=====================================================
BUG: KMSAN: uninit-value in zswap_rb_search mm/zswap.c:324 [inline]
BUG: KMSAN: uninit-value in zswap_store+0x3d8/0x32b0 mm/zswap.c:1232
 zswap_rb_search mm/zswap.c:324 [inline]
 zswap_store+0x3d8/0x32b0 mm/zswap.c:1232
 swap_writepage+0x122/0x340 mm/page_io.c:198
 pageout mm/vmscan.c:654 [inline]
 shrink_folio_list+0x508f/0x7760 mm/vmscan.c:1315
 evict_folios+0x9bb1/0xbaa0 mm/vmscan.c:4504
 try_to_shrink_lruvec+0x15ac/0x1b20 mm/vmscan.c:4709
 shrink_one+0x66e/0xd70 mm/vmscan.c:4748
 shrink_many mm/vmscan.c:4813 [inline]
 lru_gen_shrink_node mm/vmscan.c:4928 [inline]
 shrink_node+0x4bed/0x5890 mm/vmscan.c:5868
 shrink_zones mm/vmscan.c:6121 [inline]
 do_try_to_free_pages+0x8fe/0x2530 mm/vmscan.c:6183
 try_to_free_pages+0xbdc/0x17a0 mm/vmscan.c:6418
 __perform_reclaim mm/page_alloc.c:3769 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3791 [inline]
 __alloc_pages_slowpath+0x1027/0x30c0 mm/page_alloc.c:4196
 __alloc_pages+0xa45/0xe00 mm/page_alloc.c:4581
 alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133
 shmem_alloc_folio mm/shmem.c:1630 [inline]
 shmem_alloc_and_add_folio+0x2e3/0x1250 mm/shmem.c:1670
 shmem_get_folio_gfp+0x941/0x2290 mm/shmem.c:2054
 shmem_get_folio mm/shmem.c:2136 [inline]
 shmem_write_begin+0x14f/0x490 mm/shmem.c:2719
 generic_perform_write+0x3f5/0xc40 mm/filemap.c:3927
 shmem_file_write_iter+0x2b5/0x2e0 mm/shmem.c:2895
 call_write_iter include/linux/fs.h:2084 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x786/0x1200 fs/read_write.c:590
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xd0 fs/read_write.c:652
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was created at:
 __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4591
 alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133
 alloc_pages+0x1be/0x1e0 mm/mempolicy.c:2204
 alloc_slab_page mm/slub.c:1870 [inline]
 allocate_slab mm/slub.c:2017 [inline]
 new_slab+0x421/0x1570 mm/slub.c:2070
 ___slab_alloc+0x13db/0x33d0 mm/slub.c:3223
 __slab_alloc mm/slub.c:3322 [inline]
 __slab_alloc_node mm/slub.c:3375 [inline]
 slab_alloc_node mm/slub.c:3468 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc+0x6e1/0xa90 mm/slub.c:3502
 zswap_entry_cache_alloc mm/zswap.c:302 [inline]
 zswap_store+0xee9/0x32b0 mm/zswap.c:1263
 swap_writepage+0x122/0x340 mm/page_io.c:198
 pageout mm/vmscan.c:654 [inline]
 shrink_folio_list+0x508f/0x7760 mm/vmscan.c:1315
 evict_folios+0x9bb1/0xbaa0 mm/vmscan.c:4504
 try_to_shrink_lruvec+0x15ac/0x1b20 mm/vmscan.c:4709
 shrink_one+0x66e/0xd70 mm/vmscan.c:4748
 shrink_many mm/vmscan.c:4813 [inline]
 lru_gen_shrink_node mm/vmscan.c:4928 [inline]
 shrink_node+0x4bed/0x5890 mm/vmscan.c:5868
 shrink_zones mm/vmscan.c:6121 [inline]
 do_try_to_free_pages+0x8fe/0x2530 mm/vmscan.c:6183
 try_to_free_pages+0xbdc/0x17a0 mm/vmscan.c:6418
 __perform_reclaim mm/page_alloc.c:3769 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3791 [inline]
 __alloc_pages_slowpath+0x1027/0x30c0 mm/page_alloc.c:4196
 __alloc_pages+0xa45/0xe00 mm/page_alloc.c:4581
 alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133
 shmem_alloc_folio mm/shmem.c:1630 [inline]
 shmem_alloc_and_add_folio+0x2e3/0x1250 mm/shmem.c:1670
 shmem_get_folio_gfp+0x941/0x2290 mm/shmem.c:2054
 shmem_get_folio mm/shmem.c:2136 [inline]
 shmem_write_begin+0x14f/0x490 mm/shmem.c:2719
 generic_perform_write+0x3f5/0xc40 mm/filemap.c:3927
 shmem_file_write_iter+0x2b5/0x2e0 mm/shmem.c:2895
 call_write_iter include/linux/fs.h:2084 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x786/0x1200 fs/read_write.c:590
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xd0 fs/read_write.c:652
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 1 PID: 7048 Comm: udevd Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
=====================================================