=====================================================
BUG: KMSAN: uninit-value in lookup_elem_raw kernel/bpf/hashtab.c:642 [inline]
BUG: KMSAN: uninit-value in htab_map_delete_elem+0x492/0xaf0 kernel/bpf/hashtab.c:1427
 lookup_elem_raw kernel/bpf/hashtab.c:642 [inline]
 htab_map_delete_elem+0x492/0xaf0 kernel/bpf/hashtab.c:1427
 ____bpf_map_delete_elem kernel/bpf/helpers.c:77 [inline]
 bpf_map_delete_elem+0x5c/0x80 kernel/bpf/helpers.c:73
 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997
 __bpf_prog_run160+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_run4+0x150/0x340 kernel/trace/bpf_trace.c:2422
 __bpf_trace_ext4_writepages_result+0x3c/0x50 include/trace/events/ext4.h:542
 trace_ext4_writepages_result include/trace/events/ext4.h:542 [inline]
 ext4_do_writepages+0x6109/0x62e0 fs/ext4/inode.c:2747
 ext4_writepages+0x312/0x830 fs/ext4/inode.c:2768
 do_writepages+0x427/0xc30 mm/page-writeback.c:2612
 filemap_fdatawrite_wbc+0x1d8/0x270 mm/filemap.c:397
 __filemap_fdatawrite_range mm/filemap.c:430 [inline]
 filemap_write_and_wait_range+0x169/0x420 mm/filemap.c:685
 ext4_punch_hole+0x1aa/0x1bb0 fs/ext4/inode.c:3893
 ext4_fallocate+0x4f0/0x3940 fs/ext4/extents.c:4741
 vfs_fallocate+0x7fa/0x8b0 fs/open.c:330
 do_vfs_ioctl+0x3b0c/0x3eb0 fs/ioctl.c:883
 __do_sys_ioctl fs/ioctl.c:902 [inline]
 __se_sys_ioctl+0x170/0x450 fs/ioctl.c:890
 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890
 x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable stack created at:
 __bpf_prog_run160+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_run4+0x150/0x340 kernel/trace/bpf_trace.c:2422

CPU: 0 PID: 9373 Comm: syz-executor.3 Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
=====================================================