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firmware: imx: misc: Align imx sc msg structs to 4

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commit 1e6a4eba693ac72e6f91b4252458c933110e5f4c upstream.

The imx SC api strongly assumes that messages are composed out of
4-bytes words but some of our message structs have odd sizeofs.

This produces many oopses with CONFIG_KASAN=y:

    BUG: KASAN: stack-out-of-bounds in imx_mu_send_data+0x108/0x1f0

It shouldn't cause an issues in normal use because these structs are
always allocated on the stack.

Fixes: 15e1f2bc8b ("firmware: imx: add misc svc support")
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Leonard Crestez 2020-02-20 18:29:34 +02:00 • committed by Greg Kroah-Hartman
commit 1bebf41fb8
1 changed files with 3 additions and 3 deletions
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6
drivers/firmware/imx/misc.c
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@ -16,7 +16,7 @@ struct imx_sc_msg_req_misc_set_ctrl {
u32 ctrl;
u32 val;
u16 resource;
} __packed;
} __packed __aligned(4);
struct imx_sc_msg_req_cpu_start {
struct imx_sc_rpc_msg hdr;
@ -30,12 +30,12 @@ struct imx_sc_msg_req_misc_get_ctrl {
struct imx_sc_rpc_msg hdr;
u32 ctrl;
u16 resource;
} __packed;
} __packed __aligned(4);
struct imx_sc_msg_resp_misc_get_ctrl {
struct imx_sc_rpc_msg hdr;
u32 val;
} __packed;
} __packed __aligned(4);
/*
* This function sets a miscellaneous control value.