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cmd_nand: fix crashing bug in nand read/write

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Commit 418396e212 introduced a
bug that causes nand read and nand write to crash in strcmp
due to a null pointer.

Root cause is that strchr(cmd, '.') returns a null pointer when
the input string does not contain a '.'

The strcmp function does not check for null pointers, resulting
in a crash.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Scott Wood <scott@tyr.buserror.net>
This commit is contained in:
Steve Sakoman 2012-06-07 10:19:18 -07:00 committed by Scott Wood
parent fedab338f3
commit 8d75c8964b
1 changed files with 1 additions and 1 deletions
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2
common/cmd_nand.c
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@ -617,7 +617,7 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
s = strchr(cmd, '.');
if (!strcmp(s, ".raw")) {
if (s && !strcmp(s, ".raw")) {
raw = 1;
if (arg_off(argv[3], &dev, &off, &size))