diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2013-01-31 07:21:14 +0400 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2013-02-13 18:00:53 +0400 |
| commit | d83f5901bc0cd7131a3b8534169ee889efc4c257 (patch) | |
| tree | ec47947fcec33d9d373367d86b787b08be997168 /fs/coda/upcall.c | |
| parent | 9fd973e085f7759f710603422b2e11ad5f2e000d (diff) | |
| download | linux-d83f5901bc0cd7131a3b8534169ee889efc4c257.tar.xz | |
coda: Restrict coda messages to the initial user namespace
Remove the slight chance that uids and gids in coda messages will be
interpreted in the wrong user namespace.
- Only allow processes in the initial user namespace to open the coda
character device to communicate with coda filesystems.
- Explicitly convert the uids in the coda header into the initial user
namespace.
- In coda_vattr_to_attr make kuids and kgids from the initial user
namespace uids and gids in struct coda_vattr that just came from
userspace.
- In coda_iattr_to_vattr convert kuids and kgids into uids and gids
in the intial user namespace and store them in struct coda_vattr for
sending to coda userspace programs.
Nothing needs to be changed with mounts as coda does not support
being mounted in anything other than the initial user namespace.
Cc: Jan Harkes <jaharkes@cs.cmu.edu>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/coda/upcall.c')
| -rw-r--r-- | fs/coda/upcall.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c index 5c6d2cd6ee86..3a731976dc5e 100644 --- a/fs/coda/upcall.c +++ b/fs/coda/upcall.c @@ -52,7 +52,7 @@ static void *alloc_upcall(int opcode, int size) inp->ih.opcode = opcode; inp->ih.pid = task_pid_nr_ns(current, &init_pid_ns); inp->ih.pgid = task_pgrp_nr_ns(current, &init_pid_ns); - inp->ih.uid = current_fsuid(); + inp->ih.uid = from_kuid(&init_user_ns, current_fsuid()); return (void*)inp; } @@ -157,7 +157,7 @@ int venus_lookup(struct super_block *sb, struct CodaFid *fid, } int venus_close(struct super_block *sb, struct CodaFid *fid, int flags, - vuid_t uid) + kuid_t uid) { union inputArgs *inp; union outputArgs *outp; @@ -166,7 +166,7 @@ int venus_close(struct super_block *sb, struct CodaFid *fid, int flags, insize = SIZE(release); UPARG(CODA_CLOSE); - inp->ih.uid = uid; + inp->ih.uid = from_kuid(&init_user_ns, uid); inp->coda_close.VFid = *fid; inp->coda_close.flags = flags; |