backport upstream fix for CVEs and fix the regression that introduced [1] [1] http://lists.busybox.net/pipermail/busybox/2024-May/090766.html
Signed-off-by: Khem Raj <raj.k...@gmail.com> --- v2: Fix upstream status for patch #2 and typo in recipe ...01-awk-fix-precedence-of-relative-to.patch | 197 ++++++++++++++++++ ...x-ternary-operator-and-precedence-of.patch | 96 +++++++++ meta/recipes-core/busybox/busybox_1.36.1.bb | 2 + 3 files changed, 295 insertions(+) create mode 100644 meta/recipes-core/busybox/busybox/0001-awk-fix-precedence-of-relative-to.patch create mode 100644 meta/recipes-core/busybox/busybox/0002-awk-fix-ternary-operator-and-precedence-of.patch diff --git a/meta/recipes-core/busybox/busybox/0001-awk-fix-precedence-of-relative-to.patch b/meta/recipes-core/busybox/busybox/0001-awk-fix-precedence-of-relative-to.patch new file mode 100644 index 00000000000..5836cf8a003 --- /dev/null +++ b/meta/recipes-core/busybox/busybox/0001-awk-fix-precedence-of-relative-to.patch @@ -0,0 +1,197 @@ +From dedc9380c76834ba64c8b526aef6f461ea4e7f2e Mon Sep 17 00:00:00 2001 +From: Denys Vlasenko <vda.li...@googlemail.com> +Date: Tue, 30 May 2023 16:42:18 +0200 +Subject: [PATCH 1/2] awk: fix precedence of = relative to == + +Discovered while adding code to disallow assignments to non-lvalues + +function old new delta +parse_expr 936 991 +55 +.rodata 105243 105247 +4 +------------------------------------------------------------------------------ +(add/remove: 0/0 grow/shrink: 2/0 up/down: 59/0) Total: 59 bytes + +CVE: CVE-2023-42364 CVE-2023-42365 + +Upstream-Status: Backport [https://git.busybox.net/busybox/commit/?id=0256e00a9d077588bd3a39f5a1ef7e2eaa2911e4] +Signed-off-by: Denys Vlasenko <vda.li...@googlemail.com> +(cherry picked from commit 0256e00a9d077588bd3a39f5a1ef7e2eaa2911e4) +Signed-off-by: Khem Raj <raj.k...@gmail.com> +--- + editors/awk.c | 66 ++++++++++++++++++++++++++++++--------------- + testsuite/awk.tests | 5 ++++ + 2 files changed, 50 insertions(+), 21 deletions(-) + +diff --git a/editors/awk.c b/editors/awk.c +index ec9301e..aff86fe 100644 +--- a/editors/awk.c ++++ b/editors/awk.c +@@ -337,7 +337,9 @@ static void debug_parse_print_tc(uint32_t n) + #undef P + #undef PRIMASK + #undef PRIMASK2 +-#define P(x) (x << 24) ++/* Smaller 'x' means _higher_ operator precedence */ ++#define PRECEDENCE(x) (x << 24) ++#define P(x) PRECEDENCE(x) + #define PRIMASK 0x7F000000 + #define PRIMASK2 0x7E000000 + +@@ -360,7 +362,7 @@ enum { + OC_MOVE = 0x1f00, OC_PGETLINE = 0x2000, OC_REGEXP = 0x2100, + OC_REPLACE = 0x2200, OC_RETURN = 0x2300, OC_SPRINTF = 0x2400, + OC_TERNARY = 0x2500, OC_UNARY = 0x2600, OC_VAR = 0x2700, +- OC_DONE = 0x2800, ++ OC_CONST = 0x2800, OC_DONE = 0x2900, + + ST_IF = 0x3000, ST_DO = 0x3100, ST_FOR = 0x3200, + ST_WHILE = 0x3300 +@@ -440,9 +442,9 @@ static const uint32_t tokeninfo[] ALIGN4 = { + #define TI_PREINC (OC_UNARY|xV|P(9)|'P') + #define TI_PREDEC (OC_UNARY|xV|P(9)|'M') + TI_PREINC, TI_PREDEC, OC_FIELD|xV|P(5), +- OC_COMPARE|VV|P(39)|5, OC_MOVE|VV|P(74), OC_REPLACE|NV|P(74)|'+', OC_REPLACE|NV|P(74)|'-', +- OC_REPLACE|NV|P(74)|'*', OC_REPLACE|NV|P(74)|'/', OC_REPLACE|NV|P(74)|'%', OC_REPLACE|NV|P(74)|'&', +- OC_BINARY|NV|P(29)|'+', OC_BINARY|NV|P(29)|'-', OC_REPLACE|NV|P(74)|'&', OC_BINARY|NV|P(15)|'&', ++ OC_COMPARE|VV|P(39)|5, OC_MOVE|VV|P(38), OC_REPLACE|NV|P(38)|'+', OC_REPLACE|NV|P(38)|'-', ++ OC_REPLACE|NV|P(38)|'*', OC_REPLACE|NV|P(38)|'/', OC_REPLACE|NV|P(38)|'%', OC_REPLACE|NV|P(38)|'&', ++ OC_BINARY|NV|P(29)|'+', OC_BINARY|NV|P(29)|'-', OC_REPLACE|NV|P(38)|'&', OC_BINARY|NV|P(15)|'&', + OC_BINARY|NV|P(25)|'/', OC_BINARY|NV|P(25)|'%', OC_BINARY|NV|P(15)|'&', OC_BINARY|NV|P(25)|'*', + OC_COMPARE|VV|P(39)|4, OC_COMPARE|VV|P(39)|3, OC_COMPARE|VV|P(39)|0, OC_COMPARE|VV|P(39)|1, + #define TI_LESS (OC_COMPARE|VV|P(39)|2) +@@ -1290,7 +1292,7 @@ static uint32_t next_token(uint32_t expected) + save_tclass = tc; + save_info = t_info; + tc = TC_BINOPX; +- t_info = OC_CONCAT | SS | P(35); ++ t_info = OC_CONCAT | SS | PRECEDENCE(35); + } + + t_tclass = tc; +@@ -1350,9 +1352,8 @@ static node *parse_expr(uint32_t term_tc) + { + node sn; + node *cn = &sn; +- node *vn, *glptr; ++ node *glptr; + uint32_t tc, expected_tc; +- var *v; + + debug_printf_parse("%s() term_tc(%x):", __func__, term_tc); + debug_parse_print_tc(term_tc); +@@ -1363,11 +1364,12 @@ static node *parse_expr(uint32_t term_tc) + expected_tc = TS_OPERAND | TS_UOPPRE | TC_REGEXP | term_tc; + + while (!((tc = next_token(expected_tc)) & term_tc)) { ++ node *vn; + + if (glptr && (t_info == TI_LESS)) { + /* input redirection (<) attached to glptr node */ + debug_printf_parse("%s: input redir\n", __func__); +- cn = glptr->l.n = new_node(OC_CONCAT | SS | P(37)); ++ cn = glptr->l.n = new_node(OC_CONCAT | SS | PRECEDENCE(37)); + cn->a.n = glptr; + expected_tc = TS_OPERAND | TS_UOPPRE; + glptr = NULL; +@@ -1379,24 +1381,42 @@ static node *parse_expr(uint32_t term_tc) + * previous operators with higher priority */ + vn = cn; + while (((t_info & PRIMASK) > (vn->a.n->info & PRIMASK2)) +- || ((t_info == vn->info) && t_info == TI_COLON) ++ || (t_info == vn->info && t_info == TI_COLON) + ) { + vn = vn->a.n; + if (!vn->a.n) syntax_error(EMSG_UNEXP_TOKEN); + } + if (t_info == TI_TERNARY) + //TODO: why? +- t_info += P(6); ++ t_info += PRECEDENCE(6); + cn = vn->a.n->r.n = new_node(t_info); + cn->a.n = vn->a.n; + if (tc & TS_BINOP) { + cn->l.n = vn; +-//FIXME: