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Message-ID: <20170104142022.GL25453@dhcp22.suse.cz>
Date: Wed, 4 Jan 2017 15:20:22 +0100
From: Michal Hocko <mhocko@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Vlastimil Babka <vbabka@...e.cz>,
David Rientjes <rientjes@...gle.com>,
Mel Gorman <mgorman@...e.de>,
Johannes Weiner <hannes@...xchg.org>,
Al Viro <viro@...iv.linux.org.uk>, linux-mm@...ck.org,
LKML <linux-kernel@...r.kernel.org>, kvm@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net,
linux-security-module@...r.kernel.org, linux-ext4@...r.kernel.org,
Joe Perches <joe@...ches.com>,
Anatoly Stepanov <astepanov@...udlinux.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Mike Snitzer <snitzer@...hat.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
Theodore Ts'o <tytso@....edu>,
Andreas Dilger <adilger@...ger.ca>
Subject: Re: [PATCH] mm: introduce kv[mz]alloc helpers
OK, so I've checked the open coded implementations and converted most of
them. There are few which are either confused and need some special
handling or need double checking.
I can fold this into the original patch or keep it as a separate patch.
Whatever works better for others.
---
>From 72a8493c4f692fca8980b59e0a79d09041164203 Mon Sep 17 00:00:00 2001
From: Michal Hocko <mhocko@...e.com>
Date: Wed, 4 Jan 2017 13:30:32 +0100
Subject: [PATCH] treewide: use kv[mz]alloc* rather than opencoded variants
There are many code paths opencoding kvmalloc. Let's use the helper
instead.
This shouldn't introduce any functional change.
Signed-off-by: Michal Hocko <mhocko@...e.com>
---
arch/s390/kvm/kvm-s390.c | 10 ++--------
crypto/lzo.c | 4 +---
drivers/acpi/apei/erst.c | 8 ++------
drivers/char/agp/generic.c | 8 +-------
drivers/gpu/drm/nouveau/nouveau_gem.c | 4 +---
drivers/md/bcache/util.h | 10 ++--------
drivers/net/ethernet/mellanox/mlx4/en_tx.c | 9 +++------
drivers/nvdimm/dimm_devs.c | 5 +----
drivers/xen/evtchn.c | 14 +-------------
fs/btrfs/ctree.c | 9 +++------
fs/btrfs/ioctl.c | 9 +++------
fs/btrfs/send.c | 27 +++++++++------------------
fs/ceph/file.c | 9 +++------
fs/select.c | 5 +----
fs/xattr.c | 27 +++++++++------------------
lib/iov_iter.c | 5 +----
mm/frame_vector.c | 5 +----
net/netfilter/x_tables.c | 11 +----------
net/sched/sch_fq.c | 12 +-----------
net/sched/sch_netem.c | 6 +-----
net/sched/sch_sfq.c | 6 +-----
security/keys/keyctl.c | 22 ++++++----------------
22 files changed, 54 insertions(+), 171 deletions(-)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index bec71e902be3..ca590def234b 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1126,10 +1126,7 @@ static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
return -EINVAL;
- keys = kmalloc_array(args->count, sizeof(uint8_t),
- GFP_KERNEL | __GFP_NOWARN);
- if (!keys)
- keys = vmalloc(sizeof(uint8_t) * args->count);
+ keys = kvmalloc(args->count * sizeof(uint8_t), GFP_KERNEL);
if (!keys)
return -ENOMEM;
@@ -1171,10 +1168,7 @@ static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX)
return -EINVAL;
- keys = kmalloc_array(args->count, sizeof(uint8_t),
- GFP_KERNEL | __GFP_NOWARN);
- if (!keys)
- keys = vmalloc(sizeof(uint8_t) * args->count);
+ keys = kvmalloc(sizeof(uint8_t) * args->count, GFP_KERNEL);
if (!keys)
return -ENOMEM;
diff --git a/crypto/lzo.c b/crypto/lzo.c
index 168df784da84..218567d717d6 100644
--- a/crypto/lzo.c
+++ b/crypto/lzo.c
@@ -32,9 +32,7 @@ static void *lzo_alloc_ctx(struct crypto_scomp *tfm)
{
void *ctx;
