[Bug libc/27249] New: libSegFault.so does not output signal number properly

[Bug libc/27249] New: libSegFault.so does not output signal number properly

[vt at altlinux dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27249

            Bug ID: 27249
           Summary: libSegFault.so does not output signal number properly
           Product: glibc
           Version: 2.32
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: vt at altlinux dot org
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

libSegFault (used by catchsegv) tries to output signal number, but fails.
Example output is:

> *** signal

Printing code is:

  WRITE_STRING ("*** ");
  write_strsignal (fd, signal);
  WRITE_STRING ("\n");

Where write_strsignal is defined as:

  static void
  write_strsignal (int fd, int signal)
  {
    char buf[30];
    char *ptr = _itoa_word (signal, &buf[sizeof (buf)], 10, 0);
    WRITE_STRING ("signal ");
    write (fd, buf, &buf[sizeof (buf)] - ptr);
  }

Thus, after printing signal number into the tail of buf[] it outputs buf from
the beginning, writing garbage to the output.

Perhaps, it should be:

    write (fd, ptr, &buf[sizeof (buf)] - ptr);

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[Bug libc/27249] libSegFault.so does not output signal number properly

[ldv at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27249

Dmitry V. Levin <ldv at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
           Assignee|unassigned at sourceware dot org   |ldv at sourceware dot org
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #1 from Dmitry V. Levin <ldv at sourceware dot org> ---
Fixed by commit f9be44c7e6d90cb1fe3a0fbe3cc299ac783f0be8.

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[Bug libc/27249] libSegFault.so does not output signal number properly

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27249

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-
   Target Milestone|---                         |2.34
                 CC|                            |fweimer at redhat dot com

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