=====================================================
BUG: KMSAN: uninit-value in crc32_be_base+0x25f/0x2b0 lib/crc32.c:132
 crc32_be_base+0x25f/0x2b0 lib/crc32.c:132
 crc32_be_arch+0x3d/0x50 arch/x86/lib/crc32-glue.c:92
 crc32_be include/linux/crc32.h:28 [inline]
 sw842_compress+0x503d/0x5990 lib/842/842_compress.c:582
 crypto842_scompress+0x4f/0x70 crypto/842.c:78
 scomp_acomp_comp_decomp+0x7c6/0xb90
 scomp_acomp_compress+0x32/0x40 crypto/scompress.c:187
 crypto_acomp_compress include/crypto/acompress.h:251 [inline]
 zswap_compress mm/zswap.c:962 [inline]
 zswap_store_page mm/zswap.c:1462 [inline]
 zswap_store+0x20c9/0x48b0 mm/zswap.c:1571
 swap_writepage+0xa67/0x1950 mm/page_io.c:278
 shmem_writepage+0x2360/0x25a0 mm/shmem.c:1647
 pageout mm/vmscan.c:696 [inline]
 shrink_folio_list+0x5dd2/0x8220 mm/vmscan.c:1402
 evict_folios+0x94ed/0xb9c0 mm/vmscan.c:4660
 try_to_shrink_lruvec+0xc58/0x1080 mm/vmscan.c:4821
 lru_gen_shrink_lruvec mm/vmscan.c:4970 [inline]
 shrink_lruvec+0x49a/0x47d0 mm/vmscan.c:5715
 shrink_node_memcgs mm/vmscan.c:5951 [inline]
 shrink_node+0x105e/0x51c0 mm/vmscan.c:5992
 shrink_zones mm/vmscan.c:6237 [inline]
 do_try_to_free_pages+0x820/0x2550 mm/vmscan.c:6299
 try_to_free_mem_cgroup_pages+0x3fa/0xa60 mm/vmscan.c:6631
 try_charge_memcg+0x71a/0x1780 mm/memcontrol.c:2255
 obj_cgroup_charge_pages+0x2cb/0x640 mm/memcontrol.c:2636
 __memcg_kmem_charge_page+0x151/0x520 mm/memcontrol.c:2663
 __alloc_frozen_pages_noprof+0x93d/0xe00 mm/page_alloc.c:4756
 alloc_pages_mpol+0x4cd/0x890 mm/mempolicy.c:2270
 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline]
 alloc_pages_noprof+0x1b5/0x250 mm/mempolicy.c:2361
 io_mem_alloc_compound io_uring/memmap.c:29 [inline]
 io_region_allocate_pages+0x168/0x8b0 io_uring/memmap.c:167
 io_create_region+0x6eb/0x810 io_uring/memmap.c:223
 io_allocate_scq_urings+0x3a2/0xa50 io_uring/io_uring.c:3481
 io_uring_create+0xabc/0x1440 io_uring/io_uring.c:3703
 io_uring_setup io_uring/io_uring.c:3793 [inline]
 __do_sys_io_uring_setup io_uring/io_uring.c:3820 [inline]
 __se_sys_io_uring_setup+0x476/0x4d0 io_uring/io_uring.c:3814
 __x64_sys_io_uring_setup+0x6c/0xa0 io_uring/io_uring.c:3814
 x64_sys_call+0x2e82/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:426
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __alloc_frozen_pages_noprof+0x9a7/0xe00 mm/page_alloc.c:4762
 alloc_pages_mpol+0x4cd/0x890 mm/mempolicy.c:2270
 folio_alloc_mpol_noprof+0x57/0x1c0 mm/mempolicy.c:2289
 shmem_alloc_folio mm/shmem.c:1863 [inline]
 shmem_alloc_and_add_folio+0xbdf/0x1b80 mm/shmem.c:1902
 shmem_get_folio_gfp+0xacd/0x1f30 mm/shmem.c:2522
 shmem_get_folio mm/shmem.c:2628 [inline]
 shmem_symlink+0x523/0xb20 mm/shmem.c:4110
 vfs_symlink+0x1ed/0x460 fs/namei.c:4671
 do_symlinkat+0x253/0x8b0 fs/namei.c:4697
 __do_sys_symlinkat fs/namei.c:4713 [inline]
 __se_sys_symlinkat fs/namei.c:4710 [inline]
 __x64_sys_symlinkat+0xef/0x160 fs/namei.c:4710
 x64_sys_call+0x2db0/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:267
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 9188 Comm: syz.7.619 Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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