this is the place to detect and reject assignments to non-lvalues. +-//Currently we allow "assignments" to consts and temporaries, nonsense like this: +-// awk 'BEGIN { "qwe" = 1 }' +-// awk 'BEGIN { 7 *= 7 }' +-// awk 'BEGIN { length("qwe") = 1 }' +-// awk 'BEGIN { (1+1) += 3 }' ++ ++ /* Prevent: ++ * awk 'BEGIN { "qwe" = 1 }' ++ * awk 'BEGIN { 7 *= 7 }' ++ * awk 'BEGIN { length("qwe") = 1 }' ++ * awk 'BEGIN { (1+1) += 3 }' ++ */ ++ /* Assignment? (including *= and friends) */ ++ if (((t_info & OPCLSMASK) == OC_MOVE) ++ || ((t_info & OPCLSMASK) == OC_REPLACE) ++ ) { ++ debug_printf_parse("%s: MOVE/REPLACE vn->info:%08x\n", __func__, vn->info); ++ /* Left side is a (variable or array element) ++ * or function argument ++ * or $FIELD ? ++ */ ++ if ((vn->info & OPCLSMASK) != OC_VAR ++ && (vn->info & OPCLSMASK) != OC_FNARG ++ && (vn->info & OPCLSMASK) != OC_FIELD ++ ) { ++ syntax_error(EMSG_UNEXP_TOKEN); /* no. bad */ ++ } ++ } ++ + expected_tc = TS_OPERAND | TS_UOPPRE | TC_REGEXP; + if (t_info == TI_PGETLINE) { + /* it's a pipe */ +@@ -1432,6 +1452,8 @@ static node *parse_expr(uint32_t term_tc) + /* one should be very careful with switch on tclass - + * only simple tclasses should be used (TC_xyz, not TS_xyz) */ + switch (tc) { ++ var *v; ++ + case TC_VARIABLE: + case TC_ARRAY: + debug_printf_parse("%s: TC_VARIABLE | TC_ARRAY\n", __func__); +@@ -1452,14 +1474,14 @@ static node *parse_expr(uint32_t term_tc) + case TC_NUMBER: + case TC_STRING: + debug_printf_parse("%s: TC_NUMBER | TC_STRING\n", __func__); +- cn->info = OC_VAR; ++ cn->info = OC_CONST; + v = cn->l.v = xzalloc(sizeof(var)); +- if (tc & TC_NUMBER) ++ if (tc & TC_NUMBER) { + setvar_i(v, t_double); +- else { ++ } else { + setvar_s(v, t_string); +- expected_tc &= ~TC_UOPPOST; /* "str"++ is not allowed */ + } ++ expected_tc &= ~TC_UOPPOST; /* NUM++, "str"++ not allowed */ + break; + + case TC_REGEXP: +@@ -3107,6 +3129,8 @@ static var *evaluate(node *op, var *res) + + /* -- recursive node type -- */ + ++ case XC( OC_CONST ): ++ debug_printf_eval("CONST "); + case XC( OC_VAR ): + debug_printf_eval("VAR\n"); + L.v = op->l.v; +diff --git a/testsuite/awk.tests b/testsuite/awk.tests +index ddc5104..a78fdcd 100755 +--- a/testsuite/awk.tests ++++ b/testsuite/awk.tests +@@ -540,4 +540,9 @@ testing 'awk assign while assign' \ + │ trim/eff : 57.02%/26, 0.00% │ [cpu000:100%] + └────────────────────────────────────────────────────┘^C" + ++testing "awk = has higher precedence than == (despite what gawk manpage claims)" \ ++ "awk 'BEGIN { v=1; print 2==v; print 2==v=2; print v; print v=3==3; print v}'" \ ++ '0\n1\n2\n1\n3\n' \ ++ '' '' ++ + exit $FAILCOUNT diff --git a/meta/recipes-core/busybox/busybox/0002-awk-fix-ternary-operator-and-precedence-of.patch