- ctx = kmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL | __GFP_NOWARN);
- if (!ctx)
- ctx = vmalloc(LZO1X_MEM_COMPRESS);
+ ctx = kvmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
if (!ctx)
return ERR_PTR(-ENOMEM);
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index ec4f507b524f..a2898df61744 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -513,7 +513,7 @@ static int __erst_record_id_cache_add_one(void)
if (i < erst_record_id_cache.len)
goto retry;
if (erst_record_id_cache.len >= erst_record_id_cache.size) {
- int new_size, alloc_size;
+ int new_size;
u64 *new_entries;
new_size = erst_record_id_cache.size * 2;
@@ -524,11 +524,7 @@ static int __erst_record_id_cache_add_one(void)
pr_warn(FW_WARN "too many record IDs!\n");
return 0;
}
- alloc_size = new_size * sizeof(entries[0]);
- if (alloc_size < PAGE_SIZE)
- new_entries = kmalloc(alloc_size, GFP_KERNEL);
- else
- new_entries = vmalloc(alloc_size);
+ new_entries = kvmalloc(new_size * sizeof(entries[0]), GFP_KERNEL);
if (!new_entries)
return -ENOMEM;
memcpy(new_entries, entries,
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index f002fa5d1887..bdf418cac8ef 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -88,13 +88,7 @@ static int agp_get_key(void)
void agp_alloc_page_array(size_t size, struct agp_memory *mem)
{
- mem->pages = NULL;
-
- if (size <= 2*PAGE_SIZE)
- mem->pages = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);
- if (mem->pages == NULL) {
- mem->pages = vmalloc(size);
- }
+ mem->pages = kvmalloc(size, GFP_KERNEL);
}
EXPORT_SYMBOL(agp_alloc_page_array);
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
index 201b52b750dd..77dd73ff126f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -568,9 +568,7 @@ u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
size *= nmemb;
- mem = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);
- if (!mem)
- mem = vmalloc(size);
+ mem = kvmalloc(size, GFP_KERNEL);
if (!mem)
return ERR_PTR(-ENOMEM);
diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h
index cf2cbc211d83..9dc0f0ff0321 100644
--- a/drivers/md/bcache/util.h
+++ b/drivers/md/bcache/util.h
@@ -44,10 +44,7 @@ struct closure;
(heap)->size = (_size); \
_bytes = (heap)->size * sizeof(*(heap)->data); \
(heap)->data = NULL; \
- if (_bytes < KMALLOC_MAX_SIZE) \
- (heap)->data = kmalloc(_bytes, (gfp)); \
- if ((!(heap)->data) && ((gfp) & GFP_KERNEL)) \
- (heap)->data = vmalloc(_bytes); \
+ (heap)->data = kvmalloc(_bytes, (gfp) & GFP_KERNEL); \
(heap)->data; \
})
@@ -138,10 +135,7 @@ do { \
(fifo)->front = (fifo)->back = 0; \
(fifo)->data = NULL; \
\
- if (_bytes < KMALLOC_MAX_SIZE) \
- (fifo)->data = kmalloc(_bytes, (gfp)); \
- if ((!(fifo)->data) && ((gfp) & GFP_KERNEL)) \
- (fifo)->data = vmalloc(_bytes); \
+ (fifo)->data = kvmalloc(_bytes, (gfp) & GFP_KERNEL); \
(fifo)->data; \
})
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index 5886ad78058f..a5c1b815145e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -70,13 +70,10 @@ int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv,
ring->full_size = ring->size - HEADROOM - MAX_DESC_TXBBS;
tmp = size * sizeof(struct mlx4_en_tx_info);
- ring->tx_info = kmalloc_node(tmp, GFP_KERNEL | __GFP_NOWARN, node);
+ ring->tx_info = kvmalloc_node(tmp, GFP_KERNEL, node);
if (!ring->tx_info) {
- ring->tx_info = vmalloc(tmp);
- if (!ring->tx_info) {
- err = -ENOMEM;
- goto err_ring;
- }
+ err = -ENOMEM;
+ goto err_ring;
}
