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Subject[RFC PATCH 2/2] autofs: sent 32-bit sized packet for 32-bit process
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The structure autofs_v5_packet (except name) is not aligned by 8 bytes, which
leads to different sizes in 32 and 64-bit architectures.
Let's form 32-bit compatible packet when daemon has 32-bit addressation.

Suggested-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Stanislav Kinsburskiy <skinsbursky@virtuozzo.com>
---
fs/autofs4/waitq.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 24a58bf..1f9b7d8 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -151,6 +151,11 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
struct autofs_v5_packet *packet = &pkt.v5_pkt.v5_packet;
struct user_namespace *user_ns = sbi->pipe->f_cred->user_ns;

+#ifdef CONFIG_COMPAT
+ if (sbi->is32bit)
+ pktsz = offsetofend(struct autofs_v5_packet, name);
+ else
+#endif
pktsz = sizeof(*packet);

packet->wait_queue_token = wq->wait_queue_token;
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