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| author | Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | 2006-04-17 15:39:23 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-17 18:40:40 -0700 |
| commit | a9a5cd5d2a57fb76dbae2115450f777b69beccf7 (patch) | |
| tree | 510318d8bebb35bb2e1bdaeb7dba0baf9bb073cd /ipc/util.c | |
| parent | 69cf0fac6052c5bd3fb3469a41d4216e926028f8 (diff) | |
| download | lwn-a9a5cd5d2a57fb76dbae2115450f777b69beccf7.tar.gz lwn-a9a5cd5d2a57fb76dbae2115450f777b69beccf7.zip | |
[PATCH] IPC: access to unmapped vmalloc area in grow_ary()
grow_ary() should not copy struct ipc_id_ary (it copies new->p, not
new). Due to this, memcpy() src pointer could hit unmapped vmalloc page
when near page boundary.
Found during OpenVZ stress testing
Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: Kirill Korotaev <dev@openvz.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'ipc/util.c')
| -rw-r--r-- | ipc/util.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/ipc/util.c b/ipc/util.c index 5e785a29e1e6..b3dcfad3b4f7 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -183,8 +183,7 @@ static int grow_ary(struct ipc_ids* ids, int newsize) if(new == NULL) return size; new->size = newsize; - memcpy(new->p, ids->entries->p, sizeof(struct kern_ipc_perm *)*size + - sizeof(struct ipc_id_ary)); + memcpy(new->p, ids->entries->p, sizeof(struct kern_ipc_perm *)*size); for(i=size;i<newsize;i++) { new->p[i] = NULL; } |