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authorLinus Torvalds <torvalds@linux-foundation.org>2011-11-28 11:27:57 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-28 11:27:57 -0800
commitcb3599926e3e7b3678583195effa61a03026ab0e (patch)
tree775419d69e8732ba3f4933d3b7a07e98ae555458 /drivers
parent4244cb482e8eab18142162a27c8829a04585863a (diff)
parentf6f8285132907757ef84ef8dae0a1244b8cde6ac (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: pstore: pass allocated memory region back to caller
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/apei/erst.c31
-rw-r--r--drivers/firmware/efivars.c9
2 files changed, 29 insertions, 11 deletions
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 127408069ca..631b9477b99 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -932,7 +932,8 @@ static int erst_check_table(struct acpi_table_erst *erst_tab)
static int erst_open_pstore(struct pstore_info *psi);
static int erst_close_pstore(struct pstore_info *psi);
static ssize_t erst_reader(u64 *id, enum pstore_type_id *type,
- struct timespec *time, struct pstore_info *psi);
+ struct timespec *time, char **buf,
+ struct pstore_info *psi);
static int erst_writer(enum pstore_type_id type, u64 *id, unsigned int part,
size_t size, struct pstore_info *psi);
static int erst_clearer(enum pstore_type_id type, u64 id,
@@ -986,17 +987,23 @@ static int erst_close_pstore(struct pstore_info *psi)
}
static ssize_t erst_reader(u64 *id, enum pstore_type_id *type,
- struct timespec *time, struct pstore_info *psi)
+ struct timespec *time, char **buf,
+ struct pstore_info *psi)
{
int rc;
ssize_t len = 0;
u64 record_id;
- struct cper_pstore_record *rcd = (struct cper_pstore_record *)
- (erst_info.buf - sizeof(*rcd));
+ struct cper_pstore_record *rcd;
+ size_t rcd_len = sizeof(*rcd) + erst_info.bufsize;
if (erst_disable)
return -ENODEV;
+ rcd = kmalloc(rcd_len, GFP_KERNEL);
+ if (!rcd) {
+ rc = -ENOMEM;
+ goto out;
+ }
skip:
rc = erst_get_record_id_next(&reader_pos, &record_id);
if (rc)
@@ -1004,22 +1011,27 @@ skip:
/* no more record */
if (record_id == APEI_ERST_INVALID_RECORD_ID) {
- rc = -1;
+ rc = -EINVAL;
goto out;
}
- len = erst_read(record_id, &rcd->hdr, sizeof(*rcd) +
- erst_info.bufsize);
+ len = erst_read(record_id, &rcd->hdr, rcd_len);
/* The record may be cleared by others, try read next record */
if (len == -ENOENT)
goto skip;
- else if (len < 0) {
- rc = -1;
+ else if (len < sizeof(*rcd)) {
+ rc = -EIO;
goto out;
}
if (uuid_le_cmp(rcd->hdr.creator_id, CPER_CREATOR_PSTORE) != 0)
goto skip;
+ *buf = kmalloc(len, GFP_KERNEL);
+ if (*buf == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ memcpy(*buf, rcd->data, len - sizeof(*rcd));
*id = record_id;
if (uuid_le_cmp(rcd->sec_hdr.section_type,
CPER_SECTION_TYPE_DMESG) == 0)
@@ -1037,6 +1049,7 @@ skip:
time->tv_nsec = 0;
out:
+ kfree(rcd);
return (rc < 0) ? rc : (len - sizeof(*rcd));
}
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index 8370f72d87f..a54a6b972ce 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -457,7 +457,8 @@ static int efi_pstore_close(struct pstore_info *psi)
}
static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
- struct timespec *timespec, struct pstore_info *psi)
+ struct timespec *timespec,
+ char **buf, struct pstore_info *psi)
{
efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
struct efivars *efivars = psi->data;
@@ -478,7 +479,11 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
timespec->tv_nsec = 0;
get_var_data_locked(efivars, &efivars->walk_entry->var);
size = efivars->walk_entry->var.DataSize;
- memcpy(psi->buf, efivars->walk_entry->var.Data, size);
+ *buf = kmalloc(size, GFP_KERNEL);
+ if (*buf == NULL)
+ return -ENOMEM;
+ memcpy(*buf, efivars->walk_entry->var.Data,
+ size);
efivars->walk_entry = list_entry(efivars->walk_entry->list.next,
struct efivar_entry, list);
return size;