en_dbg(DRV, priv, "Allocated tx_info ring at addr:%p size:%d\n",
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index d614493ad5ac..a4e2af846d28 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -102,10 +102,7 @@ int nvdimm_init_config_data(struct nvdimm_drvdata *ndd)
return -ENXIO;
}
- ndd->data = kmalloc(ndd->nsarea.config_size, GFP_KERNEL);
- if (!ndd->data)
- ndd->data = vmalloc(ndd->nsarea.config_size);
-
+ ndd->data = kvmalloc(ndd->nsarea.config_size, GFP_KERNEL);
if (!ndd->data)
return -ENOMEM;
diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index e8c7f09d01be..9c97d0a24819 100644
--- a/drivers/xen/evtchn.c
+++ b/drivers/xen/evtchn.c
@@ -87,18 +87,6 @@ struct user_evtchn {
bool enabled;
};
-static evtchn_port_t *evtchn_alloc_ring(unsigned int size)
-{
- evtchn_port_t *ring;
- size_t s = size * sizeof(*ring);
-
- ring = kmalloc(s, GFP_KERNEL);
- if (!ring)
- ring = vmalloc(s);
-
- return ring;
-}
-
static void evtchn_free_ring(evtchn_port_t *ring)
{
kvfree(ring);
@@ -334,7 +322,7 @@ static int evtchn_resize_ring(struct per_user_data *u)
else
new_size = 2 * u->ring_size;
- new_ring = evtchn_alloc_ring(new_size);
+ new_ring = kvmalloc(new_size * sizeof(*new_ring), GFP_KERNEL);
if (!new_ring)
return -ENOMEM;
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 25286a5912fc..bebf4691a430 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -5369,13 +5369,10 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
goto out;
}
- tmp_buf = kmalloc(left_root->nodesize, GFP_KERNEL | __GFP_NOWARN);
+ tmp_buf = kvmalloc(left_root->nodesize, GFP_KERNEL);
if (!tmp_buf) {
- tmp_buf = vmalloc(left_root->nodesize);
- if (!tmp_buf) {
- ret = -ENOMEM;
- goto out;
- }
+ ret = -ENOMEM;
+ goto out;
}
left_path->search_commit_root = 1;
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 92b09a51742c..86e681db3cab 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3541,12 +3541,9 @@ static int btrfs_clone(struct inode *src, struct inode *inode,
u64 last_dest_end = destoff;
ret = -ENOMEM;
- buf = kmalloc(root->nodesize, GFP_KERNEL | __GFP_NOWARN);
- if (!buf) {
- buf = vmalloc(root->nodesize);
- if (!buf)
- return ret;
- }
+ buf = kvmalloc(root->nodesize, GFP_KERNEL);
+ if (!buf)
+ return ret;
path = btrfs_alloc_path();
if (!path) {
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 71261b459863..64f09f32b0d5 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -6243,22 +6243,16 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
sctx->clone_roots_cnt = arg->clone_sources_count;
sctx->send_max_size = BTRFS_SEND_BUF_SIZE;
- sctx->send_buf = kmalloc(sctx->send_max_size, GFP_KERNEL | __GFP_NOWARN);
+ sctx->send_buf = kvmalloc(sctx->send_max_size, GFP_KERNEL);
if (!sctx->send_buf) {
- sctx->send_buf = vmalloc(sctx->send_max_size);
- if (!sctx->send_buf) {
- ret = -ENOMEM;
- goto out;
- }
+ ret = -ENOMEM;
+ goto out;
}
- sctx->read_buf = kmalloc(BTRFS_SEND_READ_SIZE, GFP_KERNEL | __GFP_NOWARN);
+ sctx->read_buf = kvmalloc(BTRFS_SEND_READ_SIZE, GFP_KERNEL);
if (!sctx->read_buf) {
- sctx->read_buf = vmalloc(BTRFS_SEND_READ_SIZE);
- if (!sctx->read_buf) {
- ret = -ENOMEM;
- goto out;
- }
+ ret = -ENOMEM;
+ goto out;
}
sctx->pending_dir_moves = RB_ROOT;
@@ -6279,13 +6273,10 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
alloc_size = arg->clone_sources_count * sizeof(*arg->clone_sources);
if (arg->clone_sources_count) {
- clone_sources_tmp = kmalloc(alloc_size, GFP_KERNEL | __GFP_NOWARN);
+ clone_sources_tmp = kvmalloc(alloc_size, GFP_KERNEL);
