The patch titled
Subject: initrd: Fix lz4 decompress with initrd
has been added to the -mm tree. Its filename is
initrd-fix-lz4-decompress-with-initrd.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/initrd-fix-lz4-decompress-with-initrd.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/initrd-fix-lz4-decompress-with-initrd.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Yinghai Lu <yinghai@xxxxxxxxxx>
Subject: initrd: Fix lz4 decompress with initrd
During testing initrd (>2G) support, find decompress/lz4 does not work
with initrd at all.
decompress_* should support:
1. inbuf[]/outbuf[] for kernel preboot.
2. inbuf[]/flush() for initramfs
3. fill()/flush() for initrd.
in the unlz4 does not handle case 3, as input len is passed as 0, and it
failed in first try.
Fix that add one extra if (fill) checking, and get out if EOF from the
fill().
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Kyungsik Lee <kyungsik.lee@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/decompress_unlz4.c | 65 +++++++++++++++++++++++++--------------
1 file changed, 43 insertions(+), 22 deletions(-)
diff -puN lib/decompress_unlz4.c~initrd-fix-lz4-decompress-with-initrd lib/decompress_unlz4.c
--- a/lib/decompress_unlz4.c~initrd-fix-lz4-decompress-with-initrd
+++ a/lib/decompress_unlz4.c
@@ -83,13 +83,20 @@ STATIC inline int INIT unlz4(u8 *input,
if (posp)
*posp = 0;
- if (fill)
- fill(inp, 4);
+ if (fill) {
+ size = fill(inp, 4);
+ if (size < 4) {
+ error("data corrupted");
+ goto exit_2;
+ }
+ }
chunksize = get_unaligned_le32(inp);
if (chunksize == ARCHIVE_MAGICNUMBER) {
- inp += 4;
- size -= 4;
+ if (!fill) {
+ inp += 4;
+ size -= 4;
+ }
} else {
error("invalid header");
goto exit_2;
@@ -100,29 +107,44 @@ STATIC inline int INIT unlz4(u8 *input,
for (;;) {
- if (fill)
- fill(inp, 4);
+ if (fill) {
+ size = fill(inp, 4);
+ if (size == 0)
+ break;
+ if (size < 4) {
+ error("data corrupted");
+ goto exit_2;
+ }
+ }
chunksize = get_unaligned_le32(inp);
if (chunksize == ARCHIVE_MAGICNUMBER) {
- inp += 4;
- size -= 4;
+ if (!fill) {
+ inp += 4;
+ size -= 4;
+ }
if (posp)
*posp += 4;
continue;
}
- inp += 4;
- size -= 4;
+
if (posp)
*posp += 4;
- if (fill) {
+ if (!fill) {
+ inp += 4;
+ size -= 4;
+ } else {
if (chunksize > lz4_compressbound(uncomp_chunksize)) {
error("chunk length is longer than allocated");
goto exit_2;
}
- fill(inp, chunksize);
+ size = fill(inp, chunksize);
+ if (size < chunksize) {
+ error("data corrupted");
+ goto exit_2;
+ }
}
#ifdef PREBOOT
if (out_len >= uncomp_chunksize) {
@@ -149,18 +171,17 @@ STATIC inline int INIT unlz4(u8 *input,
if (posp)
*posp += chunksize;
- size -= chunksize;
+ if (!fill) {
+ size -= chunksize;
- if (size == 0)
- break;
- else if (size < 0) {
- error("data corrupted");
- goto exit_2;
+ if (size == 0)
+ break;
+ else if (size < 0) {
+ error("data corrupted");
+ goto exit_2;
+ }
+ inp += chunksize;
}
-
- inp += chunksize;
- if (fill)
- inp = inp_start;
}
ret = 0;
_
Patches currently in -mm which might be from yinghai@xxxxxxxxxx are
mem-hotplug-improve-zone_movable_is_highmem-logic.patch
initrd-fix-lz4-decompress-with-initrd.patch
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