=====================================================
BUG: KMSAN: uninit-value in crc32_be_base lib/crc/crc32-main.c:46 [inline]
BUG: KMSAN: uninit-value in crc32_be+0x228/0x270 lib/crc/crc32-main.c:80
 crc32_be_base lib/crc/crc32-main.c:46 [inline]
 crc32_be+0x228/0x270 lib/crc/crc32-main.c:80
 sw842_compress+0x45f8/0x5060 lib/842/842_compress.c:584
 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:1428 [inline]
 zswap_store+0x1a23/0x4b20 mm/zswap.c:1539
 swap_writeout+0x8bd/0x1380 mm/page_io.c:275
 shmem_writeout+0x1ac0/0x1f50 mm/shmem.c:1685
 writeout mm/vmscan.c:649 [inline]
 pageout mm/vmscan.c:698 [inline]
 shrink_folio_list+0x5951/0x7fd0 mm/vmscan.c:1418
 evict_folios+0x9aa3/0xc030 mm/vmscan.c:4711
 try_to_shrink_lruvec+0x1251/0x1750 mm/vmscan.c:4874
 lru_gen_shrink_lruvec mm/vmscan.c:5023 [inline]
 shrink_lruvec+0x505/0x4d80 mm/vmscan.c:5784
 shrink_node_memcgs mm/vmscan.c:6020 [inline]
 shrink_node+0xf09/0x51a0 mm/vmscan.c:6061
 shrink_zones mm/vmscan.c:6300 [inline]
 do_try_to_free_pages+0x956/0x26c0 mm/vmscan.c:6362
 try_to_free_mem_cgroup_pages+0x3ad/0x950 mm/vmscan.c:6690
 try_charge_memcg+0x80b/0x1c20 mm/memcontrol.c:2388
 try_charge mm/memcontrol.c:2530 [inline]
 charge_memcg mm/memcontrol.c:4728 [inline]
 __mem_cgroup_charge+0x114/0x5c0 mm/memcontrol.c:4745
 mem_cgroup_charge include/linux/memcontrol.h:663 [inline]
 shmem_alloc_and_add_folio+0xe4d/0x1bd0 mm/shmem.c:1965
 shmem_get_folio_gfp+0xad3/0x1fc0 mm/shmem.c:2579
 shmem_get_folio mm/shmem.c:2685 [inline]
 shmem_write_begin+0x230/0x560 mm/shmem.c:3338
 generic_perform_write+0x364/0x1050 mm/filemap.c:4314
 shmem_file_write_iter+0x2b7/0x2f0 mm/shmem.c:3513
 __kernel_write_iter+0x6f9/0xdd0 fs/read_write.c:619
 dump_emit_page fs/coredump.c:1298 [inline]
 dump_user_range+0x192d/0x2230 fs/coredump.c:1372
 elf_core_dump+0x697f/0x6c30 fs/binfmt_elf.c:2111
 coredump_write+0x209c/0x2d30 fs/coredump.c:1049
 do_coredump fs/coredump.c:1126 [inline]
 vfs_coredump+0x7a08/0x8d90 fs/coredump.c:1200
 get_signal+0x2068/0x29d0 kernel/signal.c:3019
 arch_do_signal_or_restart+0x53/0xc00 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0xef/0x6d0 kernel/entry/common.c:196
 exc_general_protection+0x15c/0x1c0 arch/x86/kernel/traps.c:913
 asm_exc_general_protection+0x2b/0x30 arch/x86/include/asm/idtentry.h:612

Uninit was created at:
 __alloc_frozen_pages_noprof+0x6df/0xf50 mm/page_alloc.c:5263
 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2486
 folio_alloc_mpol_noprof+0x56/0x1d0 mm/mempolicy.c:2505
 shmem_alloc_folio mm/shmem.c:1913 [inline]
 shmem_alloc_and_add_folio+0xc54/0x1bd0 mm/shmem.c:1955
 shmem_get_folio_gfp+0xad3/0x1fc0 mm/shmem.c:2579
 shmem_get_folio mm/shmem.c:2685 [inline]
 shmem_symlink+0x562/0xad0 mm/shmem.c:4152
 vfs_symlink+0x8ea/0x9b0 fs/namei.c:5523
 do_symlinkat+0x2c6/0xbc0 fs/namei.c:5550
 __do_sys_symlinkat fs/namei.c:5571 [inline]
 __se_sys_symlinkat fs/namei.c:5568 [inline]
 __x64_sys_symlinkat+0xf5/0x180 fs/namei.c:5568
 x64_sys_call+0x342f/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:267
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 19998 Comm: syz.7.2941 Tainted: G             L      syzkaller #0 PREEMPT(voluntary) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
=====================================================