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authorZhouyang Jia <jiazhouyang09@gmail.com>2019-07-16 16:28:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-16 19:23:23 -0700
commit02551c23bcd85f0c68a8259c7b953d49d44f86af (patch)
tree972a790291f19f208d97713d70bb67268c9b34b8 /fs/coda
parentf90fb3c7e2c13ae829db2274b88b845a75038b8a (diff)
coda: add error handling for fget
When fget fails, the lack of error-handling code may cause unexpected results. This patch adds error-handling code after calling fget. Link: http://lkml.kernel.org/r/2514ec03df9c33b86e56748513267a80dd8004d9.1558117389.git.jaharkes@cs.cmu.edu Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com> Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Colin Ian King <colin.king@canonical.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: David Howells <dhowells@redhat.com> Cc: Fabian Frederick <fabf@skynet.be> Cc: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Sam Protsenko <semen.protsenko@linaro.org> Cc: Yann Droneaud <ydroneaud@opteya.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/coda')
-rw-r--r--fs/coda/psdev.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 0ceef32e6fae..241f7e04ad04 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -182,8 +182,11 @@ 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;
- if (!outp->oh.result)
+ if (!outp->oh.result) {
outp->fh = fget(outp->fd);
+ if (!outp->fh)
+ return -EBADF;
+ }
}
wake_up(&req->uc_sleep);