mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 06:26:49 +07:00
2d3862d26e
When loading x86 64bit kernel above 4GiB with patched grub2, got kernel
gunzip error.
| early console in decompress_kernel
| decompress_kernel:
| input: [0x807f2143b4-0x807ff61aee]
| output: [0x807cc00000-0x807f3ea29b] 0x027ea29c: output_len
| boot via startup_64
| KASLR using RDTSC...
| new output: [0x46fe000000-0x470138cfff] 0x0338d000: output_run_size
| decompress: [0x46fe000000-0x47007ea29b] <=== [0x807f2143b4-0x807ff61aee]
|
| Decompressing Linux... gz...
|
| uncompression error
|
| -- System halted
the new buffer is at 0x46fe000000ULL, decompressor_gzip is using
0xffffffb901ffffff as out_len. gunzip in lib/zlib_inflate/inflate.c cap
that len to 0x01ffffff and decompress fails later.
We could hit this problem with crashkernel booting that uses kexec loading
kernel above 4GiB.
We have decompress_* support:
1. inbuf[]/outbuf[] for kernel preboot.
2. inbuf[]/flush() for initramfs
3. fill()/flush() for initrd.
This bug only affect kernel preboot path that use outbuf[].
Add __decompress and take real out_buf_len for gunzip instead of guessing
wrong buf size.
Fixes: 1431574a1c (lib/decompressors: fix "no limit" output buffer length)
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: Jon Medhurst <tixy@linaro.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
#define _LINUX_STRING_H_
|
|
|
|
#include <linux/compiler.h> /* for inline */
|
|
#include <linux/types.h> /* for size_t */
|
|
#include <linux/stddef.h> /* for NULL */
|
|
#include <linux/linkage.h>
|
|
#include <asm/string.h>
|
|
|
|
extern unsigned long free_mem_ptr;
|
|
extern unsigned long free_mem_end_ptr;
|
|
extern void error(char *);
|
|
|
|
#define STATIC static
|
|
#define STATIC_RW_DATA /* non-static please */
|
|
|
|
/* Diagnostic functions */
|
|
#ifdef DEBUG
|
|
# define Assert(cond,msg) {if(!(cond)) error(msg);}
|
|
# define Trace(x) fprintf x
|
|
# define Tracev(x) {if (verbose) fprintf x ;}
|
|
# define Tracevv(x) {if (verbose>1) fprintf x ;}
|
|
# define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
|
|
# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
|
|
#else
|
|
# define Assert(cond,msg)
|
|
# define Trace(x)
|
|
# define Tracev(x)
|
|
# define Tracevv(x)
|
|
# define Tracec(c,x)
|
|
# define Tracecv(c,x)
|
|
#endif
|
|
|
|
/* Not needed, but used in some headers pulled in by decompressors */
|
|
extern char * strstr(const char * s1, const char *s2);
|
|
|
|
#ifdef CONFIG_KERNEL_GZIP
|
|
#include "../../../../lib/decompress_inflate.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_LZO
|
|
#include "../../../../lib/decompress_unlzo.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_LZMA
|
|
#include "../../../../lib/decompress_unlzma.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_XZ
|
|
#define memmove memmove
|
|
#define memcpy memcpy
|
|
#include "../../../../lib/decompress_unxz.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_LZ4
|
|
#include "../../../../lib/decompress_unlz4.c"
|
|
#endif
|
|
|
|
int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
|
|
{
|
|
return __decompress(input, len, NULL, NULL, output, 0, NULL, error);
|
|
}
|