Yinghai Lu 2d3862d26e lib/decompressors: use real out buf size for gunzip with kernel ... 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>		2015-09-10 13:29:01 -07:00
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boot	lib/decompressors: use real out buf size for gunzip with kernel	2015-09-10 13:29:01 -07:00
configs	USB: delete CONFIG_USB_DEVICEFS from defconfig	2014-05-27 16:07:13 -07:00
include	mm: move __phys_to_pfn and __pfn_to_phys to asm/generic/memory_model.h	2015-08-27 19:40:58 -04:00
kernel	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-09-01 14:33:35 -07:00
lib	unicore32: fix build error for find bitops	2011-11-15 17:13:14 +08:00
mm	mm/fault, arch: Use pagefault_disable() to check for disabled pagefaults in the handler	2015-05-19 08:39:15 +02:00
.gitignore	unicore32 core architecture: build infrastructure	2011-03-17 09:19:05 +08:00
Kconfig	unicore32: Remove ARCH_HAS_CPUFREQ config option	2014-06-20 08:22:41 +08:00
Kconfig.debug	unicore32: drop unused Kconfig symbols	2011-11-15 17:13:18 +08:00
Makefile	unicore32: Use generic init_task	2012-05-05 13:00:26 +02:00