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| author | Mark Huang <mlhuang@CS.Princeton.EDU> | 2006-05-15 09:44:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-05-15 11:20:55 -0700 |
| commit | 6a050da45b5d855b48b057446847ff1542977b52 (patch) | |
| tree | f455f444ddd5be62740cd430c595c6d6a13fb4db | |
| parent | 698d070746770aaaec78ab4ffa3ab1f1d5c6abe8 (diff) | |
| download | kernel-common-6a050da45b5d855b48b057446847ff1542977b52.tar.gz kernel-common-6a050da45b5d855b48b057446847ff1542977b52.tar.bz2 kernel-common-6a050da45b5d855b48b057446847ff1542977b52.zip | |
[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>
| -rw-r--r-- | init/initramfs.c | 8 |
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; |