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objtool: Use O_CREAT with explicit mode mask 

Recent Ubuntu enforces 3-argument open() with O_CREAT:

      CC      /home/mingo/tip/tools/objtool/builtin-check.o
    In file included from /usr/include/fcntl.h:341,
                     from builtin-check.c:9:
    In function ‘open’,
        inlined from ‘copy_file’ at builtin-check.c:201:11:
    /usr/include/x86_64-linux-gnu/bits/fcntl2.h:52:11: error: call to ‘__open_missing_mode’ declared with attribute error: open with O_CREAT or O_TMPFILE in second argument needs 3 arguments
       52 |           __open_missing_mode ();
          |           ^~~~~~~~~~~~~~~~~~~~~~

Use 0400 as the most restrictive mode for the new file.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org
pull/1183/head
Ingo Molnar 2025-03-17 12:21:57 +01:00
parent 36799069b4
commit 73070466ed
1 changed files with 1 additions and 1 deletions
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2
tools/objtool/builtin-check.c
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@ -198,7 +198,7 @@ static int copy_file(const char *src, const char *dst)
return 1;
}
dst_fd = open(dst, O_WRONLY | O_CREAT | O_TRUNC);
dst_fd = open(dst, O_WRONLY | O_CREAT | O_TRUNC, 0400);
if (dst_fd == -1) {
ERROR("can't open '%s' for writing", dst);
return 1;