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ubifs: Use a random number for cookies

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Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2016-10-16 19:51:51 +02:00
parent 528e3d178f
commit cc41a53652
2 changed files with 4 additions and 0 deletions
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3
fs/ubifs/journal.c
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@ -589,6 +589,7 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
dent->nlen = cpu_to_le16(fname_len(nm));
memcpy(dent->name, fname_name(nm), fname_len(nm));
dent->name[fname_len(nm)] = '\0';
dent->cookie = prandom_u32();
zero_dent_node_unused(dent);
ubifs_prep_grp_node(c, dent, dlen, 0);
@ -1124,6 +1125,7 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
dent->nlen = cpu_to_le16(fname_len(new_nm));
memcpy(dent->name, fname_name(new_nm), fname_len(new_nm));
dent->name[fname_len(new_nm)] = '\0';
dent->cookie = prandom_u32();
zero_dent_node_unused(dent);
ubifs_prep_grp_node(c, dent, dlen1, 0);
@ -1142,6 +1144,7 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
dent2->nlen = cpu_to_le16(fname_len(old_nm));
memcpy(dent2->name, fname_name(old_nm), fname_len(old_nm));
dent2->name[fname_len(old_nm)] = '\0';
dent2->cookie = prandom_u32();
zero_dent_node_unused(dent2);
ubifs_prep_grp_node(c, dent2, dlen2, 0);

1
fs/ubifs/ubifs.h
View File

@ -39,6 +39,7 @@
#include <linux/security.h>
#include <linux/xattr.h>
#include <linux/fscrypto.h>
#include <linux/random.h>
#include "ubifs-media.h"
/* Version of this UBIFS implementation */