* Re: [linux-next:master 3857/7963] arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame [not found] <202108160330.T1EbbpCi-lkp@intel.com> @ 2021-09-20 11:02 ` Arnd Bergmann 2021-09-20 17:56 ` Josh Poimboeuf 0 siblings, 1 reply; 5+ messages in thread From: Arnd Bergmann @ 2021-09-20 11:02 UTC (permalink / raw) To: kernel test robot Cc: kbuild-all, clang-built-linux, Josh Poimboeuf, Peter Zijlstra, Linux Kernel Mailing List On Sun, Aug 15, 2021 at 9:41 PM kernel test robot <lkp@intel.com> wrote: > > CC: Linux Memory Management List <linux-mm@kvack.org> > TO: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> > CC: Herbert Xu <herbert@gondor.apana.org.au> > > Hi Tianjia, > > First bad commit (maybe != root cause): > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 4b358aabb93a2c654cd1dcab1a25a589f6e2b153 > commit: a7ee22ee1445c7fdb00ab80116bb9710ca86a860 [3857/7963] crypto: x86/sm4 - add AES-NI/AVX/x86_64 implementation > config: x86_64-randconfig-r024-20210816 (attached as .config) > compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7776b19eed44906e9973bfb240b6279d6feaab41) > reproduce (this is a W=1 build): > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a7ee22ee1445c7fdb00ab80116bb9710ca86a860 > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git fetch --no-tags linux-next master > git checkout a7ee22ee1445c7fdb00ab80116bb9710ca86a860 > # save the attached .config to linux build tree > mkdir build_dir > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/ > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com> > > All warnings (new ones prefixed by >>): > > >> arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame I see the same thing in my randconfig builds using gcc. This is an assembler file, my interpretation is that objtool has found an actual code bug: .macro FRAME_BEGIN push %_ASM_BP _ASM_MOV %_ASM_SP, %_ASM_BP .endm .macro FRAME_END pop %_ASM_BP .endm SYM_FUNC_START(sm4_aesni_avx_crypt8) /* input: * %rdi: round key array, CTX * %rsi: dst (1..8 blocks) * %rdx: src (1..8 blocks) * %rcx: num blocks (1..8) */ FRAME_BEGIN cmpq $5, %rcx; jb sm4_aesni_avx_crypt4; .... SYM_FUNC_START(sm4_aesni_avx_crypt4) /* input: * %rdi: round key array, CTX * %rsi: dst (1..4 blocks) * %rdx: src (1..4 blocks) * %rcx: num blocks (1..4) */ FRAME_BEGIN ... FRAME_END ret; SYM_FUNC_END(sm4_aesni_avx_crypt4) sm4_aesni_avx_crypt8() starts a frame and conditionally branches to sm4_aesni_avx_crypt4(), which starts another frame and returns from that without cleaning up the parent frame. Arnd ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [linux-next:master 3857/7963] arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame 2021-09-20 11:02 ` [linux-next:master 3857/7963] arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame Arnd Bergmann @ 2021-09-20 17:56 ` Josh Poimboeuf 2021-09-21 0:56 ` Herbert Xu ` (2 more replies) 0 siblings, 3 replies; 5+ messages in thread From: Josh Poimboeuf @ 2021-09-20 17:56 UTC (permalink / raw) To: Arnd Bergmann Cc: kernel test robot, kbuild-all, clang-built-linux, Peter Zijlstra, Linux Kernel Mailing List, Tianjia Zhang, Herbert Xu On Mon, Sep 20, 2021 at 01:02:07PM +0200, Arnd Bergmann wrote: > On Sun, Aug 15, 2021 at 9:41 PM kernel test robot <lkp@intel.com> wrote: > > > > CC: Linux Memory Management List <linux-mm@kvack.org> > > TO: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> > > CC: Herbert Xu <herbert@gondor.apana.org.au> > > > > Hi Tianjia, > > > > First bad commit (maybe != root cause): > > > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > > head: 4b358aabb93a2c654cd1dcab1a25a589f6e2b153 > > commit: a7ee22ee1445c7fdb00ab80116bb9710ca86a860 [3857/7963] crypto: x86/sm4 - add AES-NI/AVX/x86_64 implementation > > config: x86_64-randconfig-r024-20210816 (attached as .config) > > compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7776b19eed44906e9973bfb240b6279d6feaab41) > > reproduce (this is a W=1 build): > > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > > chmod +x ~/bin/make.cross > > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a7ee22ee1445c7fdb00ab80116bb9710ca86a860 > > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > > git fetch --no-tags linux-next master > > git checkout a7ee22ee1445c7fdb00ab80116bb9710ca86a860 > > # save the attached .config to linux build tree > > mkdir build_dir > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/ > > > > If you fix the issue, kindly add following tag as appropriate > > Reported-by: kernel test robot <lkp@intel.com> > > > > All warnings (new ones prefixed by >>): > > > > >> arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame > > I see the same thing in my randconfig builds using gcc. This is an > assembler file, > my interpretation is that objtool has found an actual code bug: > > .macro FRAME_BEGIN > push %_ASM_BP > _ASM_MOV %_ASM_SP, %_ASM_BP > .endm > .macro FRAME_END > pop %_ASM_BP > .endm > > SYM_FUNC_START(sm4_aesni_avx_crypt8) > /* input: > * %rdi: round key array, CTX > * %rsi: dst (1..8 blocks) > * %rdx: src (1..8 blocks) > * %rcx: num blocks (1..8) > */ > FRAME_BEGIN > > cmpq $5, %rcx; > jb sm4_aesni_avx_crypt4; > .... > > SYM_FUNC_START(sm4_aesni_avx_crypt4) > /* input: > * %rdi: round key array, CTX > * %rsi: dst (1..4 blocks) > * %rdx: src (1..4 blocks) > * %rcx: num blocks (1..4) > */ > FRAME_BEGIN > ... > FRAME_END > ret; > SYM_FUNC_END(sm4_aesni_avx_crypt4) > > > sm4_aesni_avx_crypt8() starts a frame and conditionally branches to > sm4_aesni_avx_crypt4(), which starts another frame and returns from > that without cleaning up the parent frame. Indeed! This looks completely broken with CONFIG_FRAME_POINTER. Needs something like: ---8<--- From: Josh Poimboeuf <jpoimboe@redhat.com> Subject: [PATCH] x86/crypto/sm4: Fix frame pointer stack corruption sm4_aesni_avx_crypt8() sets up the frame pointer (which includes pushing RBP) before doing a conditional sibling call to sm4_aesni_avx_crypt4(), which sets up an additional frame pointer. Things will not go well when sm4_aesni_avx_crypt4() pops only the innermost single frame pointer and then tries to return to the outermost frame pointer. Sibling calls need to occur with an empty stack frame. Do the conditional sibling call *before* setting up the stack pointer. This fixes the following warning: arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame Fixes: a7ee22ee1445 ("crypto: x86/sm4 - add AES-NI/AVX/x86_64 implementation") Reported-by: kernel test robot <lkp@intel.com> Reported-by: Arnd Bergmann <arnd@kernel.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> --- arch/x86/crypto/sm4-aesni-avx-asm_64.S | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/crypto/sm4-aesni-avx-asm_64.S b/arch/x86/crypto/sm4-aesni-avx-asm_64.S index fa2c3f50aecb..a50df13de222 100644 --- a/arch/x86/crypto/sm4-aesni-avx-asm_64.S +++ b/arch/x86/crypto/sm4-aesni-avx-asm_64.S @@ -367,10 +367,12 @@ SYM_FUNC_START(sm4_aesni_avx_crypt8) * %rdx: src (1..8 blocks) * %rcx: num blocks (1..8) */ - FRAME_BEGIN cmpq $5, %rcx; jb sm4_aesni_avx_crypt4; + + FRAME_BEGIN + vmovdqu (0 * 16)(%rdx), RA0; vmovdqu (1 * 16)(%rdx), RA1; vmovdqu (2 * 16)(%rdx), RA2; -- 2.31.1 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [linux-next:master 3857/7963] arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame 2021-09-20 17:56 ` Josh Poimboeuf @ 2021-09-21 0:56 ` Herbert Xu 2021-09-21 6:56 ` Peter Zijlstra 2021-09-22 2:28 ` Tianjia Zhang 2 siblings, 0 replies; 5+ messages in thread From: Herbert Xu @ 2021-09-21 0:56 UTC (permalink / raw) To: Josh Poimboeuf Cc: Arnd Bergmann, kernel test robot, kbuild-all, clang-built-linux, Peter Zijlstra, Linux Kernel Mailing List, Tianjia Zhang, Linux Crypto Mailing List On Mon, Sep 20, 2021 at 10:56:56AM -0700, Josh Poimboeuf wrote: > > Indeed! This looks completely broken with CONFIG_FRAME_POINTER. > > Needs something like: Please send a copy to linux-crypto. Thanks, -- Email: Herbert Xu <herbert@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [linux-next:master 3857/7963] arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame 2021-09-20 17:56 ` Josh Poimboeuf 2021-09-21 0:56 ` Herbert Xu @ 2021-09-21 6:56 ` Peter Zijlstra 2021-09-22 2:28 ` Tianjia Zhang 2 siblings, 0 replies; 5+ messages in thread From: Peter Zijlstra @ 2021-09-21 6:56 UTC (permalink / raw) To: Josh Poimboeuf Cc: Arnd Bergmann, kernel test robot, kbuild-all, clang-built-linux, Linux Kernel Mailing List, Tianjia Zhang, Herbert Xu On