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| author | Chris Metcalf <cmetcalf@ezchip.com> | 2014-12-22 14:50:26 -0500 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@ezchip.com> | 2014-12-22 14:50:26 -0500 |
| commit | 0dacd7a3b9401f7eb7160cf79231a4573773c5da (patch) | |
| tree | 892983bc4ed9757a26a8c0217671ef6dfea94c0c | |
| parent | 929011700ce09f2bb4f6f650ae95b6eb68145deb (diff) | |
| download | glibc-0dacd7a3b9401f7eb7160cf79231a4573773c5da.tar.gz glibc-0dacd7a3b9401f7eb7160cf79231a4573773c5da.tar.xz glibc-0dacd7a3b9401f7eb7160cf79231a4573773c5da.zip | |
tilegx: remove implicit boolean conversion in strstr.
[BZ #17746] The __builtin_expect() truncated a uint64_t to a 32-bit long in ILP32 mode, discarding the high 32 bits, and potentially missing the NUL terminator that we were searching for with SIMD operations. Explicitly compare to zero to fix the problem.
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | sysdeps/tile/tilegx/strstr.c | 2 |
3 files changed, 8 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog index 4ad8b90161..77abebf478 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2014-12-22 Chris Metcalf <cmetcalf@ezchip.com> + + [BZ #17746] + * sysdeps/tile/tilegx/strstr.c (STRSTR2): Remove implicit boolean + conversion. + 2014-12-22 Steve Ellcey <sellcey@imgtec.com> * sysdeps/unix/mips/sysdep.h (__mips_isa_rev): Set diff --git a/NEWS b/NEWS index cf0756b2e0..56dfff03bf 100644 --- a/NEWS +++ b/NEWS @@ -15,7 +15,7 @@ Version 2.21 17522, 17555, 17570, 17571, 17572, 17573, 17574, 17581, 17582, 17583, 17584, 17585, 17589, 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17647, 17653, 17657, 17664, 17665, 17668, 17682, 17717, 17719, - 17722, 17724, 17725, 17733, 17744, 17745. + 17722, 17724, 17725, 17733, 17744, 17745, 17746. * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag under certain input conditions resulting in the execution of a shell for diff --git a/sysdeps/tile/tilegx/strstr.c b/sysdeps/tile/tilegx/strstr.c index d04f12910d..de5adaff91 100644 --- a/sysdeps/tile/tilegx/strstr.c +++ b/sysdeps/tile/tilegx/strstr.c @@ -154,7 +154,7 @@ STRSTR2 (const char *haystack_start, const char *needle) /* Look for a terminating '\0'. */ zero_matches = __insn_v1cmpeqi (v, 0); uint64_t byte1_matches = __insn_v1cmpeq (v, byte1); - if (__builtin_expect (zero_matches, 0)) + if (__builtin_expect (zero_matches != 0, 0)) { /* This is the last vector. Don't worry about matches crossing into the next vector. Shift the second byte |