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ash: in tryexec(), ensure we don't try to run embedded scripts as applets

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Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ron Yorston 2018-11-01 11:45:03 +01:00 committed by Denys Vlasenko
parent 151de441e7
commit ca82b5354f
1 changed files with 8 additions and 0 deletions
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8
shell/ash.c
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@ -8017,6 +8017,10 @@ tryexec(IF_FEATURE_SH_STANDALONE(int applet_no,) const char *cmd, char **argv, c
{
#if ENABLE_FEATURE_SH_STANDALONE
if (applet_no >= 0) {
# if NUM_SCRIPTS > 0
if (applet_no >= NUM_APPLETS)
goto run_script;
# endif
if (APPLET_IS_NOEXEC(applet_no)) {
clearenv();
while (*envp)
@ -8039,7 +8043,11 @@ tryexec(IF_FEATURE_SH_STANDALONE(int applet_no,) const char *cmd, char **argv, c
#else
execve(cmd, argv, envp);
#endif
if (cmd != bb_busybox_exec_path && errno == ENOEXEC) {
#if ENABLE_FEATURE_SH_STANDALONE && NUM_SCRIPTS > 0
run_script:
#endif
/* Run "cmd" as a shell script:
* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
* "If the execve() function fails with ENOEXEC, the shell