=====================================================
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: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:
 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: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:
 lmWriteRecord+0xf4c/0x1870 fs/jfs/jfs_logmgr.c:473
 lmLogInit+0x1c4c/0x25f0 fs/jfs/jfs_logmgr.c:1367
 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline]
 lmLogOpen+0xc05/0x20a0 fs/jfs/jfs_logmgr.c:1069
 jfs_mount_rw+0xf2/0x9f0 fs/jfs/jfs_mount.c:257
 jfs_fill_super+0x77e/0x1310 fs/jfs/super.c:565
 mount_bdev+0x39a/0x520 fs/super.c:1679
 jfs_do_mount+0x4d/0x60 fs/jfs/super.c:670
 legacy_get_tree+0x114/0x290 fs/fs_context.c:662
 vfs_get_tree+0xb1/0x5a0 fs/super.c:1800
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3507
 path_mount+0x742/0x1f10 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x722/0x810 fs/namespace.c:4032
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4032
 x64_sys_call+0x255a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:166
 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

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+0xc05/0x20a0 fs/jfs/jfs_logmgr.c:1069

CPU: 1 UID: 0 PID: 80 Comm: kswapd0 Tainted: G        W          6.12.0-rc1-syzkaller-00330-gfc20a3e57247 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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