The value of shmmax may be larger than will fit in the struct used by
the 32bit compat version of sys_shmctl. This change mirrors what the
normal sys_shmctl does when called with the old IPC_INFO command.
Signed-off-by: Guy Streeter <[EMAIL PROTECTED]>
---
ipc/compat.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/ipc/compat.c b/ipc/compat.c
index fa18141..8b44aa9 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -542,6 +542,8 @@ static inline int put_compat_shminfo64(struct shminfo64
*smi,
if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
return -EFAULT;
+ if (smi->shmmax > INT_MAX)
+ smi->shmmax = INT_MAX;
err = __put_user(smi->shmmax, &up64->shmmax);
err |= __put_user(smi->shmmin, &up64->shmmin);
err |= __put_user(smi->shmmni, &up64->shmmni);
@@ -557,6 +559,8 @@ static inline int put_compat_shminfo(struct shminfo64 *smi,
if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
return -EFAULT;
+ if (smi->shmmax > INT_MAX)
+ smi->shmmax = INT_MAX;
err = __put_user(smi->shmmax, &up->shmmax);
err |= __put_user(smi->shmmin, &up->shmmin);
err |= __put_user(smi->shmmni, &up->shmmni);
--
1.4.4.2
-
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