From: Andreas Schwab Date: Mon, 8 Dec 2014 14:13:38 +0000 (+0100) Subject: Don't touch user-controlled stdio locks in forked child (bug 12847) X-Git-Tag: glibc-2.21~268 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=217a74a85cdd60df236c296ad88142b78d35eccf;p=thirdparty%2Fglibc.git Don't touch user-controlled stdio locks in forked child (bug 12847) The stdio locks for streams with the _IO_USER_LOCK flag should not be touched by internal code. --- diff --git a/ChangeLog b/ChangeLog index 03bba82de75..c2d99a027b4 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2014-12-10 Andreas Schwab + + [BZ #12847] + * sysdeps/nptl/fork.c (fresetlockfiles): Skip files with + user-controlled locks. + 2014-12-10 Richard Earnshaw * sysdeps/aarch64/strchrnul.S (vrepmask): Use a call-clobbered diff --git a/sysdeps/nptl/fork.c b/sysdeps/nptl/fork.c index a7dafa82ab2..7ef693d529d 100644 --- a/sysdeps/nptl/fork.c +++ b/sysdeps/nptl/fork.c @@ -46,7 +46,8 @@ fresetlockfiles (void) _IO_ITER i; for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i)) - _IO_lock_init (*((_IO_lock_t *) _IO_iter_file(i)->_lock)); + if ((_IO_iter_file (i)->_flags & _IO_USER_LOCK) == 0) + _IO_lock_init (*((_IO_lock_t *) _IO_iter_file(i)->_lock)); }