===================================================== BUG: KMSAN: uninit-value in check_template lib/842/842_compress.c:391 [inline] BUG: KMSAN: uninit-value in process_next lib/842/842_compress.c:456 [inline] BUG: KMSAN: uninit-value in sw842_compress+0x1323/0x4fa0 lib/842/842_compress.c:545 check_template lib/842/842_compress.c:391 [inline] process_next lib/842/842_compress.c:456 [inline] sw842_compress+0x1323/0x4fa0 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:1429 [inline] zswap_store+0x1ea0/0x4bb0 mm/zswap.c:1540 swap_writeout+0x8c1/0x1390 mm/page_io.c:275 shmem_writeout+0x1ac6/0x1f70 mm/shmem.c:1642 writeout mm/vmscan.c:660 [inline] pageout mm/vmscan.c:721 [inline] shrink_folio_list+0x56ca/0x7e30 mm/vmscan.c:1453 evict_folios+0x9a43/0xc010 mm/vmscan.c:4745 try_to_shrink_lruvec+0x12b6/0x17e0 mm/vmscan.c:4908 lru_gen_shrink_lruvec mm/vmscan.c:5057 [inline] shrink_lruvec+0x46f/0x4f10 mm/vmscan.c:5818 shrink_node_memcgs mm/vmscan.c:6054 [inline] shrink_node+0x1113/0x54a0 mm/vmscan.c:6095 shrink_zones mm/vmscan.c:6339 [inline] do_try_to_free_pages+0x849/0x26b0 mm/vmscan.c:6401 try_to_free_mem_cgroup_pages+0x3ae/0x950 mm/vmscan.c:6729 try_charge_memcg+0x80f/0x1c50 mm/memcontrol.c:2356 try_charge mm/memcontrol.c:2498 [inline] charge_memcg+0xd8/0x2b0 mm/memcontrol.c:4701 __mem_cgroup_charge+0x71/0x2e0 mm/memcontrol.c:4718 mem_cgroup_charge include/linux/memcontrol.h:662 [inline] shmem_alloc_and_add_folio+0xe4f/0x1be0 mm/shmem.c:1922 shmem_get_folio_gfp+0xad3/0x1fc0 mm/shmem.c:2535 shmem_read_folio_gfp+0xac/0x1a0 mm/shmem.c:5933 drm_gem_get_pages+0x3ba/0x14c0 drivers/gpu/drm/drm_gem.c:656 drm_gem_shmem_get_pages_locked+0x1d2/0x4e0 drivers/gpu/drm/drm_gem_shmem_helper.c:200 drm_gem_shmem_pin_locked+0x2b3/0x580 drivers/gpu/drm/drm_gem_shmem_helper.c:261 drm_gem_shmem_vmap_locked+0x4cd/0x800 drivers/gpu/drm/drm_gem_shmem_helper.c:365 drm_gem_shmem_object_vmap+0x36/0x50 include/drm/drm_gem_shmem_helper.h:243 drm_gem_vmap_locked drivers/gpu/drm/drm_gem.c:1279 [inline] drm_gem_vmap+0xbd/0x1e0 drivers/gpu/drm/drm_gem.c:1321 drm_gem_fb_vmap+0x104/0x560 drivers/gpu/drm/drm_gem_framebuffer_helper.c:368 vkms_prepare_fb+0x119/0x170 drivers/gpu/drm/vkms/vkms_plane.c:195 drm_atomic_helper_prepare_planes+0x4b5/0x1290 drivers/gpu/drm/drm_atomic_helper.c:2760 drm_atomic_helper_commit+0x1f4/0x1020 drivers/gpu/drm/drm_atomic_helper.c:2189 drm_atomic_commit+0x319/0x390 drivers/gpu/drm/drm_atomic.c:1577 drm_atomic_helper_update_plane+0x3c2/0x650 drivers/gpu/drm/drm_atomic_helper.c:3348 __setplane_atomic+0x342/0x3f0 drivers/gpu/drm/drm_plane.c:1101 drm_mode_cursor_universal drivers/gpu/drm/drm_plane.c:1256 [inline] drm_mode_cursor_common+0x14c0/0x1e90 drivers/gpu/drm/drm_plane.c:1315 drm_mode_cursor_ioctl+0xa2/0xd0 drivers/gpu/drm/drm_plane.c:1365 drm_ioctl_kernel+0x470/0x590 