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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-01-11 01:04:31 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-01-13 13:19:39 -0500 |
| commit | 0068c92a92707789b8711e40d584a2433481a29d (patch) | |
| tree | 311dd6449f4e3bd31ccd843ca36da0d342a85610 /init | |
| parent | c1a3c36017d4c4a4c61aa5f86704b7e80b92d3f7 (diff) | |
| download | linux-0068c92a92707789b8711e40d584a2433481a29d.tar.bz2 | |
init/main.c: Alloc initcall_command_line in do_initcall() and free it
Since initcall_command_line is used as a temporary buffer,
it could be freed after usage. Allocate it in do_initcall()
and free it after used.
Link: http://lkml.kernel.org/r/157867227145.17873.17513760552008505454.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/main.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/init/main.c b/init/main.c index 59c418a57f92..0b4e0c8ccf16 100644 --- a/init/main.c +++ b/init/main.c @@ -137,8 +137,6 @@ char __initdata boot_command_line[COMMAND_LINE_SIZE]; char *saved_command_line; /* Command line for parameter parsing */ static char *static_command_line; -/* Command line for per-initcall parameter parsing */ -static char *initcall_command_line; static char *execute_command; static char *ramdisk_execute_command; @@ -433,10 +431,6 @@ static void __init setup_command_line(char *command_line) if (!saved_command_line) panic("%s: Failed to allocate %zu bytes\n", __func__, len); - initcall_command_line = memblock_alloc(len, SMP_CACHE_BYTES); - if (!initcall_command_line) - panic("%s: Failed to allocate %zu bytes\n", __func__, len); - static_command_line = memblock_alloc(len, SMP_CACHE_BYTES); if (!static_command_line) panic("%s: Failed to allocate %zu bytes\n", __func__, len); @@ -1044,13 +1038,12 @@ static const char *initcall_level_names[] __initdata = { "late", }; -static void __init do_initcall_level(int level) +static void __init do_initcall_level(int level, char *command_line) { initcall_entry_t *fn; - strcpy(initcall_command_line, saved_command_line); parse_args(initcall_level_names[level], - initcall_command_line, __start___param, + command_line, __start___param, __stop___param - __start___param, level, level, NULL, &repair_env_string); @@ -1063,9 +1056,20 @@ static void __init do_initcall_level(int level) static void __init do_initcalls(void) { int level; + size_t len = strlen(saved_command_line) + 1; + char *command_line; + + command_line = kzalloc(len, GFP_KERNEL); + if (!command_line) + panic("%s: Failed to allocate %zu bytes\n", __func__, len); + + for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++) { + /* Parser modifies command_line, restore it each time */ + strcpy(command_line, saved_command_line); + do_initcall_level(level, command_line); + } - for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++) - do_initcall_level(level); + kfree(command_line); } /* |