From: Cristian Dumitrescu Date: Mon, 26 Oct 2020 19:59:16 +0000 (+0000) Subject: pipeline: fix string copy into fixed size buffer X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=0dde44843b684a5e4e5f7723739fda793bbf7541;p=dpdk.git pipeline: fix string copy into fixed size buffer Fix potential buffer overflows by string copy into fixed size buffer. Coverity issue: 362732, 362736, 362760, 362772, 362775, 362784 Coverity issue: 362800, 362803, 362806, 362811, 362814, 362816 Coverity issue: 362834, 362837, 362844, 362845, 362857, 362861 Coverity issue: 362868, 362890, 362893, 362904, 362905 Fixes: 56492fd536 ("pipeline: add new SWX pipeline type") Fixes: 1e4c88caea ("pipeline: add SWX extern objects and funcs") Fixes: e9d870dd93 ("pipeline: add SWX pipeline tables") Fixes: a1711f948d ("pipeline: add SWX Rx and extract instructions") Signed-off-by: Cristian Dumitrescu --- diff --git a/lib/librte_pipeline/rte_swx_pipeline.c b/lib/librte_pipeline/rte_swx_pipeline.c index 9d64611018..58480788b0 100644 --- a/lib/librte_pipeline/rte_swx_pipeline.c +++ b/lib/librte_pipeline/rte_swx_pipeline.c @@ -22,7 +22,17 @@ do { \ } while (0) #define CHECK_NAME(name, err_code) \ - CHECK((name) && (name)[0], err_code) + CHECK((name) && \ + (name)[0] && \ + (strnlen((name), RTE_SWX_NAME_SIZE) < RTE_SWX_NAME_SIZE), \ + err_code) + +#define CHECK_INSTRUCTION(instr, err_code) \ + CHECK((instr) && \ + (instr)[0] && \ + (strnlen((instr), RTE_SWX_INSTRUCTION_SIZE) < \ + RTE_SWX_INSTRUCTION_SIZE), \ + err_code) #ifndef TRACE_LEVEL #define TRACE_LEVEL 0 @@ -1635,12 +1645,12 @@ rte_swx_pipeline_extern_type_member_func_register(struct rte_swx_pipeline *p, CHECK(p, EINVAL); - CHECK(extern_type_name, EINVAL); + CHECK_NAME(extern_type_name, EINVAL); type = extern_type_find(p, extern_type_name); CHECK(type, EINVAL); CHECK(type->n_funcs < RTE_SWX_EXTERN_TYPE_MEMBER_FUNCS_MAX, ENOSPC); - CHECK(name, EINVAL); + CHECK_NAME(name, EINVAL); CHECK(!extern_type_member_func_find(type, name), EEXIST); CHECK(member_func, EINVAL); @@ -5280,8 +5290,6 @@ instr_return_exec(struct rte_swx_pipeline *p) t->ip = t->ret; } -#define RTE_SWX_INSTRUCTION_TOKENS_MAX 16 - static int instr_translate(struct rte_swx_pipeline *p, struct action *action, @@ -5301,6 +5309,7 @@ instr_translate(struct rte_swx_pipeline *p, break; CHECK(n_tokens < RTE_SWX_INSTRUCTION_TOKENS_MAX, EINVAL); + CHECK_NAME(token, EINVAL); tokens[n_tokens] = token; n_tokens++; @@ -5938,7 +5947,7 @@ instruction_config(struct rte_swx_pipeline *p, CHECK(n_instructions, EINVAL); CHECK(instructions, EINVAL); for (i = 0; i < n_instructions; i++) - CHECK(instructions[i], EINVAL); + CHECK_INSTRUCTION(instructions[i], EINVAL); /* Memory allocation. */ instr = calloc(n_instructions, sizeof(struct instruction)); @@ -6442,7 +6451,7 @@ rte_swx_pipeline_table_config(struct