drivers/gpu/drm/drm_ioctl.c:797 drm_ioctl+0xefa/0x1730 drivers/gpu/drm/drm_ioctl.c:894 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0x23c/0x400 fs/ioctl.c:583 __x64_sys_ioctl+0x97/0xe0 fs/ioctl.c:583 x64_sys_call+0x1cbc/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 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:416 [inline] sw842_compress+0xd0a/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:1429 [inline] zswap_store+0x1ea0/0x4bb0 mm/zswap.c:1540 swap_writeout+0x8c1/0x1390 mm/page_io.c:275 shmem_writeout+0x1ac6/0x1f70 mm/shmem.c:1642 writeout mm/vmscan.c:660 [inline] pageout mm/vmscan.c:721 [inline] shrink_folio_list+0x56ca/0x7e30 mm/vmscan.c:1453 evict_folios+0x9a43/0xc010 mm/vmscan.c:4745 try_to_shrink_lruvec+0x12b6/0x17e0 mm/vmscan.c:4908 lru_gen_shrink_lruvec mm/vmscan.c:5057 [inline] shrink_lruvec+0x46f/0x4f10 mm/vmscan.c:5818 shrink_node_memcgs mm/vmscan.c:6054 [inline] shrink_node+0x1113/0x54a0 mm/vmscan.c:6095 shrink_zones mm/vmscan.c:6339 [inline] do_try_to_free_pages+0x849/0x26b0 mm/vmscan.c:6401 try_to_free_mem_cgroup_pages+0x3ae/0x950 mm/vmscan.c:6729 try_charge_memcg+0x80f/0x1c50 mm/memcontrol.c:2356 try_charge mm/memcontrol.c:2498 [inline] charge_memcg+0xd8/0x2b0 mm/memcontrol.c:4701 __mem_cgroup_charge+0x71/0x2e0 mm/memcontrol.c:4718 mem_cgroup_charge include/linux/memcontrol.h:662 [inline] shmem_alloc_and_add_folio+0xe4f/0x1be0 mm/shmem.c:1922 shmem_get_folio_gfp+0xad3/0x1fc0 mm/shmem.c:2535 shmem_read_folio_gfp+0xac/0x1a0 mm/shmem.c:5933 drm_gem_get_pages+0x3ba/0x14c0 drivers/gpu/drm/drm_gem.c:656 drm_gem_shmem_get_pages_locked+0x1d2/0x4e0 drivers/gpu/drm/drm_gem_shmem_helper.c:200 drm_gem_shmem_pin_locked+0x2b3/0x580 drivers/gpu/drm/drm_gem_shmem_helper.c:261 drm_gem_shmem_vmap_locked+0x4cd/0x800 drivers/gpu/drm/drm_gem_shmem_helper.c:365 drm_gem_shmem_object_vmap+0x36/0x50 include/drm/drm_gem_shmem_helper.h:243 drm_gem_vmap_locked drivers/gpu/drm/drm_gem.c:1279 [inline] drm_gem_vmap+0xbd/0x1e0 drivers/gpu/drm/drm_gem.c:1321 drm_gem_fb_vmap+0x104/0x560 drivers/gpu/drm/drm_gem_framebuffer_helper.c:368 vkms_prepare_fb+0x119/0x170 drivers/gpu/drm/vkms/vkms_plane.c:195 drm_atomic_helper_prepare_planes+0x4b5/0x1290 drivers/gpu/drm/drm_atomic_helper.c:2760 drm_atomic_helper_commit+0x1f4/0x1020 drivers/gpu/drm/drm_atomic_helper.c:2189 drm_atomic_commit+0x319/0x390 drivers/gpu/drm/drm_atomic.c:1577 drm_atomic_helper_update_plane+0x3c2/0x650 drivers/gpu/drm/drm_atomic_helper.c:3348 __setplane_atomic+0x342/0x3f0 drivers/gpu/drm/drm_plane.c:1101 drm_mode_cursor_universal drivers/gpu/drm/drm_plane.c:1256 [inline] drm_mode_cursor_common+0x14c0/0x1e90 drivers/gpu/drm/drm_plane.c:1315 drm_mode_cursor_ioctl+0xa2/0xd0 drivers/gpu/drm/drm_plane.c:1365 drm_ioctl_kernel+0x470/0x590 drivers/gpu/drm/drm_ioctl.c:797 drm_ioctl+0xefa/0x1730 drivers/gpu/drm/drm_ioctl.c:894 