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author | Mike Rapoport <rppt@linux.ibm.com> | 2019-03-11 23:30:20 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-12 10:04:02 -0700 |
commit | f5c7310ac73ea270e3a1acdb73d1b4817f11fd67 (patch) | |
tree | d19aea85e65218534d418466922d73d1847bee24 /init/main.c | |
parent | f655f40537916d4b1d6d1a023a778697c75a4fe2 (diff) | |
download | linux-f5c7310ac73ea270e3a1acdb73d1b4817f11fd67.tar.gz linux-f5c7310ac73ea270e3a1acdb73d1b4817f11fd67.tar.bz2 linux-f5c7310ac73ea270e3a1acdb73d1b4817f11fd67.zip |
init/main: add checks for the return value of memblock_alloc*()
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/1548057848-15136-18-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Guo Ren <ren_guo@c-sky.com> [c-sky]
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Juergen Gross <jgross@suse.com> [Xen]
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init/main.c')
-rw-r--r-- | init/main.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/init/main.c b/init/main.c index c86a1c8f19f4..598e278b46f7 100644 --- a/init/main.c +++ b/init/main.c @@ -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); } |