c:645 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline] ext4_sync_file+0x619/0x1490 fs/ext4/fsync.c:160 vfs_fsync_range+0x135/0x1c0 fs/sync.c:186 generic_write_sync include/linux/fs.h:2654 [inline] ext4_buffered_write_iter+0x5b3/0x7b0 fs/ext4/file.c:322 ext4_file_write_iter+0x104c/0x3880 fs/ext4/file.c:-1 new_sync_write fs/read_write.c:595 [inline] vfs_write+0xbe1/0x15c0 fs/read_write.c:688 ksys_pwrite64+0x1d6/0x2a0 fs/read_write.c:795 __do_sys_ia32_pwrite64 arch/x86/kernel/sys_ia32.c:79 [inline] __se_sys_ia32_pwrite64 arch/x86/kernel/sys_ia32.c:76 [inline] __ia32_sys_ia32_pwrite64+0xf0/0x150 arch/x86/kernel/sys_ia32.c:76 ia32_sys_call+0xb47/0x4360 arch/x86/include/generated/asm/syscalls_32.h:182 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 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_map_and_submit_buffers fs/ext4/inode.c:2346 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2536 [inline] ext4_do_writepages+0x3c54/0x7850 fs/ext4/inode.c:2948 ext4_writepages+0x337/0x870 fs/ext4/inode.c:3042 do_writepages+0x3f2/0x860 mm/page-writeback.c:2571 filemap_writeback mm/filemap.c:388 [inline] filemap_fdatawrite_range mm/filemap.c:413 [inline] file_write_and_wait_range+0x6f0/0x7d0 mm/filemap.c:787 mmb_fsync_noflush+0x82/0x3a0 fs/buffer.c:645 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline] ext4_sync_file+0x619/0x1490 fs/ext4/fsync.c:160 vfs_fsync_range+0x135/0x1c0 fs/sync.c:186 generic_write_sync include/linux/fs.h:2654 [inline] ext4_buffered_write_iter+0x5b3/0x7b0 fs/ext4/file.c:322 ext4_file_write_iter+0x104c/0x3880 fs/ext4/file.c:-1 new_sync_write fs/read_write.c:595 [inline] vfs_write+0xbe1/0x15c0 fs/read_write.c:688 ksys_pwrite64+0x1d6/0x2a0 fs/read_write.c:795 __do_sys_ia32_pwrite64 arch/x86/kernel/sys_ia32.c:79 [inline] __se_sys_ia32_pwrite64 arch/x86/kernel/sys_ia32.c:76 [inline] __ia32_sys_ia32_pwrite64+0xf0/0x150 arch/x86/kernel/sys_ia32.c:76 ia32_sys_call+0xb47/0x4360 arch/x86/include/generated/asm/syscalls_32.h:182 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 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 new_sync_write fs/read_write.c:595 [inline] vfs_write+0xbe1/0x15c0 fs/read_write.c:688 ksys_pwrite64+0x1d6/0x2a0 fs/read_write.c:795 __do_sys_ia32_pwrite64 arch/x86/kernel/sys_ia32.c:79 [inline] __se_sys_ia32_pwrite64 arch/x86/kernel/sys_ia32.c:76 [inline] __ia32_sys_ia32_pwrite64+0xf0/0x150 arch/x86/kernel/sys_ia32.c:76 ia32_sys_call+0xb47/0x4360 arch/x86/include/generated/asm/syscalls_32.h:182 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: 1 UID: 0 PID: 19856 Comm: syz.8.3232 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 =====================================================