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From: Alan Modra <>
Subject: [binutils-gdb] asan: segfault in coff_write_auxent_fname
Date: Sat,  6 Aug 2022 09:13:58 +0000 (GMT)	[thread overview]
Message-ID: <> (raw);h=431d48ef288983b62df2afb435dc8c6101a34cf8

commit 431d48ef288983b62df2afb435dc8c6101a34cf8
Author: Alan Modra <>
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.

 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);

                 reply	other threads:[~2022-08-06  9:13 UTC|newest]

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