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3921756dee
Coverity complains about a possible memory corruption in the
nvme_ns_attach and _detach functions. While we should not (famous last
words) be able to reach this function without nsid having previously
been validated, this is still an open door for future misuse.
Make Coverity and maintainers happy by asserting that the index into the
array is valid. Also, while not detected by Coverity (yet), add an
assert in nvme_subsys_ns and nvme_subsys_register_ns as well since a
similar issue is exists there.
Fixes: 037953b5b2 ("hw/block/nvme: support namespace detach")
Fixes: CID 1450757
Fixes: CID 1450758
Cc: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* QEMU NVM Express Subsystem: nvme-subsys
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*
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* Copyright (c) 2021 Minwoo Im <minwoo.im.dev@gmail.com>
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*
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* This code is licensed under the GNU GPL v2. Refer COPYING.
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*/
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#ifndef NVME_SUBSYS_H
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#define NVME_SUBSYS_H
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#define TYPE_NVME_SUBSYS "nvme-subsys"
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#define NVME_SUBSYS(obj) \
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OBJECT_CHECK(NvmeSubsystem, (obj), TYPE_NVME_SUBSYS)
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#define NVME_SUBSYS_MAX_CTRLS 32
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#define NVME_SUBSYS_MAX_NAMESPACES 256
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typedef struct NvmeCtrl NvmeCtrl;
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typedef struct NvmeNamespace NvmeNamespace;
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typedef struct NvmeSubsystem {
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DeviceState parent_obj;
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uint8_t subnqn[256];
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NvmeCtrl *ctrls[NVME_SUBSYS_MAX_CTRLS];
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/* Allocated namespaces for this subsystem */
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NvmeNamespace *namespaces[NVME_SUBSYS_MAX_NAMESPACES + 1];
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struct {
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char *nqn;
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} params;
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} NvmeSubsystem;
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int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp);
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int nvme_subsys_register_ns(NvmeNamespace *ns, Error **errp);
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static inline NvmeCtrl *nvme_subsys_ctrl(NvmeSubsystem *subsys,
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uint32_t cntlid)
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{
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if (!subsys) {
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return NULL;
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}
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return subsys->ctrls[cntlid];
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}
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/*
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* Return allocated namespace of the specified nsid in the subsystem.
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*/
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static inline NvmeNamespace *nvme_subsys_ns(NvmeSubsystem *subsys,
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uint32_t nsid)
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{
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if (!subsys) {
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return NULL;
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}
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assert(nsid && nsid <= NVME_SUBSYS_MAX_NAMESPACES);
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return subsys->namespaces[nsid];
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}
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#endif /* NVME_SUBSYS_H */
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