=====================================================
BUG: KMSAN: uninit-value in array_map_lookup_elem+0x14d/0x170 kernel/bpf/arraymap.c:168
 array_map_lookup_elem+0x14d/0x170 kernel/bpf/arraymap.c:168
 ____bpf_map_lookup_elem kernel/bpf/helpers.c:42 [inline]
 bpf_map_lookup_elem+0x5c/0x80 kernel/bpf/helpers.c:38
 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997
 __bpf_prog_run64+0xb5/0xe0 kernel/bpf/core.c:2236
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
 bpf_trace_run3+0x132/0x320 kernel/trace/bpf_trace.c:2421
 __bpf_trace_ext4_es_insert_delayed_block+0x34/0x50 include/trace/events/ext4.h:2481
 trace_ext4_es_insert_delayed_block include/trace/events/ext4.h:2481 [inline]
 ext4_es_insert_delayed_block+0x11e1/0x1290 fs/ext4/extents_status.c:2082
 ext4_insert_delayed_block fs/ext4/inode.c:1676 [inline]
 ext4_da_map_blocks fs/ext4/inode.c:1777 [inline]
 ext4_da_get_block_prep+0x1714/0x1d30 fs/ext4/inode.c:1817
 ext4_block_write_begin+0x749/0x1df0 fs/ext4/inode.c:1055
 ext4_da_write_begin+0x889/0xec0 fs/ext4/inode.c:2894
 generic_perform_write+0x400/0xc60 mm/filemap.c:3974
 ext4_buffered_write_iter+0x564/0xaa0 fs/ext4/file.c:299
 ext4_file_write_iter+0x208/0x3450
 __kernel_write_iter+0x68b/0xc40 fs/read_write.c:523
 dump_emit_page fs/coredump.c:890 [inline]
 dump_user_range+0x8dc/0xee0 fs/coredump.c:951
 elf_core_dump+0x520f/0x59c0 fs/binfmt_elf.c:2077
 do_coredump+0x32d5/0x4920 fs/coredump.c:764
 get_signal+0x267e/0x2d00 kernel/signal.c:2896
 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0xa6/0x160 kernel/entry/common.c:225
 irqentry_exit+0x16/0x60 kernel/entry/common.c:328
 exc_page_fault+0x523/0x730 arch/x86/mm/fault.c:1566
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623

Local variable stack created at:
 __bpf_prog_run64+0x45/0xe0 kernel/bpf/core.c:2236
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
 bpf_trace_run3+0x132/0x320 kernel/trace/bpf_trace.c:2421

CPU: 1 PID: 10101 Comm: syz-executor.4 Not tainted 6.8.0-syzkaller-11409-gf6cef5f8c37f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
=====================================================