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* [Bug sanitizer/64741] New: Incorrect size of UBSan type descriptors @ 2015-01-23 9:42 y.gribov at samsung dot com 2015-01-23 9:54 ` [Bug sanitizer/64741] " y.gribov at samsung dot com ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: y.gribov at samsung dot com @ 2015-01-23 9:42 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64741 Bug ID: 64741 Summary: Incorrect size of UBSan type descriptors Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: sanitizer Assignee: unassigned at gcc dot gnu.org Reporter: y.gribov at samsung dot com CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org, jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, ryabinin.a.a at gmail dot com Created attachment 34540 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34540&action=edit Proposed patch UBSan uses incomplete type for all UBSan type descriptors: struct { short __typekind; short __typeinfo; char __typename[]; }; and this causes DECL_SIZE to return invalid (too short) values for generated globals. This later causes ASan to report invalid (again, too short) size to __asan_register_globals when UBSan is enabled together with ASan. This may not be a problem for userspace (because only libubsan accesses these descriptors and it's not sanitized) but causes false positives for kernel (https://lkml.org/lkml/2015/1/22/670). I attach a silly fix - if it looks more or less fine, I'll do the regtesting and fw to gcc-patches. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug sanitizer/64741] Incorrect size of UBSan type descriptors 2015-01-23 9:42 [Bug sanitizer/64741] New: Incorrect size of UBSan type descriptors y.gribov at samsung dot com @ 2015-01-23 9:54 ` y.gribov at samsung dot com 2015-01-27 10:02 ` ygribov at gcc dot gnu.org 2015-04-17 7:44 ` y.gribov at samsung dot com 2 siblings, 0 replies; 4+ messages in thread From: y.gribov at samsung dot com @ 2015-01-23 9:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64741 --- Comment #1 from Yury Gribov <y.gribov at samsung dot com> --- *** Bug 64742 has been marked as a duplicate of this bug. *** ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug sanitizer/64741] Incorrect size of UBSan type descriptors 2015-01-23 9:42 [Bug sanitizer/64741] New: Incorrect size of UBSan type descriptors y.gribov at samsung dot com 2015-01-23 9:54 ` [Bug sanitizer/64741] " y.gribov at samsung dot com @ 2015-01-27 10:02 ` ygribov at gcc dot gnu.org 2015-04-17 7:44 ` y.gribov at samsung dot com 2 siblings, 0 replies; 4+ messages in thread From: ygribov at gcc dot gnu.org @ 2015-01-27 10:02 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64741 --- Comment #3 from ygribov at gcc dot gnu.org --- Author: ygribov Date: Tue Jan 27 09:58:00 2015 New Revision: 220159 URL: https://gcc.gnu.org/viewcvs?rev=220159&root=gcc&view=rev Log: 2015-01-27 Jakub Jelinek <jakub@redhat.com> Yury Gribov <y.gribov@samsung.com> PR ubsan/64741 * ubsan.c (ubsan_source_location): Refactor code. (ubsan_type_descriptor): Update type size. Refactor code. Modified: trunk/gcc/ChangeLog trunk/gcc/ubsan.c ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug sanitizer/64741] Incorrect size of UBSan type descriptors 2015-01-23 9:42 [Bug sanitizer/64741] New: Incorrect size of UBSan type descriptors y.gribov at samsung dot com 2015-01-23 9:54 ` [Bug sanitizer/64741] " y.gribov at samsung dot com 2015-01-27 10:02 ` ygribov at gcc dot gnu.org @ 2015-04-17 7:44 ` y.gribov at samsung dot com 2 siblings, 0 replies; 4+ messages in thread From: y.gribov at samsung dot com @ 2015-04-17 7:44 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64741 Yury Gribov <y.gribov at samsung dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED --- Comment #4 from Yury Gribov <y.gribov at samsung dot com> --- . ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-04-17 7:44 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2015-01-23 9:42 [Bug sanitizer/64741] New: Incorrect size of UBSan type descriptors y.gribov at samsung dot com 2015-01-23 9:54 ` [Bug sanitizer/64741] " y.gribov at samsung dot com 2015-01-27 10:02 ` ygribov at gcc dot gnu.org 2015-04-17 7:44 ` y.gribov at samsung dot com
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