===================================================== BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x1909/0x2510 lib/lzo/lzo1x_compress.c:168 lzo1x_1_do_compress+0x1909/0x2510 lib/lzo/lzo1x_compress.c:168 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_frontswap_store+0x178f/0x2d90 mm/zswap.c:1260 __frontswap_store+0x25a/0x4d0 mm/frontswap.c:186 frontswap_store include/linux/frontswap.h:66 [inline] swap_writepage+0x1d3/0x3d0 mm/page_io.c:201 shmem_writepage+0x1c7a/0x2450 mm/shmem.c:1442 pageout mm/vmscan.c:1365 [inline] shrink_folio_list+0x52c8/0x74c0 mm/vmscan.c:2024 evict_folios+0x8763/0xa6d0 mm/vmscan.c:5158 try_to_shrink_lruvec+0x16c2/0x1be0 mm/vmscan.c:5334 shrink_one+0x479/0xcd0 mm/vmscan.c:5378 shrink_many mm/vmscan.c:5430 [inline] lru_gen_shrink_node mm/vmscan.c:5547 [inline] shrink_node+0x48ea/0x56e0 mm/vmscan.c:6488 kswapd_shrink_node mm/vmscan.c:7288 [inline] balance_pgdat+0x12fa/0x31f0 mm/vmscan.c:7478 kswapd+0x91d/0xf10 mm/vmscan.c:7738 kthread+0x3e8/0x540 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 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_frontswap_store+0x178f/0x2d90 mm/zswap.c:1260 __frontswap_store+0x25a/0x4d0 mm/frontswap.c:186 frontswap_store include/linux/frontswap.h:66 [inline] swap_writepage+0x1d3/0x3d0 mm/page_io.c:201 shmem_writepage+0x1c7a/0x2450 mm/shmem.c:1442 pageout mm/vmscan.c:1365 [inline] shrink_folio_list+0x52c8/0x74c0 mm/vmscan.c:2024 evict_folios+0x8763/0xa6d0 mm/vmscan.c:5158 try_to_shrink_lruvec+0x16c2/0x1be0 mm/vmscan.c:5334 shrink_one+0x479/0xcd0 mm/vmscan.c:5378 shrink_many mm/vmscan.c:5430 [inline] lru_gen_shrink_node mm/vmscan.c:5547 [inline] shrink_node+0x48ea/0x56e0 mm/vmscan.c:6488 kswapd_shrink_node mm/vmscan.c:7288 [inline] balance_pgdat+0x12fa/0x31f0 mm/vmscan.c:7478 kswapd+0x91d/0xf10 mm/vmscan.c:7738 kthread+0x3e8/0x540 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:639 [inline] copy_page_from_iter_atomic+0x1271/0x26d0 lib/iov_iter.c:872 generic_perform_write+0x4a2/0xbb0 mm/filemap.c:3937 __generic_file_write_iter+0x393/0x920 mm/filemap.c:4057 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4089 do_iter_write+0x605/0x1310 fs/read_write.c:860 vfs_iter_write+0x88/0xe0 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:1888 [inline] loop_process_work+0x206d/0x3990 drivers/block/loop.c:1923 loop_workfn+0x48/0x60 drivers/block/loop.c:1947 process_one_work+0xb0d/0x1410 kernel/workqueue.c:2405 worker_thread+0x107e/0x1d60 kernel/workqueue.c:2552 kthread+0x3e8/0x540 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Uninit was stored to memory at: lmWriteRecord+0xee3/0x17a0 fs/jfs/jfs_logmgr.c:473 lmLogInit+0x1c47/0x25f0 fs/jfs/jfs_logmgr.c:1367 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0xa3d/0x2170 fs/jfs/jfs_logmgr.c:1069 jfs_mount_rw+0xf2/0x9f0 fs/jfs/jfs_mount.c:257 jfs_fill_super+0x77f/0x1310 fs/jfs/super.c:565 mount_bdev+0x4e1/0x7f0 fs/super.c:1380 jfs_do_mount+0x4d/0x60 fs/jfs/super.c:670 legacy_get_tree+0x110/0x290 fs/fs_context.c:610 vfs_get_tree+0xa5/0x500 fs/super.c:1510 do_new_mount+0x68d/0x1540 fs/namespace.c:3039 path_mount+0x725/0x1ee0 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3568 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3568 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Local variable lrd created at: lmLogInit+0x41/0x25f0 fs/jfs/jfs_logmgr.c:1243 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0xa3d/0x2170 fs/jfs/jfs_logmgr.c:1069 CPU: 1 PID: 80 Comm: kswapd0 Not tainted 6.4.0-rc7-syzkaller-ge6bc8833d80f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 =====================================================