===================================================== BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107 lzo1x_1_do_compress+0x913/0x2510 lib/lzo/lzo1x_compress.c:107 lzogeneric1x_1_compress+0x26a/0x11a0 lib/lzo/lzo1x_compress.c:333 lzo1x_1_compress+0x47/0x70 lib/lzo/lzo1x_compress.c:383 __lzo_compress crypto/lzo.c:58 [inline] lzo_scompress+0x98/0x180 crypto/lzo.c:79 scomp_acomp_comp_decomp+0x4b6/0x780 scomp_acomp_compress+0x32/0x40 crypto/scompress.c:159 crypto_acomp_compress include/crypto/acompress.h:302 [inline] zswap_store+0x1b5c/0x32b0 mm/zswap.c:1314 swap_writepage+0x122/0x340 mm/page_io.c:198 shmem_writepage+0x1720/0x1e70 mm/shmem.c:1500 pageout mm/vmscan.c:654 [inline] shrink_folio_list+0x508f/0x7760 mm/vmscan.c:1315 evict_folios+0x9b33/0xb940 mm/vmscan.c:4499 try_to_shrink_lruvec+0x16c2/0x1be0 mm/vmscan.c:4678 shrink_one+0x479/0xcd0 mm/vmscan.c:4722 shrink_many mm/vmscan.c:4776 [inline] lru_gen_shrink_node mm/vmscan.c:4893 [inline] shrink_node+0x4af0/0x58f0 mm/vmscan.c:5833 kswapd_shrink_node mm/vmscan.c:6638 [inline] balance_pgdat mm/vmscan.c:6828 [inline] kswapd+0x1df1/0x4260 mm/vmscan.c:7088 kthread+0x3ed/0x540 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Uninit was stored to memory at: memcpy_dir crypto/scatterwalk.c:23 [inline] scatterwalk_copychunks crypto/scatterwalk.c:38 [inline] scatterwalk_map_and_copy+0x6dc/0x9a0 crypto/scatterwalk.c:67 scomp_acomp_comp_decomp+0x376/0x780 crypto/scompress.c:134 scomp_acomp_compress+0x32/0x40 crypto/scompress.c:159 crypto_acomp_compress include/crypto/acompress.h:302 [inline] zswap_store+0x1b5c/0x32b0 mm/zswap.c:1314 swap_writepage+0x122/0x340 mm/page_io.c:198 shmem_writepage+0x1720/0x1e70 mm/shmem.c:1500 pageout mm/vmscan.c:654 [inline] shrink_folio_list+0x508f/0x7760 mm/vmscan.c:1315 evict_folios+0x9b33/0xb940 mm/vmscan.c:4499 try_to_shrink_lruvec+0x16c2/0x1be0 mm/vmscan.c:4678 shrink_one+0x479/0xcd0 mm/vmscan.c:4722 shrink_many mm/vmscan.c:4776 [inline] lru_gen_shrink_node mm/vmscan.c:4893 [inline] shrink_node+0x4af0/0x58f0 mm/vmscan.c:5833 kswapd_shrink_node mm/vmscan.c:6638 [inline] balance_pgdat mm/vmscan.c:6828 [inline] kswapd+0x1df1/0x4260 mm/vmscan.c:7088 kthread+0x3ed/0x540 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:73 [inline] iterate_bvec include/linux/iov_iter.h:122 [inline] iterate_and_advance2 include/linux/iov_iter.h:249 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] __copy_from_iter lib/iov_iter.c:268 [inline] copy_page_from_iter_atomic+0x12f1/0x2b70 lib/iov_iter.c:500 generic_perform_write+0x4ae/0xc40 mm/filemap.c:3926 shmem_file_write_iter+0x2b5/0x2e0 mm/shmem.c:2878 do_iter_write+0xceb/0x1340 fs/read_write.c:860 vfs_iter_write+0x8e/0xe0 fs/read_write.c:901 lo_write_bvec drivers/block/loop.c:249 [inline] lo_write_simple drivers/block/loop.c:271 [inline] do_req_filebacked drivers/block/loop.c:495 [inline] loop_handle_cmd drivers/block/loop.c:1915 [inline] loop_process_work+0x20c3/0x39d0 drivers/block/loop.c:1950 loop_workfn+0x48/0x60 drivers/block/loop.c:1974 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2703 worker_thread+0xf45/0x1490 kernel/workqueue.c:2784 kthread+0x3ed/0x540 kernel/kthread.c:388 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Uninit was created at: __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4591 alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133 alloc_pages mm/mempolicy.c:2204 [inline] folio_alloc+0x1da/0x380 mm/mempolicy.c:2211 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:974 __filemap_get_folio+0xa5a/0x1760 mm/filemap.c:1918 grow_dev_page fs/buffer.c:1041 [inline] grow_buffers fs/buffer.c:1106 [inline] __getblk_slow fs/buffer.c:1133 [inline] bdev_getblk+0x3e5/0x1790 fs/buffer.c:1429 __getblk include/linux/buffer_head.h:358 [inline] sb_getblk include/linux/buffer_head.h:364 [inline] get_empty_nodes+0x99c/0xd90 fs/reiserfs/fix_node.c:890 fix_nodes+0xb80a/0x13ca0 fs/reiserfs/fix_node.c:2663 reiserfs_insert_item+0xa59/0xe60 fs/reiserfs/stree.c:2239 indirect2direct+0x7f2/0xac0 fs/reiserfs/tail_conversion.c:283 maybe_indirect_to_direct fs/reiserfs/stree.c:1585 [inline] reiserfs_cut_from_item+0x131e/0x3020 fs/reiserfs/stree.c:1692 reiserfs_do_truncate+0xf2f/0x1710 fs/reiserfs/stree.c:1971 reiserfs_truncate_file+0x9a4/0x1b70 fs/reiserfs/inode.c:2302 reiserfs_truncate_failed_write fs/reiserfs/inode.c:2735 [inline] reiserfs_write_end+0xf87/0x1570 fs/reiserfs/inode.c:2951 generic_perform_write+0x5be/0xc40 mm/filemap.c:3929 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4013 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4039 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __ia32_sys_write+0x91/0xd0 fs/read_write.c:646 do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:230 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:255 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:293 entry_SYSENTER_compat_after_hwframe+0x70/0x7a CPU: 0 PID: 77 Comm: kswapd0 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 =====================================================