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x86/vdso: Use proper modifier for len's format specifier in extract()

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  8382c668ce ("x86/vdso: Add support for exception fixup in vDSO functions")

prints length "len" which is size_t.

Compilers now complain when building on a 32-bit host:

  HOSTCC  arch/x86/entry/vdso/vdso2c
  ...
  In file included from arch/x86/entry/vdso/vdso2c.c:162:
  arch/x86/entry/vdso/vdso2c.h: In function 'extract64':
  arch/x86/entry/vdso/vdso2c.h:38:52: warning: format '%lu' expects argument of \
	type 'long unsigned int', but argument 4 has type 'size_t' {aka 'unsigned int'}

So use proper modifier (%zu) for size_t.

 [ bp: Massage commit message. ]

Fixes: 8382c668ce ("x86/vdso: Add support for exception fixup in vDSO functions")
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lkml.kernel.org/r/20210303064357.17056-1-jslaby@suse.cz
This commit is contained in:
Jiri Slaby 2021-03-03 07:43:57 +01:00 committed by Borislav Petkov
parent a38fd87484
commit 70c9d95922
1 changed files with 1 additions and 1 deletions
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2
arch/x86/entry/vdso/vdso2c.h
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@ -35,7 +35,7 @@ static void BITSFUNC(extract)(const unsigned char *data, size_t data_len,
if (offset + len > data_len)
fail("section to extract overruns input data");
fprintf(outfile, "static const unsigned char %s[%lu] = {", name, len);
fprintf(outfile, "static const unsigned char %s[%zu] = {", name, len);
BITSFUNC(copy)(outfile, data + offset, len);
fprintf(outfile, "\n};\n\n");
}