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| author | Alan Modra <amodra@gmail.com> | 2020-08-27 13:25:31 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2020-08-27 21:56:33 +0930 |
| commit | cd570d497efca7b71ca999cb80d24bfcea5181ac (patch) | |
| tree | f5cc593b55bd2736b349a5e924e3238677fd5538 | |
| parent | 2ac865acf01270240fecfb27180e65fc55513d83 (diff) | |
| download | gdb-cd570d497efca7b71ca999cb80d24bfcea5181ac.zip gdb-cd570d497efca7b71ca999cb80d24bfcea5181ac.tar.gz gdb-cd570d497efca7b71ca999cb80d24bfcea5181ac.tar.bz2 | |
PR26462 UBSAN: reloc.c:473 shift exponent 4294967295
PR 26462
* reloc.c (bfd_check_overflow): Return early if zero bitsize.
| -rw-r--r-- | bfd/ChangeLog | 5 | ||||
| -rw-r--r-- | bfd/reloc.c | 3 |
2 files changed, 8 insertions, 0 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 18ded26..6d3ba69 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,10 @@ 2020-08-27 Alan Modra <amodra@gmail.com> + PR 26462 + * reloc.c (bfd_check_overflow): Return early if zero bitsize. + +2020-08-27 Alan Modra <amodra@gmail.com> + * elf32-arm.c (elf32_arm_final_link_relocate): Don't segfault on sym_sec not being output. diff --git a/bfd/reloc.c b/bfd/reloc.c index 9aba84c..7d3479a 100644 --- a/bfd/reloc.c +++ b/bfd/reloc.c @@ -466,6 +466,9 @@ bfd_check_overflow (enum complain_overflow how, bfd_vma fieldmask, addrmask, signmask, ss, a; bfd_reloc_status_type flag = bfd_reloc_ok; + if (bitsize == 0) + return flag; + /* Note: BITSIZE should always be <= ADDRSIZE, but in case it's not, we'll be permissive: extra bits in the field mask will automatically extend the address mask for purposes of the |