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0x23c/0x400 fs/ioctl.c:583 __x64_sys_ioctl+0x97/0xe0 fs/ioctl.c:583 x64_sys_call+0x1cbc/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 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:4272 shmem_file_write_iter+0x2b7/0x2f0 mm/shmem.c:3466 lo_rw_aio+0x1268/0x1590 drivers/block/loop.c:-1 do_req_filebacked drivers/block/loop.c:-1 [inline] loop_handle_cmd drivers/block/loop.c:1923 [inline] loop_process_work+0xe30/0x1ec0 drivers/block/loop.c:1958 loop_rootcg_workfn+0x2b/0x40 drivers/block/loop.c:1989 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3346 worker_thread+0xedf/0x1590 kernel/workqueue.c:3427 kthread+0xd5c/0xf00 kernel/kthread.c:463 ret_from_fork+0x1f5/0x4c0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was stored to memory at: ntfs_write_bh+0x6ae/0xe90 fs/ntfs3/fsntfs.c:1430 indx_write fs/ntfs3/index.c:1027 [inline] indx_insert_into_buffer+0x287/0x2010 fs/ntfs3/index.c:1819 indx_insert_entry+0xcde/0x1050 fs/ntfs3/index.c:1996 ni_add_name+0xef7/0x11e0 fs/ntfs3/frecord.c:2995 ntfs_link_inode+0x221/0x350 fs/ntfs3/inode.c:1734 ntfs_link+0x20e/0x500 fs/ntfs3/namei.c:146 vfs_link+0x8eb/0xb30 fs/namei.c:4941 do_linkat+0x4af/0x1040 fs/namei.c:5011 __do_sys_link fs/namei.c:5045 [inline] __se_sys_link fs/namei.c:5043 [inline] __x64_sys_link+0xd7/0x140 fs/namei.c:5043 x64_sys_call+0x162f/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:87 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: hdr_insert_de+0x4c8/0x550 fs/ntfs3/index.c:838 indx_insert_into_buffer+0x1b6/0x2010 fs/ntfs3/index.c:1815 indx_insert_entry+0xcde/0x1050 fs/ntfs3/index.c:1996 ni_add_name+0xef7/0x11e0 fs/ntfs3/frecord.c:2995 ntfs_link_inode+0x221/0x350 fs/ntfs3/inode.c:1734 ntfs_link+0x20e/0x500 fs/ntfs3/namei.c:146 vfs_link+0x8eb/0xb30 fs/namei.c:4941 do_linkat+0x4af/0x1040 fs/namei.c:5011 __do_sys_link fs/namei.c:5045 [inline] __se_sys_link fs/namei.c:5043 [inline] __x64_sys_link+0xd7/0x140 fs/namei.c:5043 x64_sys_call+0x162f/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:87 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 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:4985 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x8f5/0x1640 mm/slub.c:5295 ntfs_link_inode+0x90/0x350 fs/ntfs3/inode.c:1722 ntfs_link+0x20e/0x500 fs/ntfs3/namei.c:146 vfs_link+0x8eb/0xb30 fs/namei.c:4941 do_linkat+0x4af/0x1040 fs/namei.c:5011 __do_sys_link fs/namei.c:5045 [inline] __se_sys_link fs/namei.c:5043 [inline] __x64_sys_link+0xd7/0x140 fs/namei.c:5043 x64_sys_call+0x162f/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:87 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 6463 Comm: syz.0.15 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 =====================================================