From aa60d72514a2bc51017edeb0ccdd9904b8c2e745 Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Thu, 28 Apr 2016 10:12:05 +0200 Subject: S/390: Fix setcontext/swapcontext which are not restoring sigmask. [BZ #18080] This patch uses sigprocmask(SIG_SETMASK) instead of SIG_BLOCK in setcontext, swapcontext. (cherry picked from commit 2e807f29595eb5b1e5d0decc6e356a3562ecc58e) --- sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S | 2 +- sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S | 16 +++++----------- sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S | 2 +- sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S | 16 +++++----------- 4 files changed, 12 insertions(+), 24 deletions(-) (limited to 'sysdeps/unix/sysv') diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S b/sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S index 42839e26f1..b26377398a 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S @@ -34,7 +34,7 @@ ENTRY(__setcontext) lr %r1,%r2 /* rt_sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL, sigsetsize). */ - la %r2,SIG_BLOCK + la %r2,SIG_SETMASK la %r3,SC_MASK(%r1) slr %r4,%r4 lhi %r5,_NSIG8 diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S b/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S index 9206aa334d..8f9cfd834d 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/swapcontext.S @@ -24,7 +24,7 @@ /* __swapcontext (ucontext_t *oucp, const ucontext_t *ucp) Saves the machine context in oucp such that when it is activated, - it appears as if __swapcontextt() returned again, restores the + it appears as if __swapcontext() returned again, restores the machine context in ucp and thereby resumes execution in that context. @@ -39,13 +39,6 @@ ENTRY(__swapcontext) lr %r1,%r2 lr %r0,%r3 - /* sigprocmask (SIG_BLOCK, NULL, &sc->sc_mask). */ - la %r2,SIG_BLOCK - slr %r3,%r3 - la %r4,SC_MASK(%r1) - lhi %r5,_NSIG8 - svc SYS_ify(rt_sigprocmask) - /* Store fpu context. */ stfpc SC_FPC(%r1) std %f0,SC_FPRS(%r1) @@ -74,11 +67,12 @@ ENTRY(__swapcontext) /* Store general purpose registers. */ stm %r0,%r15,SC_GPRS(%r1) - /* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL). */ - la %r2,SIG_BLOCK + /* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, + sigsetsize). */ + la %r2,SIG_SETMASK lr %r5,%r0 la %r3,SC_MASK(%r5) - slr %r4,%r4 + la %r4,SC_MASK(%r1) lhi %r5,_NSIG8 svc SYS_ify(rt_sigprocmask) diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S b/sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S index 83df5ce461..1464e6a094 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S @@ -34,7 +34,7 @@ ENTRY(__setcontext) lgr %r1,%r2 /* sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL). */ - la %r2,SIG_BLOCK + la %r2,SIG_SETMASK la %r3,SC_MASK(%r1) slgr %r4,%r4 lghi %r5,_NSIG8 diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S b/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S index e3e624c91b..8346fd5dd1 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/swapcontext.S @@ -24,7 +24,7 @@ /* __swapcontext (ucontext_t *oucp, const ucontext_t *ucp) Saves the machine context in oucp such that when it is activated, - it appears as if __swapcontextt() returned again, restores the + it appears as if __swapcontext() returned again, restores the machine context in ucp and thereby resumes execution in that context. @@ -39,13 +39,6 @@ ENTRY(__swapcontext) lgr %r1,%r2 lgr %r0,%r3 - /* sigprocmask (SIG_BLOCK, NULL, &sc->sc_mask). */ - la %r2,SIG_BLOCK - slgr %r3,%r3 - la %r4,SC_MASK(%r1) - lghi %r5,_NSIG8 - svc SYS_ify(rt_sigprocmask) - /* Store fpu context. */ stfpc SC_FPC(%r1) std %f0,SC_FPRS(%r1) @@ -74,12 +67,13 @@ ENTRY(__swapcontext) /* Store general purpose registers. */ stmg %r0,%r15,SC_GPRS(%r1) - /* rt_sigprocmask (SIG_SETMASK, &sc->sc_mask, NULL, sigsetsize). */ - la %r2,SIG_BLOCK + /* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask, + sigsetsize). */ + la %r2,SIG_SETMASK lgr %r5,%r0 la %r3,SC_MASK(%r5) + la %r4,SC_MASK(%r1) lghi %r5,_NSIG8 - slgr %r4,%r4 svc SYS_ify(rt_sigprocmask) /* Load fpu context. */ -- cgit v1.2.3-70-g09d2 From 05cc5bbd3cf037daee848c11792a6471de01298d Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Thu, 28 Apr 2016 10:21:58 +0200 Subject: S390: Fix "backtrace() returns infinitely deep stack frames with makecontext()" [BZ #18508]. On s390/s390x backtrace(buffer, size) returns the series of called functions until "makecontext_ret" and additional entries (up to "size") with "makecontext_ret". GDB-backtrace is also warning: "Backtrace stopped: previous frame identical to this frame (corrupt stack?)" To reproduce this scenario you have to setup a new context with makecontext() and activate it with setcontext(). See e.g. cf() function in testcase stdlib/tst-makecontext.c. Or see bug in libgo "Bug 66303 - runtime.Caller() returns infinitely deep stack frames on s390x " (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66303). This patch omits the cfi_startproc/cfi_endproc directives in ENTRY/END macro of __makecontext_ret. Thus no frame information is generated in .eh_frame and backtrace stops after __makecontext_ret. There is also no .eh_frame info for _start or thread_start functions. ChangeLog: [BZ #18508] * stdlib/Makefile ($(objpfx)tst-makecontext3): Depend on $(libdl). * stdlib/tst-makecontext.c (cf): Test if _Unwind_Backtrace is not called infinitely times. (backtrace_helper): New function. (trace_arg): New struct. (st1): Enlarge stack size. * sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S: (__makecontext_ret): Omit cfi_startproc and cfi_endproc. * sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S: Likewise. (cherry picked from commit 890b7a4b33d482b5c768ab47d70758b80227e9bc) --- ChangeLog | 15 ++++++++ NEWS | 2 +- stdlib/Makefile | 2 ++ stdlib/tst-makecontext.c | 41 +++++++++++++++++++++- .../sysv/linux/s390/s390-32/__makecontext_ret.S | 8 +++++ .../sysv/linux/s390/s390-64/__makecontext_ret.S | 8 +++++ 6 files changed, 74 insertions(+), 2 deletions(-) (limited to 'sysdeps/unix/sysv') diff --git a/ChangeLog b/ChangeLog index 9b6e9f54e0..ac7f870508 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,18 @@ +2016-04-28 Stefan Liebler + + [BZ #18508] + * stdlib/Makefile ($(objpfx)tst-makecontext3): + Depend on $(libdl). + * stdlib/tst-makecontext.c (cf): Test if _Unwind_Backtrace + is not called infinitely times. + (backtrace_helper): New function. + (trace_arg): New struct. + (st1): Enlarge stack size. + * sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S: + (__makecontext_ret): Omit cfi_startproc and cfi_endproc. + * sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S: + Likewise. + 2016-04-28 Stefan Liebler [BZ #18080] diff --git a/NEWS b/NEWS index 18d873e4b8..b2a1871389 100644 --- a/NEWS +++ b/NEWS @@ -12,7 +12,7 @@ Version 2.19.1 15946, 16545, 16574, 16623, 16657, 16695, 16743, 16758, 16759, 16760, 16878, 16882, 16885, 16916, 16932, 16943, 16958, 17048, 17062, 17069, 17079, 17137, 17153, 17213, 17263, 17269, 17325, 17555, 17905, 18007, - 18032, 18080, 18240, 18287, 18905, 19879. + 18032, 18080, 18240, 18287, 18508, 18905, 19879. * A buffer overflow in gethostbyname_r and related functions performing DNS requests has been fixed. If the NSS functions were called with a diff --git a/stdlib/Makefile b/stdlib/Makefile index b46c4a1fea..8a34b838b6 100644 --- a/stdlib/Makefile +++ b/stdlib/Makefile @@ -164,3 +164,5 @@ tst-tls-atexit-lib.so-no-z-defs = yes $(objpfx)tst-tls-atexit: $(common-objpfx)nptl/libpthread.so \ $(common-objpfx)dlfcn/libdl.so $(objpfx)tst-tls-atexit.out: $(objpfx)tst-tls-atexit-lib.so + +$(objpfx)tst-makecontext: $(libdl) diff --git a/stdlib/tst-makecontext.c b/stdlib/tst-makecontext.c index 7968a6d3dc..ef1e27a634 100644 --- a/stdlib/tst-makecontext.c +++ b/stdlib/tst-makecontext.c @@ -19,23 +19,62 @@ #include #include #include +#include +#include +#include +#include ucontext_t ucp; -char st1[8192]; +char st1[16384]; __thread int thr; int somevar = -76; long othervar = -78L; +struct trace_arg +{ + int cnt, size; +}; + +static _Unwind_Reason_Code +backtrace_helper (struct _Unwind_Context *ctx, void *a) +{ + struct trace_arg *arg = a; + if (++arg->cnt == arg->size) + return _URC_END_OF_STACK; + return _URC_NO_REASON; +} + void cf (int i) { + struct trace_arg arg = { .size = 100, .cnt = -1 }; + void *handle; + _Unwind_Reason_Code (*unwind_backtrace) (_Unwind_Trace_Fn, void *); + if (i != othervar || thr != 94) { printf ("i %d thr %d\n", i, thr); exit (1); } + /* Test if callback function of _Unwind_Backtrace is not called infinitely + times. See Bug 18508 or gcc bug "Bug 66303 - runtime.Caller() returns + infinitely deep stack frames on s390x.". + The go runtime calls backtrace_full() in + /libbacktrace/backtrace.c, which uses _Unwind_Backtrace(). */ + handle = dlopen (LIBGCC_S_SO, RTLD_LAZY); + if (handle != NULL) + { + unwind_backtrace = dlsym (handle, "_Unwind_Backtrace"); + if (unwind_backtrace != NULL) + { + unwind_backtrace (backtrace_helper, &arg); + assert (arg.cnt != -1 && arg.cnt < 100); + } + dlclose (handle); + } + /* Since uc_link below has been set to NULL, setcontext is supposed to terminate the process normally after this function returns. */ } diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S b/sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S index 83cf0d8ffa..67ea206de4 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S +++ b/sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S @@ -17,6 +17,14 @@ #include +/* We do not want .eh_frame info so that __makecontext_ret stops unwinding + if backtrace was called within a context created by makecontext. (There + is also no .eh_frame info for _start or thread_start.) */ +#undef cfi_startproc +#define cfi_startproc +#undef cfi_endproc +#define cfi_endproc + ENTRY(__makecontext_ret) basr %r14,%r7 ltr %r8,%r8 /* Check whether uc_link is 0. */ diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S b/sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S index 71ecbab08e..a2bf3ca02d 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S +++ b/sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S @@ -17,6 +17,14 @@ #include +/* We do not want .eh_frame info so that __makecontext_ret stops unwinding + if backtrace was called within a context created by makecontext. (There + is also no .eh_frame info for _start or thread_start.) */ +#undef cfi_startproc +#define cfi_startproc +#undef cfi_endproc +#define cfi_endproc + ENTRY(__makecontext_ret) basr %r14,%r7 ltgr %r8,%r8 /* Check whether uc_link is 0. */ -- cgit v1.2.3-70-g09d2 From e97fb84811238c627f93e5e703a11eb841601947 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Wed, 4 May 2016 12:09:35 +0200 Subject: CVE-2016-1234: glob: Do not copy d_name field of struct dirent [BZ #19779] Instead, we store the data we need from the return value of readdir in an object of the new type struct readdir_result. This type is independent of the layout of struct dirent. (cherry picked from commit 5171f3079f2cc53e0548fc4967361f4d1ce9d7ea) --- ChangeLog | 21 ++++ NEWS | 6 +- posix/bug-glob2.c | 14 ++- posix/glob.c | 223 +++++++++++++++++++--------------- sysdeps/unix/sysv/linux/i386/glob64.c | 22 ++++ 5 files changed, 185 insertions(+), 101 deletions(-) (limited to 'sysdeps/unix/sysv') diff --git a/ChangeLog b/ChangeLog index cb3db0379d..c55bff53ba 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,24 @@ +2016-05-04 Florian Weimer + + [BZ #19779] + CVE-2016-1234 + Avoid copying names of directory entries. + * posix/glob.c (DIRENT_MUST_BE, DIRENT_MIGHT_BE_SYMLINK) + (DIRENT_MIGHT_BE_DIR, CONVERT_D_INO, CONVERT_D_TYPE) + (CONVERT_DIRENT_DIRENT64, REAL_DIR_ENTRY): Remove macros. + (struct readdir_result): New type. + (D_TYPE_TO_RESULT, D_INO_TO_RESULT, READDIR_RESULT_INITIALIZER) + (GL_READDIR): New macros. + (readdir_result_might_be_symlink, readdir_result_might_be_dir) + (convert_dirent, convert_dirent64): New functions. + (glob_in_dir): Use struct readdir_result. Call convert_dirent or + convert_dirent64. Adjust references to the readdir result. + * sysdeps/unix/sysv/linux/i386/glob64.c: + (convert_dirent, GL_READDIR): Redefine for second file inclusion. + * posix/bug-glob2.c (LONG_NAME): Define. + (filesystem): Add LONG_NAME. + (my_DIR): Increase the size of room_for_dirent. + 2016-04-29 Florian Weimer glob: Simplify and document the interface for the GLOB_ALTDIRFUNC diff --git a/NEWS b/NEWS index b2a1871389..00a8add0f3 100644 --- a/NEWS +++ b/NEWS @@ -12,7 +12,7 @@ Version 2.19.1 15946, 16545, 16574, 16623, 16657, 16695, 16743, 16758, 16759, 16760, 16878, 16882, 16885, 16916, 16932, 16943, 16958, 17048, 17062, 17069, 17079, 17137, 17153, 17213, 17263, 17269, 17325, 17555, 17905, 18007, - 18032, 18080, 18240, 18287, 18508, 18905, 19879. + 18032, 18080, 18240, 18287, 18508, 18905, 19779, 19879. * A buffer overflow in gethostbyname_r and related functions performing DNS requests has been fixed. If the NSS functions were called with a @@ -68,6 +68,10 @@ Version 2.19.1 alloca call (in the form of a call to strdupa), leading to a stack overflow (stack exhaustion) and a crash if getnetbyname is invoked on a very long name. (CVE-2016-3075) + +* The glob function suffered from a stack-based buffer overflow when it was + called with the GLOB_ALTDIRFUNC flag and encountered a long file name. + Reported by Alexander Cherepanov. (CVE-2016-1234) Version 2.19 diff --git a/posix/bug-glob2.c b/posix/bug-glob2.c index 1b1ca5a719..3f9c620299 100644 --- a/posix/bug-glob2.c +++ b/posix/bug-glob2.c @@ -40,6 +40,17 @@ # define PRINTF(fmt, args...) #endif +#define LONG_NAME \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ + "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" static struct { @@ -58,6 +69,7 @@ static struct { ".", 3, DT_DIR, 0755 }, { "..", 3, DT_DIR, 0755 }, { "a", 3, DT_REG, 0644 }, + { LONG_NAME, 3, DT_REG, 0644 }, { "unreadable", 2, DT_DIR, 0111 }, { ".", 3, DT_DIR, 0111 }, { "..", 3, DT_DIR, 0755 }, @@ -75,7 +87,7 @@ typedef struct int level; int idx; struct dirent d; - char room_for_dirent[NAME_MAX]; + char room_for_dirent[sizeof (LONG_NAME)]; } my_DIR; diff --git a/posix/glob.c b/posix/glob.c index 05749130cc..ae3b8b770f 100644 --- a/posix/glob.c +++ b/posix/glob.c @@ -24,7 +24,9 @@ #include #include #include +#include #include +#include /* Outcomment the following line for production quality code. */ /* #define NDEBUG 1 */ @@ -73,69 +75,8 @@ # endif /* HAVE_VMSDIR_H */ #endif - -/* When used in the GNU libc the symbol _DIRENT_HAVE_D_TYPE is available - if the `d_type' member for `struct dirent' is available. - HAVE_STRUCT_DIRENT_D_TYPE plays the same role in GNULIB. */ -#if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE -/* True if the directory entry D must be of type T. */ -# define DIRENT_MUST_BE(d, t) ((d)->d_type == (t)) - -/* True if the directory entry D might be a symbolic link. */ -# define DIRENT_MIGHT_BE_SYMLINK(d) \ - ((d)->d_type == DT_UNKNOWN || (d)->d_type == DT_LNK) - -/* True if the directory entry D might be a directory. */ -# define