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| author | Victor Michel <victor@optimyze.cloud> | 2021-06-11 05:44:00 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2021-06-14 22:13:47 +0000 |
| commit | 8a5a6f46dc51597174d0044dcd3bdffa950ae65e (patch) | |
| tree | b45098d5bdbcfebea58a3acb1d437a86d531aed7 /src/debug/elf | |
| parent | 9d13f8d43e88a349762c61aee84614ac83dab521 (diff) | |
| download | go-8a5a6f46dc51597174d0044dcd3bdffa950ae65e.tar.xz | |
debug/elf: don't apply DWARF relocations for ET_EXEC binaries
Some ET_EXEC binaries might have relocations for non-loadable sections
like .debug_info. These relocations must not be applied, because:
* They may be incorrect
* The correct relocations were already applied at link time
Binaries in Linux Kernel debug packages like Fedora/Centos kernel-debuginfo
are such examples. Relocations for .debug_* sections are included in the
final binaries because they are compiled with --emit-relocs, but the resulting
relocations are incorrect and shouldn't be used when reading DWARF sections.
Fixes #46673
Change-Id: I2b4214f1584bfc243446d0eaee41512657325b95
GitHub-Last-Rev: 8350fad059e70422d13dfaa5bab7fb8a56c0f76f
GitHub-Pull-Request: golang/go#46698
Reviewed-on: https://go-review.googlesource.com/c/go/+/327009
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Diffstat (limited to 'src/debug/elf')
| -rw-r--r-- | src/debug/elf/file.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/debug/elf/file.go b/src/debug/elf/file.go index cd5bf8fab0..b25d8209e3 100644 --- a/src/debug/elf/file.go +++ b/src/debug/elf/file.go @@ -1164,6 +1164,13 @@ func (f *File) DWARF() (*dwarf.Data, error) { b = dbuf } + if f.Type == ET_EXEC { + // Do not apply relocations to DWARF sections for ET_EXEC binaries. + // Relocations should already be applied, and .rela sections may + // contain incorrect data. + return b, nil + } + for _, r := range f.Sections { if r.Type != SHT_RELA && r.Type != SHT_REL { continue |