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init/main: add checks for the return value of memblock_alloc*()

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Add panic() calls if memblock_alloc() returns NULL.

The panic() format duplicates the one used by memblock itself and in
order to avoid explosion with long parameters list replace open coded
allocation size calculations with a local variable.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Mike Rapoport <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Dennis Zhou <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Greentime Hu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Guo Ren <[email protected]>				[c-sky]
Cc: Heiko Carstens <[email protected]>
Cc: Juergen Gross <[email protected]>			[Xen]
Cc: Mark Salter <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Paul Burton <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Russell King <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Mike Rapoport authored and Linus Torvalds committed 2019-03-12 10:04:02 -07:00
1 parent f655f40537
commit f5c7310ac7
1 file changed
+20 -6
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init/main.c
+20 -6
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@@ -373,12 +373,20 @@ static inline void smp_prepare_cpus(unsigned int maxcpus) { }
*/
static void __init setup_command_line(char *command_line)
{
saved_command_line =
memblock_alloc(strlen(boot_command_line) + 1, SMP_CACHE_BYTES);
initcall_command_line =
memblock_alloc(strlen(boot_command_line) + 1, SMP_CACHE_BYTES);
static_command_line = memblock_alloc(strlen(command_line) + 1,
SMP_CACHE_BYTES);
size_t len = strlen(boot_command_line) + 1;
saved_command_line = memblock_alloc(len, SMP_CACHE_BYTES);
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);
strcpy(saved_command_line, boot_command_line);
strcpy(static_command_line, command_line);
}
@@ -770,8 +778,14 @@ static int __init initcall_blacklist(char *str)
pr_debug("blacklisting initcall %s\n", str_entry);
entry = memblock_alloc(sizeof(*entry),
SMP_CACHE_BYTES);
if (!entry)
panic("%s: Failed to allocate %zu bytes\n",
__func__, sizeof(*entry));
entry->buf = memblock_alloc(strlen(str_entry) + 1,
SMP_CACHE_BYTES);
if (!entry->buf)
panic("%s: Failed to allocate %zu bytes\n",
__func__, strlen(str_entry) + 1);
strcpy(entry->buf, str_entry);
list_add(&entry->next, &blacklisted_initcalls);
}