Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KMSAN: uninit-value in hfs_revalidate_dentry
loop0: detected capacity change from 0 to 64
=====================================================
BUG: KMSAN: uninit-value in hfs_revalidate_dentry+0x30b/0x3f0 fs/hfs/sysdep.c:30
hfs_revalidate_dentry+0x30b/0x3f0 fs/hfs/sysdep.c:30
lookup_fast+0x418/0x8e0
walk_component fs/namei.c:2000 [inline]
link_path_walk+0x817/0x1490 fs/namei.c:2331
path_lookupat+0xd9/0x6f0 fs/namei.c:2484
filename_lookup+0x22f/0x750 fs/namei.c:2514
user_path_at_empty+0x8b/0x3a0 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3689 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount+0x66b/0x810 fs/namespace.c:3875
__x64_sys_mount+0xe4/0x150 fs/namespace.c:3875
x64_sys_call+0x2bf4/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:166
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
Uninit was created at:
__alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page mm/slub.c:2175 [inline]
allocate_slab mm/slub.c:2338 [inline]
new_slab+0x2de/0x1400 mm/slub.c:2391
___slab_alloc+0x1184/0x33d0 mm/slub.c:3525
__slab_alloc mm/slub.c:3610 [inline]
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
kmem_cache_alloc_lru+0x6d7/0xbe0 mm/slub.c:3864
alloc_inode_sb include/linux/fs.h:3091 [inline]
hfs_alloc_inode+0x5a/0xd0 fs/hfs/super.c:165
alloc_inode+0x86/0x460 fs/inode.c:261
iget_locked+0x2bf/0xee0 fs/inode.c:1280
hfs_btree_open+0x16c/0x1aa0 fs/hfs/btree.c:38
hfs_mdb_get+0x1fe2/0x28b0 fs/hfs/mdb.c:199
hfs_fill_super+0x1cf6/0x23c0 fs/hfs/super.c:406
mount_bdev+0x397/0x520 fs/super.c:1658
hfs_mount+0x4d/0x60 fs/hfs/super.c:456
legacy_get_tree+0x114/0x290 fs/fs_context.c:662
vfs_get_tree+0xa7/0x570 fs/super.c:1779
do_new_mount+0x71f/0x15e0 fs/namespace.c:3352
path_mount+0x742/0x1f20 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount+0x725/0x810 fs/namespace.c:3875
__x64_sys_mount+0xe4/0x150 fs/namespace.c:3875
x64_sys_call+0x2bf4/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:166
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
CPU: 0 PID: 5496 Comm: syz-executor.0 Not tainted 6.9.0-rc3-syzkaller-00365-g399f4dae683a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
=====================================================
Tested on:
commit: 399f4dae Merge tag 'for_linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1322ffdd180000
kernel config: https://syzkaller.appspot.com/x/.config?x=807e31f7fd7666b5
dashboard link: https://syzkaller.appspot.com/bug?extid=3ae6be33a50b5aae4dab
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=157ba243180000