Messages in this thread Patch in this message | | | Date | Sat, 22 Mar 1997 22:27:54 -0500 | From | "David S. Miller" <> | Subject | easy way to create random kernel mem corruption |
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Simple, under current 2.1.x write lots of stuff to /dev/random, writes all over past the top of the kernel stack etc. ;-) (NOTE: sun4c mmu page protected kernel stacks on Sparc are what caught this one, there any writes over/under the kernel stack limits will essentially reset the cpu...)
The following should be the fix.
--- drivers/char/random.c.~1~ Thu Mar 20 18:17:41 1997 +++ drivers/char/random.c Sat Mar 22 22:19:01 1997 @@ -1162,7 +1162,7 @@ p += bytes; ret += bytes; - i = (c+sizeof(__u32)-1) / sizeof(__u32); + i = (bytes+sizeof(__u32)-1) / sizeof(__u32); while (i--) add_entropy_word(&random_state, buf[i]); }
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