diff options
| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2008-04-17 20:42:09 +0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-04-20 00:55:22 +0400 |
| commit | 63649bd7080a6a50fabcb1935f4b7c4e64155066 (patch) | |
| tree | 84e398f5d3f191526dd511c112391befbd46dfda | |
| parent | cd019f7517206a74d8cdb64d5c82b1f76be608cc (diff) | |
| download | linux-63649bd7080a6a50fabcb1935f4b7c4e64155066.tar.xz | |
NFS - fix potential NULL pointer dereference v2
There is possible NULL pointer dereference if kstr[n]dup failed.
So fix them for safety.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/super.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index c99ca1f992ce..2215bcd24bd2 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1297,6 +1297,8 @@ static int nfs_validate_mount_data(void *options, args->namlen = data->namlen; args->bsize = data->bsize; args->auth_flavors[0] = data->pseudoflavor; + if (!args->nfs_server.hostname) + goto out_nomem; /* * The legacy version 6 binary mount data from userspace has a @@ -1343,6 +1345,8 @@ static int nfs_validate_mount_data(void *options, len = c - dev_name; /* N.B. caller will free nfs_server.hostname in all cases */ args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); + if (!args->nfs_server.hostname) + goto out_nomem; c++; if (strlen(c) > NFS_MAXPATHLEN) @@ -1386,6 +1390,10 @@ out_v3_not_compiled: return -EPROTONOSUPPORT; #endif /* !CONFIG_NFS_V3 */ +out_nomem: + dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); + return -ENOMEM; + out_no_address: dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); return -EINVAL; @@ -1892,12 +1900,16 @@ static int nfs4_validate_mount_data(void *options, return -ENAMETOOLONG; /* N.B. caller will free nfs_server.hostname in all cases */ args->nfs_server.hostname = kstrndup(dev_name, len, GFP_KERNEL); + if (!args->nfs_server.hostname) + goto out_nomem; c++; /* step over the ':' */ len = strlen(c); if (len > NFS4_MAXPATHLEN) return -ENAMETOOLONG; args->nfs_server.export_path = kstrndup(c, len, GFP_KERNEL); + if (!args->nfs_server.export_path) + goto out_nomem; dprintk("NFS: MNTPATH: '%s'\n", args->nfs_server.export_path); @@ -1919,6 +1931,10 @@ out_inval_auth: data->auth_flavourlen); return -EINVAL; +out_nomem: + dfprintk(MOUNT, "NFS4: not enough memory to handle mount options\n"); + return -ENOMEM; + out_no_address: dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); return -EINVAL; |