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dmi updates for v6.10

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* KCFI violation fix for dmi-id.
 * Stop decoding on broken (short) DMI table entry.
 * Print info about populated memory slots at boot.
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Merge tag 'dmi-for-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging

Pull dmi updates from Jean Delvare:
 "Bug fixes:

   - KCFI violation in dmi-id

   - stop decoding on broken (short) DMI table entry

  New features:

   - print info about populated memory slots at boot"

* tag 'dmi-for-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  firmware: dmi: Add info message for number of populated and total memory slots
  firmware: dmi: Stop decoding on broken entry
  firmware: dmi-id: add a release callback function
This commit is contained in:
Linus Torvalds 2024-05-20 09:23:36 -07:00
commit 80f9d90230
2 changed files with 23 additions and 1 deletions
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7
drivers/firmware/dmi-id.c
View File

@ -169,9 +169,14 @@ static int dmi_dev_uevent(const struct device *dev, struct kobj_uevent_env *env)
return 0;
}
static void dmi_dev_release(struct device *dev)
{
kfree(dev);
}
static struct class dmi_class = {
.name = "dmi",
.dev_release = (void(*)(struct device *)) kfree,
.dev_release = dmi_dev_release,
.dev_uevent = dmi_dev_uevent,
};

17
drivers/firmware/dmi_scan.c
View File

@ -42,6 +42,7 @@ static struct dmi_memdev_info {
u8 type; /* DDR2, DDR3, DDR4 etc */
} *dmi_memdev;
static int dmi_memdev_nr;
static int dmi_memdev_populated_nr __initdata;
static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
{
@ -101,6 +102,17 @@ static void dmi_decode_table(u8 *buf,
(data - buf + sizeof(struct dmi_header)) <= dmi_len) {
const struct dmi_header *dm = (const struct dmi_header *)data;
/*
* If a short entry is found (less than 4 bytes), not only it
* is invalid, but we cannot reliably locate the next entry.
*/
if (dm->length < sizeof(struct dmi_header)) {
pr_warn(FW_BUG
"Corrupted DMI table, offset %zd (only %d entries processed)\n",
data - buf, i);
break;
}
/*
* We want to know the total length (formatted area and
* strings) before decoding to make sure we won't run off the
@ -448,6 +460,9 @@ static void __init save_mem_devices(const struct dmi_header *dm, void *v)
else
bytes = (u64)get_unaligned((u32 *)&d[0x1C]) << 20;
if (bytes)
dmi_memdev_populated_nr++;
dmi_memdev[nr].size = bytes;
nr++;
}
@ -824,6 +839,8 @@ void __init dmi_setup(void)
return;
dmi_memdev_walk();
pr_info("DMI: Memory slots populated: %d/%d\n",
dmi_memdev_populated_nr, dmi_memdev_nr);
dump_stack_set_arch_desc("%s", dmi_ids_string);
}