rte_swx_pipeline *p, struct action *a; uint32_t action_data_size; - CHECK(action_name, EINVAL); + CHECK_NAME(action_name, EINVAL); a = action_find(p, action_name); CHECK(a, EINVAL); @@ -6452,7 +6461,7 @@ rte_swx_pipeline_table_config(struct rte_swx_pipeline *p, action_data_size_max = action_data_size; } - CHECK(params->default_action_name, EINVAL); + CHECK_NAME(params->default_action_name, EINVAL); for (i = 0; i < p->n_actions; i++) if (!strcmp(params->action_names[i], params->default_action_name)) @@ -6463,6 +6472,9 @@ rte_swx_pipeline_table_config(struct rte_swx_pipeline *p, !params->default_action_data, EINVAL); /* Table type checks. */ + if (recommended_table_type_name) + CHECK_NAME(recommended_table_type_name, EINVAL); + if (params->n_fields) { enum rte_swx_table_match_type match_type; diff --git a/lib/librte_pipeline/rte_swx_pipeline.h b/lib/librte_pipeline/rte_swx_pipeline.h index aed627393d..f21a99556e 100644 --- a/lib/librte_pipeline/rte_swx_pipeline.h +++ b/lib/librte_pipeline/rte_swx_pipeline.h @@ -26,6 +26,17 @@ extern "C" { #ifndef RTE_SWX_NAME_SIZE #define RTE_SWX_NAME_SIZE 64 #endif + +/** Instruction size. */ +#ifndef RTE_SWX_INSTRUCTION_SIZE +#define RTE_SWX_INSTRUCTION_SIZE 256 +#endif + +/** Instruction tokens. */ +#ifndef RTE_SWX_INSTRUCTION_TOKENS_MAX +#define RTE_SWX_INSTRUCTION_TOKENS_MAX 16 +#endif + /* * Pipeline setup and operation */ diff --git a/lib/librte_pipeline/rte_swx_pipeline_spec.c b/lib/librte_pipeline/rte_swx_pipeline_spec.c index a4bc8226a0..f7884491b3 100644 --- a/lib/librte_pipeline/rte_swx_pipeline_spec.c +++ b/lib/librte_pipeline/rte_swx_pipeline_spec.c @@ -10,9 +10,8 @@ #include "rte_swx_pipeline.h" #include "rte_swx_ctl.h" -#define MAX_LINE_LENGTH 256 -#define MAX_TOKENS 16 -#define MAX_INSTRUCTION_LENGTH 256 +#define MAX_LINE_LENGTH RTE_SWX_INSTRUCTION_SIZE +#define MAX_TOKENS RTE_SWX_INSTRUCTION_TOKENS_MAX #define STRUCT_BLOCK 0 #define ACTION_BLOCK 1 @@ -442,7 +441,7 @@ action_block_parse(struct action_spec *s, uint32_t *err_line, const char **err_msg) { - char buffer[MAX_INSTRUCTION_LENGTH], *instr; + char buffer[RTE_SWX_INSTRUCTION_SIZE], *instr; const char **new_instructions; uint32_t i; @@ -1006,7 +1005,7 @@ apply_block_parse(struct apply_spec *s, uint32_t *err_line, const char **err_msg) { - char buffer[MAX_INSTRUCTION_LENGTH], *instr; + char buffer[RTE_SWX_INSTRUCTION_SIZE], *instr; const char **new_instructions; uint32_t i; @@ -1126,6 +1125,17 @@ rte_swx_pipeline_build_from_spec(struct rte_swx_pipeline *p, goto error; } + /* Handle excessively long tokens. */ + if (strnlen(token, RTE_SWX_NAME_SIZE) >= + RTE_SWX_NAME_SIZE) { + if (err_line) + *err_line = n_lines; + if (err_msg) + *err_msg = "Token too big."; + status = -EINVAL; + goto error; + } + /* Save token. */ tokens[n_tokens] = token; n_tokens++;