From: Jan Harkes <jaharkes@cs.cmu.edu>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Harkes <jaharkes@cs.cmu.edu>,
linux-fsdevel@vger.kernel.org,
Zhouyang Jia <jiazhouyang09@gmail.com>
Subject: [PATCH 04/22] coda: add error handling for fget
Date: Fri, 17 May 2019 14:36:42 -0400 [thread overview]
Message-ID: <2514ec03df9c33b86e56748513267a80dd8004d9.1558117389.git.jaharkes@cs.cmu.edu> (raw)
In-Reply-To: <cover.1558117389.git.jaharkes@cs.cmu.edu>
From: Zhouyang Jia <jiazhouyang09@gmail.com>
When fget fails, the lack of error-handling code may
cause unexpected results.
This patch adds error-handling code after calling fget.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu>
---
fs/coda/psdev.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index f2bb7985d21c..12cec325384c 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -186,8 +186,11 @@ 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);
--
2.20.1
next prev parent reply other threads:[~2019-05-17 18:37 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 18:36 [PATCH 00/22] Coda updates Jan Harkes
2019-05-17 18:36 ` [PATCH 01/22] coda: pass the host file in vma->vm_file on mmap Jan Harkes
[not found] ` <20190518122241.D867120B7C@mail.kernel.org>
2019-05-18 13:18 ` Jan Harkes
2019-05-17 18:36 ` [PATCH 02/22] uapi linux/coda.h: use __kernel_pid_t for userspace Jan Harkes
2019-05-17 18:36 ` [PATCH 03/22] uapi linux/coda_psdev.h: move upc_req definition from uapi to kernel side headers Jan Harkes
2019-05-17 18:36 ` Jan Harkes [this message]
2019-05-17 18:36 ` [PATCH 05/22] coda: potential buffer overflow in coda_psdev_write() Jan Harkes
2019-05-17 18:36 ` [PATCH 06/22] coda: Fix build using bare-metal toolchain Jan Harkes
2019-05-17 18:36 ` [PATCH 07/22] coda: don't try to print names that were considered too long Jan Harkes
2019-05-17 18:36 ` [PATCH 08/22] uapi linux/coda_psdev.h: Move CODA_REQ_ from uapi to kernel side headers Jan Harkes
2019-05-17 18:36 ` [PATCH 09/22] coda: clean up indentation, replace spaces with tab Jan Harkes
2019-05-17 18:36 ` [PATCH 10/22] coda: stop using 'struct timespec' in user API Jan Harkes
2019-05-17 18:36 ` [PATCH 11/22] coda: change Coda's user api to use 64-bit time_t in timespec Jan Harkes
2019-05-17 18:36 ` [PATCH 12/22] coda: get rid of CODA_ALLOC() Jan Harkes
2019-05-17 18:36 ` [PATCH 13/22] coda: get rid of CODA_FREE() Jan Harkes
2019-05-17 18:36 ` [PATCH 14/22] coda: bump module version Jan Harkes
2019-05-17 18:36 ` [PATCH 15/22] coda: Move internal defs out of include/linux/ [ver #2] Jan Harkes
2019-05-17 18:36 ` [PATCH 16/22] coda: remove uapi/linux/coda_psdev.h Jan Harkes
2019-05-17 23:29 ` Andrew Morton
2019-05-17 23:49 ` Andrew Morton
2019-05-17 23:51 ` Jan Harkes
2019-05-17 18:36 ` [PATCH 17/22] coda: destroy mutex in put_super() Jan Harkes
2019-05-17 18:36 ` [PATCH 18/22] coda: use SIZE() for stat Jan Harkes
2019-05-17 18:36 ` [PATCH 19/22] coda: add __init to init_coda_psdev() Jan Harkes
2019-05-17 18:36 ` [PATCH 20/22] coda: remove sysctl object from module when unused Jan Harkes
2019-05-17 18:36 ` [PATCH 21/22] coda: remove sb test in coda_fid_to_inode() Jan Harkes
2019-05-17 18:37 ` [PATCH 22/22] coda: ftoc validity check integration Jan Harkes
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