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c/r: prctl: add minimal address test to PR_SET_MM

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Make sure the address being set is greater than mmap_min_addr (as
suggested by Kees Cook).

Signed-off-by: Cyrill Gorcunov <[email protected]>
Acked-by: Kees Cook <[email protected]>
Cc: Serge Hallyn <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Cyrill Gorcunov authored and Linus Torvalds committed 2012-06-07 14:43:55 -07:00
1 parent bafb282df2
commit 1ad75b9e16
1 file changed
+1 -1
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kernel/sys.c
+1 -1
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@@ -1869,7 +1869,7 @@ static int prctl_set_mm(int opt, unsigned long addr,
if (opt == PR_SET_MM_EXE_FILE)
return prctl_set_mm_exe_file(mm, (unsigned int)addr);
if (addr >= TASK_SIZE)
if (addr >= TASK_SIZE || addr < mmap_min_addr)
return -EINVAL;
error = -EINVAL;