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0010-Use-alloca-when-VLAs-aren-t-available.patch (824B)


      1 From 4673bf0d6a0eba5d363266a40cfb087e08a66e7f Mon Sep 17 00:00:00 2001
      2 From: Michael Forney <mforney@mforney.org>
      3 Date: Thu, 30 Jan 2020 21:57:34 -0800
      4 Subject: [PATCH] Use alloca when VLAs aren't available
      5 
      6 ---
      7  src/evdev.c | 6 +++++-
      8  1 file changed, 5 insertions(+), 1 deletion(-)
      9 
     10 diff --git a/src/evdev.c b/src/evdev.c
     11 index 81dd951cb..74a765469 100644
     12 --- a/src/evdev.c
     13 +++ b/src/evdev.c
     14 @@ -164,9 +164,13 @@ decode_bitset(struct tcb *const tcp, const kernel_ulong_t arg,
     15  		return RVAL_IOCTL_DECODED;
     16  	}
     17  
     18 +#ifndef __STDC_NO_VLA__
     19  	char decoded_arg[size];
     20 +#else
     21 +	char *decoded_arg = alloca(size);
     22 +#endif
     23  
     24 -	if (umove_or_printaddr(tcp, arg, &decoded_arg))
     25 +	if (umoven_or_printaddr(tcp, arg, size, decoded_arg))
     26  		return RVAL_IOCTL_DECODED;
     27  
     28  	if (xlat_verbose(xlat_verbosity) != XLAT_STYLE_RAW) {
     29 -- 
     30 2.34.1
     31