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BUG: KMSAN: uninit-value in zswap_is_page_same_filled mm/zswap.c:1183 [inline]
BUG: KMSAN: uninit-value in zswap_frontswap_store+0x13ef/0x30c0 mm/zswap.c:1271
 zswap_is_page_same_filled mm/zswap.c:1183 [inline]
 zswap_frontswap_store+0x13ef/0x30c0 mm/zswap.c:1271
 __frontswap_store+0x25a/0x4d0 mm/frontswap.c:186
 frontswap_store include/linux/frontswap.h:66 [inline]
 swap_writepage+0x1d3/0x3d0 mm/page_io.c:201
 shmem_writepage+0x174d/0x1eb0 mm/shmem.c:1521
 pageout mm/vmscan.c:1355 [inline]
 shrink_folio_list+0x52c8/0x74c0 mm/vmscan.c:2015
 evict_folios+0x87a5/0xa790 mm/vmscan.c:5183
 try_to_shrink_lruvec+0x16c2/0x1be0 mm/vmscan.c:5359
 shrink_one+0x479/0xcd0 mm/vmscan.c:5403
 shrink_many mm/vmscan.c:5457 [inline]
 lru_gen_shrink_node mm/vmscan.c:5574 [inline]
 shrink_node+0x4af0/0x58f0 mm/vmscan.c:6514
 kswapd_shrink_node mm/vmscan.c:7319 [inline]
 balance_pgdat+0x12fa/0x31f0 mm/vmscan.c:7509
 kswapd+0x91d/0xf10 mm/vmscan.c:7769
 kthread+0x3e8/0x540 kernel/kthread.c:389
 ret_from_fork+0x57/0x80 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Uninit was created at:
 __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4500
 __folio_alloc+0x45/0xe0 mm/page_alloc.c:4509
 vma_alloc_folio+0x14c5/0x2100 mm/mempolicy.c:2259
 shmem_alloc_folio mm/shmem.c:1658 [inline]
 shmem_alloc_and_acct_folio+0x32c/0xb00 mm/shmem.c:1683
 shmem_get_folio_gfp+0x15cd/0x2d50 mm/shmem.c:2020
 shmem_get_folio mm/shmem.c:2143 [inline]
 shmem_write_begin+0x151/0x4d0 mm/shmem.c:2688
 generic_perform_write+0x3fb/0xc50 mm/filemap.c:3928
 shmem_file_write_iter+0x2b5/0x2e0 mm/shmem.c:2865
 __kernel_write_iter+0x323/0xa40 fs/read_write.c:517
 dump_emit_page fs/coredump.c:888 [inline]
 dump_user_range+0x593/0xce0 fs/coredump.c:915
 elf_core_dump+0x528d/0x5a40 fs/binfmt_elf.c:2142
 do_coredump+0x32c8/0x4920 fs/coredump.c:764
 get_signal+0x2185/0x2bc0 kernel/signal.c:2867
 arch_do_signal_or_restart+0x4f/0x920 arch/x86/kernel/signal.c:308
 exit_to_user_mode_loop+0xe8/0x320 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0x163/0x220 kernel/entry/common.c:204
 irqentry_exit_to_user_mode+0xd/0x30 kernel/entry/common.c:309
 irqentry_exit+0x16/0x40 kernel/entry/common.c:412
 exc_page_fault+0x494/0x680 arch/x86/mm/fault.c:1545
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:570

CPU: 1 PID: 80 Comm: kswapd0 Not tainted 6.5.0-syzkaller-01207-g1c59d383390f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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