6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ye Bin yebin10@huawei.com
[ Upstream commit 69f3a3039b0d0003de008659cafd5a1eaaa0a7a4 ]
Introduce ITAIL helper to get the bound of xattr in inode.
Signed-off-by: Ye Bin yebin10@huawei.com Reviewed-by: Jan Kara jack@suse.cz Link: https://patch.msgid.link/20250208063141.1539283-2-yebin@huaweicloud.com Signed-off-by: Theodore Ts'o tytso@mit.edu Signed-off-by: David Nyström david.nystrom@est.tech Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ext4/xattr.c | 10 +++++----- fs/ext4/xattr.h | 3 +++ 2 files changed, 8 insertions(+), 5 deletions(-)
--- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -653,7 +653,7 @@ ext4_xattr_ibody_get(struct inode *inode return error; raw_inode = ext4_raw_inode(&iloc); header = IHDR(inode, raw_inode); - end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size; + end = ITAIL(inode, raw_inode); error = xattr_check_inode(inode, header, end); if (error) goto cleanup; @@ -797,7 +797,7 @@ ext4_xattr_ibody_list(struct dentry *den return error; raw_inode = ext4_raw_inode(&iloc); header = IHDR(inode, raw_inode); - end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size; + end = ITAIL(inode, raw_inode); error = xattr_check_inode(inode, header, end); if (error) goto cleanup; @@ -883,7 +883,7 @@ int ext4_get_inode_usage(struct inode *i goto out; raw_inode = ext4_raw_inode(&iloc); header = IHDR(inode, raw_inode); - end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size; + end = ITAIL(inode, raw_inode); ret = xattr_check_inode(inode, header, end); if (ret) goto out; @@ -2248,7 +2248,7 @@ int ext4_xattr_ibody_find(struct inode * header = IHDR(inode, raw_inode); is->s.base = is->s.first = IFIRST(header); is->s.here = is->s.first; - is->s.end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size; + is->s.end = ITAIL(inode, raw_inode); if (ext4_test_inode_state(inode, EXT4_STATE_XATTR)) { error = xattr_check_inode(inode, header, is->s.end); if (error) @@ -2799,7 +2799,7 @@ retry: */
base = IFIRST(header); - end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size; + end = ITAIL(inode, raw_inode); min_offs = end - base; total_ino = sizeof(struct ext4_xattr_ibody_header) + sizeof(u32);
--- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -68,6 +68,9 @@ struct ext4_xattr_entry { ((void *)raw_inode + \ EXT4_GOOD_OLD_INODE_SIZE + \ EXT4_I(inode)->i_extra_isize)) +#define ITAIL(inode, raw_inode) \ + ((void *)(raw_inode) + \ + EXT4_SB((inode)->i_sb)->s_inode_size) #define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
/*