DIRENT_MIGHT_BE_DIR(d) \ - ((d)->d_type == DT_DIR || DIRENT_MIGHT_BE_SYMLINK (d)) - -#else /* !HAVE_D_TYPE */ -# define DIRENT_MUST_BE(d, t) false -# define DIRENT_MIGHT_BE_SYMLINK(d) true -# define DIRENT_MIGHT_BE_DIR(d) true -#endif /* HAVE_D_TYPE */ - -/* If the system has the `struct dirent64' type we use it internally. */ -#if defined _LIBC && !defined COMPILE_GLOB64 - -# if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__ -# define CONVERT_D_INO(d64, d32) -# else -# define CONVERT_D_INO(d64, d32) \ - (d64)->d_ino = (d32)->d_ino; -# endif - -# ifdef _DIRENT_HAVE_D_TYPE -# define CONVERT_D_TYPE(d64, d32) \ - (d64)->d_type = (d32)->d_type; -# else -# define CONVERT_D_TYPE(d64, d32) -# endif - -# define CONVERT_DIRENT_DIRENT64(d64, d32) \ - strcpy ((d64)->d_name, (d32)->d_name); \ - CONVERT_D_INO (d64, d32) \ - CONVERT_D_TYPE (d64, d32) -#endif - - -#if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__ -/* Posix does not require that the d_ino field be present, and some - systems do not provide it. */ -# define REAL_DIR_ENTRY(dp) 1 -#else -# define REAL_DIR_ENTRY(dp) (dp->d_ino != 0) -#endif /* POSIX */ - #include #include - -/* NAME_MAX is usually defined in or . */ -#include -#ifndef NAME_MAX -# define NAME_MAX (sizeof (((struct dirent *) 0)->d_name)) -#endif - #include #ifdef _LIBC @@ -180,8 +121,111 @@ static const char *next_brace_sub (const char *begin, int flags) __THROWNL; +/* A representation of a directory entry which does not depend on the + layout of struct dirent, or the size of ino_t. */ +struct readdir_result +{ + const char *name; +# if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE + uint8_t type; +# endif + bool skip_entry; +}; + +# if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE +/* Initializer based on the d_type member of struct dirent. */ +# define D_TYPE_TO_RESULT(source) (source)->d_type, + +/* True if the directory entry D might be a symbolic link. */ +static bool +readdir_result_might_be_symlink (struct readdir_result d) +{ + return d.type == DT_UNKNOWN || d.type == DT_LNK; +} + +/* True if the directory entry D might be a directory. */ +static bool +readdir_result_might_be_dir (struct readdir_result d) +{ + return d.type == DT_DIR || readdir_result_might_be_symlink (d); +} +# else /* defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE */ +# define D_TYPE_TO_RESULT(source) + +/* If we do not have type information, symbolic links and directories + are always a possibility. */ + +static bool +readdir_result_might_be_symlink (struct readdir_result d) +{ + return true; +} + +static bool +readdir_result_might_be_dir (struct readdir_result d) +{ + return true; +} + +# endif /* defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE */ + +# if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__ +/* Initializer for skip_entry. POSIX does not require that the d_ino + field be present, and some systems do not provide it. */ +# define D_INO_TO_RESULT(source) false, +# else +# define D_INO_TO_RESULT(source) (source)->d_ino == 0, +# endif + +/* Construct an initializer for a struct readdir_result object from a + struct dirent *. No copy of the name is made. */ +#define READDIR_RESULT_INITIALIZER(source) \ + { \ + source->d_name, \ + D_TYPE_TO_RESULT (source) \ + D_INO_TO_RESULT (source) \ + } + #endif /* !defined _LIBC || !defined GLOB_ONLY_P */ +/* Call gl_readdir on STREAM. This macro can be overridden to reduce + type safety if an old interface version needs to be supported. */ +#ifndef GL_READDIR +# define GL_READDIR(pglob, stream) ((pglob)->gl_readdir (stream)) +#endif + +/* Extract name and type from directory entry. No copy of the name is + made. If SOURCE is NULL, result name is NULL. Keep in sync with + convert_dirent64 below. */ +static