1. 27 12月, 2010 1 次提交
    • J
      x86/microcode: Fix double vfree() and remove redundant pointer checks before vfree() · 5cdd2de0
      Jesper Juhl 提交于
      In arch/x86/kernel/microcode_intel.c::generic_load_microcode()
      we have  this:
      
      	while (leftover) {
      		...
      		if (get_ucode_data(mc, ucode_ptr, mc_size) ||
      		    microcode_sanity_check(mc) < 0) {
      			vfree(mc);
      			break;
      		}
      		...
      	}
      
      	if (mc)
      		vfree(mc);
      
      This will cause a double free of 'mc'. This patch fixes that by
      just  removing the vfree() call in the loop since 'mc' will be
      freed nicely just  after we break out of the loop.
      
      There's also a second change in the patch. I noticed a lot of
      checks for  pointers being NULL before passing them to vfree().
      That's completely  redundant since vfree() deals gracefully with
      being passed a NULL pointer.  Removing the redundant checks
      yields a nice size decrease for the object  file.
      
      Size before the patch:
         text    data     bss     dec     hex filename
         4578     240    1032    5850    16da arch/x86/kernel/microcode_intel.o
      Size after the patch:
         text    data     bss     dec     hex filename
         4489     240     984    5713    1651 arch/x86/kernel/microcode_intel.o
      Signed-off-by: NJesper Juhl <jj@chaosbits.net>
      Acked-by: NTigran Aivazian <tigran@aivazian.fsnet.co.uk>
      Cc: Shaohua Li <shaohua.li@intel.com>
      LKML-Reference: <alpine.LNX.2.00.1012251946100.10759@swampdragon.chaosbits.net>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      5cdd2de0
  2. 24 12月, 2010 9 次提交
  3. 23 12月, 2010 21 次提交
  4. 22 12月, 2010 9 次提交