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| author | Ben Hutchings <ben@decadent.org.uk> | 2010-05-17 14:00:00 +0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2010-05-17 14:00:00 +0400 |
| commit | 4d92dc0f00a775dc2e1267b0e00befb783902fe7 (patch) | |
| tree | 07bb835871dfcc290f5909fe6635ab420ff61420 /fs/ext4/ioctl.c | |
| parent | 899ad0cea6ad7ff4ba24b16318edbc3cbbe03fad (diff) | |
| download | linux-4d92dc0f00a775dc2e1267b0e00befb783902fe7.tar.xz | |
ext4: Fix compat EXT4_IOC_ADD_GROUP
struct ext4_new_group_input needs to be converted because u64 has
only 32-bit alignment on some 32-bit architectures, notably i386.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ioctl.c')
| -rw-r--r-- | fs/ext4/ioctl.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 66fa0b030e37..6ddec84846cd 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -373,8 +373,29 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case EXT4_IOC32_SETRSVSZ: cmd = EXT4_IOC_SETRSVSZ; break; - case EXT4_IOC_GROUP_ADD: - break; + case EXT4_IOC32_GROUP_ADD: { + struct compat_ext4_new_group_input __user *uinput; + struct ext4_new_group_input input; + mm_segment_t old_fs; + int err; + + uinput = compat_ptr(arg); + err = get_user(input.group, &uinput->group); + err |= get_user(input.block_bitmap, &uinput->block_bitmap); + err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); + err |= get_user(input.inode_table, &uinput->inode_table); + err |= get_user(input.blocks_count, &uinput->blocks_count); + err |= get_user(input.reserved_blocks, + &uinput->reserved_blocks); + if (err) + return -EFAULT; + old_fs = get_fs(); + set_fs(KERNEL_DS); + err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, + (unsigned long) &input); + set_fs(old_fs); + return err; + } case EXT4_IOC_MOVE_EXT: break; default: |