From 6024ede9ba84aa1b891c2d6bc98eda07801235e5 Mon Sep 17 00:00:00 2001 From: Jim Keniston Date: Thu, 11 Nov 2010 18:54:27 +0000 Subject: [PATCH] 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 Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/nvram_64.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c index b8a50fa5875..bb12b3248f1 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) {