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Revert "[llvm-readobj/elf] - Refine the code for broken PT_DYNAMIC segment diagnostic."

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This reverts commit 455d5a8a065b4b93df11d1696dc1546c403465a5.

It broke UBSan:
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap-ubsan/builds/21386/steps/check-llvm%20ubsan/logs/stdio

/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/tools/llvm-readobj/ELF/malformed-pt-dynamic.test:62:10: error: WARN3: expected string not found in input
# WARN3: error: '[[FILE]]': Invalid data was encountered while parsing the file
         ^
<stdin>:2:1: note: scanning from here
/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-readobj/ELFDumper.cpp:1956:46: runtime error: addition of unsigned offset to 0x0000020c5b30 overflowed to 0x0000020c5b2f
^
<stdin>:2:1: note: with "FILE" equal to "/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/test/tools/llvm-readobj/ELF/Output/malformed-pt-dynamic\\.test\\.tmp3"
/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-readobj/ELFDumper.cpp:1956:46: runtime error: addition of unsigned offset to 0x0000020c5b30 overflowed to 0x0000020c5b2f
^
<stdin>:2:117: note: possible intended match here
/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/tools/llvm-readobj/ELFDumper.cpp:1956:46: runtime error: addition of unsigned offset to 0x0000020c5b30 overflowed to 0x0000020c5b2f
                                                                                                                    ^
Input file: <stdin>
Check file: /b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/test/tools/llvm-readobj/ELF/malformed-pt-dynamic.test
This commit is contained in:
Georgii Rymar 2020-08-20 14:04:30 +03:00
parent fdacd25874
commit e7c1ab412e
2 changed files with 5 additions and 70 deletions
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69
test/tools/llvm-readobj/ELF/malformed-pt-dynamic.test
View File

