0003-Prevent-zero-length-array-members-in-asound.h.patch - opkg

0003-Prevent-zero-length-array-members-in-asound.h.patch (2610B)
      1 From 4d7aad2421c783cf57f359638197f0ad2a32a287 Mon Sep 17 00:00:00 2001
      2 From: Michael Forney <mforney@mforney.org>
      3 Date: Mon, 30 Aug 2021 19:26:32 -0700
      4 Subject: [PATCH] Prevent zero-length array members in asound.h
      5 
      6 ---
      7  include/uapi/sound/asound.h | 31 +++++++++++++++++++++----------
      8  1 file changed, 21 insertions(+), 10 deletions(-)
      9 
     10 diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h
     11 index 0aa955aa8246..2e7ca9236c7a 100644
     12 --- a/include/uapi/sound/asound.h
     13 +++ b/include/uapi/sound/asound.h
     14 @@ -550,22 +550,30 @@ struct __snd_pcm_sync_ptr {
     15  	} c;
     16  };
     17  
     18 +#if __BITS_PER_LONG == 32
     19  #if defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
     20 -typedef char __pad_before_uframe[sizeof(__u64) - sizeof(snd_pcm_uframes_t)];
     21 -typedef char __pad_after_uframe[0];
     22 +#define __PAD_BEFORE_UFRAME(x) char x[sizeof(__u64) - sizeof(snd_pcm_uframes_t)];
     23  #endif
     24  
     25  #if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
     26 -typedef char __pad_before_uframe[0];
     27 -typedef char __pad_after_uframe[sizeof(__u64) - sizeof(snd_pcm_uframes_t)];
     28 +#define __PAD_AFTER_UFRAME(x) char x[sizeof(__u64) - sizeof(snd_pcm_uframes_t)];
     29 +#endif
     30 +#endif
     31 +
     32 +#ifndef __PAD_BEFORE_UFRAME
     33 +#define __PAD_BEFORE_UFRAME(x)
     34 +#endif
     35 +
     36 +#ifndef __PAD_AFTER_UFRAME
     37 +#define __PAD_AFTER_UFRAME(x)
     38  #endif
     39  
     40  struct __snd_pcm_mmap_status64 {
     41  	snd_pcm_state_t state;		/* RO: state - SNDRV_PCM_STATE_XXXX */
     42  	__u32 pad1;			/* Needed for 64 bit alignment */
     43 -	__pad_before_uframe __pad1;
     44 +	__PAD_BEFORE_UFRAME(__pad1)
     45  	snd_pcm_uframes_t hw_ptr;	/* RO: hw ptr (0...boundary-1) */
     46 -	__pad_after_uframe __pad2;
     47 +	__PAD_AFTER_UFRAME(__pad2)
     48  	struct __snd_timespec64 tstamp;	/* Timestamp */
     49  	snd_pcm_state_t suspended_state;/* RO: suspended stream state */
     50  	__u32 pad3;			/* Needed for 64 bit alignment */
     51 @@ -573,16 +581,19 @@ struct __snd_pcm_mmap_status64 {
     52  };
     53  
     54  struct __snd_pcm_mmap_control64 {
     55 -	__pad_before_uframe __pad1;
     56 +	__PAD_BEFORE_UFRAME(__pad1)
     57  	snd_pcm_uframes_t appl_ptr;	 /* RW: appl ptr (0...boundary-1) */
     58 -	__pad_before_uframe __pad2;	 // This should be __pad_after_uframe, but binary
     59 +	__PAD_BEFORE_UFRAME(__pad2)	 // This should be __pad_after_uframe, but binary
     60  					 // backwards compatibility constraints prevent a fix.
     61  
     62 -	__pad_before_uframe __pad3;
     63 +	__PAD_BEFORE_UFRAME(__pad3)
     64  	snd_pcm_uframes_t  avail_min;	 /* RW: min available frames for wakeup */
     65 -	__pad_after_uframe __pad4;
     66 +	__PAD_AFTER_UFRAME(__pad4)
     67  };
     68  
     69 +#undef __PAD_BEFORE_UFRAME
     70 +#undef __PAD_AFTER_UFRAME
     71 +
     72  struct __snd_pcm_sync_ptr64 {
     73  	__u32 flags;
     74  	__u32 pad1;
     75 -- 
     76 2.37.3
     77