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authorJan Harkes <jaharkes@cs.cmu.edu>2007-07-19 01:48:41 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 10:04:48 -0700
commit38c2e4370da495813ca93d7cad31ed5090e8c310 (patch)
treebf48c4a17f3f2f7cf17a20e37f55f898a332a2c7
parent18991197b4b588255ccabf472ebc84db7b66a19c (diff)
coda: do not grab an uninitialized fd when the open upcall returns an error
When open fails the fd in the response is uninitialized and we ended up taking a reference on the file struct and never released it. Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/coda/file.c7
-rw-r--r--fs/coda/psdev.c3
-rw-r--r--fs/coda/upcall.c10
3 files changed, 12 insertions, 8 deletions
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 99dbe866816..e7d622709c9 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -143,8 +143,11 @@ int coda_open(struct inode *coda_inode, struct file *coda_file)
lock_kernel();
error = venus_open(coda_inode->i_sb, coda_i2f(coda_inode), coda_flags,
- &host_file);
- if (error || !host_file) {
+ &host_file);
+ if (!host_file)
+ error = -EIO;
+
+ if (error) {
kfree(cfi);
unlock_kernel();
return error;
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 803aacf0d49..09382d47a4e 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -195,7 +195,8 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
if (req->uc_opcode == CODA_OPEN_BY_FD) {
struct coda_open_by_fd_out *outp =
(struct coda_open_by_fd_out *)req->uc_data;
- outp->fh = fget(outp->fd);
+ if (!outp->oh.result)
+ outp->fh = fget(outp->fd);
}
wake_up(&req->uc_sleep);
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index 5faacdb1a47..1651b918219 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -251,12 +251,12 @@ int venus_open(struct super_block *sb, struct CodaFid *fid,
insize = SIZE(open_by_fd);
UPARG(CODA_OPEN_BY_FD);
- inp->coda_open.VFid = *fid;
- inp->coda_open.flags = flags;
+ inp->coda_open_by_fd.VFid = *fid;
+ inp->coda_open_by_fd.flags = flags;
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
-
- *fh = outp->coda_open_by_fd.fh;
+ error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+ if (!error)
+ *fh = outp->coda_open_by_fd.fh;
CODA_FREE(inp, insize);
return error;