===================================================== BUG: KMSAN: uninit-value in process_next lib/842/842_compress.c:456 [inline] BUG: KMSAN: uninit-value in sw842_compress+0x1767/0x5990 lib/842/842_compress.c:543 process_next lib/842/842_compress.c:456 [inline] sw842_compress+0x1767/0x5990 lib/842/842_compress.c:543 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:918 [inline] zswap_store+0x1cea/0x3650 mm/zswap.c:1460 swap_writepage+0xa4f/0x12b0 mm/page_io.c:271 shmem_writepage+0x2117/0x2450 mm/shmem.c:1567 pageout mm/vmscan.c:688 [inline] shrink_folio_list+0x5e78/0x7dd0 mm/vmscan.c:1366 evict_folios+0x9813/0xbaf0 mm/vmscan.c:4583 try_to_shrink_lruvec+0x13a3/0x1750 mm/vmscan.c:4778 shrink_one+0x646/0xd20 mm/vmscan.c:4816 shrink_many mm/vmscan.c:4879 [inline] lru_gen_shrink_node mm/vmscan.c:4957 [inline] shrink_node+0x451b/0x5170 mm/vmscan.c:5937 kswapd_shrink_node mm/vmscan.c:6765 [inline] balance_pgdat mm/vmscan.c:6957 [inline] kswapd+0x25e2/0x42f0 mm/vmscan.c:7226 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: get_next_data lib/842/842_compress.c:412 [inline] sw842_compress+0xdfc/0x5990 lib/842/842_compress.c:522 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:918 [inline] zswap_store+0x1cea/0x3650 mm/zswap.c:1460 swap_writepage+0xa4f/0x12b0 mm/page_io.c:271 shmem_writepage+0x2117/0x2450 mm/shmem.c:1567 pageout mm/vmscan.c:688 [inline] shrink_folio_list+0x5e78/0x7dd0 mm/vmscan.c:1366 evict_folios+0x9813/0xbaf0 mm/vmscan.c:4583 try_to_shrink_lruvec+0x13a3/0x1750 mm/vmscan.c:4778 shrink_one+0x646/0xd20 mm/vmscan.c:4816 shrink_many mm/vmscan.c:4879 [inline] lru_gen_shrink_node mm/vmscan.c:4957 [inline] shrink_node+0x451b/0x5170 mm/vmscan.c:5937 kswapd_shrink_node mm/vmscan.c:6765 [inline] balance_pgdat mm/vmscan.c:6957 [inline] kswapd+0x25e2/0x42f0 mm/vmscan.c:7226 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:481 copy_folio_from_iter_atomic include/linux/uio.h:201 [inline] generic_perform_write+0x8d1/0x1080 mm/filemap.c:4066 shmem_file_write_iter+0x2ba/0x2f0 mm/shmem.c:3216 do_iter_readv_writev+0x88a/0xa30 vfs_iter_write+0x44d/0xd40 fs/read_write.c:988 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:1910 [inline] loop_process_work+0x15e6/0x3750 drivers/block/loop.c:1945 loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1976 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_write_bh+0x652/0xdb0 fs/ntfs3/fsntfs.c:1450 mi_write+0xda/0x2d0 fs/ntfs3/record.c:387 ni_write_inode+0xd80/0x1de0 fs/ntfs3/frecord.c:3437 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1016 write_inode fs/fs-writeback.c:1503 [inline] __writeback_single_inode+0x8da/0x1290 fs/fs-writeback.c:1723 writeback_sb_inodes+0xa34/0x1c20 fs/fs-writeback.c:1954 __writeback_inodes_wb+0x14c/0x440 fs/fs-writeback.c:2025 wb_writeback+0x50b/0xcb0 fs/fs-writeback.c:2136 wb_check_old_data_flush fs/fs-writeback.c:2240 [inline] wb_do_writeback fs/fs-writeback.c:2293 [inline] wb_workfn+0x110c/0x1940 fs/fs-writeback.c:2321 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: hdr_insert_de fs/ntfs3/index.c:838 [inline] indx_insert_into_root+0x199b/0x37d0 fs/ntfs3/index.c:1619 indx_insert_entry+0xe1d/0xee0 fs/ntfs3/index.c:1982 ntfs_create_inode+0x438d/0x4e50 fs/ntfs3/inode.c:1653 ntfs_create+0x56/0x70 fs/ntfs3/namei.c:110 lookup_open fs/namei.c:3595 [inline] open_last_lookups fs/namei.c:3694 [inline] path_openat+0x2e9e/0x6200 fs/namei.c:3930 do_filp_open+0x20e/0x590 fs/namei.c:3960 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_compat_sys_openat fs/open.c:1492 [inline] __se_compat_sys_openat fs/open.c:1490 [inline] __ia32_compat_sys_openat+0x298/0x300 fs/open.c:1490 ia32_sys_call+0x2363/0x40d0 arch/x86/include/generated/asm/syscalls_32.h:296 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 Uninit was created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_noprof+0x637/0xb20 mm/slub.c:4141 ntfs_create_inode+0x5f5/0x4e50 fs/ntfs3/inode.c:1290 ntfs_create+0x56/0x70 fs/ntfs3/namei.c:110 lookup_open fs/namei.c:3595 [inline] open_last_lookups fs/namei.c:3694 [inline] path_openat+0x2e9e/0x6200 fs/namei.c:3930 do_filp_open+0x20e/0x590 fs/namei.c:3960 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_compat_sys_openat fs/open.c:1492 [inline] __se_compat_sys_openat fs/open.c:1490 [inline] __ia32_compat_sys_openat+0x298/0x300 fs/open.c:1490 ia32_sys_call+0x2363/0x40d0 arch/x86/include/generated/asm/syscalls_32.h:296 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: 1 UID: 0 PID: 79 Comm: kswapd0 Tainted: G W 6.12.0-rc4-syzkaller-00245-gb423f5a9a61f #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 =====================================================