@ -51,74 +51,11 @@
# WARN2-NOHEADERS: warning: '[[FILE]]': PT_DYNAMIC segment offset (0x1119) + file size (0x10) exceeds the size of the file (0x1118)
## Case C: test we report a warning when the offset + the file size of the PT_DYNAMIC is so large a
## value that it overflows the platform address size type.
# RUN: yaml2obj %s -DOFFSET=0xffffffffffffffff -o %t3
# RUN: not llvm-readobj %t3 --dynamic-table 2>&1 | FileCheck -DFILE=%t3 %s --check-prefix=WARN3
# RUN: not llvm-readelf %t3 --dynamic-table 2>&1 | FileCheck -DFILE=%t3 %s --check-prefix=WARN3
# WARN3: warning: '[[FILE]]': PT_DYNAMIC segment offset (0xffffffffffffffff) + file size (0x10) exceeds the size of the file (0x1130)
# WARN3: error: '[[FILE]]': Invalid data was encountered while parsing the file
# RUN: yaml2obj %s -DNOHEADERS=true -DOFFSET=0xffffffffffffffff -o %t3.noheaders
# RUN: llvm-readobj %t3.noheaders --dynamic-table 2>&1 | \
# RUN: FileCheck -DFILE=%t3.noheaders %s --check-prefix=WARN3-NOHEADERS
# RUN: llvm-readelf %t3.noheaders --dynamic-table 2>&1 | \
# RUN: FileCheck -DFILE=%t3.noheaders %s --check-prefix=WARN3-NOHEADERS
# WARN3-NOHEADERS: warning: '[[FILE]]': PT_DYNAMIC segment offset (0xffffffffffffffff) + file size (0x10) exceeds the size of the file (0x1118)
# RUN: yaml2obj %s -DFILESIZE=0xffffffffffffffff -o %t4
# RUN: llvm-readobj %t4 --dynamic-table 2>&1 | FileCheck -DFILE=%t4 %s --check-prefix=WARN4
# RUN: llvm-readelf %t4 --dynamic-table 2>&1 | FileCheck -DFILE=%t4 %s --check-prefix=WARN4
# WARN4: warning: '[[FILE]]': PT_DYNAMIC segment offset (0x1000) + file size (0xffffffffffffffff) exceeds the size of the file (0x1130)
# RUN: yaml2obj %s -DNOHEADERS=true -DFILESIZE=0xffffffffffffffff -o %t4.noheaders
# RUN: llvm-readobj %t4.noheaders --dynamic-table 2>&1 | \
# RUN: FileCheck -DFILE=%t4.noheaders %s --check-prefix=WARN4-NOHEADERS
# RUN: llvm-readelf %t4.noheaders --dynamic-table 2>&1 | \
# RUN: FileCheck -DFILE=%t4.noheaders %s --check-prefix=WARN4-NOHEADERS
# WARN4-NOHEADERS: warning: '[[FILE]]': PT_DYNAMIC segment offset (0x1000) + file size (0xffffffffffffffff) exceeds the size of the file (0x1118)
## Case D: the same as "Case C", but for a 32-bit object.
# RUN: yaml2obj %s -DBITS=32 -DOFFSET=0xffffffff -o %t5
# RUN: not llvm-readobj %t5 --dynamic-table 2>&1 | FileCheck -DFILE=%t5 %s --check-prefix=WARN5
# RUN: not llvm-readelf %t5 --dynamic-table 2>&1 | FileCheck -DFILE=%t5 %s --check-prefix=WARN5
# WARN5: warning: '[[FILE]]': PT_DYNAMIC segment offset (0xffffffff) + file size (0x8) exceeds the size of the file (0x10c8)
# WARN5: error: '[[FILE]]': Invalid data was encountered while parsing the file
# RUN: yaml2obj %s -DNOHEADERS=true -DBITS=32 -DOFFSET=0xffffffff -o %t5.noheaders
# RUN: llvm-readobj %t5.noheaders --dynamic-table 2>&1 | \
# RUN: FileCheck -DFILE=%t5.noheaders %s --check-prefix=WARN5-NOHEADERS
# RUN: llvm-readelf %t5.noheaders --dynamic-table 2>&1 | \
# RUN: FileCheck -DFILE=%t5.noheaders %s --check-prefix=WARN5-NOHEADERS
# WARN5-NOHEADERS: warning: '[[FILE]]': PT_DYNAMIC segment offset (0xffffffff) + file size (0x8) exceeds the size of the file (0x10ac)
# RUN: yaml2obj %s -DBITS=32 -DFILESIZE=0xffffffff -o %t6
# RUN: llvm-readobj %t6 --dynamic-table 2>&1 | FileCheck -DFILE=%t6 %s --check-prefix=WARN6
# RUN: llvm-readelf %t6 --dynamic-table 2>&1 | FileCheck -DFILE=%t6 %s --check-prefix=WARN6
# WARN6: warning: '[[FILE]]': PT_DYNAMIC segment offset (0x1000) + file size (0xffffffff) exceeds the size of the file (0x10c8)
# RUN: yaml2obj %s -DNOHEADERS=true -DBITS=32 -DFILESIZE=0xffffffff -o %t6.noheaders
# RUN: llvm-readobj %t6.noheaders --dynamic-table 2>&1 | \
# RUN: FileCheck -DFILE=%t6.noheaders %s --check-prefix=WARN6-NOHEADERS
# RUN: llvm-readelf %t6.noheaders --dynamic-table 2>&1 | \
# RUN: FileCheck -DFILE=%t6.noheaders %s --check-prefix=WARN6-NOHEADERS
# WARN6-NOHEADERS: warning: '[[FILE]]': PT_DYNAMIC segment offset (0x1000) + file size (0xffffffff) exceeds the size of the file (0x10ac)
--- !ELF
FileHeader:
Class: ELFCLASS[[BITS=64]]
Data: ELFDATA2LSB
Type: ET_EXEC
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_EXEC
Sections:
- Name: .dynamic
Type: SHT_DYNAMIC

6
tools/llvm-readobj/ELFDumper.cpp
View File

@ -1892,10 +1892,8 @@ ELFDumper<ELFT>::findDynamic(const ELFFile<ELFT> *Obj) {
break;
}
if (DynamicPhdr && ((DynamicPhdr->p_offset + DynamicPhdr->p_filesz >
ObjF->getMemoryBufferRef().getBufferSize()) ||
(DynamicPhdr->p_offset + DynamicPhdr->p_filesz <
DynamicPhdr->p_offset))) {
if (DynamicPhdr && DynamicPhdr->p_offset + DynamicPhdr->p_filesz >
ObjF->getMemoryBufferRef().getBufferSize()) {
reportUniqueWarning(createError(
"PT_DYNAMIC segment offset (0x" +
Twine::utohexstr(DynamicPhdr->p_offset) + ") + file size (0x" +