Prev: [61/89] mm: replace various uses of num_physpages by totalram_pages
Next: [26/89] nozomi: quick fix for the close/close bug
From: Greg KH on 30 Mar 2010 20:30
2.6.31-stable review patch. If anyone has any objections, please let us know.

------------------

From: Jeff Layton <jlayton(a)redhat.com>

commit f12f98dba6ea1517cd7fbb912208893b9c014c15 upstream.

cifs_from_ucs2 returns the length of the converted name, including the
length of the NULL terminator. We don't want to include the NULL
terminator in the dentry name length however since that'll throw off the
hash calculation for the dentry cache.

I believe that this is the root cause of several problems that have
cropped up recently that seem to be papered over with the "noserverino"
mount option. More confirmation of that would be good, but this is
clearly a bug and it fixes at least one reproducible problem that
was reported.

This patch fixes at least this reproducer in this kernel.org bug:

http://bugzilla.kernel.org/show_bug.cgi?id=15088#c12

Reported-by: Bjorn Tore Sund <bjorn.sund(a)it.uib.no>
Acked-by: Dave Kleikamp <shaggy(a)linux.vnet.ibm.com>
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
Signed-off-by: Steve French <sfrench(a)us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
fs/cifs/readdir.c | 1 +
1 file changed, 1 insertion(+)

--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -666,6 +666,7 @@ static int cifs_get_name_from_search_buf
min(len, max_len), nlt,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
+ pqst->len -= nls_nullsize(nlt);
} else {
pqst->name = filename;
pqst->len = len;


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [61/89] mm: replace various uses of num_physpages by totalram_pages
Next: [26/89] nozomi: quick fix for the close/close bug