diff options
| author | Cedric Le Goater <clg@fr.ibm.com> | 2007-07-15 23:41:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:47 -0700 |
| commit | 467e9f4b5086a60a5cb2e032ccaf4a31abadc4c2 (patch) | |
| tree | f21b3975db312e4cdee1d9d3622549de2648b7ff /kernel/utsname.c | |
| parent | 3e733f071e16bdad13a75eedb102e8941b09927e (diff) | |
| download | lwn-467e9f4b5086a60a5cb2e032ccaf4a31abadc4c2.tar.gz lwn-467e9f4b5086a60a5cb2e032ccaf4a31abadc4c2.zip | |
fix create_new_namespaces() return value
dup_mnt_ns() and clone_uts_ns() return NULL on failure. This is wrong,
create_new_namespaces() uses ERR_PTR() to catch an error. This means that the
subsequent create_new_namespaces() will hit BUG_ON() in copy_mnt_ns() or
copy_utsname().
Modify create_new_namespaces() to also use the errors returned by the
copy_*_ns routines and not to systematically return ENOMEM.
[oleg@tv-sign.ru: better changelog]
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/utsname.c')
| -rw-r--r-- | kernel/utsname.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/utsname.c b/kernel/utsname.c index 160c8c5136bd..3ae43936bd88 100644 --- a/kernel/utsname.c +++ b/kernel/utsname.c @@ -13,6 +13,7 @@ #include <linux/uts.h> #include <linux/utsname.h> #include <linux/version.h> +#include <linux/err.h> /* * Clone a new ns copying an original utsname, setting refcount to 1 @@ -24,10 +25,11 @@ static struct uts_namespace *clone_uts_ns(struct uts_namespace *old_ns) struct uts_namespace *ns; ns = kmalloc(sizeof(struct uts_namespace), GFP_KERNEL); - if (ns) { - memcpy(&ns->name, &old_ns->name, sizeof(ns->name)); - kref_init(&ns->kref); - } + if (!ns) + return ERR_PTR(-ENOMEM); + + memcpy(&ns->name, &old_ns->name, sizeof(ns->name)); + kref_init(&ns->kref); return ns; } |