2d02a4f5bd
Refresh patches. Adapt 704-phy-no-genphy-soft-reset.patch. Remove brcm2708/950-0005-mm-Remove-the-PFN-busy-warning.patch. Compile-tested on brcm2708/bcm2708 and x86/64. Runtime-tested on brcm2708/bcm2708 and x86/64. Fixes the following vulnerabilities: - CVE-2017-7533 - CVE-2017-1000111 - CVE-2017-1000112 Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
71 lines
1.9 KiB
Diff
71 lines
1.9 KiB
Diff
From: Imre Kaloz <kaloz@openwrt.org>
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Subject: init: add CONFIG_MANGLE_BOOTARGS and disable it by default
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Enabling this option renames the bootloader supplied root=
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and rootfstype= variables, which might have to be know but
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would break the automatisms OpenWrt uses.
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Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
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---
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init/Kconfig | 9 +++++++++
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init/main.c | 24 ++++++++++++++++++++++++
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2 files changed, 33 insertions(+)
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--- a/init/Kconfig
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+++ b/init/Kconfig
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@@ -1687,6 +1687,15 @@ config EMBEDDED
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an embedded system so certain expert options are available
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for configuration.
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+config MANGLE_BOOTARGS
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+ bool "Rename offending bootargs"
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+ depends on EXPERT
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+ help
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+ Sometimes the bootloader passed bogus root= and rootfstype=
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+ parameters to the kernel, and while you want to ignore them,
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+ you need to know the values f.e. to support dual firmware
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+ layouts on the flash.
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+
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config HAVE_PERF_EVENTS
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bool
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help
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--- a/init/main.c
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+++ b/init/main.c
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@@ -352,6 +352,29 @@ static inline void setup_nr_cpu_ids(void
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static inline void smp_prepare_cpus(unsigned int maxcpus) { }
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#endif
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+#ifdef CONFIG_MANGLE_BOOTARGS
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+static void __init mangle_bootargs(char *command_line)
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+{
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+ char *rootdev;
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+ char *rootfs;
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+
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+ rootdev = strstr(command_line, "root=/dev/mtdblock");
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+
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+ if (rootdev)
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+ strncpy(rootdev, "mangled_rootblock=", 18);
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+
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+ rootfs = strstr(command_line, "rootfstype");
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+
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+ if (rootfs)
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+ strncpy(rootfs, "mangled_fs", 10);
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+
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+}
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+#else
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+static void __init mangle_bootargs(char *command_line)
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+{
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+}
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+#endif
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+
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/*
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* We need to store the untouched command line for future reference.
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* We also need to store the touched command line since the parameter
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@@ -504,6 +527,7 @@ asmlinkage __visible void __init start_k
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pr_notice("%s", linux_banner);
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setup_arch(&command_line);
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mm_init_cpumask(&init_mm);
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+ mangle_bootargs(command_line);
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setup_command_line(command_line);
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setup_nr_cpu_ids();
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setup_per_cpu_areas();
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