3.19.8-ckt8 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Yinghai Lu <[email protected]> commit 2d3862d26e67a59340ba1cf1748196c76c5787de upstream. 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: 1431574a1c4 (lib/decompressors: fix "no limit" output buffer length) Signed-off-by: Yinghai Lu <[email protected]> Cc: Alexandre Courbot <[email protected]> Cc: Jon Medhurst <[email protected]> Cc: Stephen Warren <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> [ kamal: backport to 3.19-stable: no arch/h8300/ ] Signed-off-by: Kamal Mostafa <[email protected]> --- arch/arm/boot/compressed/decompress.c | 2 +- arch/m32r/boot/compressed/misc.c | 3 ++- arch/mips/boot/compressed/decompress.c | 4 ++-- arch/s390/boot/compressed/misc.c | 2 +- arch/sh/boot/compressed/misc.c | 2 +- arch/unicore32/boot/compressed/misc.c | 4 ++-- arch/x86/boot/compressed/misc.c | 3 ++- lib/decompress_bunzip2.c | 6 +++--- lib/decompress_inflate.c | 31 ++++++++++++++++++++++++++----- lib/decompress_unlz4.c | 6 +++--- lib/decompress_unlzma.c | 7 +++---- lib/decompress_unlzo.c | 13 ++++++++++++- lib/decompress_unxz.c | 12 +++++++++++- 13 files changed, 69 insertions(+), 26 deletions(-) diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c index bd245d3..a0765e7 100644 --- a/arch/arm/boot/compressed/decompress.c +++ b/arch/arm/boot/compressed/decompress.c @@ -57,5 +57,5 @@ extern char * strstr(const char * s1, const char *s2); int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)) { - return decompress(input, len, NULL, NULL, output, NULL, error); + return __decompress(input, len, NULL, NULL, output, 0, NULL, error); } diff --git a/arch/m32r/boot/compressed/misc.c b/arch/m32r/boot/compressed/misc.c index 28a0952..3a76927 100644 --- a/arch/m32r/boot/compressed/misc.c +++ b/arch/m32r/boot/compressed/misc.c @@ -86,6 +86,7 @@ decompress_kernel(int mmu_on, unsigned char *zimage_data, free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE; puts("\nDecompressing Linux... "); - decompress(input_data, input_len, NULL, NULL, output_data, NULL, error); + __decompress(input_data, input_len, NULL, NULL, output_data, 0, + NULL, error); puts("done.\nBooting the kernel.\n"); } diff --git a/arch/mips/boot/compressed/decompress.c b/arch/mips/boot/compressed/decompress.c index 31903cf..0c6f024 100644 --- a/arch/mips/boot/compressed/decompress.c +++ b/arch/mips/boot/compressed/decompress.c @@ -106,8 +106,8 @@ void decompress_kernel(unsigned long boot_heap_start) puts("\n"); /* Decompress the kernel with according algorithm */ - decompress((char *)zimage_start, zimage_size, 0, 0, - (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error); + __decompress((char *)zimage_start, zimage_size, 0, 0, + (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error); /* FIXME: should we flush cache here? */ puts("Now, booting the kernel...\n"); diff --git a/arch/s390/boot/compressed/misc.c b/arch/s390/boot/compressed/misc.c index 57cbaff..cca4e1a 100644 --- a/arch/s390/boot/compressed/misc.c +++ b/arch/s390/boot/compressed/misc.c @@ -168,7 +168,7 @@ unsigned long decompress_kernel(void) #endif puts("Uncompressing Linux... "); - decompress(input_data, input_len, NULL, NULL, output, NULL, error); + __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error); puts("Ok, booting the kernel.\n"); return (unsigned long) output; } diff --git a/arch/sh/boot/compressed/misc.c b/arch/sh/boot/compressed/misc.c index 95470a4..208a975 100644 --- a/arch/sh/boot/compressed/misc.c +++ b/arch/sh/boot/compressed/misc.c @@ -132,7 +132,7 @@ void decompress_kernel(void) puts("Uncompressing Linux... "); cache_control(CACHE_ENABLE); - decompress(input_data, input_len, NULL, NULL, output, NULL, error); + __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error); cache_control(CACHE_DISABLE); puts("Ok, booting the kernel.\n"); } diff --git a/arch/unicore32/boot/compressed/misc.c b/arch/unicore32/boot/compressed/misc.c index 176d5bd..5c65dfe 100644 --- a/arch/unicore32/boot/compressed/misc.c +++ b/arch/unicore32/boot/compressed/misc.c @@ -119,8 +119,8 @@ unsigned long decompress_kernel(unsigned long output_start, output_ptr = get_unaligned_le32(tmp); arch_decomp_puts("Uncompressing Linux..."); - decompress(input_data, input_data_end - input_data, NULL, NULL, - output_data, NULL, error); + __decompress(input_data, input_data_end - input_data, NULL, NULL, + output_data, 0, NULL, error); arch_decomp_puts(" done, booting the kernel.\n"); return output_ptr; } diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index a950864..5cc9593 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -421,7 +421,8 @@ asmlinkage __visible void *decompress_kernel(void *rmode, memptr heap, #endif debug_putstr("\nDecompressing Linux... "); - decompress(input_data, input_len, NULL, NULL, output, NULL, error); + __decompress(input_data, input_len, NULL, NULL, output, output_len, + NULL, error); parse_elf(output); /* * 32-bit always performs relocations. 