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| author | Steve French <sfrench@us.ibm.com> | 2011-03-01 05:02:57 +0000 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2011-05-19 14:10:48 +0000 |
| commit | 34c87901e113799a45423fdac29c7478c889a95d (patch) | |
| tree | 1398028abbfc10d181f3a3c805c78ebb689d9e70 /fs/cifs | |
| parent | fd62cb7e7411f1f5ca774145665316d3612fed9a (diff) | |
| download | linux-34c87901e113799a45423fdac29c7478c889a95d.tar.gz linux-34c87901e113799a45423fdac29c7478c889a95d.tar.bz2 linux-34c87901e113799a45423fdac29c7478c889a95d.zip | |
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>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/cifsglob.h | 3 | ||||
| -rw-r--r-- | fs/cifs/connect.c | 4 |
2 files changed, 5 insertions, 2 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 6e211b67b273..108a1e99aa9f 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -274,7 +274,8 @@ struct cifsSesInfo { int capabilities; char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for TCP names - will ipv6 and sctp addresses fit? */ - char *user_name; + char *user_name; /* must not be null except during init of sess + and after mount option parsing we fill it */ char *domainName; char *password; struct session_key auth_key; diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 68b7dbf24b92..8d72acbd5c13 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -3258,7 +3258,9 @@ cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) struct cifsSesInfo *ses; struct cifsTconInfo *tcon = NULL; struct smb_vol *vol_info; - char username[MAX_USERNAME_SIZE + 1]; + char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */ + /* We used to have this as MAX_USERNAME which is */ + /* way too big now (256 instead of 32) */ vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); if (vol_info == NULL) { |