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69050f8d6d
This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook <kees@kernel.org>
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ceph/ceph_debug.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/ceph/buffer.h>
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#include <linux/ceph/decode.h>
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#include <linux/ceph/libceph.h> /* for kvmalloc */
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struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
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{
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struct ceph_buffer *b;
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b = kmalloc_obj(*b, gfp);
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if (!b)
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return NULL;
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b->vec.iov_base = kvmalloc(len, gfp);
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if (!b->vec.iov_base) {
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kfree(b);
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return NULL;
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}
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kref_init(&b->kref);
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b->alloc_len = len;
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b->vec.iov_len = len;
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dout("buffer_new %p\n", b);
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return b;
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}
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EXPORT_SYMBOL(ceph_buffer_new);
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void ceph_buffer_release(struct kref *kref)
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{
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struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
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dout("buffer_release %p\n", b);
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kvfree(b->vec.iov_base);
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kfree(b);
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}
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EXPORT_SYMBOL(ceph_buffer_release);
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int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end)
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{
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size_t len;
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ceph_decode_need(p, end, sizeof(u32), bad);
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len = ceph_decode_32(p);
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dout("decode_buffer len %d\n", (int)len);
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ceph_decode_need(p, end, len, bad);
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*b = ceph_buffer_new(len, GFP_NOFS);
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if (!*b)
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return -ENOMEM;
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ceph_decode_copy(p, (*b)->vec.iov_base, len);
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return 0;
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bad:
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return -EINVAL;
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}
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