https://github.com/torvalds/linux
Revision 25fab9ebac445d57b656f5faabac5a195bed2f82 authored by Peter Oberparleiter on 12 February 2006, 01:55:59 UTC, committed by Linus Torvalds on 12 February 2006, 05:41:12 UTC
When the sclp interface takes very long to serve a request, the sclp core driver will report a failed request to the sclp tty driver even though the request is still being processed by the sclp interface. Eventually the sclp interface completes the request and updates some fields in the request buffer which leads to a corrupted tty pages list. The next time function sclp_tty_write_room is called, the corrupted list will be traversed, resulting in an oops. To avoid this remove the busy retry limit and increase retry intervals. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1 parent e6f3601
Tip revision: 25fab9ebac445d57b656f5faabac5a195bed2f82 authored by Peter Oberparleiter on 12 February 2006, 01:55:59 UTC
[PATCH] s390: fix sclp memory corruption in tty pages list
[PATCH] s390: fix sclp memory corruption in tty pages list
Tip revision: 25fab9e
sha1.c
/*
* SHA transform algorithm, originally taken from code written by
* Peter Gutmann, and placed in the public domain.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/cryptohash.h>
/* The SHA f()-functions. */
#define f1(x,y,z) (z ^ (x & (y ^ z))) /* x ? y : z */
#define f2(x,y,z) (x ^ y ^ z) /* XOR */
#define f3(x,y,z) ((x & y) + (z & (x ^ y))) /* majority */
/* The SHA Mysterious Constants */
#define K1 0x5A827999L /* Rounds 0-19: sqrt(2) * 2^30 */
#define K2 0x6ED9EBA1L /* Rounds 20-39: sqrt(3) * 2^30 */
#define K3 0x8F1BBCDCL /* Rounds 40-59: sqrt(5) * 2^30 */
#define K4 0xCA62C1D6L /* Rounds 60-79: sqrt(10) * 2^30 */
/*
* sha_transform: single block SHA1 transform
*
* @digest: 160 bit digest to update
* @data: 512 bits of data to hash
* @W: 80 words of workspace (see note)
*
* This function generates a SHA1 digest for a single 512-bit block.
* Be warned, it does not handle padding and message digest, do not
* confuse it with the full FIPS 180-1 digest algorithm for variable
* length messages.
*
* Note: If the hash is security sensitive, the caller should be sure
* to clear the workspace. This is left to the caller to avoid
* unnecessary clears between chained hashing operations.
*/
void sha_transform(__u32 *digest, const char *in, __u32 *W)
{
__u32 a, b, c, d, e, t, i;
for (i = 0; i < 16; i++)
W[i] = be32_to_cpu(((const __be32 *)in)[i]);
for (i = 0; i < 64; i++)
W[i+16] = rol32(W[i+13] ^ W[i+8] ^ W[i+2] ^ W[i], 1);
a = digest[0];
b = digest[1];
c = digest[2];
d = digest[3];
e = digest[4];
for (i = 0; i < 20; i++) {
t = f1(b, c, d) + K1 + rol32(a, 5) + e + W[i];
e = d; d = c; c = rol32(b, 30); b = a; a = t;
}
for (; i < 40; i ++) {
t = f2(b, c, d) + K2 + rol32(a, 5) + e + W[i];
e = d; d = c; c = rol32(b, 30); b = a; a = t;
}
for (; i < 60; i ++) {
t = f3(b, c, d) + K3 + rol32(a, 5) + e + W[i];
e = d; d = c; c = rol32(b, 30); b = a; a = t;
}
for (; i < 80; i ++) {
t = f2(b, c, d) + K4 + rol32(a, 5) + e + W[i];
e = d; d = c; c = rol32(b, 30); b = a; a = t;
}
digest[0] += a;
digest[1] += b;
digest[2] += c;
digest[3] += d;
digest[4] += e;
}
EXPORT_SYMBOL(sha_transform);
/*
* sha_init: initialize the vectors for a SHA1 digest
*
* @buf: vector to initialize
*/
void sha_init(__u32 *buf)
{
buf[0] = 0x67452301;
buf[1] = 0xefcdab89;
buf[2] = 0x98badcfe;
buf[3] = 0x10325476;
buf[4] = 0xc3d2e1f0;
}
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