ExternalVendorCode/openwrt
1
0
Fork 0
mirror of https://github.com/openwrt/openwrt.git synced 2024-12-24 07:46:48 +00:00
Code Issues Actions 5 Packages Projects Releases Wiki Activity

kernel: 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: 9c718b5478 ("kernel: bump 4.14 to 4.14.200")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
(backported from commit 223eec7e81)
This commit is contained in:
Sven Eckelmann 2020-11-22 01:17:35 +01:00
parent 193adc94d1
commit b4698d87c8
1 changed files with 63 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
target/linux/generic/pending-4.14/499-mtd-parser-cmdline-Fix-parsing-of-part-names-with-co.patch Normal file
View File

@ -0,0 +1,63 @@
From: Sven Eckelmann <sven@narfation.org>
Date: Sun, 22 Nov 2020 00:48:33 +0100
Subject: [PATCH RFC] mtd: parser: cmdline: Fix parsing of part-names with colons
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.
Forwarded: https://patchwork.ozlabs.org/project/linux-mtd/patch/20201122001533.985641-1-sven@narfation.org/
Fixes: eb13fa022741 ("mtd: parser: cmdline: Support MTD names containing one or more colons")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
diff --git a/drivers/mtd/cmdlinepart.c b/drivers/mtd/cmdlinepart.c
index 0625b25620ca766318ea4646a6e3761ff4d3a4cc..22881ea4c132ea5a5ba7aebd025d91bf1cd023af 100644
--- a/drivers/mtd/cmdlinepart.c
+++ b/drivers/mtd/cmdlinepart.c
@@ -218,7 +218,7 @@ 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
@@ -228,6 +228,13 @@ 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;
/*
@@ -237,6 +244,10 @@ static int mtdpart_setup_real(char *s)
*/
p = strrchr(s, ':');
+ /* Restore the '(' now. */
+ if (open_parenth)
+ *open_parenth = '(';
+
/* Restore the ';' now. */
if (semicol)
*semicol = ';';