kernel: 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.
Fixes: 5d01d05608 ("kernel: Update kernel 4.14 to version 4.14.202")
Fixes: edda06c7b4 ("kernel: Update kernel 4.9 to version 4.9.240")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
(backported from commit 223eec7e81)
This commit is contained in:
Sven Eckelmann
parent
0e25552dd8
commit
9f2a40c72f
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From: Sven Eckelmann <sven@narfation.org>
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Date: Sun, 22 Nov 2020 00:48:33 +0100
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Subject: [PATCH RFC] mtd: parser: cmdline: Fix parsing of part-names with colons
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Some devices (especially QCA ones) are already using hardcoded partition
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names with colons in it. The OpenMesh A62 for example provides following
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mtd relevant information via cmdline:
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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
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The change to split only on the last colon between mtd-id and partitions
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will cause newpart to see following string for the first partition:
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KEYS),0x002b0000(kernel),0x00c80000(rootfs),15552k(inactive)
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Such a partition list cannot be parsed and thus the device fails to boot.
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Avoid this behavior by making sure that the start of the first part-name
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("(") will also be the last byte the mtd-id split algorithm is using for
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its colon search.
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Forwarded: https://patchwork.ozlabs.org/project/linux-mtd/patch/20201122001533.985641-1-sven@narfation.org/
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Fixes: eb13fa022741 ("mtd: parser: cmdline: Support MTD names containing one or more colons")
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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diff --git a/drivers/mtd/cmdlinepart.c b/drivers/mtd/cmdlinepart.c
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index 0625b25620ca766318ea4646a6e3761ff4d3a4cc..22881ea4c132ea5a5ba7aebd025d91bf1cd023af 100644
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--- a/drivers/mtd/cmdlinepart.c
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+++ b/drivers/mtd/cmdlinepart.c
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@@ -218,7 +218,7 @@ static int mtdpart_setup_real(char *s)
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struct cmdline_mtd_partition *this_mtd;
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struct mtd_partition *parts;
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int mtd_id_len, num_parts;
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- char *p, *mtd_id, *semicol;
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+ char *p, *mtd_id, *semicol, *open_parenth;
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/*
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* Replace the first ';' by a NULL char so strrchr can work
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@@ -228,6 +228,13 @@ static int mtdpart_setup_real(char *s)
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if (semicol)
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*semicol = '\0';
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+ /* make sure that part-names with ":" will not be handled as
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+ * part of the mtd-id with an ":"
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+ */
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+ open_parenth = strchr(s, '(');
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+ if (open_parenth)
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+ *open_parenth = '\0';
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+
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mtd_id = s;
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/*
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@@ -237,6 +244,10 @@ static int mtdpart_setup_real(char *s)
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*/
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p = strrchr(s, ':');
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+ /* Restore the '(' now. */
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+ if (open_parenth)
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+ *open_parenth = '(';
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+
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/* Restore the ';' now. */
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if (semicol)
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*semicol = ';';
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@ -0,0 +1,63 @@
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From: Sven Eckelmann <sven@narfation.org>
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Date: Sun, 22 Nov 2020 00:48:33 +0100
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Subject: [PATCH RFC] mtd: parser: cmdline: Fix parsing of part-names with colons
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Some devices (especially QCA ones) are already using hardcoded partition
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names with colons in it. The OpenMesh A62 for example provides following
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mtd relevant information via cmdline:
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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
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The change to split only on the last colon between mtd-id and partitions
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will cause newpart to see following string for the first partition:
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KEYS),0x002b0000(kernel),0x00c80000(rootfs),15552k(inactive)
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Such a partition list cannot be parsed and thus the device fails to boot.
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Avoid this behavior by making sure that the start of the first part-name
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("(") will also be the last byte the mtd-id split algorithm is using for
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its colon search.
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Forwarded: https://patchwork.ozlabs.org/project/linux-mtd/patch/20201122001533.985641-1-sven@narfation.org/
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Fixes: eb13fa022741 ("mtd: parser: cmdline: Support MTD names containing one or more colons")
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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diff --git a/drivers/mtd/cmdlinepart.c b/drivers/mtd/cmdlinepart.c
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index 0625b25620ca766318ea4646a6e3761ff4d3a4cc..22881ea4c132ea5a5ba7aebd025d91bf1cd023af 100644
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--- a/drivers/mtd/cmdlinepart.c
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+++ b/drivers/mtd/cmdlinepart.c
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@@ -218,7 +218,7 @@ static int mtdpart_setup_real(char *s)
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struct cmdline_mtd_partition *this_mtd;
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struct mtd_partition *parts;
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int mtd_id_len, num_parts;
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- char *p, *mtd_id, *semicol;
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+ char *p, *mtd_id, *semicol, *open_parenth;
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/*
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* Replace the first ';' by a NULL char so strrchr can work
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@@ -228,6 +228,13 @@ static int mtdpart_setup_real(char *s)
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if (semicol)
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*semicol = '\0';
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+ /* make sure that part-names with ":" will not be handled as
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+ * part of the mtd-id with an ":"
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+ */
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+ open_parenth = strchr(s, '(');
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+ if (open_parenth)
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+ *open_parenth = '\0';
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+
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mtd_id = s;
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/*
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@@ -237,6 +244,10 @@ static int mtdpart_setup_real(char *s)
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*/
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p = strrchr(s, ':');
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+ /* Restore the '(' now. */
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+ if (open_parenth)
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+ *open_parenth = '(';
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+
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/* Restore the ';' now. */
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if (semicol)
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*semicol = ';';
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