| Summary: | glibc: recompile glibc to fix incorrect CFI information on i386 | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Florian Weimer <fweimer> |
| Component: | glibc | Assignee: | Carlos O'Donell <codonell> |
| Status: | CLOSED ERRATA | QA Contact: | Sergey Kolosov <skolosov> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.5 | CC: | ashankar, briang, codonell, fweimer, lmiksik, mnewsome, pfrankli, skolosov |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | glibc-2.17-221.el7 | Doc Type: | No Doc Update |
| Doc Text: |
undefined
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-04-10 14:04:32 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Bug Depends On: | 1529981 | ||
| Bug Blocks: | |||
Presence of the bug confirmed in glibc-2.17-220.el7.i686: $ build/tst-thread-exit-clobber info: unsigned int, direct pthread_exit call tests/tst-thread-exit-clobber.cc:80: numeric comparison failure left: 4148288912 (0xf741dd90); from: value right: 1600833940 (0x5f6ac994); from: magic_values.v2 info: double, direct pthread_exit call info: unsigned int, indirect pthread_exit call info: double, indirect pthread_exit call error: 1 test failures We should backport the upstream test for this: commit 579396ee082565ab5f42ff166a264891223b7b82 Author: Florian Weimer <fweimer@redhat.com> Date: Mon Jan 8 14:57:25 2018 +0100 nptl: Add test for callee-saved register restore in pthread_exit Also depends on a support/ update (we should just rebase): commit dabd75b6a1180c2ca6a6f966f08cc00e8e72cce9 Author: Florian Weimer <fweimer@redhat.com> Date: Mon Jan 8 14:39:51 2018 +0100 support: Define support_static_assert for use with C and C++ And update TEST_COMPARE to use it, to make it usable from C++. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2018:0805 |
glibc-2.17-220.el7.i686 has incorrect unwind information in /lib/libpthread.so.0: 0000d5b0 <__pthread_unwind>: d5b0: 57 push %edi d5b1: 56 push %esi d5b2: 53 push %ebx d5b3: 56 push %esi d5b4: 5e pop %esi d5b5: 31 d2 xor %edx,%edx d5b7: e8 14 7e ff ff call 53d0 <__x86.get_pc_thunk.bx> d5bc: 81 c3 44 aa 00 00 add $0xaa44,%ebx d5c2: 65 8b 35 08 00 00 00 mov %gs:0x8,%esi d5c9: 89 c7 mov %eax,%edi d5cb: 83 ec 10 sub $0x10,%esp d5ce: 31 c0 xor %eax,%eax d5d0: 65 a3 50 02 00 00 mov %eax,%gs:0x250 d5d6: 65 89 15 54 02 00 00 mov %edx,%gs:0x254 d5dd: 8d 83 50 54 ff ff lea -0xabb0(%ebx),%eax d5e3: 65 a3 58 02 00 00 mov %eax,%gs:0x258 d5e9: 8d 83 90 54 ff ff lea -0xab70(%ebx),%eax d5ef: 81 c6 50 02 00 00 add $0x250,%esi d5f5: 89 7c 24 08 mov %edi,0x8(%esp) d5f9: 89 44 24 04 mov %eax,0x4(%esp) d5fd: 89 34 24 mov %esi,(%esp) d600: e8 bb 22 00 00 call f8c0 <_Unwind_ForcedUnwind> d605: e8 c6 70 ff ff call 46d0 <abort@plt> d60a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi 0000280c 00000028 00002810 FDE cie=00000000 pc=0000d5b0..0000d60a DW_CFA_advance_loc: 1 to 0000d5b1 DW_CFA_def_cfa_offset: 8 DW_CFA_offset: r7 (edi) at cfa-8 DW_CFA_advance_loc: 1 to 0000d5b2 DW_CFA_def_cfa_offset: 12 DW_CFA_offset: r6 (esi) at cfa-12 DW_CFA_advance_loc: 1 to 0000d5b3 DW_CFA_def_cfa_offset: 16 DW_CFA_offset: r3 (ebx) at cfa-16 DW_CFA_advance_loc: 1 to 0000d5b4 DW_CFA_def_cfa_offset: 20 DW_CFA_offset: r6 (esi) at cfa-20 DW_CFA_advance_loc: 1 to 0000d5b5 DW_CFA_restore: r6 (esi) DW_CFA_def_cfa_offset: 16 DW_CFA_advance_loc: 25 to 0000d5ce DW_CFA_def_cfa_offset: 32 There is a DW_CFA_restore for r6 (esi) at offset d5b5 (claiming that the register has the same value in the caller), but the register is overwritten at offset d5c9, so that the unwinder does not restore the original register value. A simple recompilation of glibc should suffice to address this once bug 1529981 in gcc is fixed.