Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-09-21 15:33:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

mtd: parser: cmdline: Fix parsing of part-names with colons

Browse Source 
Some devices (especially QCA ones) are already using hardcoded partition
names with colons in it. The OpenMesh A62 for example provides following
mtd relevant information via cmdline:

  root=31:11 mtdparts=spi0.0:256k(0:SBL1),128k(0:MIBIB),384k(0:QSEE),64k(0:CDT),64k(0:DDRPARAMS),64k(0:APPSBLENV),512k(0:APPSBL),64k(0:ART),64k(custom),64k(0:KEYS),0x002b0000(kernel),0x00c80000(rootfs),15552k(inactive) rootfsname=rootfs rootwait

The change to split only on the last colon between mtd-id and partitions
will cause newpart to see following string for the first partition:

  KEYS),0x002b0000(kernel),0x00c80000(rootfs),15552k(inactive)

Such a partition list cannot be parsed and thus the device fails to boot.

Avoid this behavior by making sure that the start of the first part-name
("(") will also be the last byte the mtd-id split algorithm is using for
its colon search.

Fixes: eb13fa0227 ("mtd: parser: cmdline: Support MTD names containing one or more colons")
Cc: stable@vger.kernel.org
Cc: Ron Minnich <rminnich@google.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20201124062506.185392-1-sven@narfation.org
This commit is contained in:
Sven Eckelmann 2020-11-24 07:25:06 +01:00 committed by Miquel Raynal
parent 22ca56a34b
commit 639a82434f
1 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/mtd/parsers/cmdlinepart.c
View File

@ -226,7 +226,7 @@ static int mtdpart_setup_real(char *s)
struct cmdline_mtd_partition *this_mtd;
struct mtd_partition *parts;
int mtd_id_len, num_parts;
char *p, *mtd_id, *semicol;
char *p, *mtd_id, *semicol, *open_parenth;
/*
* Replace the first ';' by a NULL char so strrchr can work
@ -236,6 +236,14 @@ static int mtdpart_setup_real(char *s)
if (semicol)
*semicol = '\0';
/*
* make sure that part-names with ":" will not be handled as
* part of the mtd-id with an ":"
*/
open_parenth = strchr(s, '(');
if (open_parenth)
*open_parenth = '\0';
mtd_id = s;
/*
@ -245,6 +253,10 @@ static int mtdpart_setup_real(char *s)
*/
p = strrchr(s, ':');
/* Restore the '(' now. */
if (open_parenth)
*open_parenth = '(';
/* Restore the ';' now. */
if (semicol)
*semicol = ';';