64-bit relocations are only diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c index 6dd0335..0234361 100644 --- a/lib/decompress_bunzip2.c +++ b/lib/decompress_bunzip2.c @@ -743,12 +743,12 @@ exit_0: } #ifdef PREBOOT -STATIC int INIT decompress(unsigned char *buf, long len, +STATIC int INIT __decompress(unsigned char *buf, long len, long (*fill)(void*, unsigned long), long (*flush)(void*, unsigned long), - unsigned char *outbuf, + unsigned char *outbuf, long olen, long *pos, - void(*error)(char *x)) + void (*error)(char *x)) { return bunzip2(buf, len - 4, fill, flush, outbuf, pos, error); } diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c index d4c7891..555c06b 100644 --- a/lib/decompress_inflate.c +++ b/lib/decompress_inflate.c @@ -1,4 +1,5 @@ #ifdef STATIC +#define PREBOOT /* Pre-boot environment: included */ /* prevent inclusion of _LINUX_KERNEL_H in pre-boot environment: lots @@ -33,23 +34,23 @@ static long INIT nofill(void *buffer, unsigned long len) } /* Included from initramfs et al code */ -STATIC int INIT gunzip(unsigned char *buf, long len, +STATIC int INIT __gunzip(unsigned char *buf, long len, long (*fill)(void*, unsigned long), long (*flush)(void*, unsigned long), - unsigned char *out_buf, + unsigned char *out_buf, long out_len, long *pos, void(*error)(char *x)) { u8 *zbuf; struct z_stream_s *strm; int rc; - size_t out_len; rc = -1; if (flush) { out_len = 0x8000; /* 32 K */ out_buf = malloc(out_len); } else { - out_len = ((size_t)~0) - (size_t)out_buf; /* no limit */ + if (!out_len) + out_len = ((size_t)~0) - (size_t)out_buf; /* no limit */ } if (!out_buf) { error("Out of memory while allocating output buffer"); @@ -181,4 +182,24 @@ gunzip_nomem1: return rc; /* returns Z_OK (0) if successful */ } -#define decompress gunzip +#ifndef PREBOOT +STATIC int INIT gunzip(unsigned char *buf, long len, + long (*fill)(void*, unsigned long), + long (*flush)(void*, unsigned long), + unsigned char *out_buf, + long *pos, + void (*error)(char *x)) +{ + return __gunzip(buf, len, fill, flush, out_buf, 0, pos, error); +} +#else +STATIC int INIT __decompress(unsigned char *buf, long len, + long (*fill)(void*, unsigned long), + long (*flush)(void*, unsigned long), + unsigned char *out_buf, long out_len, + long *pos, + void (*error)(char *x)) +{ + return __gunzip(buf, len, fill, flush, out_buf, out_len, pos, error); +} +#endif diff --git a/lib/decompress_unlz4.c b/lib/decompress_unlz4.c index 40f66eb..036fc88 100644 --- a/lib/decompress_unlz4.c +++ b/lib/decompress_unlz4.c @@ -196,12 +196,12 @@ exit_0: } #ifdef PREBOOT -STATIC int INIT decompress(unsigned char *buf, long in_len, +STATIC int INIT __decompress(unsigned char *buf, long in_len, long (*fill)(void*, unsigned long), long (*flush)(void*, unsigned long), - unsigned char *output, + unsigned char *output, long out_len, long *posp, - void(*error)(char *x) + void (*error)(char *x) ) { return unlz4(buf, in_len - 4, fill, flush, output, posp, error); diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c index 0be83af..decb646 100644 --- a/lib/decompress_unlzma.c +++ b/lib/decompress_unlzma.c @@ -667,13 +667,12 @@ exit_0: } #ifdef PREBOOT -STATIC int INIT decompress(unsigned char *buf, long in_len, +STATIC int INIT __decompress(unsigned char *buf, long in_len, long (*fill)(void*, unsigned long), long (*flush)(void*, unsigned long), - unsigned char *output, + unsigned char *output, long out_len, long *posp, - void(*error)(char *x) - ) + void (*error)(char *x)) { return unlzma(buf, in_len - 4, fill, flush, output, posp, error); } diff --git a/lib/decompress_unlzo.c b/lib/decompress_unlzo.c index b94a31b..f4c158e 100644 --- a/lib/decompress_unlzo.c +++ b/lib/decompress_unlzo.c @@ -31,6 +31,7 @@ */ #ifdef STATIC +#define PREBOOT #include "lzo/lzo1x_decompress_safe.c" #else #include <linux/decompress/unlzo.h> @@ -287,4 +288,14 @@ exit: return ret; } -#define decompress unlzo +#ifdef PREBOOT +STATIC int INIT __decompress(unsigned char *buf, long len, + long (*fill)(void*, unsigned long), + long (*flush)(void*, unsigned long), + unsigned char *out_buf, long olen, + long *pos, + void (*error)(char *x)) +{ + return unlzo(buf, len, fill, flush, out_buf, pos, error); +} +#endif diff --git a/lib/decompress_unxz.c b/lib/decompress_unxz.c index b07a783..25d59a9 100644 --- a/lib/decompress_unxz.c +++ b/lib/decompress_unxz.c @@ -394,4 +394,14 @@ error_alloc_state: * This macro is used by architecture-specific files to decompress * the kernel image. */ -#define decompress unxz +#ifdef XZ_PREBOOT +STATIC int INIT __decompress(unsigned char *buf, long len, + long (*fill)(void*, unsigned long), + long (*flush)(void*, unsigned long), + unsigned char *out_buf, long olen, + long *pos, + void (*error)(char *x)) +{ + return unxz(buf, len, fill, flush, out_buf, pos, error); +} +#endif -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
