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linux/arch/x86/lib
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Yann Droneaud 324e82a335 perf/x86: Fix copy_from_user_nmi() return if range is not ok 
commit ebf2d2689d upstream.

Commit 0a196848ca ("perf: Fix arch_perf_out_copy_user default"),
changes copy_from_user_nmi() to return the number of
remaining bytes so that it behave like copy_from_user().

Unfortunately, when the range is outside of the process
memory, the return value  is still the number of byte
copied, eg. 0, instead of the remaining bytes.

As all users of copy_from_user_nmi() were modified as
part of commit 0a196848ca, the function should be
fixed to return the total number of bytes if range is
not correct.

Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1435001923-30986-1-git-send-email-ydroneaud@opteya.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
History 2015-09-30 13:20:53 +01:00
..
.gitignore x86: Gitignore: arch/x86/lib/inat-tables.c 2009-11-04 13:11:28 +01:00
atomic64_32.c x86: Adjust asm constraints in atomic64 wrappers 2012-01-20 17:29:31 -08:00
atomic64_386_32.S x86: atomic64 assembly improvements 2012-01-20 17:29:49 -08:00
atomic64_cx8_32.S x86: atomic64 assembly improvements 2012-01-20 17:29:49 -08:00
cache-smp.c x86, lib: Add wbinvd smp helpers 2010-01-22 16:05:42 -08:00
checksum_32.S x86/lib: Fix spelling, put space between a numeral and its units 2013-04-15 11:40:32 +02:00
clear_page_64.S x86, mem: clear_page_64.S: Support clear_page() with enhanced REP MOVSB/STOSB 2011-05-17 15:40:27 -07:00
cmdline.c x86, boot: Carve out early cmdline parsing function 2014-05-20 20:21:24 -07:00
cmpxchg8b_emu.S x86: Provide an alternative() based cmpxchg64() 2009-09-30 22:55:59 +02:00
cmpxchg16b_emu.S percpu: Omit segment prefix in the UP case for cmpxchg_double 2011-03-27 19:25:36 -07:00
copy_page_64.S x86/asm: Clean up copy_page_*() comments and code 2012-10-24 12:42:47 +02:00
copy_user_64.S x86-64, copy_user: Use leal to produce 32-bit results 2013-11-20 13:57:07 -08:00
copy_user_nocache_64.S x86, smap: Add STAC and CLAC instructions to control user space access 2012-09-21 12:45:27 -07:00
csum-copy_64.S x86, extable: Remove open-coded exception table entries in arch/x86/lib/csum-copy_64.S 2012-04-20 13:51:39 -07:00
csum-partial_64.c x86: Fix common misspellings 2011-03-18 10:39:30 +01:00
csum-wrappers_64.c x86, smap: Handle csum_partial_copy_*_user() 2013-09-01 14:09:48 -07:00
delay.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
getuser.S x86: Be consistent with data size in getuser.S 2013-02-11 23:14:48 -08:00
hash.c x86, hash: Simplify switch, add __init annotation 2014-03-19 16:51:04 -07:00
inat.c x86: Fix to decode grouped AVX with VEX pp bits 2012-02-11 15:11:35 +01:00
insn.c UAPI: x86: Fix insn_sanity build failure after UAPI split 2012-10-02 18:01:56 +01:00
iomap_copy_64.S x86_64: move lib 2007-10-11 11:17:08 +02:00
Makefile x86, boot: Carve out early cmdline parsing function 2014-05-20 20:21:24 -07:00
memcpy_32.c asmlinkage, x86: Fix 32bit memcpy for LTO 2014-02-13 18:14:46 -08:00
memcpy_64.S x86/lib: Fix spelling, put space between a numeral and its units 2013-04-15 11:40:32 +02:00
memmove_64.S x86/lib: Fix spelling, put space between a numeral and its units 2013-04-15 11:40:32 +02:00
memset_64.S x86-64: Fix memset() to support sizes of 4Gb and above 2012-01-26 11:50:04 +01:00
misc.c x86/boot: Further compress CPUs bootup message 2013-10-01 10:52:30 +02:00
mmx_32.c x86: clean up mmx_32.c 2008-04-17 17:40:47 +02:00
msr-reg-export.c x86, pvops: Remove hooks for {rd,wr}msr_safe_regs 2012-06-07 11:41:08 -07:00
msr-reg.S x86, pvops: Remove hooks for {rd,wr}msr_safe_regs 2012-06-07 11:41:08 -07:00
msr-smp.c x86 / msr: add 64bit _on_cpu access functions 2013-10-17 00:36:06 +02:00
msr.c x86: Fix typo preventing msr_set/clear_bit from having an effect 2014-05-09 08:42:32 -07:00
putuser.S x86, smap: Add STAC and CLAC instructions to control user space access 2012-09-21 12:45:27 -07:00
rwlock.S x86: Fix write lock scalability 64-bit issue 2011-07-21 09:03:36 +02:00
rwsem.S x86: Unify rwsem assembly implementation 2011-07-21 09:03:32 +02:00
string_32.c x86/i386: Use less assembly in strlen(), speed things up a bit 2011-12-12 18:33:42 +01:00
strstr_32.c x86: coding style fixes to arch/x86/lib/strstr_32.c 2008-08-15 16:53:24 +02:00
thunk_32.S kprobes, x86: Prohibit probing on thunk functions and restore 2014-04-24 10:02:58 +02:00
thunk_64.S kprobes, x86: Prohibit probing on thunk functions and restore 2014-04-24 10:02:58 +02:00
usercopy.c perf/x86: Fix copy_from_user_nmi() return if range is not ok 2015-09-30 13:20:53 +01:00
usercopy_32.c x86: Unify copy_to_user() and add size checking to it 2013-10-26 12:27:37 +02:00
usercopy_64.c x86, asmlinkage: Make several variables used from assembler/linker script visible 2013-08-06 14:20:13 -07:00
x86-opcode-map.txt x86, mpx: Add MPX related opcodes to the x86 opcode map 2014-01-17 11:04:09 -08:00