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From: "anton_nix at mail dot ru" <sourceware-bugzilla@sourceware.org> To: gdb-prs@sourceware.org Subject: [Bug gdb/18929] New: NULL deref on throw in cp_print_value_fields Date: Mon, 07 Sep 2015 01:41:00 -0000 [thread overview] Message-ID: <bug-18929-4717@http.sourceware.org/bugzilla/> (raw) https://sourceware.org/bugzilla/show_bug.cgi?id=18929 Bug ID: 18929 Summary: NULL deref on throw in cp_print_value_fields Product: gdb Version: 7.10 Status: NEW Severity: normal Priority: P2 Component: gdb Assignee: unassigned at sourceware dot org Reporter: anton_nix at mail dot ru Target Milestone: --- Created attachment 8583 --> https://sourceware.org/bugzilla/attachment.cgi?id=8583&action=edit Patch I think i found a bug gdb-7.10/gdb/cp-valprint.c:316 struct value *v = NULL; TRY { v = value_static_field (type, i); } CATCH ... END_CATCH cp_print_static_field (TYPE_FIELD_TYPE (type, i), v, stream, recurse + 1, options); Assume that throw happend in value_static_field, then "v" would still be NULL, but cp_print_static_field expects "v" to be non-zero. This situation would lead to SEGFAULT Propose to place "v" and cp_print_static_field call into TRY block Digging in git history, I found out that, if v == NULL before cp_print_static_field call, then val_print_optimized_out happend (commit 686d4defdf4a343d4b700b8b544cd40c4f16b0d1). But in my case variable was not optimized out, and value_static_field throws. P.S.: I was debugging remote linux application from windows host. Patch to 7.10 attached -- You are receiving this mail because: You are on the CC list for the bug.
next reply other threads:[~2015-09-07 1:41 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-09-07 1:41 anton_nix at mail dot ru [this message] 2015-09-07 1:45 ` [Bug gdb/18929] " anton_nix at mail dot ru 2015-09-07 1:51 ` anton_nix at mail dot ru 2015-10-02 7:07 ` matteo.settenvini at yatta dot de
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