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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-15 12:51:50 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-15 12:51:50 -0800
commit75e300c8ba5864367634d946c729d8fd05c1cbc2 (patch)
tree2ccbc619f482d453d18e5162649e3c2e7162673c /fs/pstore/ram.c
parentc13e69b2f0e1e2da41a175c7e9215659842cbef9 (diff)
parentebacfd1ece3bfa46296fc92c6f996cb5f7fc75e6 (diff)
Merge tag 'for-v3.8' of git://git.infradead.org/users/cbou/linux-pstore
Pull pstore update from Anton Vorontsov: "Here are just a few fixups for the pstore subsystem, nothing special this time" * tag 'for-v3.8' of git://git.infradead.org/users/cbou/linux-pstore: pstore/ftrace: Adjust for ftrace_ops->func prototype change pstore/ram: Fix bounds checks for mem_size, record_size, console_size and ftrace_size pstore/ram: Fix undefined usage of rounddown_pow_of_two(0) pstore/ram: Fixup section annotations
Diffstat (limited to 'fs/pstore/ram.c')
-rw-r--r--fs/pstore/ram.c42
1 files changed, 31 insertions, 11 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 2bfa36e0ffe8..f883e7e74305 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -188,7 +188,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
struct pstore_info *psi)
{
struct ramoops_context *cxt = psi->data;
- struct persistent_ram_zone *prz = cxt->przs[cxt->dump_write_cnt];
+ struct persistent_ram_zone *prz;
size_t hlen;
if (type == PSTORE_TYPE_CONSOLE) {
@@ -225,6 +225,11 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
if (part != 1)
return -ENOSPC;
+ if (!cxt->przs)
+ return -ENOSPC;
+
+ prz = cxt->przs[cxt->dump_write_cnt];
+
hlen = ramoops_write_kmsg_hdr(prz);
if (size + hlen > prz->buffer_size)
size = prz->buffer_size - hlen;
@@ -286,8 +291,9 @@ static void ramoops_free_przs(struct ramoops_context *cxt)
kfree(cxt->przs);
}
-static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
- phys_addr_t *paddr, size_t dump_mem_sz)
+static int __devinit ramoops_init_przs(struct device *dev,
+ struct ramoops_context *cxt,
+ phys_addr_t *paddr, size_t dump_mem_sz)
{
int err = -ENOMEM;
int i;
@@ -295,6 +301,11 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
if (!cxt->record_size)
return 0;
+ if (*paddr + dump_mem_sz - cxt->phys_addr > cxt->size) {
+ dev_err(dev, "no room for dumps\n");
+ return -ENOMEM;
+ }
+
cxt->max_dump_cnt = dump_mem_sz / cxt->record_size;
if (!cxt->max_dump_cnt)
return -ENOMEM;
@@ -325,15 +336,20 @@ fail_prz:
return err;
}
-static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
- struct persistent_ram_zone **prz,
- phys_addr_t *paddr, size_t sz, u32 sig)
+static int __devinit ramoops_init_prz(struct device *dev,
+ struct ramoops_context *cxt,
+ struct persistent_ram_zone **prz,
+ phys_addr_t *paddr, size_t sz, u32 sig)
{
if (!sz)
return 0;
- if (*paddr + sz > *paddr + cxt->size)
+ if (*paddr + sz - cxt->phys_addr > cxt->size) {
+ dev_err(dev, "no room for mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
+ sz, (unsigned long long)*paddr,
+ cxt->size, (unsigned long long)cxt->phys_addr);
return -ENOMEM;
+ }
*prz = persistent_ram_new(*paddr, sz, sig, cxt->ecc_size);
if (IS_ERR(*prz)) {
@@ -373,10 +389,14 @@ static int __devinit ramoops_probe(struct platform_device *pdev)
goto fail_out;
}
- pdata->mem_size = rounddown_pow_of_two(pdata->mem_size);
- pdata->record_size = rounddown_pow_of_two(pdata->record_size);
- pdata->console_size = rounddown_pow_of_two(pdata->console_size);
- pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size);
+ if (!is_power_of_2(pdata->mem_size))
+ pdata->mem_size = rounddown_pow_of_two(pdata->mem_size);
+ if (!is_power_of_2(pdata->record_size))
+ pdata->record_size = rounddown_pow_of_two(pdata->record_size);
+ if (!is_power_of_2(pdata->console_size))
+ pdata->console_size = rounddown_pow_of_two(pdata->console_size);
+ if (!is_power_of_2(pdata->ftrace_size))
+ pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size);
cxt->dump_read_cnt = 0;
cxt->size = pdata->mem_size;