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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,
	Dan Carpenter <dan.carpenter@oracle.com>
Subject: [PATCH 12/22] coda: get rid of CODA_ALLOC()
Date: Fri, 17 May 2019 14:36:50 -0400
Message-ID: <e56010c822e7a7cbaa8a238cf82ad31c67eaa800.1558117389.git.jaharkes@cs.cmu.edu> (raw)
In-Reply-To: <cover.1558117389.git.jaharkes@cs.cmu.edu>

From: Dan Carpenter <dan.carpenter@oracle.com>

These days we have kvzalloc() so we can delete CODA_ALLOC().

I made a couple related changes in coda_psdev_write().  First, I
added some error handling to avoid a NULL dereference if the allocation
failed.  Second, I used kvmalloc() instead of kvzalloc() because we
copy over the memory on the next line so there is no need to zero it
first.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu>
---
 fs/coda/coda_linux.h | 10 ----------
 fs/coda/psdev.c      |  6 +++++-
 fs/coda/upcall.c     |  4 ++--
 3 files changed, 7 insertions(+), 13 deletions(-)

diff --git a/fs/coda/coda_linux.h b/fs/coda/coda_linux.h
index 126155cadfa9..1ea9521e79d7 100644
--- a/fs/coda/coda_linux.h
+++ b/fs/coda/coda_linux.h
@@ -63,16 +63,6 @@ unsigned short coda_flags_to_cflags(unsigned short);
 void coda_sysctl_init(void);
 void coda_sysctl_clean(void);
 
-#define CODA_ALLOC(ptr, cast, size) do { \
-    if (size < PAGE_SIZE) \
-        ptr = kzalloc((unsigned long) size, GFP_KERNEL); \
-    else \
-        ptr = (cast)vzalloc((unsigned long) size); \
-    if (!ptr) \
-	pr_warn("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
-} while (0)
-
-
 #define CODA_FREE(ptr, size) kvfree((ptr))
 
 /* inode to cnode access functions */
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 7e9ee614ec57..e90ac440fa29 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -127,7 +127,11 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
 				hdr.opcode, hdr.unique);
 		        nbytes = size;
 		}
-		CODA_ALLOC(dcbuf, union outputArgs *, nbytes);
+		dcbuf = kvmalloc(nbytes, GFP_KERNEL);
+		if (!dcbuf) {
+			retval = -ENOMEM;
+			goto out;
+		}
 		if (copy_from_user(dcbuf, buf, nbytes)) {
 			CODA_FREE(dcbuf, nbytes);
 			retval = -EFAULT;
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index cf1e662681a5..b6ac5fc98189 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -46,7 +46,7 @@ static void *alloc_upcall(int opcode, int size)
 {
 	union inputArgs *inp;
 
-	CODA_ALLOC(inp, union inputArgs *, size);
+	inp = kvzalloc(size, GFP_KERNEL);
         if (!inp)
 		return ERR_PTR(-ENOMEM);
 
@@ -743,7 +743,7 @@ static int coda_upcall(struct venus_comm *vcp,
 	sig_req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
 	if (!sig_req) goto exit;
 
-	CODA_ALLOC((sig_req->uc_data), char *, sizeof(struct coda_in_hdr));
+	sig_req->uc_data = kvzalloc(sizeof(struct coda_in_hdr), GFP_KERNEL);
 	if (!sig_req->uc_data) {
 		kfree(sig_req);
 		goto exit;
-- 
2.20.1


  parent reply index

Thread overview: 28+ 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 ` [PATCH 04/22] coda: add error handling for fget Jan Harkes
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 ` Jan Harkes [this message]
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
  -- strict thread matches above, loose matches on Subject: below --
2019-03-20 16:45 [PATCH 00/22] Coda updates for linux-5.1 Jan Harkes
2019-03-20 16:45 ` [PATCH 12/22] coda: get rid of CODA_ALLOC() Jan Harkes

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