efb375b579
Refresh patches Fixes: CVE-2017-5754 aka Meltdown Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk> [fix typo in commit msg, conflict after 4.14 bump] Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
58 lines
1.5 KiB
Diff
58 lines
1.5 KiB
Diff
--- a/init/main.c
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+++ b/init/main.c
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@@ -356,6 +356,29 @@ 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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@@ -529,6 +552,7 @@ 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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--- a/init/Kconfig
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+++ b/init/Kconfig
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@@ -1648,6 +1648,15 @@ 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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