=====================================================
BUG: KMSAN: uninit-value in sw842_compress+0x22f7/0x4fa0 lib/842/842_compress.c:542
 sw842_compress+0x22f7/0x4fa0 lib/842/842_compress.c:542
 crypto842_scompress+0x4e/0x70 crypto/842.c:46
 scomp_acomp_comp_decomp+0xa49/0x1120 include/crypto/internal/scompress.h:-1
 scomp_acomp_compress+0x33/0x40 crypto/scompress.c:282
 crypto_acomp_compress+0x5b4/0xe80 crypto/acompress.c:291
 zswap_compress mm/zswap.c:977 [inline]
 zswap_store_page mm/zswap.c:1492 [inline]
 zswap_store+0x21db/0x44f0 mm/zswap.c:1601
 swap_writeout+0x8c0/0x1370 mm/page_io.c:275
 shmem_writeout+0x1ac6/0x1f70 mm/shmem.c:1680
 writeout mm/vmscan.c:667 [inline]
 pageout mm/vmscan.c:728 [inline]
 shrink_folio_list+0x56c9/0x7e30 mm/vmscan.c:1452
 evict_folios+0x9acf/0xbfe0 mm/vmscan.c:4744
 try_to_shrink_lruvec+0x12b6/0x17e0 mm/vmscan.c:4907
 lru_gen_shrink_lruvec mm/vmscan.c:5056 [inline]
 shrink_lruvec+0x46f/0x4f10 mm/vmscan.c:5815
 shrink_node_memcgs mm/vmscan.c:6051 [inline]
 shrink_node+0x1113/0x54a0 mm/vmscan.c:6092
 shrink_zones mm/vmscan.c:6336 [inline]
 do_try_to_free_pages+0x849/0x26b0 mm/vmscan.c:6398
 try_to_free_mem_cgroup_pages+0x3ae/0x950 mm/vmscan.c:6726
 try_charge_memcg+0x810/0x1bf0 mm/memcontrol.c:2357
 try_charge mm/memcontrol.c:2499 [inline]
 charge_memcg+0xd8/0x2b0 mm/memcontrol.c:4702
 __mem_cgroup_charge+0x71/0x2e0 mm/memcontrol.c:4719
 mem_cgroup_charge include/linux/memcontrol.h:654 [inline]
 filemap_add_folio+0x82/0x310 mm/filemap.c:964
 filemap_create_folio mm/filemap.c:2541 [inline]
 filemap_get_pages+0x13b1/0x3a60 mm/filemap.c:2609
 filemap_splice_read+0x8b5/0x1410 mm/filemap.c:2991
 do_splice_read fs/splice.c:982 [inline]
 splice_direct_to_actor+0x651/0x1550 fs/splice.c:1086
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x1e0/0x350 fs/splice.c:1230
 do_sendfile+0x9eb/0x1110 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64+0x1e3/0x280 fs/read_write.c:1417
 __x64_sys_sendfile64+0xbd/0x120 fs/read_write.c:1417
 x64_sys_call+0x36b8/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:41
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

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:306 [inline]
 iterate_and_advance include/linux/iov_iter.h:330 [inline]
 __copy_from_iter lib/iov_iter.c:249 [inline]
 copy_folio_from_iter_atomic+0x11f7/0x3c20 lib/iov_iter.c:479
 generic_perform_write+0x8b1/0x1050 mm/filemap.c:4193
 shmem_file_write_iter+0x2b7/0x2f0 mm/shmem.c:3528
 lo_rw_aio+0x1265/0x1590 drivers/block/loop.c:-1
 do_req_filebacked drivers/block/loop.c:-1 [inline]
 loop_handle_cmd drivers/block/loop.c:1913 [inline]
 loop_process_work+0xe30/0x1ec0 drivers/block/loop.c:1948
 loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1979
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xb8e/0x1d80 kernel/workqueue.c:3319
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400
 kthread+0xd59/0xf00 kernel/kthread.c:463
 ret_from_fork+0x1e3/0x310 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was stored to memory at:
 lmWriteRecord+0x135c/0x1e40 fs/jfs/jfs_logmgr.c:473
 lmLogInit+0x2012/0x27a0 fs/jfs/jfs_logmgr.c:1367
 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline]
 lmLogOpen+0xaef/0x21a0 fs/jfs/jfs_logmgr.c:1069
 jfs_mount_rw+0xdf/0x9f0 fs/jfs/jfs_mount.c:257
 jfs_fill_super+0xabf/0x18f0 fs/jfs/super.c:532
 get_tree_bdev_flags+0x6e3/0x920 fs/super.c:1692
 get_tree_bdev+0x38/0x50 fs/super.c:1715
 jfs_get_tree+0x35/0x40 fs/jfs/super.c:635
 vfs_get_tree+0xb0/0x5c0 fs/super.c:1815
 do_new_mount+0x733/0x1420 fs/namespace.c:3808
 path_mount+0x6db/0x1e90 fs/namespace.c:4123
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x6eb/0x7d0 fs/namespace.c:4324
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4324
 x64_sys_call+0x3604/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable lrd created at:
 lmLogInit+0x41/0x27a0 fs/jfs/jfs_logmgr.c:1243
 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline]
 lmLogOpen+0xaef/0x21a0 fs/jfs/jfs_logmgr.c:1069

CPU: 0 UID: 0 PID: 26745 Comm: syz.8.5167 Tainted: G        W           syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
=====================================================