diff options
| author | Horst Kronstorfer <hkronsto@frequentis.com> | 2012-02-07 10:02:53 +0100 |
|---|---|---|
| committer | Jon Loeliger <jdl@jdl.com> | 2012-02-16 06:43:51 -0600 |
| commit | a6e6c60e3a97a6b3a033cd052bb3740fd53cbf4c (patch) | |
| tree | f340f4db6218cf8729abd65cbb9944ad30608c69 /treesource.c | |
| parent | e280442e08fcbe8431dc85d836ff3ecc489932fb (diff) | |
| download | dtc-a6e6c60e3a97a6b3a033cd052bb3740fd53cbf4c.tar.gz | |
dtc: Fix zero-length input segfault
This patch fixes a segmentation fault caused by dereferencing a NULL
pointer (pos->file aka yylloc.file) in srcpos_string when the input
length is 0 (fe 'dtc </dev/null'.) Reason: yylloc.file is initialized
with 0 and the tokenizer, which updates yylloc.file via srcpos_update
doesn't get a chance to run on zero-length input.
Signed-off-by: Horst Kronstorfer <hkronsto@frequentis.com>
Diffstat (limited to 'treesource.c')
| -rw-r--r-- | treesource.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/treesource.c b/treesource.c index c09aafa..33eeba5 100644 --- a/treesource.c +++ b/treesource.c @@ -23,6 +23,7 @@ extern FILE *yyin; extern int yyparse(void); +extern YYLTYPE yylloc; struct boot_info *the_boot_info; int treesource_error; @@ -34,6 +35,7 @@ struct boot_info *dt_from_source(const char *fname) srcfile_push(fname); yyin = current_srcfile->f; + yylloc.file = current_srcfile; if (yyparse() != 0) die("Unable to parse input tree\n"); |