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  1. 26 9月, 2009 1 次提交
    • A
      x86: Use __builtin_object_size() to validate the buffer size for copy_from_user() · 9f0cf4ad
      由 Arjan van de Ven 提交于 
      gcc (4.x) supports the __builtin_object_size() builtin, which
reports the size of an object that a pointer point to, when known
at compile time. If the buffer size is not known at compile time, a
constant -1 is returned.

This patch uses this feature to add a sanity check to
copy_from_user(); if the target buffer is known to be smaller than
the copy size, the copy is aborted and a WARNing is emitted in
memory debug mode.

These extra checks compile away when the object size is not known,
or if both the buffer size and the copy length are constants.
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <20090926143301.2c396b94@infradead.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      9f0cf4ad
  3. 16 1月, 2009 1 次提交
  5. 21 10月, 2008 1 次提交
  7. 08 7月, 2008 1 次提交
  9. 24 6月, 2008 1 次提交
  11. 24 5月, 2008 1 次提交
  13. 14 5月, 2008 1 次提交
    • I
      x86: fix csum_partial() export · 89804c02
      由 Ingo Molnar 提交于 
      Fix this symbol export problem:

    Building modules, stage 2.
    MODPOST 193 modules
    ERROR: "csum_partial" [fs/reiserfs/reiserfs.ko] undefined!
    make[1]: *** [__modpost] Error 1
    make: *** [modules] Error 2

This is due to a known weakness of symbol exports: if a symbol's
only in-core user is an EXPORT_SYMBOL from a lib-y section, the
symbol is not linked in.

The solution is to move the export to x8664_ksyms_64.c - but the real
solution would be to fix kbuild.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      89804c02
  15. 17 4月, 2008 2 次提交
  17. 30 1月, 2008 2 次提交
  19. 11 10月, 2007 2 次提交
  21. 17 3月, 2007 1 次提交
  23. 13 2月, 2007 2 次提交
  25. 04 10月, 2006 1 次提交
  27. 26 9月, 2006 1 次提交
    • A
      [PATCH] Fix zeroing on exception in copy_*_user · 3022d734
      由 Andi Kleen 提交于 
      - Don't zero for __copy_from_user_inatomic following i386.
This will prevent spurious zeros for parallel file system writers when
one does a exception
- The string instruction version didn't zero the output on
exception. Oops.

Also I cleaned up the code a bit while I was at it and added a minor
optimization to the string instruction path.
Signed-off-by: NAndi Kleen <ak@suse.de>
      3022d734
  29. 27 6月, 2006 1 次提交
  31. 11 4月, 2006 1 次提交
  33. 10 4月, 2006 1 次提交
  35. 01 4月, 2006 1 次提交
  37. 26 3月, 2006 2 次提交
  39. 22 3月, 2006 1 次提交
    • A
      [PATCH] multiple exports of strpbrk · f4a641d6
      由 Andrew Morton 提交于 
      Sam's tree includes a new check, which found that we're exporting strpbrk()
multiple times.

It seems that the convention is that this is exported from the arch files, so
reove the lib/string.c export.

Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: David Howells <dhowells@redhat.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      f4a641d6
  41. 08 2月, 2006 1 次提交
  43. 12 1月, 2006 4 次提交
  45. 11 1月, 2006 1 次提交
  47. 15 11月, 2005 1 次提交
  49. 15 9月, 2005 1 次提交
    • D
      [LIB]: Consolidate _atomic_dec_and_lock() · 4db2ce01
      由 David S. Miller 提交于 
      Several implementations were essentialy a common piece of C code using
the cmpxchg() macro.  Put the implementation in one spot that everyone
can share, and convert sparc64 over to using this.

Alpha is the lone arch-specific implementation, which codes up a
special fast path for the common case in order to avoid GP reloading
which a pure C version would require.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      4db2ce01
  51. 26 5月, 2005 1 次提交
  53. 06 5月, 2005 1 次提交
    • P
      [PATCH] x86_64: make string func definition work as intended · 0c28130b
      由 Paolo 'Blaisorblade' Giarrusso 提交于 
      In include/asm-x86_64/string.h there are such comments:

/* Use C out of line version for memcmp */
#define memcmp __builtin_memcmp
int memcmp(const void * cs,const void * ct,size_t count);

This would mean that if the compiler does not decide to use __builtin_memcmp,
it emits a call to memcmp to be satisfied by the C out-of-line version in
lib/string.c.  What happens is that after preprocessing, in lib/string.i you
may find the definition of "__builtin_strcmp".

Actually, by accident, in the object you will find the definition of strcmp
and such (maybe a trick intended to redirect calls to __builtin_memcmp to the
default memcmp when the definition is not expanded); however, this particular
case is not a documented feature as far as I can see.

Also, the EXPORT_SYMBOL does not work, so it's duplicated in the arch.

I simply added some #undef to lib/string.c and removed the (now duplicated)
exports in x86-64 and UML/x86_64 subarchs (the second ones are introduced by
another patch I just posted for -mm).
Signed-off-by: NPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
CC: Andi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      0c28130b
  55. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      由 Linus Torvalds 提交于 
      Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
      1da177e4