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BUG: KMSAN: uninit-value in zswap_is_page_same_filled mm/zswap.c:1175 [inline]
BUG: KMSAN: uninit-value in zswap_store+0x17ba/0x32b0 mm/zswap.c:1271
 zswap_is_page_same_filled mm/zswap.c:1175 [inline]
 zswap_store+0x17ba/0x32b0 mm/zswap.c:1271
 swap_writepage+0x122/0x340 mm/page_io.c:198
 shmem_writepage+0x1720/0x1e70 mm/shmem.c:1517
 pageout mm/vmscan.c:654 [inline]
 shrink_folio_list+0x508f/0x7760 mm/vmscan.c:1315
 evict_folios+0x9bb1/0xbaa0 mm/vmscan.c:4499
 try_to_shrink_lruvec+0x15ac/0x1b20 mm/vmscan.c:4704
 shrink_one+0x66e/0xd70 mm/vmscan.c:4743
 shrink_many mm/vmscan.c:4808 [inline]
 lru_gen_shrink_node mm/vmscan.c:4923 [inline]
 shrink_node+0x4bed/0x5890 mm/vmscan.c:5863
 kswapd_shrink_node mm/vmscan.c:6668 [inline]
 balance_pgdat mm/vmscan.c:6858 [inline]
 kswapd+0x1df1/0x4260 mm/vmscan.c:7118
 kthread+0x3ed/0x540 kernel/kthread.c:388
 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

Uninit was created at:
 __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4591
 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:3918
 shmem_file_write_iter+0x2b5/0x2e0 mm/shmem.c:2895
 __kernel_write_iter+0x329/0x930 fs/read_write.c:517
 dump_emit_page fs/coredump.c:888 [inline]
 dump_user_range+0x593/0xcd0 fs/coredump.c:915
 elf_core_dump+0x528d/0x5a40 fs/binfmt_elf.c:2077
 do_coredump+0x32c9/0x4920 fs/coredump.c:764
 get_signal+0x2185/0x2d10 kernel/signal.c:2890
 arch_do_signal_or_restart+0x53/0xca0 arch/x86/kernel/signal.c:309
 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+0x246/0x6f0 arch/x86/mm/fault.c:1564
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:570

CPU: 0 PID: 76 Comm: kswapd0 Not tainted 6.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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