diff options
| author | Stefan Brüns | 2016-09-11 22:51:42 +0200 |
|---|---|---|
| committer | Tom Rini | 2016-09-23 08:55:58 -0400 |
| commit | 454e3d90302d52b619e6df7ebbe716964cee016e (patch) | |
| tree | 0a3b6842212e744950922c66cf48d65870350e60 | |
| parent | ae1755be37e3d51af631ff2df12189c9fdc3e1d7 (diff) | |
cmd/fat: Do not crash on write when <bytes> is not specified
argc is checked, but is off by one. In case <bytes> is not specified,
create an empty file, which is identical to the ext4write behaviour.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | cmd/fat.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/cmd/fat.c b/cmd/fat.c index 4e207462d93..ad1dc2a49f1 100644 --- a/cmd/fat.c +++ b/cmd/fat.c @@ -126,7 +126,7 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag, return 1; } addr = simple_strtoul(argv[3], NULL, 16); - count = simple_strtoul(argv[5], NULL, 16); + count = (argc <= 5) ? 0 : simple_strtoul(argv[5], NULL, 16); buf = map_sysmem(addr, count); ret = file_fat_write(argv[4], buf, 0, count, &size); @@ -145,7 +145,7 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag, U_BOOT_CMD( fatwrite, 6, 0, do_fat_fswrite, "write file into a dos filesystem", - "<interface> <dev[:part]> <addr> <filename> <bytes>\n" + "<interface> <dev[:part]> <addr> <filename> [<bytes>]\n" " - write file 'filename' from the address 'addr' in RAM\n" " to 'dev' on 'interface'" ); |