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authorSven Eckelmann <sven@narfation.org>2020-11-22 01:17:35 +0100
committerPetr Štetiar <ynezz@true.cz>2020-11-23 22:53:15 +0100
commit223eec7e81f8506592fc89cf79a2f14360f5c57b (patch)
tree590c6553650ede4551199ff834773a81d335dbda /target
parent8231994d3f027725224651532210af36ae5c59ab (diff)
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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: d6a9a92e3217 ("kernel: bump 5.4 to 5.4.69") Signed-off-by: Sven Eckelmann <sven@narfation.org>
Diffstat (limited to 'target')
-rw-r--r--target/linux/generic/pending-5.4/499-mtd-parser-cmdline-Fix-parsing-of-part-names-with-co.patch63
1 files changed, 63 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.4/499-mtd-parser-cmdline-Fix-parsing-of-part-names-with-co.patch b/target/linux/generic/pending-5.4/499-mtd-parser-cmdline-Fix-parsing-of-part-names-with-co.patch
new file mode 100644
index 0000000000..33b7ee3cfe
--- /dev/null
+++ b/target/linux/generic/pending-5.4/499-mtd-parser-cmdline-Fix-parsing-of-part-names-with-co.patch
@@ -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/parsers/cmdlinepart.c b/drivers/mtd/parsers/cmdlinepart.c
+index 0625b25620ca766318ea4646a6e3761ff4d3a4cc..22881ea4c132ea5a5ba7aebd025d91bf1cd023af 100644
+--- a/drivers/mtd/parsers/cmdlinepart.c
++++ b/drivers/mtd/parsers/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 = ';';