===================================================== 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:5257 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 __kvmalloc_node_noprof+0xdcf/0x1eb0 mm/slub.c:7164 ip_set_alloc+0x3d/0x50 net/netfilter/ipset/ip_set_core.c:261 hash_netiface_create+0x5b6/0x1540 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0xbdd/0x2020 net/netfilter/ipset/ip_set_core.c:1109 nfnetlink_rcv_msg+0xce3/0xe80 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x54d/0x680 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x401/0x54b0 net/netfilter/nfnetlink.c:669 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x333/0x3d0 net/socket.c:742 ____sys_sendmsg+0x7f5/0xcf0 net/socket.c:2592 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2681 x64_sys_call+0x1c60/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:47 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:5257 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 __kvmalloc_node_noprof+0xdcf/0x1eb0 mm/slub.c:7164 ip_set_alloc+0x3d/0x50 net/netfilter/ipset/ip_set_core.c:261 hash_netiface_create+0x5b6/0x1540 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0xbdd/0x2020 net/netfilter/ipset/ip_set_core.c:1109 nfnetlink_rcv_msg+0xce3/0xe80 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x54d/0x680 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x401/0x54b0 net/netfilter/nfnetlink.c:669 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x333/0x3d0 net/socket.c:742 ____sys_sendmsg+0x7f5/0xcf0 net/socket.c:2592 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2681 x64_sys_call+0x1c60/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:47 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:1947 [inline] loop_process_work+0xf14/0x2020 drivers/block/loop.c:1982 loop_workfn+0x3e/0x60 drivers/block/loop.c:2006 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: ntfs_write_bh+0x6ae/0xe90 fs/ntfs3/fsntfs.c:1437 mi_write+0xb4/0x2f0 fs/ntfs3/record.c:402 ni_write_inode+0xdc9/0x1cb0 fs/ntfs3/frecord.c:3262 ntfs3_write_inode+0x94/0xb0 fs/ntfs3/inode.c:1043 write_inode fs/fs-writeback.c:1582 [inline] __writeback_single_inode+0x892/0x1190 fs/fs-writeback.c:1802 writeback_sb_inodes+0xb2d/0x1f10 fs/fs-writeback.c:2030 wb_writeback+0x4ce/0xc00 fs/fs-writeback.c:2216 wb_do_writeback fs/fs-writeback.c:2363 [inline] wb_workfn+0x397/0x1910 fs/fs-writeback.c:2403 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: hdr_insert_de+0x4c8/0x550 fs/ntfs3/index.c:838 indx_insert_into_root+0x876/0x38c0 fs/ntfs3/index.c:1627 indx_insert_entry+0xf2a/0x1050 fs/ntfs3/index.c:1991 ni_add_name+0xef7/0x11e0 fs/ntfs3/frecord.c:2931 ni_rename+0x97/0x220 fs/ntfs3/frecord.c:2962 ntfs_rename+0xdd2/0x1290 fs/ntfs3/namei.c:332 vfs_rename+0x2138/0x2640 fs/namei.c:5938 do_renameat2+0xb7f/0x15a0 fs/namei.c:6056 __do_sys_rename fs/namei.c:6099 [inline] __se_sys_rename fs/namei.c:6097 [inline] __x64_sys_rename+0xd7/0x140 fs/namei.c:6097 x64_sys_call+0x2c5/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:83 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 created at: slab_post_alloc_hook mm/slub.c:4960 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x970/0x1750 mm/slub.c:5270 ntfs_rename+0x874/0x1290 fs/ntfs3/namei.c:307 vfs_rename+0x2138/0x2640 fs/namei.c:5938 do_renameat2+0xb7f/0x15a0 fs/namei.c:6056 __do_sys_rename fs/namei.c:6099 [inline] __se_sys_rename fs/namei.c:6097 [inline] __x64_sys_rename+0xd7/0x140 fs/namei.c:6097 x64_sys_call+0x2c5/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:83 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 CPU: 0 UID: 0 PID: 8598 Comm: syz.1.754 Tainted: G L syzkaller #0 PREEMPT(none) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 =====================================================