[PATCH] setrlimit incorrectly allows hard limits to exceed soft limits

From: Kingsley Cheung <kingsley@aurema.com>

[PATCH] setrlimit incorrectly allows hard limits to exceed soft limits
From: Kingsley Cheung <kingsley@aurema.com>
90804bd5 · Rusty Russell · Linus Torvalds · d2a0e2b6 · 90804bd5
Commit 90804bd5 authored Dec 05, 2002 by Rusty Russell Committed by Linus Torvalds Dec 05, 2002
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kernel/sys.c kernel/sys.c +2 -0

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--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1233,6 +1233,8 @@ asmlinkage long sys_setrlimit(unsigned int resource, struct rlimit *rlim)
 		return -EINVAL;
 	if(copy_from_user(&new_rlim, rlim, sizeof(*rlim)))
 		return -EFAULT;
+       if (new_rlim.rlim_cur > new_rlim.rlim_max)
+               return -EINVAL;
 	old_rlim = current->rlim + resource;
 	if (((new_rlim.rlim_cur > old_rlim->rlim_max) ||
 	     (new_rlim.rlim_max > old_rlim->rlim_max)) &&