loop1: detected capacity change from 0 to 64
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BUG: KMSAN: uninit-value in __hfs_ext_read_extent fs/hfs/extent.c:160 [inline]
BUG: KMSAN: uninit-value in hfs_free_fork+0x929/0xa70 fs/hfs/extent.c:320
 __hfs_ext_read_extent fs/hfs/extent.c:160 [inline]
 hfs_free_fork+0x929/0xa70 fs/hfs/extent.c:320
 hfs_cat_delete+0x47c/0xb90 fs/hfs/catalog.c:247
 hfs_remove+0x167/0x310 fs/hfs/dir.c:262
 vfs_unlink+0x613/0xab0 fs/namei.c:4595
 do_unlinkat+0x6e6/0xe50 fs/namei.c:4659
 __do_sys_unlinkat fs/namei.c:4700 [inline]
 __se_sys_unlinkat fs/namei.c:4693 [inline]
 __ia32_sys_unlinkat+0x1a5/0x210 fs/namei.c:4693
 ia32_sys_call+0x3d22/0x42c0 arch/x86/include/generated/asm/syscalls_32.h:302
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:4982
 alloc_slab_page mm/slub.c:2453 [inline]
 allocate_slab+0x19c/0x1220 mm/slub.c:2619
 new_slab mm/slub.c:2673 [inline]
 ___slab_alloc+0xfec/0x3480 mm/slub.c:3859
 __slab_alloc mm/slub.c:3949 [inline]
 __slab_alloc_node mm/slub.c:4024 [inline]
 slab_alloc_node mm/slub.c:4185 [inline]
 __kmalloc_cache_node_noprof+0x911/0xef0 mm/slub.c:4367
 kmalloc_node_noprof include/linux/slab.h:928 [inline]
 alloc_node_nr_active kernel/workqueue.c:4874 [inline]
 __alloc_workqueue kernel/workqueue.c:5728 [inline]
 alloc_workqueue+0xaaa/0x3aa0 kernel/workqueue.c:5788
 __ext4_fill_super fs/ext4/super.c:5488 [inline]
 ext4_fill_super+0x8ba2/0xa770 fs/ext4/super.c:5724
 get_tree_bdev_flags+0x6e3/0x920 fs/super.c:1681
 get_tree_bdev+0x38/0x50 fs/super.c:1704
 ext4_get_tree+0x35/0x40 fs/ext4/super.c:5756
 vfs_get_tree+0xb0/0x5c0 fs/super.c:1804
 do_new_mount+0x738/0x1610 fs/namespace.c:3902
 path_mount+0x6db/0x1e90 fs/namespace.c:4226
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount+0x6eb/0x7d0 fs/namespace.c:4427
 __ia32_sys_mount+0xe2/0x150 fs/namespace.c:4427
 ia32_sys_call+0x2733/0x42c0 arch/x86/include/generated/asm/syscalls_32.h:22
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb0/0x150 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 0 UID: 0 PID: 6152 Comm: syz.1.51 Not tainted 6.16.0-syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
=====================================================