Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 03/17] efi: fix return value of __setup handlers | Date | Mon, 21 Mar 2022 14:52:39 +0100 |
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From: Randy Dunlap <rdunlap@infradead.org>
[ Upstream commit 9feaf8b387ee0ece9c1d7add308776b502a35d0c ]
When "dump_apple_properties" is used on the kernel boot command line, it causes an Unknown parameter message and the string is added to init's argument strings:
Unknown kernel command line parameters "dump_apple_properties BOOT_IMAGE=/boot/bzImage-517rc6 efivar_ssdt=newcpu_ssdt", will be passed to user space.
Run /sbin/init as init process with arguments: /sbin/init dump_apple_properties with environment: HOME=/ TERM=linux BOOT_IMAGE=/boot/bzImage-517rc6 efivar_ssdt=newcpu_ssdt
Similarly when "efivar_ssdt=somestring" is used, it is added to the Unknown parameter message and to init's environment strings, polluting them (see examples above).
Change the return value of the __setup functions to 1 to indicate that the __setup options have been handled.
Fixes: 58c5475aba67 ("x86/efi: Retrieve and assign Apple device properties") Fixes: 475fb4e8b2f4 ("efi / ACPI: load SSTDs from EFI variables") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru> Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Cc: Ard Biesheuvel <ardb@kernel.org> Cc: linux-efi@vger.kernel.org Cc: Lukas Wunner <lukas@wunner.de> Cc: Octavian Purdila <octavian.purdila@intel.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Link: https://lore.kernel.org/r/20220301041851.12459-1-rdunlap@infradead.org Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/firmware/efi/apple-properties.c | 2 +- drivers/firmware/efi/efi.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/efi/apple-properties.c b/drivers/firmware/efi/apple-properties.c index 0e206c9e0d7a..7ad2d85d7270 100644 --- a/drivers/firmware/efi/apple-properties.c +++ b/drivers/firmware/efi/apple-properties.c @@ -23,7 +23,7 @@ static bool dump_properties __initdata; static int __init dump_properties_enable(char *arg) { dump_properties = true; - return 0; + return 1; } __setup("dump_apple_properties", dump_properties_enable); diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 415d7b3a59f8..8fd74a7501d4 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -231,7 +231,7 @@ static int __init efivar_ssdt_setup(char *str) memcpy(efivar_ssdt, str, strlen(str)); else pr_warn("efivar_ssdt: name too long: %s\n", str); - return 0; + return 1; } __setup("efivar_ssdt=", efivar_ssdt_setup); -- 2.34.1
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