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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:962 [inline]
 zswap_store_page mm/zswap.c:1462 [inline]
 zswap_store+0x20c9/0x48b0 mm/zswap.c:1571
 swap_writepage+0xa67/0x1950 mm/page_io.c:278
 shmem_writepage+0x2348/0x2590 mm/shmem.c:1647
 pageout mm/vmscan.c:696 [inline]
 shrink_folio_list+0x5dd2/0x8220 mm/vmscan.c:1402
 evict_folios+0x94ed/0xb9c0 mm/vmscan.c:4660
 try_to_shrink_lruvec+0xc58/0x1080 mm/vmscan.c:4821
 shrink_one+0x646/0xd20 mm/vmscan.c:4866
 shrink_many mm/vmscan.c:4929 [inline]
 lru_gen_shrink_node mm/vmscan.c:5007 [inline]
 shrink_node+0x4578/0x51c0 mm/vmscan.c:5978
 kswapd_shrink_node mm/vmscan.c:6807 [inline]
 balance_pgdat mm/vmscan.c:6999 [inline]
 kswapd+0x2c3c/0x4960 mm/vmscan.c:7264
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 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+0x1314/0x3450 lib/iov_iter.c:483
 copy_folio_from_iter_atomic include/linux/uio.h:210 [inline]
 generic_perform_write+0x8d1/0x1080 mm/filemap.c:4200
 shmem_file_write_iter+0x2ba/0x2f0 mm/shmem.c:3477
 do_iter_readv_writev+0x93a/0xbc0
 vfs_iter_write+0x44d/0xd60 fs/read_write.c:974
 lo_write_bvec drivers/block/loop.c:245 [inline]
 lo_write_simple drivers/block/loop.c:266 [inline]
 do_req_filebacked drivers/block/loop.c:520 [inline]
 loop_handle_cmd drivers/block/loop.c:1929 [inline]
 loop_process_work+0x15fb/0x3760 drivers/block/loop.c:1964
 loop_workfn+0x48/0x60 drivers/block/loop.c:1988
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xc1a/0x1e80 kernel/workqueue.c:3319
 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3400
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was stored to memory at:
 ntfs_sb_write+0x68b/0xca0 fs/ntfs3/fsntfs.c:1101
 ntfs_sb_write_run+0x2cb/0x8d0 fs/ntfs3/fsntfs.c:1152
 al_update+0x2d3/0x570 fs/ntfs3/attrlist.c:406
 ni_write_inode+0x1afa/0x1df0 fs/ntfs3/frecord.c:3337
 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1019
 write_inode fs/fs-writeback.c:1525 [inline]
 __writeback_single_inode+0x8da/0x1290 fs/fs-writeback.c:1745
 writeback_sb_inodes+0xac4/0x1c90 fs/fs-writeback.c:1976
 wb_writeback+0x4df/0xcb0 fs/fs-writeback.c:2156
 wb_do_writeback fs/fs-writeback.c:2303 [inline]
 wb_workfn+0x40b/0x1940 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xc1a/0x1e80 kernel/workqueue.c:3319
 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3400
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4121 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_noprof+0x923/0x1230 mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 ni_create_attr_list+0x1d5/0x1d20 fs/ntfs3/frecord.c:827
 ni_ins_attr_ext+0x68f/0x1310 fs/ntfs3/frecord.c:981
 ni_insert_attr fs/ntfs3/frecord.c:1148 [inline]
 ni_insert_resident fs/ntfs3/frecord.c:1532 [inline]
 ni_add_name+0xb16/0x1140 fs/ntfs3/frecord.c:3044
 ntfs_link_inode+0x265/0x310 fs/ntfs3/inode.c:1738
 ntfs_link+0x21d/0x500 fs/ntfs3/namei.c:146
 vfs_link+0x94c/0xb70 fs/namei.c:4795
 do_linkat+0x4f5/0xff0 fs/namei.c:4865
 __do_sys_link fs/namei.c:4899 [inline]
 __se_sys_link fs/namei.c:4897 [inline]
 __x64_sys_link+0xe8/0x140 fs/namei.c:4897
 x64_sys_call+0x3afa/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:87
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 80 Comm: kswapd0 Not tainted 6.14.0-rc6-syzkaller-00022-gb7f94fcf5546 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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