BASH PATCH REPORT ================= Bash-Release: 4.2 Patch-ID: bash42-048 Bug-Reported-by: Stephane Chazelas Bug-Reference-ID: Bug-Reference-URL: Bug-Description: Under certain circumstances, bash will execute user code while processing the environment for exported function definitions. Patch (apply with `patch -p0'): *** ../bash-4.2.47/builtins/common.h 2010-05-30 18:31:51.000000000 -0400 --- builtins/common.h 2014-09-16 19:35:45.000000000 -0400 *************** *** 36,39 **** --- 36,41 ---- /* Flags for describe_command, shared between type.def and command.def */ + #define SEVAL_FUNCDEF 0x080 /* only allow function definitions */ + #define SEVAL_ONECMD 0x100 /* only allow a single command */ #define CDESC_ALL 0x001 /* type -a */ #define CDESC_SHORTDESC 0x002 /* command -V */ *** ../bash-4.2.47/builtins/evalstring.c 2010-11-23 08:22:15.000000000 -0500 --- builtins/evalstring.c 2014-09-16 19:35:45.000000000 -0400 *************** *** 262,265 **** --- 262,273 ---- struct fd_bitmap *bitmap; + if ((flags & SEVAL_FUNCDEF) && command->type != cm_function_def) + { + internal_warning ("%s: ignoring function definition attempt", from_file); + should_jump_to_top_level = 0; + last_result = last_command_exit_value = EX_BADUSAGE; + break; + } + bitmap = new_fd_bitmap (FD_BITMAP_SIZE); begin_unwind_frame ("pe_dispose"); *************** *** 322,325 **** --- 330,336 ---- dispose_fd_bitmap (bitmap); discard_unwind_frame ("pe_dispose"); + + if (flags & SEVAL_ONECMD) + break; } } *** ../bash-4.2.47/variables.c 2011-03-01 16:15:20.000000000 -0500 --- variables.c 2014-09-16 19:35:45.000000000 -0400 *************** *** 348,357 **** strcpy (temp_string + char_index + 1, string); ! parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST); ! ! /* Ancient backwards compatibility. Old versions of bash exported ! functions like name()=() {...} */ ! if (name[char_index - 1] == ')' && name[char_index - 2] == '(') ! name[char_index - 2] = '\0'; if (temp_var = find_function (name)) --- 348,355 ---- strcpy (temp_string + char_index + 1, string); ! /* Don't import function names that are invalid identifiers from the ! environment. */ ! if (legal_identifier (name)) ! parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD); if (temp_var = find_function (name)) *************** *** 362,369 **** else report_error (_("error importing function definition for `%s'"), name); - - /* ( */ - if (name[char_index - 1] == ')' && name[char_index - 2] == '\0') - name[char_index - 2] = '('; /* ) */ } #if defined (ARRAY_VARS) --- 360,363 ---- *** ../bash-4.2-patched/patchlevel.h Sat Jun 12 20:14:48 2010 --- patchlevel.h Thu Feb 24 21:41:34 2011 *************** *** 26,30 **** looks for to find the patch level (for the sccs version string). */ ! #define PATCHLEVEL 47 #endif /* _PATCHLEVEL_H_ */ --- 26,30 ---- looks for to find the patch level (for the sccs version string). */ ! #define PATCHLEVEL 48 #endif /* _PATCHLEVEL_H_ */