b/meta/recipes-core/busybox/busybox/0002-awk-fix-ternary-operator-and-precedence-of.patch new file mode 100644 index 00000000000..ea3c84897b9 --- /dev/null +++ b/meta/recipes-core/busybox/busybox/0002-awk-fix-ternary-operator-and-precedence-of.patch @@ -0,0 +1,96 @@ +From c3bfdac8e0e9a21d524ad72036953f68d2193e52 Mon Sep 17 00:00:00 2001 +From: Natanael Copa <nc...@alpinelinux.org> +Date: Tue, 21 May 2024 14:46:08 +0200 +Subject: [PATCH 2/2] awk: fix ternary operator and precedence of = + +Adjust the = precedence test to match behavior of gawk, mawk and +FreeBSD. awk 'BEGIN {print v=3==3; print v}' should print two '1'. + +To fix this, and to unbreak the ternary conditional operator, we restore +the precedence of = in the token list, but override this with a lower +priority when the assignment is on the right side of a compare. + +This fixes commit 0256e00a9d07 (awk: fix precedence of = relative to ==) [1] + +CVE: CVE-2023-42364 CVE-2023-42365 + +Upstream-Status: Submitted [http://lists.busybox.net/pipermail/busybox/2024-May/090766.html] + +[1] https://bugs.busybox.net/show_bug.cgi?id=15871#c6 + +Signed-off-by: Natanael Copa <nc...@alpinelinux.org> +(cherry picked from commit 1714301c405ef03b39605c85c23f22a190cddd95) +Signed-off-by: Khem Raj <raj.k...@gmail.com> +--- + editors/awk.c | 18 ++++++++++++++---- + testsuite/awk.tests | 9 +++++++-- + 2 files changed, 21 insertions(+), 6 deletions(-) + +diff --git a/editors/awk.c b/editors/awk.c +index aff86fe..f320d8c 100644 +--- a/editors/awk.c ++++ b/editors/awk.c +@@ -442,9 +442,10 @@ static const uint32_t tokeninfo[] ALIGN4 = { + #define TI_PREINC (OC_UNARY|xV|P(9)|'P') + #define TI_PREDEC (OC_UNARY|xV|P(9)|'M') + TI_PREINC, TI_PREDEC, OC_FIELD|xV|P(5), +- OC_COMPARE|VV|P(39)|5, OC_MOVE|VV|P(38), OC_REPLACE|NV|P(38)|'+', OC_REPLACE|NV|P(38)|'-', +- OC_REPLACE|NV|P(38)|'*', OC_REPLACE|NV|P(38)|'/', OC_REPLACE|NV|P(38)|'%', OC_REPLACE|NV|P(38)|'&', +- OC_BINARY|NV|P(29)|'+', OC_BINARY|NV|P(29)|'-', OC_REPLACE|NV|P(38)|'&', OC_BINARY|NV|P(15)|'&', ++#define TI_ASSIGN (OC_MOVE|VV|P(74)) ++ OC_COMPARE|VV|P(39)|5, TI_ASSIGN, OC_REPLACE|NV|P(74)|'+', OC_REPLACE|NV|P(74)|'-', ++ OC_REPLACE|NV|P(74)|'*', OC_REPLACE|NV|P(74)|'/', OC_REPLACE|NV|P(74)|'%', OC_REPLACE|NV|P(74)|'&', ++ OC_BINARY|NV|P(29)|'+', OC_BINARY|NV|P(29)|'-', OC_REPLACE|NV|P(74)|'&', OC_BINARY|NV|P(15)|'&', + OC_BINARY|NV|P(25)|'/', OC_BINARY|NV|P(25)|'%', OC_BINARY|NV|P(15)|'&', OC_BINARY|NV|P(25)|'*', + OC_COMPARE|VV|P(39)|4, OC_COMPARE|VV|P(39)|3, OC_COMPARE|VV|P(39)|0, OC_COMPARE|VV|P(39)|1, + #define TI_LESS (OC_COMPARE|VV|P(39)|2) +@@ -1376,11 +1377,19 @@ static node *parse_expr(uint32_t term_tc) + continue; + } + if (tc & (TS_BINOP | TC_UOPPOST)) { ++ int prio; + debug_printf_parse("%s: TS_BINOP | TC_UOPPOST tc:%x\n", __func__, tc); + /* for binary and postfix-unary operators, jump back over + * previous operators with higher priority */ + vn = cn; +- while (((t_info & PRIMASK) > (vn->a.n->info & PRIMASK2)) ++ /* Let assignment get higher priority when used on right ++ * side in compare. i.e: 2==v=3 */ ++ if (t_info == TI_ASSIGN && (vn->a.n->info & OPCLSMASK) == OC_COMPARE) { ++ prio = PRECEDENCE(38); ++ } else { ++ prio = (t_info & PRIMASK); ++ } ++ while ((prio > (vn->a.n->info & PRIMASK2)) + || (t_info == vn->info && t_info == TI_COLON) + ) { + vn = vn->a.n; +@@ -1412,6 +1421,7 @@ static node *parse_expr(uint32_t term_tc) + if ((vn->info & OPCLSMASK) != OC_VAR + && (vn->info & OPCLSMASK) != OC_FNARG + && (vn->info & OPCLSMASK) != OC_FIELD ++ && (vn->info & OPCLSMASK) != OC_COMPARE + ) { + syntax_error(EMSG_UNEXP_TOKEN); /* no. bad */ + } +diff --git a/testsuite/awk.tests b/testsuite/awk.tests +index a78fdcd..d2706de 100755 +--- a/testsuite/awk.tests ++++ b/testsuite/awk.tests +@@ -540,9 +540,14 @@ testing 'awk assign while assign' \ + │ trim/eff : 57.02%/26, 0.00% │ [cpu000:100%] + └────────────────────────────────────────────────────┘^C" + +-testing "awk = has higher precedence than == (despite what gawk manpage claims)" \ ++testing "awk = has higher precedence than == on right side" \ + "awk 'BEGIN { v=1; print 2==v; print 2==v=2; print v; print v=3==3; print v}'" \ +- '0\n1\n2\n1\n3\n' \ ++ '0\n1\n2\n1\n1\n' \ ++ '' '' ++ ++testing 'awk ternary precedence' \ ++ "awk 'BEGIN { a = 0 ? \"yes\": \"no\"; print a }'" \ ++ 'no\n' \ + '' '' + + exit $FAILCOUNT diff --git a/meta/recipes-core/busybox/busybox_1.36.1.bb b/meta/recipes-core/busybox/busybox_1.36.1.bb index 67bc5c0cadd..6972eef81ff 100644 --- a/meta/recipes-core/busybox/busybox_1.36.1.bb +++ b/meta/recipes-core/busybox/busybox_1.36.1.bb @@ -53,6 +53,8 @@ SRC_URI = "https://busybox.net/downloads/busybox-${PV}.tar.bz2;name=tarball \ file://0001-awk-fix-segfault-when-compiled-by-clang.patch \ file://CVE-2023-42363.patch \ file://busybox-1.36.1-no-cbq.patch \ + file://0001-awk-fix-precedence-of-relative-to.patch \ + file://0002-awk-fix-ternary-operator-and-precedence-of.patch \ " SRC_URI:append:libc-musl = " file://musl.cfg " # TODO http://lists.busybox.net/pipermail/busybox/2023-January/090078.html
-=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#201894): https://lists.openembedded.org/g/openembedded-core/message/201894 Mute This Topic: https://lists.openembedded.org/mt/107218690/21656 Group Owner: openembedded-core+ow...@lists.openembedded.org Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
