===================================================== 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:919 [inline] zswap_store+0x1cea/0x3650 mm/zswap.c:1461 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+0x451a/0x50f0 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+0x12b7/0x3100 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:3221 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_workfn+0x48/0x60 drivers/block/loop.c:1969 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:388 ni_write_inode+0xd80/0x1de0 fs/ntfs3/frecord.c:3440 ntfs_sync_inode+0x39/0x50 fs/ntfs3/inode.c:1016 ntfs_truncate fs/ntfs3/file.c:472 [inline] ntfs3_setattr+0x1171/0x1550 fs/ntfs3/file.c:774 notify_change+0x1a8e/0x1b80 fs/attr.c:503 do_truncate+0x22a/0x2b0 fs/open.c:65 handle_truncate fs/namei.c:3395 [inline] do_open fs/namei.c:3778 [inline] path_openat+0x5c3c/0x6200 fs/namei.c:3933 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_sys_creat fs/open.c:1506 [inline] __se_sys_creat fs/open.c:1500 [inline] __x64_sys_creat+0xe6/0x140 fs/open.c:1500 x64_sys_call+0x3a6c/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:86 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 Uninit was stored to memory at: al_update+0x388/0x4d0 fs/ntfs3/attrlist.c:457 ni_write_inode+0x1aea/0x1de0 fs/ntfs3/frecord.c:3408 ntfs_sync_inode+0x39/0x50 fs/ntfs3/inode.c:1016 ntfs_truncate fs/ntfs3/file.c:472 [inline] ntfs3_setattr+0x1171/0x1550 fs/ntfs3/file.c:774 notify_change+0x1a8e/0x1b80 fs/attr.c:503 do_truncate+0x22a/0x2b0 fs/open.c:65 handle_truncate fs/namei.c:3395 [inline] do_open fs/namei.c:3778 [inline] path_openat+0x5c3c/0x6200 fs/namei.c:3933 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_sys_creat fs/open.c:1506 [inline] __se_sys_creat fs/open.c:1500 [inline] __x64_sys_creat+0xe6/0x140 fs/open.c:1500 x64_sys_call+0x3a6c/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:86 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 Uninit was created at: slab_post_alloc_hook mm/slub.c:4092 [inline] slab_alloc_node mm/slub.c:4135 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x661/0xf30 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] ni_create_attr_list+0x1b8/0x19d0 fs/ntfs3/frecord.c:820 ni_ins_attr_ext+0x4e6/0x10a0 fs/ntfs3/frecord.c:974 ni_insert_attr fs/ntfs3/frecord.c:1141 [inline] ni_insert_resident fs/ntfs3/frecord.c:1525 [inline] ni_add_name+0xaf1/0x10d0 fs/ntfs3/frecord.c:3115 ntfs_link_inode+0x265/0x310 fs/ntfs3/inode.c:1727 ntfs_link+0x21d/0x500 fs/ntfs3/namei.c:146 vfs_link+0x94c/0xb70 fs/namei.c:4739 do_linkat+0x4f5/0xfd0 fs/namei.c:4809 __do_sys_link fs/namei.c:4843 [inline] __se_sys_link fs/namei.c:4841 [inline] __x64_sys_link+0xe8/0x140 fs/namei.c:4841 x64_sys_call+0x2853/0x3ba0 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: 1 UID: 0 PID: 81 Comm: kswapd0 Tainted: G W 6.11.0-syzkaller-11728-gad46e8f95e93 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 =====================================================