struct readdir_result +convert_dirent (const struct dirent *source) +{ + if (source == NULL) + { + struct readdir_result result = { NULL, }; + return result; + } + struct readdir_result result = READDIR_RESULT_INITIALIZER (source); + return result; +} + +#ifndef COMPILE_GLOB64 +/* Like convert_dirent, but works on struct dirent64 instead. Keep in + sync with convert_dirent above. */ +static struct readdir_result +convert_dirent64 (const struct dirent64 *source) +{ + if (source == NULL) + { + struct readdir_result result = { NULL, }; + return result; + } + struct readdir_result result = READDIR_RESULT_INITIALIZER (source); + return result; +} +#endif + + #ifndef attribute_hidden # define attribute_hidden #endif @@ -1546,55 +1590,36 @@ glob_in_dir (const char *pattern, const char *directory, int flags, while (1) { - const char *name; -#if defined _LIBC && !defined COMPILE_GLOB64 - struct dirent64 *d; - union - { - struct dirent64 d64; - char room [offsetof (struct dirent64, d_name[0]) - + NAME_MAX + 1]; - } - d64buf; - - if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)) - { - struct dirent *d32 = (*pglob->gl_readdir) (stream); - if (d32 != NULL) - { - CONVERT_DIRENT_DIRENT64 (&d64buf.d64, d32); - d = &d64buf.d64; - } - else - d = NULL; - } - else - d = __readdir64 (stream); + struct readdir_result d; + { + if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)) + d = convert_dirent (GL_READDIR (pglob, stream)); + else + { +#ifdef COMPILE_GLOB64 + d = convert_dirent (__readdir (stream)); #else - struct dirent *d = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0) - ? ((struct dirent *) - (*pglob->gl_readdir) (stream)) - : __readdir (stream)); + d = convert_dirent64 (__readdir64 (stream)); #endif - if (d == NULL) + } + } + if (d.name == NULL) break; - if (! REAL_DIR_ENTRY (d)) + if (d.skip_entry) continue; /* If we shall match only directories use the information provided by the dirent call if possible. */ - if ((flags & GLOB_ONLYDIR) && !DIRENT_MIGHT_BE_DIR (d)) + if ((flags & GLOB_ONLYDIR) && !readdir_result_might_be_dir (d)) continue; - name = d->d_name; - - if (fnmatch (pattern, name, fnm_flags) == 0) + if (fnmatch (pattern, d.name, fnm_flags) == 0) { /* If the file we found is a symlink we have to make sure the target file exists. */ - if (!DIRENT_MIGHT_BE_SYMLINK (d) - || link_exists_p (dfd, directory, dirlen, name, pglob, - flags)) + if (!readdir_result_might_be_symlink (d) + || link_exists_p (dfd, directory, dirlen, d.name, + pglob, flags)) { if (cur == names->count) { @@ -1614,7 +1639,7 @@ glob_in_dir (const char *pattern, const char *directory, int flags, names = newnames; cur = 0; } - names->name[cur] = strdup (d->d_name); + names->name[cur] = strdup (d.name); if (names->name[cur] == NULL) goto memory_error; ++cur; diff --git a/sysdeps/unix/sysv/linux/i386/glob64.c b/sysdeps/unix/sysv/linux/i386/glob64.c index b4fcd1a73c..802c957d6c 100644 --- a/sysdeps/unix/sysv/linux/i386/glob64.c +++ b/sysdeps/unix/sysv/linux/i386/glob64.c @@ -1,3 +1,21 @@ +/* Two glob variants with 64-bit support, for dirent64 and __olddirent64. + Copyright (C) 1998-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + #include #include #include @@ -38,11 +56,15 @@ int __old_glob64 (const char *__pattern, int __flags, #undef dirent #define dirent __old_dirent64 +#undef GL_READDIR +# define GL_READDIR(pglob, stream) \ + ((struct __old_dirent64 *) (pglob)->gl_readdir (stream)) #undef __readdir #define __readdir(dirp) __old_readdir64 (dirp) #undef glob #define glob(pattern, flags, errfunc, pglob) \ __old_glob64 (pattern, flags, errfunc, pglob) +#define convert_dirent __old_convert_dirent #define glob_in_dir __old_glob_in_dir #define GLOB_ATTRIBUTE attribute_compat_text_section -- cgit v1.2.3-70-g09d2