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Florian Weimer 0d50f477f4 stdio-common: Handle -1 buffer size in __sprintf_chk & co (bug 30039) 
This shows up as an assertion failure when sprintf is called with
a specifier like "%.8g" and libquadmath is linked in:

Fatal glibc error: printf_buffer_as_file.c:31
  (__printf_buffer_as_file_commit): assertion failed:
  file->stream._IO_write_ptr <= file->next->write_end

Fix this by detecting pointer wraparound in __vsprintf_internal
and saturate the addition to the end of the address space instead.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
2023-01-25 08:01:00 +01:00
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asprintf_chk.c
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backtrace-tst.c
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backtrace.c
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backtracesyms.c
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backtracesymsfd.c
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chk_fail.c
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confstr_chk.c
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Depend
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dprintf_chk.c
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execinfo.h
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explicit_bzero_chk.c
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fdelt_chk.c
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fgets_chk.c
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fgets_u_chk.c
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fgetws_chk.c
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fgetws_u_chk.c
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fortify_fail.c
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fprintf_chk.c
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fread_chk.c
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fread_u_chk.c
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fwprintf_chk.c
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getcwd_chk.c
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getdomainname_chk.c
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getgroups_chk.c
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gethostname_chk.c
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gets_chk.c
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getwd_chk.c
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longjmp_chk.c
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Makefile
stdio-common: Handle -1 buffer size in __sprintf_chk & co (bug 30039)
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mbsnrtowcs_chk.c
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mbsrtowcs_chk.c
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mbstowcs_chk.c
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memcpy_chk.c
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memmove_chk.c
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mempcpy_chk.c
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memset_chk.c
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noophooks.c
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obprintf_chk.c
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pcprofile.c
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pcprofiledump.c
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poll_chk.c
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ppoll_chk.c
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pread64_chk.c
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pread_chk.c
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printf_chk.c
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read_chk.c
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readlink_chk.c
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readlinkat_chk.c
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readonly-area.c
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realpath_chk.c
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recv_chk.c
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recvfrom_chk.c
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snprintf_chk.c
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sprintf_chk.c
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stack_chk_fail_local.c
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stack_chk_fail.c
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stpcpy_chk.c
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stpncpy_chk.c
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strcat_chk.c
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strcpy_chk.c
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strncat_chk.c
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strncpy_chk.c
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swprintf_chk.c
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test-stpcpy_chk.c
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test-strcpy_chk.c
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tst-backtrace2.c
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tst-backtrace3.c
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tst-backtrace4.c
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tst-backtrace5.c
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tst-backtrace6.c
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tst-backtrace.h
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tst-chk-cancel.c
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tst-fortify.c
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tst-longjmp_chk2.c
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tst-longjmp_chk3.c
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tst-longjmp_chk.c
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tst-realpath-chk.c
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tst-sprintf-fortify-unchecked.c
stdio-common: Handle -1 buffer size in __sprintf_chk & co (bug 30039)
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tst-ssp-1.c
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ttyname_r_chk.c
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vasprintf_chk.c
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vdprintf_chk.c
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Versions
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vfprintf_chk.c
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vfwprintf_chk.c
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vobprintf_chk.c
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vprintf_chk.c
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vsnprintf_chk.c
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vsprintf_chk.c
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vswprintf_chk.c
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vwprintf_chk.c
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wcpcpy_chk.c
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wcpncpy_chk.c
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wcrtomb_chk.c
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wcscat_chk.c
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wcscpy_chk.c
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wcsncat_chk.c
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wcsncpy_chk.c
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wcsnrtombs_chk.c
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wcsrtombs_chk.c
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wcstombs_chk.c
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wctomb_chk.c
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wmemcpy_chk.c
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wmemmove_chk.c
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wmempcpy_chk.c
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wmemset_chk.c
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wprintf_chk.c
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xtrace.sh
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