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[Bug libc/21357] New: unwind-dw2-fde deadlock when using AddressSanitizer
- From: "rabinv at axis dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 06 Apr 2017 19:52:16 +0000
- Subject: [Bug libc/21357] New: unwind-dw2-fde deadlock when using AddressSanitizer
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=21357
Bug ID: 21357
Summary: unwind-dw2-fde deadlock when using AddressSanitizer
Product: glibc
Version: 2.26
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: rabinv at axis dot com
CC: drepper.fsp at gmail dot com
Target Milestone: ---
__deregister_frame_info_bases() calls free() while holding a mutex which is
also used from _Unwind_Find_FDE(). This leads to a deadlock if
AddressSanitizer uses _Unwind_Backtrace() from its free() implementation. Seen
on MIPS.
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