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BUG: KMSAN: uninit-value in sw842_compress+0x266c/0x5990 lib/842/842_compress.c:540
 sw842_compress+0x266c/0x5990 lib/842/842_compress.c:540
 crypto842_scompress+0x4f/0x70 crypto/842.c:78
 scomp_acomp_comp_decomp+0x7c6/0xb90
 scomp_acomp_compress+0x32/0x40 crypto/scompress.c:187
 crypto_acomp_compress include/crypto/acompress.h:251 [inline]
 zswap_compress mm/zswap.c:924 [inline]
 zswap_store_page mm/zswap.c:1426 [inline]
 zswap_store+0x1c0f/0x47d0 mm/zswap.c:1533
 swap_writepage+0xa67/0x1950 mm/page_io.c:279
 shmem_writepage+0x2375/0x25c0 mm/shmem.c:1579
 pageout mm/vmscan.c:689 [inline]
 shrink_folio_list+0x5e7f/0x7dd0 mm/vmscan.c:1367
 evict_folios+0x9e08/0xbeb0 mm/vmscan.c:4593
 try_to_shrink_lruvec+0x1342/0x1810 mm/vmscan.c:4789
 shrink_one+0x646/0xd20 mm/vmscan.c:4834
 shrink_many mm/vmscan.c:4897 [inline]
 lru_gen_shrink_node mm/vmscan.c:4975 [inline]
 shrink_node+0x4578/0x51c0 mm/vmscan.c:5956
 kswapd_shrink_node mm/vmscan.c:6785 [inline]
 balance_pgdat mm/vmscan.c:6977 [inline]
 kswapd+0x25e8/0x42f0 mm/vmscan.c:7246
 kthread+0x3e2/0x540 kernel/kthread.c:389
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was stored to memory at:
 memcpy_from_iter lib/iov_iter.c:73 [inline]
 iterate_bvec include/linux/iov_iter.h:123 [inline]
 iterate_and_advance2 include/linux/iov_iter.h:304 [inline]
 iterate_and_advance include/linux/iov_iter.h:328 [inline]
 __copy_from_iter lib/iov_iter.c:249 [inline]
 copy_page_from_iter_atomic+0x1299/0x30c0 lib/iov_iter.c:483
 copy_folio_from_iter_atomic include/linux/uio.h:201 [inline]
 generic_perform_write+0x8d1/0x1080 mm/filemap.c:4067
 shmem_file_write_iter+0x2ba/0x2f0 mm/shmem.c:3295
 do_iter_readv_writev+0x88a/0xa30
 vfs_iter_write+0x44d/0xd40 fs/read_write.c:974
 lo_write_bvec drivers/block/loop.c:243 [inline]
 lo_write_simple drivers/block/loop.c:264 [inline]
 do_req_filebacked drivers/block/loop.c:511 [inline]
 loop_handle_cmd drivers/block/loop.c:1909 [inline]
 loop_process_work+0x15fb/0x3760 drivers/block/loop.c:1944
 loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1975
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310
 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391
 kthread+0x3e2/0x540 kernel/kthread.c:389
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was stored to memory at:
 ntfs_sb_write+0x600/0xbb0 fs/ntfs3/fsntfs.c:1097
 ntfs_sb_write_run+0x2cb/0x8d0 fs/ntfs3/fsntfs.c:1148
 al_update+0x2c3/0x4d0 fs/ntfs3/attrlist.c:406
 ni_write_inode+0x1af7/0x1df0 fs/ntfs3/frecord.c:3331
 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1016
 write_inode fs/fs-writeback.c:1525 [inline]
 __writeback_single_inode+0x8da/0x1290 fs/fs-writeback.c:1745
 writeback_sb_inodes+0xa34/0x1c20 fs/fs-writeback.c:1976
 __writeback_inodes_wb+0x14c/0x440 fs/fs-writeback.c:2047
 wb_writeback+0x50b/0xcb0 fs/fs-writeback.c:2158
 wb_check_background_flush fs/fs-writeback.c:2228 [inline]
 wb_do_writeback fs/fs-writeback.c:2316 [inline]
 wb_workfn+0x122c/0x1940 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310
 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391
 kthread+0x3e2/0x540 kernel/kthread.c:389
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4125 [inline]
 slab_alloc_node mm/slub.c:4168 [inline]
 __do_kmalloc_node mm/slub.c:4297 [inline]
 __kmalloc_noprof+0x923/0x1230 mm/slub.c:4310
 kmalloc_noprof include/linux/slab.h:905 [inline]
 ni_create_attr_list+0x1b8/0x19d0 fs/ntfs3/frecord.c:822
 ni_ins_attr_ext+0x4e6/0x10a0 fs/ntfs3/frecord.c:976
 ni_insert_attr+0x2af/0xf00 fs/ntfs3/frecord.c:1143
 ni_insert_nonresident+0x309/0x8a0 fs/ntfs3/frecord.c:1478
 indx_create_allocate fs/ntfs3/index.c:1452 [inline]
 indx_insert_into_root+0x256c/0x37d0 fs/ntfs3/index.c:1695
 indx_insert_entry+0xe1d/0xee0 fs/ntfs3/index.c:1982
 ntfs_create_inode+0x438d/0x4e40 fs/ntfs3/inode.c:1653
 ntfs_mkdir+0x56/0x70 fs/ntfs3/namei.c:207
 vfs_mkdir+0x4a0/0x780 fs/namei.c:4311
 do_mkdirat+0x529/0x820 fs/namei.c:4334
 __do_sys_mkdir fs/namei.c:4354 [inline]
 __se_sys_mkdir fs/namei.c:4352 [inline]
 __ia32_sys_mkdir+0x9f/0xe0 fs/namei.c:4352
 ia32_sys_call+0x1f39/0x4180 arch/x86/include/generated/asm/syscalls_32.h:40
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 0 UID: 0 PID: 81 Comm: kswapd0 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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