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| author | Jim Keniston <jkenisto@us.ibm.com> | 2010-11-11 21:54:27 +0300 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-11-30 07:43:51 +0300 |
| commit | 6024ede9ba84aa1b891c2d6bc98eda07801235e5 (patch) | |
| tree | fa7a2c4c991ae4b5d3b083944394a4e0ecf02591 /arch/powerpc/kernel/nvram_64.c | |
| parent | 690d1a9bd14bd861328ca66473a223f60cf1ad31 (diff) | |
| download | linux-6024ede9ba84aa1b891c2d6bc98eda07801235e5.tar.xz | |
powerpc/nvram: Handle partition names >= 12 chars
The name field in the nvram_header can be < 12 chars, null-terminated,
or 12 chars without the null. Handle this safely.
Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/nvram_64.c')
| -rw-r--r-- | arch/powerpc/kernel/nvram_64.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c index b8a50fa5875b..bb12b3248f13 100644 --- a/arch/powerpc/kernel/nvram_64.c +++ b/arch/powerpc/kernel/nvram_64.c @@ -42,6 +42,7 @@ struct nvram_header { unsigned char signature; unsigned char checksum; unsigned short length; + /* Terminating null required only for names < 12 chars. */ char name[12]; }; @@ -201,7 +202,7 @@ static void __init nvram_print_partitions(char * label) printk(KERN_WARNING "--------%s---------\n", label); printk(KERN_WARNING "indx\t\tsig\tchks\tlen\tname\n"); list_for_each_entry(tmp_part, &nvram_partitions, partition) { - printk(KERN_WARNING "%4d \t%02x\t%02x\t%d\t%s\n", + printk(KERN_WARNING "%4d \t%02x\t%02x\t%d\t%12s\n", tmp_part->index, tmp_part->header.signature, tmp_part->header.checksum, tmp_part->header.length, tmp_part->header.name); @@ -256,7 +257,7 @@ int __init nvram_remove_partition(const char *name, int sig) /* Make partition a free partition */ part->header.signature = NVRAM_SIG_FREE; - sprintf(part->header.name, "wwwwwwwwwwww"); + strncpy(part->header.name, "wwwwwwwwwwww", 12); part->header.checksum = nvram_checksum(&part->header); rc = nvram_write_header(part); if (rc <= 0) { |