=====================================================
BUG: KMSAN: uninit-value in __dev_map_lookup_elem kernel/bpf/devmap.c:441 [inline]
BUG: KMSAN: uninit-value in dev_map_lookup_elem+0xf3/0x170 kernel/bpf/devmap.c:796
 __dev_map_lookup_elem kernel/bpf/devmap.c:441 [inline]
 dev_map_lookup_elem+0xf3/0x170 kernel/bpf/devmap.c:796
 ____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_run32+0xb2/0xe0 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_run6+0x189/0x370 kernel/trace/bpf_trace.c:2424
 __bpf_trace_ext4_ext_remove_space_done+0x53/0x70 include/trace/events/ext4.h:2128
 trace_ext4_ext_remove_space_done include/trace/events/ext4.h:2128 [inline]
 ext4_ext_remove_space+0x7b3c/0x7e00 fs/ext4/extents.c:3007
 ext4_punch_hole+0x1274/0x1bb0 fs/ext4/inode.c:3994
 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
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

Local variable stack created at:
 __bpf_prog_run32+0x43/0xe0 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_run6+0x189/0x370 kernel/trace/bpf_trace.c:2424

CPU: 0 PID: 6105 Comm: syz-executor.4 Tainted: G        W          6.9.0-rc1-syzkaller-00379-g18737353cca0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
=====================================================