path: root/init/initramfs.c
diff options
authorMark Huang <mlhuang@CS.Princeton.EDU>2006-05-15 09:44:03 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-15 11:20:55 -0700
commit6a050da45b5d855b48b057446847ff1542977b52 (patch)
treef455f444ddd5be62740cd430c595c6d6a13fb4db /init/initramfs.c
parent698d070746770aaaec78ab4ffa3ab1f1d5c6abe8 (diff)
[PATCH] initramfs: fix CPIO hardlink check
Copy the filenames of hardlinks when inserting them into the hash, since the "name" pointer may point to scratch space (name_buf). Not doing so results in corruption if the scratch space is later overwritten: the wrong file may be hardlinked, or, if the scratch space contains garbage, the link will fail and a 0-byte file will be created instead. Signed-off-by: Mark Huang <mlhuang@cs.princeton.edu> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'init/initramfs.c')
1 files changed, 4 insertions, 4 deletions
diff --git a/init/initramfs.c b/init/initramfs.c
index 679d870d991b..f81cfa40a719 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -26,10 +26,12 @@ static void __init free(void *where)
/* link hash */
+#define N_ALIGN(len) ((((len) + 1) & ~3) + 2)
static __initdata struct hash {
int ino, minor, major;
struct hash *next;
- char *name;
+ char name[N_ALIGN(PATH_MAX)];
} *head[32];
static inline int hash(int major, int minor, int ino)
@@ -57,7 +59,7 @@ static char __init *find_link(int major, int minor, int ino, char *name)
q->ino = ino;
q->minor = minor;
q->major = major;
- q->name = name;
+ strcpy(q->name, name);
q->next = NULL;
*p = q;
return NULL;
@@ -133,8 +135,6 @@ static inline void eat(unsigned n)
count -= n;
-#define N_ALIGN(len) ((((len) + 1) & ~3) + 2)
static __initdata char *collected;
static __initdata int remains;
static __initdata char *collect;

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