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* [binutils-gdb] asan: segfault in coff_write_auxent_fname
@ 2022-08-06 9:13 Alan Modra
0 siblings, 0 replies; only message in thread
From: Alan Modra @ 2022-08-06 9:13 UTC (permalink / raw)
To: bfd-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=431d48ef288983b62df2afb435dc8c6101a34cf8
commit 431d48ef288983b62df2afb435dc8c6101a34cf8
Author: Alan Modra <amodra@gmail.com>
Date: Sat Aug 6 17:36:32 2022 +0930
asan: segfault in coff_write_auxent_fname
More fuzzed input file nonsense.
* coffgen.c (coff_write_symbol): Don't call coff_write_auxent_fname
when extrap is NULL.
Diff:
---
bfd/coffgen.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/bfd/coffgen.c b/bfd/coffgen.c
index 07b3fb446aa..4d2b82e4a6f 100644
--- a/bfd/coffgen.c
+++ b/bfd/coffgen.c
@@ -1058,7 +1058,8 @@ coff_write_symbol (bfd *abfd,
/* Adjust auxent only if this isn't the filename
auxiliary entry. */
if (native->u.syment.n_sclass == C_FILE
- && (native + j + 1)->u.auxent.x_file.x_ftype)
+ && (native + j + 1)->u.auxent.x_file.x_ftype
+ && (native + j + 1)->extrap)
coff_write_auxent_fname (abfd, (char *) (native + j + 1)->extrap,
&(native + j + 1)->u.auxent, strtab, hash);
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