Free swap = 118284kB Total swap = 124996kB 2097051 pages RAM 0 pages HighMem/MovableOnly 1530437 pages reserved 0 pages cma reserved ===================================================== BUG: KMSAN: uninit-value in check_template lib/842/842_compress.c:393 [inline] BUG: KMSAN: uninit-value in process_next lib/842/842_compress.c:456 [inline] BUG: KMSAN: uninit-value in sw842_compress+0x1584/0x4fa0 lib/842/842_compress.c:545 check_template lib/842/842_compress.c:393 [inline] process_next lib/842/842_compress.c:456 [inline] sw842_compress+0x1584/0x4fa0 lib/842/842_compress.c:545 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:886 [inline] zswap_store_page mm/zswap.c:1428 [inline] zswap_store+0x1e0b/0x4a90 mm/zswap.c:1539 swap_writeout+0x8c1/0x1390 mm/page_io.c:275 shmem_writeout+0x1abb/0x1f60 mm/shmem.c:1662 writeout mm/vmscan.c:649 [inline] pageout mm/vmscan.c:698 [inline] shrink_folio_list+0x5920/0x7fc0 mm/vmscan.c:1418 evict_folios+0x999d/0xbf30 mm/vmscan.c:4711 try_to_shrink_lruvec+0x12b6/0x17e0 mm/vmscan.c:4874 shrink_one+0x43c/0xbd0 mm/vmscan.c:4919 shrink_many mm/vmscan.c:4982 [inline] lru_gen_shrink_node mm/vmscan.c:5060 [inline] shrink_node+0x453a/0x51e0 mm/vmscan.c:6047 kswapd_shrink_node mm/vmscan.c:6901 [inline] balance_pgdat mm/vmscan.c:7084 [inline] kswapd+0x2b89/0x4d30 mm/vmscan.c:7354 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x208/0x710 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Uninit was stored to memory at: get_next_data lib/842/842_compress.c:412 [inline] sw842_compress+0xc8b/0x4fa0 lib/842/842_compress.c:522 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:886 [inline] zswap_store_page mm/zswap.c:1428 [inline] zswap_store+0x1e0b/0x4a90 mm/zswap.c:1539 swap_writeout+0x8c1/0x1390 mm/page_io.c:275 shmem_writeout+0x1abb/0x1f60 mm/shmem.c:1662 writeout mm/vmscan.c:649 [inline] pageout mm/vmscan.c:698 [inline] shrink_folio_list+0x5920/0x7fc0 mm/vmscan.c:1418 evict_folios+0x999d/0xbf30 mm/vmscan.c:4711 try_to_shrink_lruvec+0x12b6/0x17e0 mm/vmscan.c:4874 shrink_one+0x43c/0xbd0 mm/vmscan.c:4919 shrink_many mm/vmscan.c:4982 [inline] lru_gen_shrink_node mm/vmscan.c:5060 [inline] shrink_node+0x453a/0x51e0 mm/vmscan.c:6047 kswapd_shrink_node mm/vmscan.c:6901 [inline] balance_pgdat mm/vmscan.c:7084 [inline] kswapd+0x2b89/0x4d30 mm/vmscan.c:7354 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x208/0x710 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:85 [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:261 [inline] copy_folio_from_iter_atomic+0xe9b/0x3900 lib/iov_iter.c:491 generic_perform_write+0x8b1/0x1050 mm/filemap.c:4332 shmem_file_write_iter+0x2b7/0x2f0 mm/shmem.c:3490 lo_rw_aio+0x11de/0x1520 drivers/block/loop.c:-1 do_req_filebacked drivers/block/loop.c:-1 [inline] loop_handle_cmd drivers/block/loop.c:1926 [inline] loop_process_work+0xf14/0x2020 drivers/block/loop.c:1961 loop_workfn+0x3e/0x60 drivers/block/loop.c:1985 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3340 worker_thread+0xedf/0x1590 kernel/workqueue.c:3421 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x208/0x710 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Uninit was stored to memory at: lmWriteRecord+0x135c/0x1e40 fs/jfs/jfs_logmgr.c:473 lmLogInit+0x2004/0x27a0 fs/jfs/jfs_logmgr.c:1366 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0xaef/0x2160 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+0x6e6/0x920 fs/super.c:1691 get_tree_bdev+0x38/0x50 fs/super.c:1714 jfs_get_tree+0x35/0x40 fs/jfs/super.c:635 vfs_get_tree+0xb3/0x5c0 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount+0x879/0x1700 fs/namespace.c:3712 path_mount+0x749/0x1fb0 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount+0x6f7/0x7e0 fs/namespace.c:4201 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4201 x64_sys_call+0x38cb/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd3/0xf80 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:1242 open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline] lmLogOpen+0xaef/0x2160 fs/jfs/jfs_logmgr.c:1069 CPU: 1 UID: 0 PID: 87 Comm: kswapd1 Tainted: G W L syzkaller #0 PREEMPT(none) Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 =====================================================