===================================================== 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 lru_gen_shrink_lruvec mm/vmscan.c:5023 [inline] shrink_lruvec+0x46f/0x4f10 mm/vmscan.c:5784 shrink_node_memcgs mm/vmscan.c:6020 [inline] shrink_node+0xf1e/0x51e0 mm/vmscan.c:6061 shrink_zones mm/vmscan.c:6300 [inline] do_try_to_free_pages+0x849/0x26b0 mm/vmscan.c:6362 try_to_free_mem_cgroup_pages+0x3ae/0x950 mm/vmscan.c:6690 try_charge_memcg+0x80f/0x1c50 mm/memcontrol.c:2388 obj_cgroup_charge_pages+0x2ed/0x600 mm/memcontrol.c:2823 __memcg_kmem_charge_page+0x14a/0x4c0 mm/memcontrol.c:2867 __alloc_frozen_pages_noprof+0x3ba/0xab0 mm/page_alloc.c:5227 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0x102/0x280 mm/mempolicy.c:2577 vm_area_alloc_pages mm/vmalloc.c:3718 [inline] __vmalloc_area_node mm/vmalloc.c:3863 [inline] __vmalloc_node_range_noprof+0x1577/0x2d90 mm/vmalloc.c:4051 __vmalloc_node_noprof mm/vmalloc.c:4111 [inline] __vmalloc_noprof+0x128/0x1f0 mm/vmalloc.c:4127 do_replace+0x467/0x8c0 net/bridge/netfilter/ebtables.c:1135 do_ebt_set_ctl+0x24f/0x2230 net/bridge/netfilter/ebtables.c:2527 nf_setsockopt+0x4fb/0x550 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x1f2/0x210 net/ipv4/ip_sockglue.c:1424 sock_common_setsockopt+0xf5/0x140 net/core/sock.c:3972 do_sock_setsockopt net/socket.c:2322 [inline] __sys_setsockopt+0x43e/0x580 net/socket.c:2347 __do_sys_setsockopt net/socket.c:2353 [inline] __se_sys_setsockopt net/socket.c:2350 [inline] __x64_sys_setsockopt+0xf4/0x1a0 net/socket.c:2350 x64_sys_call+0x28e3/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:55 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 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 lru_gen_shrink_lruvec mm/vmscan.c:5023 [inline] shrink_lruvec+0x46f/0x4f10 mm/vmscan.c:5784 shrink_node_memcgs mm/vmscan.c:6020 [inline] shrink_node+0xf1e/0x51e0 mm/vmscan.c:6061 shrink_zones mm/vmscan.c:6300 [inline] do_try_to_free_pages+0x849/0x26b0 mm/vmscan.c:6362 try_to_free_mem_cgroup_pages+0x3ae/0x950 mm/vmscan.c:6690 try_charge_memcg+0x80f/0x1c50 mm/memcontrol.c:2388 obj_cgroup_charge_pages+0x2ed/0x600 mm/memcontrol.c:2823 __memcg_kmem_charge_page+0x14a/0x4c0 mm/memcontrol.c:2867 __alloc_frozen_pages_noprof+0x3ba/0xab0 mm/page_alloc.c:5227 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0x102/0x280 mm/mempolicy.c:2577 vm_area_alloc_pages mm/vmalloc.c:3718 [inline] __vmalloc_area_node mm/vmalloc.c:3863 [inline] __vmalloc_node_range_noprof+0x1577/0x2d90 mm/vmalloc.c:4051 __vmalloc_node_noprof mm/vmalloc.c:4111 [inline] __vmalloc_noprof+0x128/0x1f0 mm/vmalloc.c:4127 do_replace+0x467/0x8c0 net/bridge/netfilter/ebtables.c:1135 do_ebt_set_ctl+0x24f/0x2230 net/bridge/netfilter/ebtables.c:2527 nf_setsockopt+0x4fb/0x550 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x1f2/0x210 net/ipv4/ip_sockglue.c:1424 sock_common_setsockopt+0xf5/0x140 net/core/sock.c:3972 do_sock_setsockopt net/socket.c:2322 [inline] __sys_setsockopt+0x43e/0x580 net/socket.c:2347 __do_sys_setsockopt net/socket.c:2353 [inline] __se_sys_setsockopt net/socket.c:2350 [inline] __x64_sys_setsockopt+0xf4/0x1a0 net/socket.c:2350 x64_sys_call+0x28e3/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:55 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 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: 9028 Comm: syz.5.683 Tainted: G L syzkaller #0 PREEMPT(none) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 =====================================================