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| author |   Takashi Iwai <tiwai@suse.de> | 2020-03-11 08:09:58 +0100 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-03-14 11:15:10 +0100 |
| commit | edd66086449cdc2763d14afc65cd2023bf37306a (patch) | |
| tree | 6d1060a8d1d244f8d6494a705b539045a0471fe0 /drivers/acpi | |
| parent | Linux 5.6-rc5 (diff) | |
| download | linux-dev-edd66086449cdc2763d14afc65cd2023bf37306a.tar.xz linux-dev-edd66086449cdc2763d14afc65cd2023bf37306a.zip | |
ACPI: PCI: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit. Fix it by replacing with scnprintf().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/pci_root.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index d1e666ef3fcc..f92df2533e7e 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -153,7 +153,7 @@ static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word, buf[0] = '\0'; for (i = 0, entry = table; i < size; i++, entry++) if (word & entry->bit) - len += snprintf(buf + len, sizeof(buf) - len, "%s%s", + len += scnprintf(buf + len, sizeof(buf) - len, "%s%s", len ? " " : "", entry->desc); dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf); |