if (!clone_sources_tmp) {
- clone_sources_tmp = vmalloc(alloc_size);
- if (!clone_sources_tmp) {
- ret = -ENOMEM;
- goto out;
- }
+ ret = -ENOMEM;
+ goto out;
}
ret = copy_from_user(clone_sources_tmp, arg->clone_sources,
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 921596eec664..74106e5f912a 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -74,12 +74,9 @@ dio_get_pages_alloc(const struct iov_iter *it, size_t nbytes,
align = (unsigned long)(it->iov->iov_base + it->iov_offset) &
(PAGE_SIZE - 1);
npages = calc_pages_for(align, nbytes);
- pages = kmalloc(sizeof(*pages) * npages, GFP_KERNEL);
- if (!pages) {
- pages = vmalloc(sizeof(*pages) * npages);
- if (!pages)
- return ERR_PTR(-ENOMEM);
- }
+ pages = kvmalloc(sizeof(*pages) * npages, GFP_KERNEL);
+ if (!pages)
+ return ERR_PTR(-ENOMEM);
for (idx = 0; idx < npages; ) {
size_t start;
diff --git a/fs/select.c b/fs/select.c
index 3d4f85defeab..175dd1b9b324 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -586,10 +586,7 @@ int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
goto out_nofds;
alloc_size = 6 * size;
- bits = kmalloc(alloc_size, GFP_KERNEL|__GFP_NOWARN);
- if (!bits && alloc_size > PAGE_SIZE)
- bits = vmalloc(alloc_size);
-
+ bits = kvmalloc(alloc_size, GFP_KERNEL);
if (!bits)
goto out_nofds;
}
diff --git a/fs/xattr.c b/fs/xattr.c
index 2d13b4e62fae..f3fb03a5b9b7 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -431,12 +431,9 @@ setxattr(struct dentry *d, const char __user *name, const void __user *value,
if (size) {
if (size > XATTR_SIZE_MAX)
return -E2BIG;
- kvalue = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);
- if (!kvalue) {
- kvalue = vmalloc(size);
- if (!kvalue)
- return -ENOMEM;
- }
+ kvalue = kvmalloc(size, GFP_KERNEL);
+ if (!kvalue)
+ return -ENOMEM;
if (copy_from_user(kvalue, value, size)) {
error = -EFAULT;
goto out;
@@ -528,12 +525,9 @@ getxattr(struct dentry *d, const char __user *name, void __user *value,
if (size) {
if (size > XATTR_SIZE_MAX)
size = XATTR_SIZE_MAX;
- kvalue = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
- if (!kvalue) {
- kvalue = vmalloc(size);
- if (!kvalue)
- return -ENOMEM;
- }
+ kvalue = kvmalloc(size, GFP_KERNEL);
+ if (!kvalue)
+ return -ENOMEM;
}
error = vfs_getxattr(d, kname, kvalue, size);
@@ -611,12 +605,9 @@ listxattr(struct dentry *d, char __user *list, size_t size)
if (size) {
if (size > XATTR_LIST_MAX)
size = XATTR_LIST_MAX;
- klist = kmalloc(size, __GFP_NOWARN | GFP_KERNEL);
- if (!klist) {
- klist = vmalloc(size);
- if (!klist)
- return -ENOMEM;
- }
+ klist = kvmalloc(size, GFP_KERNEL);
+ if (!klist)
+ return -ENOMEM;
}
error = vfs_listxattr(d, klist, size);
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 228892dabba6..710d9783a549 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -960,10 +960,7 @@ EXPORT_SYMBOL(iov_iter_get_pages);
static struct page **get_pages_array(size_t n)
{
- struct page **p = kmalloc(n * sizeof(struct page *), GFP_KERNEL);
- if (!p)
- p = vmalloc(n * sizeof(struct page *));
- return p;
+ return kvmalloc(n * sizeof(struct page *), GFP_KERNEL);
}
static ssize_t pipe_get_pages_alloc(struct iov_iter *i,
diff --git a/mm/frame_vector.c b/mm/frame_vector.c
index db77dcb38afd..72ebec18629c 100644
--- a/mm/frame_vector.c
+++ b/mm/frame_vector.c
@@ -200,10 +200,7 @@ struct frame_vector *frame_vector_create(unsigned int nr_frames)
* Avoid higher order allocations, use vmalloc instead. It should
* be rare anyway.
