/* Unix SMB/Netbios implementation. Version 1.9. SMB parameters and setup Copyright (C) Andrew Tridgell 1992-2000 Copyright (C) Luke Kenneth Casson Leighton 1996-2000 Modified by Jeremy Allison 1995. Copyright (C) Andrew Bartlett 2002-2003 Modified by Steve French (sfrench@us.ibm.com) 2002-2003 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include "cifs_fs_sb.h" #include "cifs_unicode.h" #include "cifspdu.h" #include "cifsglob.h" #include "cifs_debug.h" #include "cifsproto.h" #ifndef false #define false 0 #endif #ifndef true #define true 1 #endif /* following came from the other byteorder.h to avoid include conflicts */ #define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) #define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val))) static void str_to_key(unsigned char *str, unsigned char *key) { int i; key[0] = str[0] >> 1; key[1] = ((str[0] & 0x01) << 6) | (str[1] >> 2); key[2] = ((str[1] & 0x03) << 5) | (str[2] >> 3); key[3] = ((str[2] & 0x07) << 4) | (str[3] >> 4); key[4] = ((str[3] & 0x0F) << 3) | (str[4] >> 5); key[5] = ((str[4] & 0x1F) << 2) | (str[5] >> 6); key[6] = ((str[5] & 0x3F) << 1) | (str[6] >> 7); key[7] = str[6] & 0x7F; for (i = 0; i < 8; i++) key[i] = (key[i] << 1); } static int smbhash(unsigned char *out, const unsigned char *in, unsigned char *key) { unsigned char key2[8]; struct crypto_cipher *tfm_des; str_to_key(key, key2); tfm_des = crypto_alloc_cipher("des", 0, 0); if (IS_ERR(tfm_des)) { cifs_dbg(VFS, "could not allocate des crypto API\n"); return PTR_ERR(tfm_des); } crypto_cipher_setkey(tfm_des, key2, 8); crypto_cipher_encrypt_one(tfm_des, out, in); crypto_free_cipher(tfm_des); return 0; } static int E_P16(unsigned char *p14, unsigned char *p16) { int rc; unsigned char sp8[8] = { 0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 }; rc = smbhash(p16, sp8, p14); if (rc) return rc; rc = smbhash(p16 + 8, sp8, p14 + 7); return rc; } static int E_P24(unsigned char *p21, const unsigned char *c8, unsigned char *p24) { int rc; rc = smbhash(p24, c8, p21); if (rc) return rc; rc = smbhash(p24 + 8, c8, p21 + 7); if (rc) return rc; rc = smbhash(p24 + 16, c8, p21 + 14); return rc; } /* produce a md4 message digest from data of length n bytes */ int mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len) { int rc; unsigned int size; struct crypto_shash *md4; struct sdesc *sdescmd4; md4 = crypto_alloc_shash("md4", 0, 0); if (IS_ERR(md4)) { rc = PTR_ERR(md4); cifs_dbg(VFS, "%s: Crypto md4 allocation error %d\n", __func__, rc); return rc; } size = sizeof(struct shash_desc) + crypto_shash_descsize(md4); sdescmd4 = kmalloc(size, GFP_KERNEL); if (!sdescmd4) { rc = -ENOMEM; goto mdfour_err; } sdescmd4->shash.tfm = md4; sdescmd4->shash.flags = 0x0; rc = crypto_shash_init(&sdescmd4->shash); if (rc) { cifs_dbg(VFS, "%s: Could not init md4 shash\n", __func__); goto mdfour_err; } rc = crypto_shash_update(&sdescmd4->shash, link_str, link_len); if (rc) { cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__); goto mdfour_err; } rc = crypto_shash_final(&sdescmd4->shash, md4_hash); if (rc) cifs_dbg(VFS, "%s: Could not generate md4 hash\n", __func__); mdfour_err: crypto_free_shash(md4); kfree(sdescmd4); return rc; } /* This implements the X/Open SMB password encryption It takes a password, a 8 byte "crypt key" and puts 24 bytes of encrypted password into p24 */ /* Note that password must be uppercased and null terminated */ int SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24) { int rc; unsigned char p14[14], p16[16], p21[21]; memset(p14, '\0', 14); memset(p16, '\0', 16); memset(p21, '\0', 21); memcpy(p14, passwd, 14); rc = E_P16(p14, p16); if (rc) return rc; memcpy(p21, p16, 16); rc = E_P24(p21, c8, p24); return rc; } /* * Creates the MD4 Hash of the users password in NT UNICODE. */ int E_md4hash(const unsigned char *passwd, unsigned char *p16, const struct nls_table *codepage) { int rc; int len; __le16 wpwd[129]; /* Password cannot be longer than 128 characters */ if (passwd) /* Password must be converted to NT unicode */ len = cifs_strtoUTF16(wpwd, passwd, 128, codepage); else { len = 0; *wpwd = 0; /* Ensure string is null terminated */ } rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16)); memzero_explicit(wpwd, sizeof(wpwd)); return rc; } /* Does the NT MD4 hash then des encryption. */ int SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24, const struct nls_table *codepage) { int rc; unsigned char p16[16], p21[21]; memset(p16, '\0', 16); memset(p21, '\0', 21); rc = E_md4hash(passwd, p16, codepage); if (rc) { cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n", __func__, rc); return rc; } memcpy(p21, p16, 16); rc = E_P24(p21, c8, p24); return rc; } diff/fs/xfs/libxfs/xfs_cksum.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7&id2=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'fs/xfs/libxfs/xfs_cksum.h')