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From: gdb-buildbot@sergiodj.net To: gdb-testers@sourceware.org Subject: [binutils-gdb] PR25078, stack overflow in function find_abstract_instance Date: Mon, 14 Oct 2019 13:42:00 -0000 [thread overview] Message-ID: <063c511bd79281f33fd33f0964541a73511b9e2b@gdb-build> (raw) *** TEST RESULTS FOR COMMIT 063c511bd79281f33fd33f0964541a73511b9e2b *** commit 063c511bd79281f33fd33f0964541a73511b9e2b Author: Alan Modra <amodra@gmail.com> AuthorDate: Wed Oct 9 00:07:29 2019 +1030 Commit: Alan Modra <amodra@gmail.com> CommitDate: Wed Oct 9 00:20:28 2019 +1030 PR25078, stack overflow in function find_abstract_instance PR 25078 * dwarf2.c (find_abstract_instance): Delete orig_info_ptr, add recur_count. Error on recur_count reaching 100 rather than info_ptr matching orig_info_ptr. Adjust calls. diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 6062d38a28..cf5b372860 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,10 @@ +2019-10-08 Alan Modra <amodra@gmail.com> + + PR 25078 + * dwarf2.c (find_abstract_instance): Delete orig_info_ptr, add + recur_count. Error on recur_count reaching 100 rather than + info_ptr matching orig_info_ptr. Adjust calls. + 2019-10-07 Jozef Lawrynowicz <jozef.l@mittosystems.com> * elf32-msp430.c (elf32_msp430_merge_mspabi_attributes): Rename to.. diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 575b082e1d..d39f4fdfe4 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -2812,13 +2812,13 @@ static bfd_boolean comp_unit_maybe_decode_line_info (struct comp_unit *, struct dwarf2_debug *); static bfd_boolean -find_abstract_instance (struct comp_unit * unit, - bfd_byte * orig_info_ptr, - struct attribute * attr_ptr, - const char ** pname, - bfd_boolean * is_linkage, - char ** filename_ptr, - int * linenumber_ptr) +find_abstract_instance (struct comp_unit *unit, + struct attribute *attr_ptr, + unsigned int recur_count, + const char **pname, + bfd_boolean *is_linkage, + char **filename_ptr, + int *linenumber_ptr) { bfd *abfd = unit->abfd; bfd_byte *info_ptr; @@ -2829,6 +2829,14 @@ find_abstract_instance (struct comp_unit * unit, struct attribute attr; const char *name = NULL; + if (recur_count == 100) + { + _bfd_error_handler + (_("DWARF error: abstract instance recursion detected")); + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + /* DW_FORM_ref_addr can reference an entry in a different CU. It is an offset from the .debug_info section, not the current CU. */ if (attr_ptr->form == DW_FORM_ref_addr) @@ -2962,15 +2970,6 @@ find_abstract_instance (struct comp_unit * unit, info_ptr, info_ptr_end); if (info_ptr == NULL) break; - /* It doesn't ever make sense for DW_AT_specification to - refer to the same DIE. Stop simple recursion. */ - if (info_ptr == orig_info_ptr) - { - _bfd_error_handler - (_("DWARF error: abstract instance recursion detected")); - bfd_set_error (bfd_error_bad_value); - return FALSE; - } switch (attr.name) { case DW_AT_name: @@ -2984,7 +2983,7 @@ find_abstract_instance (struct comp_unit * unit, } break; case DW_AT_specification: - if (!find_abstract_instance (unit, info_ptr, &attr, + if (!find_abstract_instance (unit, &attr, recur_count + 1, &name, is_linkage, filename_ptr, linenumber_ptr)) return FALSE; @@ -3200,7 +3199,7 @@ scan_unit_for_symbols (struct comp_unit *unit) case DW_AT_abstract_origin: case DW_AT_specification: - if (!find_abstract_instance (unit, info_ptr, &attr, + if (!find_abstract_instance (unit, &attr, 0, &func->name, &func->is_linkage, &func->file,
next reply other threads:[~2019-10-14 13:42 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-10-14 13:42 gdb-buildbot [this message] 2019-10-14 13:42 ` Failures on Ubuntu-Aarch64-m64, branch master gdb-buildbot 2019-10-14 15:10 ` Failures on Ubuntu-Aarch64-native-extended-gdbserver-m64, " gdb-buildbot 2019-10-14 15:59 ` Failures on Ubuntu-Aarch64-native-gdbserver-m64, " gdb-buildbot 2019-10-20 10:25 ` Failures on Fedora-i686, " gdb-buildbot 2019-10-20 11:14 ` Failures on Fedora-x86_64-m32, " gdb-buildbot 2019-10-20 12:09 ` Failures on Fedora-x86_64-native-extended-gdbserver-m32, " gdb-buildbot 2019-10-20 12:52 ` Failures on Fedora-x86_64-native-extended-gdbserver-m64, " gdb-buildbot 2019-10-20 13:40 ` Failures on Fedora-x86_64-native-gdbserver-m64, " gdb-buildbot
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