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422ff87c24
__libc_argv[0] points to address on stack and __libc_secure_getenv accesses environment variables which are on stack. We should avoid accessing stack when stack is corrupted. This patch also renames function argument in __fortify_fail_abort from do_backtrace to need_backtrace to avoid confusion with do_backtrace from enum __libc_message_action. [BZ #21752] * debug/fortify_fail.c (__fortify_fail_abort): Don't pass down __libc_argv[0] if we aren't doing backtrace. Rename do_backtrace to need_backtrace. * sysdeps/posix/libc_fatal.c (__libc_message): Don't call __libc_secure_getenv if we aren't doing backtrace.
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* Copyright (C) 2007-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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extern char **__libc_argv attribute_hidden;
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void
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__attribute__ ((noreturn)) internal_function
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__fortify_fail_abort (_Bool need_backtrace, const char *msg)
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{
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/* The loop is added only to keep gcc happy. Don't pass down
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__libc_argv[0] if we aren't doing backtrace since __libc_argv[0]
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may point to the corrupted stack. */
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while (1)
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__libc_message (need_backtrace ? (do_abort | do_backtrace) : do_abort,
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"*** %s ***: %s terminated\n",
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msg,
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(need_backtrace && __libc_argv[0] != NULL
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? __libc_argv[0] : "<unknown>"));
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}
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void
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__attribute__ ((noreturn)) internal_function
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__fortify_fail (const char *msg)
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{
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__fortify_fail_abort (true, msg);
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}
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libc_hidden_def (__fortify_fail)
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libc_hidden_def (__fortify_fail_abort)
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