From 83f7fb0d5bdbae3c50bac0eb1d4efe1c71692af8 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Wed, 2 Aug 2017 11:40:20 -0700 Subject: [PATCH] package/binutils: fix crash caused by buggy xtensa overlay In some xtensa configurations there may be system/user registers in xtensa-modules with negative index. ISA initialization for such config may clobber heap and result in program termination. Don't update lookup table entries for register with negative indices. Signed-off-by: Max Filippov Signed-off-by: Thomas Petazzoni --- ...-memory-corruption-by-broken-sysregs.patch | 42 +++++++++++++++++++ ...-memory-corruption-by-broken-sysregs.patch | 42 +++++++++++++++++++ ...-memory-corruption-by-broken-sysregs.patch | 42 +++++++++++++++++++ 3 files changed, 126 insertions(+) create mode 100644 package/binutils/2.27/0131-xtensa-fix-memory-corruption-by-broken-sysregs.patch create mode 100644 package/binutils/2.28.1/0131-xtensa-fix-memory-corruption-by-broken-sysregs.patch create mode 100644 package/binutils/2.29/0008-xtensa-fix-memory-corruption-by-broken-sysregs.patch diff --git a/package/binutils/2.27/0131-xtensa-fix-memory-corruption-by-broken-sysregs.patch b/package/binutils/2.27/0131-xtensa-fix-memory-corruption-by-broken-sysregs.patch new file mode 100644 index 0000000000..30103ee05e --- /dev/null +++ b/package/binutils/2.27/0131-xtensa-fix-memory-corruption-by-broken-sysregs.patch @@ -0,0 +1,42 @@ +From 3c8788dbb70b40e737d4b8e30cab81406e5c5091 Mon Sep 17 00:00:00 2001 +From: Max Filippov +Date: Wed, 2 Aug 2017 00:36:05 -0700 +Subject: [PATCH] xtensa: fix memory corruption by broken sysregs + +In some xtensa configurations there may be system/user registers in +xtensa-modules with negative index. ISA initialization for such config +may clobber heap and result in program termination. +Don't update lookup table entries for register with negative indices. +They are not directly accessible via RSR/WSR/XSR or RUR/WUR, so this +change should not affect processing of valid assembly/binary code. + +bfd/ +2017-08-02 Max Filippov + + * xtensa-isa.c (xtensa_isa_init): Don't update lookup table + entries for sysregs with negative indices. + +Signed-off-by: Max Filippov +--- +Backported from: d84ed528d4817b0ff854006b65a9f6ec75f0407a + + bfd/xtensa-isa.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/bfd/xtensa-isa.c b/bfd/xtensa-isa.c +index 8da75bea8109..8c6ee88fdeae 100644 +--- a/bfd/xtensa-isa.c ++++ b/bfd/xtensa-isa.c +@@ -292,7 +292,8 @@ xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p) + xtensa_sysreg_internal *sreg = &isa->sysregs[n]; + is_user = sreg->is_user; + +- isa->sysreg_table[is_user][sreg->number] = n; ++ if (sreg->number >= 0) ++ isa->sysreg_table[is_user][sreg->number] = n; + } + + /* Set up the interface lookup table. */ +-- +2.1.4 + diff --git a/package/binutils/2.28.1/0131-xtensa-fix-memory-corruption-by-broken-sysregs.patch b/package/binutils/2.28.1/0131-xtensa-fix-memory-corruption-by-broken-sysregs.patch new file mode 100644 index 0000000000..30103ee05e --- /dev/null +++ b/package/binutils/2.28.1/0131-xtensa-fix-memory-corruption-by-broken-sysregs.patch @@ -0,0 +1,42 @@ +From 3c8788dbb70b40e737d4b8e30cab81406e5c5091 Mon Sep 17 00:00:00 2001 +From: Max Filippov +Date: Wed, 2 Aug 2017 00:36:05 -0700 +Subject: [PATCH] xtensa: fix memory corruption by broken sysregs + +In some xtensa configurations there may be system/user registers in +xtensa-modules with negative index. ISA initialization for such config +may clobber heap and result in program termination. +Don't update lookup table entries for register with negative indices. +They are not directly accessible via RSR/WSR/XSR or RUR/WUR, so this +change should not affect processing of valid assembly/binary code. + +bfd/ +2017-08-02 Max Filippov + + * xtensa-isa.c (xtensa_isa_init): Don't update lookup table + entries for sysregs with negative indices. + +Signed-off-by: Max Filippov +--- +Backported from: d84ed528d4817b0ff854006b65a9f6ec75f0407a + + bfd/xtensa-isa.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/bfd/xtensa-isa.c b/bfd/xtensa-isa.c +index 8da75bea8109..8c6ee88fdeae 100644 +--- a/bfd/xtensa-isa.c ++++ b/bfd/xtensa-isa.c +@@ -292,7 +292,8 @@ xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p) + xtensa_sysreg_internal *sreg = &isa->sysregs[n]; + is_user = sreg->is_user; + +- isa->sysreg_table[is_user][sreg->number] = n; ++ if (sreg->number >= 0) ++ isa->sysreg_table[is_user][sreg->number] = n; + } + + /* Set up the interface lookup table. */ +-- +2.1.4 + diff --git a/package/binutils/2.29/0008-xtensa-fix-memory-corruption-by-broken-sysregs.patch b/package/binutils/2.29/0008-xtensa-fix-memory-corruption-by-broken-sysregs.patch new file mode 100644 index 0000000000..30103ee05e --- /dev/null +++ b/package/binutils/2.29/0008-xtensa-fix-memory-corruption-by-broken-sysregs.patch @@ -0,0 +1,42 @@ +From 3c8788dbb70b40e737d4b8e30cab81406e5c5091 Mon Sep 17 00:00:00 2001 +From: Max Filippov +Date: Wed, 2 Aug 2017 00:36:05 -0700 +Subject: [PATCH] xtensa: fix memory corruption by broken sysregs + +In some xtensa configurations there may be system/user registers in +xtensa-modules with negative index. ISA initialization for such config +may clobber heap and result in program termination. +Don't update lookup table entries for register with negative indices. +They are not directly accessible via RSR/WSR/XSR or RUR/WUR, so this +change should not affect processing of valid assembly/binary code. + +bfd/ +2017-08-02 Max Filippov + + * xtensa-isa.c (xtensa_isa_init): Don't update lookup table + entries for sysregs with negative indices. + +Signed-off-by: Max Filippov +--- +Backported from: d84ed528d4817b0ff854006b65a9f6ec75f0407a + + bfd/xtensa-isa.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/bfd/xtensa-isa.c b/bfd/xtensa-isa.c +index 8da75bea8109..8c6ee88fdeae 100644 +--- a/bfd/xtensa-isa.c ++++ b/bfd/xtensa-isa.c +@@ -292,7 +292,8 @@ xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p) + xtensa_sysreg_internal *sreg = &isa->sysregs[n]; + is_user = sreg->is_user; + +- isa->sysreg_table[is_user][sreg->number] = n; ++ if (sreg->number >= 0) ++ isa->sysreg_table[is_user][sreg->number] = n; + } + + /* Set up the interface lookup table. */ +-- +2.1.4 + -- 2.30.2