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| author | Denys Vlasenko | 2015-02-05 21:00:17 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2015-02-05 21:00:17 +0100 |
| commit | 7e66102f762a7d80715f0c7e5925433256b78cee (patch) | |
| tree | ab0a28074aa6b4fe2f9dfff6e9db7ab3059caa6b | |
| parent | a14fa79592eadec0d5e296c66e79dfe36ce798c7 (diff) | |
| download | busybox-7e66102f762a7d80715f0c7e5925433256b78cee.zip busybox-7e66102f762a7d80715f0c7e5925433256b78cee.tar.gz | |
ash: fix a SEGV case in an invalid heredoc
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | shell/ash.c | 15 | ||||
| -rw-r--r-- | shell/ash_test/ash-heredoc/heredoc1.right | 1 | ||||
| -rwxr-xr-x | shell/ash_test/ash-heredoc/heredoc1.tests | 3 |
3 files changed, 15 insertions, 4 deletions
diff --git a/shell/ash.c b/shell/ash.c index c5ad969..0f9f73e 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -10556,7 +10556,7 @@ static union node *andor(void); static union node *pipeline(void); static union node *parse_command(void); static void parseheredoc(void); -static char peektoken(void); +static char nexttoken_ends_list(void); static int readtoken(void); static union node * @@ -10566,7 +10566,7 @@ list(int nlflag) int tok; checkkwd = CHKNL | CHKKWD | CHKALIAS; - if (nlflag == 2 && peektoken()) + if (nlflag == 2 && nexttoken_ends_list()) return NULL; n1 = NULL; for (;;) { @@ -10608,8 +10608,15 @@ list(int nlflag) tokpushback = 1; } checkkwd = CHKNL | CHKKWD | CHKALIAS; - if (peektoken()) + if (nexttoken_ends_list()) { + /* Testcase: "<<EOF; then <W". + * It used to segfault w/o this check: + */ + if (heredoclist) { + raise_error_unexpected_syntax(-1); + } return n1; + } break; case TEOF: if (heredoclist) @@ -12046,7 +12053,7 @@ readtoken(void) } static char -peektoken(void) +nexttoken_ends_list(void) { int t; diff --git a/shell/ash_test/ash-heredoc/heredoc1.right b/shell/ash_test/ash-heredoc/heredoc1.right new file mode 100644 index 0000000..895f5ee --- /dev/null +++ b/shell/ash_test/ash-heredoc/heredoc1.right @@ -0,0 +1 @@ +heredoc1.tests: line 3: syntax error: unexpected "then" diff --git a/shell/ash_test/ash-heredoc/heredoc1.tests b/shell/ash_test/ash-heredoc/heredoc1.tests new file mode 100755 index 0000000..a912a67 --- /dev/null +++ b/shell/ash_test/ash-heredoc/heredoc1.tests @@ -0,0 +1,3 @@ +# We used to SEGV on this: + +<<EOF; then <W |