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ANDROID: fuse: Fix umasking in backing

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We should only apply the mask ourselves if we're not
using POSIX acls

Bug: 215212818
Test: com.android.cts.externalstorageapp.CommonExternalStorageTest
      #testAllPackageDirsWritable, verify files and cache permissions
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Change-Id: If105afe62a60b93cbce1ca5ab5caf11f008aa7db
This commit is contained in:
Daniel Rosenberg
2022-01-20 16:37:23 -08:00
committed by Alessio Balsini
parent 0b57557c8d
commit eb69f26fe8
1 changed files with 8 additions and 2 deletions
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10
fs/fuse/backing.c
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@@ -1091,8 +1091,11 @@ int fuse_mknod_backing(
return -EBADF;
inode_lock_nested(backing_inode, I_MUTEX_PARENT);
mode = fmi->mode;
if (!IS_POSIXACL(backing_inode))
mode &= ~fmi->umask;
err = vfs_mknod(backing_inode, backing_path.dentry,
fmi->mode & ~fmi->umask, new_decode_dev(fmi->rdev));
mode, new_decode_dev(fmi->rdev));
inode_unlock(backing_inode);
if (err)
goto out;
@@ -1165,7 +1168,10 @@ int fuse_mkdir_backing(
return -EBADF;
inode_lock_nested(backing_inode, I_MUTEX_PARENT);
err = vfs_mkdir(backing_inode, backing_path.dentry, fmi->mode & ~fmi->umask);
mode = fmi->mode;
if (!IS_POSIXACL(backing_inode))
mode &= ~fmi->umask;
err = vfs_mkdir(backing_inode, backing_path.dentry, mode);
if (err)
goto out;
if (d_really_is_negative(backing_path.dentry) ||