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| author | Laura Abbott <labbott@fedoraproject.org> | 2015-09-01 15:03:08 -0700 |
|---|---|---|
| committer | Laura Abbott <labbott@fedoraproject.org> | 2015-09-01 15:59:56 -0700 |
| commit | d07b889185195409a6090ed3e12fff475b4258f4 (patch) | |
| tree | c2b98784a9c45c2ba5420c4a256c03d1c1c2e125 /ACPI-Limit-access-to-custom_method.patch | |
| parent | 07775e21b6d0c7b9c2251deb8cb5ef3052a38c6e (diff) | |
| download | kernel-d07b889185195409a6090ed3e12fff475b4258f4.tar.gz kernel-d07b889185195409a6090ed3e12fff475b4258f4.tar.xz kernel-d07b889185195409a6090ed3e12fff475b4258f4.zip | |
Linux v4.2
This is a squashed patch of the history from F22 + the 4.2 rebase
Diffstat (limited to 'ACPI-Limit-access-to-custom_method.patch')
| -rw-r--r-- | ACPI-Limit-access-to-custom_method.patch | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/ACPI-Limit-access-to-custom_method.patch b/ACPI-Limit-access-to-custom_method.patch new file mode 100644 index 000000000..88709a324 --- /dev/null +++ b/ACPI-Limit-access-to-custom_method.patch @@ -0,0 +1,27 @@ +From: Matthew Garrett <matthew.garrett@nebula.com> +Date: Fri, 9 Mar 2012 08:39:37 -0500 +Subject: [PATCH] ACPI: Limit access to custom_method + +custom_method effectively allows arbitrary access to system memory, making +it possible for an attacker to circumvent restrictions on module loading. +Disable it if any such restrictions have been enabled. + +Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com> +--- + drivers/acpi/custom_method.c | 3 +++ + 1 file changed, 3 insertions(+) + +diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c +index c68e72414a67..4277938af700 100644 +--- a/drivers/acpi/custom_method.c ++++ b/drivers/acpi/custom_method.c +@@ -29,6 +29,9 @@ static ssize_t cm_write(struct file *file, const char __user * user_buf, + struct acpi_table_header table; + acpi_status status; + ++ if (secure_modules()) ++ return -EPERM; ++ + if (!(*ppos)) { + /* parse the table header to get the table length */ + if (count <= sizeof(struct acpi_table_header)) |