*/
- if (size <= PAGE_SIZE)
- vec = kmalloc(size, GFP_KERNEL);
- else
- vec = vmalloc(size);
+ vec = kvmalloc(size, GFP_KERNEL);
if (!vec)
return NULL;
vec->nr_allocated = nr_frames;
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index 2ff499680cc6..0a5cc1237afe 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -712,17 +712,8 @@ EXPORT_SYMBOL(xt_check_entry_offsets);
*/
unsigned int *xt_alloc_entry_offsets(unsigned int size)
{
- unsigned int *off;
+ return kvmalloc(size * sizeof(unsigned int), GFP_KERNEL);;
- off = kcalloc(size, sizeof(unsigned int), GFP_KERNEL | __GFP_NOWARN);
-
- if (off)
- return off;
-
- if (size < (SIZE_MAX / sizeof(unsigned int)))
- off = vmalloc(size * sizeof(unsigned int));
-
- return off;
}
EXPORT_SYMBOL(xt_alloc_entry_offsets);
diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c
index 86309a3156a5..5678eff40f61 100644
--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -624,16 +624,6 @@ static void fq_rehash(struct fq_sched_data *q,
q->stat_gc_flows += fcnt;
}
-static void *fq_alloc_node(size_t sz, int node)
-{
- void *ptr;
-
- ptr = kmalloc_node(sz, GFP_KERNEL | __GFP_REPEAT | __GFP_NOWARN, node);
- if (!ptr)
- ptr = vmalloc_node(sz, node);
- return ptr;
-}
-
static void fq_free(void *addr)
{
kvfree(addr);
@@ -650,7 +640,7 @@ static int fq_resize(struct Qdisc *sch, u32 log)
return 0;
/* If XPS was setup, we can allocate memory on right NUMA node */
- array = fq_alloc_node(sizeof(struct rb_root) << log,
+ array = kvmalloc_node(sizeof(struct rb_root) << log, GFP_KERNEL,
netdev_queue_numa_node_read(sch->dev_queue));
if (!array)
return -ENOMEM;
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 9f7b380cf0a3..ded4d4238ea2 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -692,15 +692,11 @@ static int get_dist_table(struct Qdisc *sch, const struct nlattr *attr)
spinlock_t *root_lock;
struct disttable *d;
int i;
- size_t s;
if (n > NETEM_DIST_MAX)
return -EINVAL;
- s = sizeof(struct disttable) + n * sizeof(s16);
- d = kmalloc(s, GFP_KERNEL | __GFP_NOWARN);
- if (!d)
- d = vmalloc(s);
+ d = kvmalloc(sizeof(struct disttable) + n * sizeof(s16), GFP_KERNEL);
if (!d)
return -ENOMEM;
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index 7f195ed4d568..5d70cd6a032d 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -684,11 +684,7 @@ static int sfq_change(struct Qdisc *sch, struct nlattr *opt)
static void *sfq_alloc(size_t sz)
{
- void *ptr = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN);
-
- if (!ptr)
- ptr = vmalloc(sz);
- return ptr;
+ return kvmalloc(sz, GFP_KERNEL);
}
static void sfq_free(void *addr)
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index e215e6d0c47c..186c975dba0c 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -99,14 +99,9 @@ SYSCALL_DEFINE5(add_key, const char __user *, _type,
if (_payload) {
ret = -ENOMEM;
- payload = kmalloc(plen, GFP_KERNEL | __GFP_NOWARN);
- if (!payload) {
- if (plen <= PAGE_SIZE)
- goto error2;
- payload = vmalloc(plen);
- if (!payload)
- goto error2;
- }
+ payload = kvmalloc(plen, GFP_KERNEL);
+ if (!payload)
+ goto error2;
ret = -EFAULT;
if (copy_from_user(payload, _payload, plen) != 0)
@@ -1064,14 +1059,9 @@ long keyctl_instantiate_key_common(key_serial_t id,
if (from) {
ret = -ENOMEM;
- payload = kmalloc(plen, GFP_KERNEL);
- if (!payload) {
- if (plen <= PAGE_SIZE)
- goto error;
- payload = vmalloc(plen);
- if (!payload)
- goto error;
- }
+ payload = kvmalloc(plen, GFP_KERNEL);
+ if (!payload)
+ goto error;
ret = -EFAULT;
if (!copy_from_iter_full(payload, plen, from))
--
2.11.0
--
Michal Hocko
SUSE Labs
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