Currently sparse reports "warning: Variable length array is used." The solution is use kasprintf to allocate full xattr name.
Signed-off-by: James Simmons <uja.o...@yahoo.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-9183 Reviewed-on: https://review.whamcloud.com/27240 Reviewed-by: Dmitry Eremin <dmitry.ere...@intel.com> Reviewed-by: Bob Glossman <bob.gloss...@intel.com> Reviewed-by: Sebastien Buisson <sbuis...@ddn.com> Reviewed-by: Oleg Drokin <oleg.dro...@intel.com> Signed-off-by: James Simmons <jsimm...@infradead.org> --- drivers/staging/lustre/lustre/llite/xattr.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c index ca803ed..86b5df9 100644 --- a/drivers/staging/lustre/lustre/llite/xattr.c +++ b/drivers/staging/lustre/lustre/llite/xattr.c @@ -87,10 +87,10 @@ static int xattr_type_filter(struct ll_sb_info *sbi, const char *name, const void *value, size_t size, int flags) { - char fullname[strlen(handler->prefix) + strlen(name) + 1]; struct ll_sb_info *sbi = ll_i2sbi(inode); struct ptlrpc_request *req = NULL; const char *pv = value; + char *fullname; __u64 valid; int rc; @@ -136,10 +136,14 @@ static int xattr_type_filter(struct ll_sb_info *sbi, return -EPERM; } - sprintf(fullname, "%s%s\n", handler->prefix, name); + fullname = kasprintf(GFP_KERNEL, "%s%s", handler->prefix, name); + if (!fullname) + return -ENOMEM; + rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), valid, fullname, pv, size, 0, flags, ll_i2suppgid(inode), &req); + kfree(fullname); if (rc) { if (rc == -EOPNOTSUPP && handler->flags == XATTR_USER_T) { LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n"); @@ -389,11 +393,11 @@ static int ll_xattr_get_common(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, const char *name, void *buffer, size_t size) { - char fullname[strlen(handler->prefix) + strlen(name) + 1]; struct ll_sb_info *sbi = ll_i2sbi(inode); #ifdef CONFIG_FS_POSIX_ACL struct ll_inode_info *lli = ll_i2info(inode); #endif + char *fullname; int rc; CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p)\n", @@ -432,9 +436,15 @@ static int ll_xattr_get_common(const struct xattr_handler *handler, if (handler->flags == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode)) return -ENODATA; #endif - sprintf(fullname, "%s%s\n", handler->prefix, name); - return ll_xattr_list(inode, fullname, handler->flags, buffer, size, - OBD_MD_FLXATTR); + + fullname = kasprintf(GFP_KERNEL, "%s%s", handler->prefix, name); + if (!fullname) + return -ENOMEM; + + rc = ll_xattr_list(inode, fullname, handler->flags, buffer, size, + OBD_MD_FLXATTR); + kfree(fullname); + return rc; } static ssize_t ll_getxattr_lov(struct inode *inode, void *buf, size_t buf_size) -- 1.8.3.1 _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
