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(parent: cef5327) | patch
x86, SGI UV: uv_ptc_proc_write fix
authorCliff Wickman <cpw@sgi.com>
Mon, 23 Jun 2008 13:32:25 +0000 (08:32 -0500)
committerIngo Molnar <mingo@elte.hu>
Tue, 8 Jul 2008 10:23:31 +0000 (12:23 +0200)
commite7eb8726d0e144f0925972c4ecee945e91a42753
tree63dbc5c4ca72cdc2ea2ec11a31ad69e74fc3e3abtree | snapshot (tar.gz zip)
parentcef53278682eb2604cbd99de64cdb59a8b35235acommit | diff
x86, SGI UV: uv_ptc_proc_write fix

Someone could write 0 bytes to /proc/sgi_uv/ptc_statistics,
causing
  optstr[count - 1] = '\0';
to write to who-knows-where.

(Andi Kleen noticed this need from a patch I sent for
 similar code in the ia64 world (sn2_ptc_proc_write()).)

(count less than zero is not possible here, as count is unsigned)

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/kernel/tlb_uv.c diff | blob | blame | history