[Devel] [PATCH] autofs: fix autofs_v5_packet structure for compat mode

[Stanislav Kinsburskiy]

Due to integer variables alignment size of struct autofs_v5_packet in 300
bytes in 32-bit architectures (instead of 304 bytes in 64-bits architectures).

This may lead to memory corruption (64 bits kernel always send 304 bytes,
while 32-bit userspace application expects for 300).

https://jira.sw.ru/browse/PSBM-71078

Signed-off-by: Stanislav Kinsburskiy <skinsbursky at virtuozzo.com>
---
 include/uapi/linux/auto_fs4.h |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/auto_fs4.h b/include/uapi/linux/auto_fs4.h
index e02982f..8729a47 100644
--- a/include/uapi/linux/auto_fs4.h
+++ b/include/uapi/linux/auto_fs4.h
@@ -137,6 +137,8 @@ struct autofs_v5_packet {
 	__u32 pid;
 	__u32 tgid;
 	__u32 len;
+	__u32 blob;		/* This is needed to align structure up to 8
+				   bytes for ALL archs including 32-bit */
 	char name[NAME_MAX+1];
 };