=====================================================
BUG: KMSAN: uninit-value in map_id_up_base kernel/user_namespace.c:355 [inline]
BUG: KMSAN: uninit-value in map_id_up kernel/user_namespace.c:385 [inline]
BUG: KMSAN: uninit-value in from_kuid+0x41e/0x990 kernel/user_namespace.c:433
 map_id_up_base kernel/user_namespace.c:355 [inline]
 map_id_up kernel/user_namespace.c:385 [inline]
 from_kuid+0x41e/0x990 kernel/user_namespace.c:433
 ocfs2_setattr+0x254/0x3140 fs/ocfs2/file.c:1133
 notify_change+0x1a8e/0x1b80 fs/attr.c:503
 do_truncate+0x22a/0x2b0 fs/open.c:65
 do_coredump+0x5234/0x54e0 fs/coredump.c:735
 get_signal+0x267a/0x2d00 kernel/signal.c:2902
 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x5d/0x170 kernel/entry/common.c:218
 do_syscall_64+0xda/0x1e0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable newattrs created at:
 do_truncate+0x4c/0x2b0 fs/open.c:43
 do_coredump+0x5234/0x54e0 fs/coredump.c:735

CPU: 0 UID: 0 PID: 11954 Comm: syz.2.1544 Tainted: G        W          6.12.0-rc2-syzkaller-00260-g9e4c6c1ad9a1 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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