Shrink stack space usage in cifs_construct_tcon
We were reserving MAX_USERNAME (now 256) on stack for something which only needs to fit about 24 bytes ie string krb50x + printf version of uid Signed-off-by: Steve French <sfrench@us.ibm.com>
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@ -274,7 +274,8 @@ struct cifsSesInfo {
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int capabilities;
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char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
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TCP names - will ipv6 and sctp addresses fit? */
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char *user_name;
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char *user_name; /* must not be null except during init of sess
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and after mount option parsing we fill it */
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char *domainName;
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char *password;
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struct session_key auth_key;
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@ -3258,7 +3258,9 @@ cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
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struct cifsSesInfo *ses;
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struct cifsTconInfo *tcon = NULL;
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struct smb_vol *vol_info;
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char username[MAX_USERNAME_SIZE + 1];
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char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */
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/* We used to have this as MAX_USERNAME which is */
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/* way too big now (256 instead of 32) */
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vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
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if (vol_info == NULL) {
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