Bug 4616

Summary:	dd: invalid number when too big
Product:	Busybox	Reporter:	mikolaj
Component:	Standard Compliance	Assignee:	unassigned
Status:	RESOLVED WONTFIX
Severity:	minor	CC:	busybox-cvs
Priority:	P5
Version:	unspecified
Target Milestone:	---
Hardware:	PC
OS:	Linux
Host:		Target:
Build:

Description mikolaj 2011-12-14 17:12:22 UTC

This is a report for busybox in RHEL 5.7 installer. As I think the issue is
more related to busybox than RHELs installer, I'm reporting it here.


Sorry I don't have access to newer version of busybox, to check does the issue
exist in newer versions.


When I supply to big number dd(1) command fails with error 'invalid number' however it doesn't happen to dd(1) version from coreutils.



-sh-3.2# grep -e 'sda$' /proc/partitions
   8     0   35566479 sda

-sh-3.2# dd --help
BusyBox v1.2.0 (2011.07.22-08:19+0000) multi-call binary


-sh-3.2# dd if=/dev/zero of=/dev/sda seek=36411452416 count=8622592 bs=1
dd: invalid number `36411452416'



I did some testing here, but not sure at what number exactly it fails:



-sh-3.2# dd if=/dev/zero of=/dev/sda seek=5000000000 count=0 bs=1
dd: invalid number `5000000000'
-sh-3.2# dd if=/dev/zero of=/dev/sda seek=4000000000 count=0 bs=1
0+0 records in
0+0 records out
-sh-3.2#

Comment 1 Denys Vlasenko 2011-12-15 23:42:54 UTC

busybox-1.2.x internally use strtoul() to parse numbers fin dd options. Therefore they can't accept numbers larger than 2^32-1.

1.2.x is VERY old. Newer versions don't have this limitation.

Looks like WONTFIX to me...