Mon, Sep 20, 2021 at 10:56:56AM -0700, Josh Poimboeuf wrote: > From: Josh Poimboeuf <jpoimboe@redhat.com> > Subject: [PATCH] x86/crypto/sm4: Fix frame pointer stack corruption > > sm4_aesni_avx_crypt8() sets up the frame pointer (which includes pushing > RBP) before doing a conditional sibling call to sm4_aesni_avx_crypt4(), > which sets up an additional frame pointer. Things will not go well when > sm4_aesni_avx_crypt4() pops only the innermost single frame pointer and > then tries to return to the outermost frame pointer. > > Sibling calls need to occur with an empty stack frame. Do the > conditional sibling call *before* setting up the stack pointer. > > This fixes the following warning: > > arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame > > Fixes: a7ee22ee1445 ("crypto: x86/sm4 - add AES-NI/AVX/x86_64 implementation") > Reported-by: kernel test robot <lkp@intel.com> > Reported-by: Arnd Bergmann <arnd@kernel.org> > Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> > --- > arch/x86/crypto/sm4-aesni-avx-asm_64.S | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/crypto/sm4-aesni-avx-asm_64.S b/arch/x86/crypto/sm4-aesni-avx-asm_64.S > index fa2c3f50aecb..a50df13de222 100644 > --- a/arch/x86/crypto/sm4-aesni-avx-asm_64.S > +++ b/arch/x86/crypto/sm4-aesni-avx-asm_64.S > @@ -367,10 +367,12 @@ SYM_FUNC_START(sm4_aesni_avx_crypt8) > * %rdx: src (1..8 blocks) > * %rcx: num blocks (1..8) > */ > - FRAME_BEGIN > > cmpq $5, %rcx; > jb sm4_aesni_avx_crypt4; > + > + FRAME_BEGIN > + > vmovdqu (0 * 16)(%rdx), RA0; > vmovdqu (1 * 16)(%rdx), RA1; > vmovdqu (2 * 16)(%rdx), RA2; > -- > 2.31.1 > ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [linux-next:master 3857/7963] arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame 2021-09-20 17:56 ` Josh Poimboeuf 2021-09-21 0:56 ` Herbert Xu 2021-09-21 6:56 ` Peter Zijlstra @ 2021-09-22 2:28 ` Tianjia Zhang 2 siblings, 0 replies; 5+ messages in thread From: Tianjia Zhang @ 2021-09-22 2:28 UTC (permalink / raw) To: Josh Poimboeuf, Arnd Bergmann Cc: kernel test robot, kbuild-all, clang-built-linux, Peter Zijlstra, Linux Kernel Mailing List, Herbert Xu On 9/21/21 1:56 AM, Josh Poimboeuf wrote: > From: Josh Poimboeuf <jpoimboe@redhat.com> > Subject: [PATCH] x86/crypto/sm4: Fix frame pointer stack corruption > > sm4_aesni_avx_crypt8() sets up the frame pointer (which includes pushing > RBP) before doing a conditional sibling call to sm4_aesni_avx_crypt4(), > which sets up an additional frame pointer. Things will not go well when > sm4_aesni_avx_crypt4() pops only the innermost single frame pointer and > then tries to return to the outermost frame pointer. > > Sibling calls need to occur with an empty stack frame. Do the > conditional sibling call *before* setting up the stack pointer. > > This fixes the following warning: > > arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame > > Fixes: a7ee22ee1445 ("crypto: x86/sm4 - add AES-NI/AVX/x86_64 implementation") > Reported-by: kernel test robot <lkp@intel.com> > Reported-by: Arnd Bergmann <arnd@kernel.org> > Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Thanks for your fix. Reviewed-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> Thanks. > --- > arch/x86/crypto/sm4-aesni-avx-asm_64.S | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/crypto/sm4-aesni-avx-asm_64.S b/arch/x86/crypto/sm4-aesni-avx-asm_64.S > index fa2c3f50aecb..a50df13de222 100644 > --- a/arch/x86/crypto/sm4-aesni-avx-asm_64.S > +++ b/arch/x86/crypto/sm4-aesni-avx-asm_64.S > @@ -367,10 +367,12 @@ SYM_FUNC_START(sm4_aesni_avx_crypt8) > * %rdx: src (1..8 blocks) > * %rcx: num blocks (1..8) > */ > - FRAME_BEGIN > > cmpq $5, %rcx; > jb sm4_aesni_avx_crypt4; > + > + FRAME_BEGIN > + > vmovdqu (0 * 16)(%rdx), RA0; > vmovdqu (1 * 16)(%rdx), RA1; > vmovdqu (2 * 16)(%rdx), RA2; > ^ permalink raw reply [flat|nested] 5+ messages in thread
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2021-09-20 11:02 ` [linux-next:master 3857/7963] arch/x86/crypto/sm4-aesni-avx-asm_64.o: warning: objtool: sm4_aesni_avx_crypt8()+0x8: sibling call from callable instruction with modified stack frame Arnd Bergmann
2021-09-20 17:56 ` Josh Poimboeuf
2021-09-21 0:56 ` Herbert Xu
2021-09-21 6:56 ` Peter Zijlstra
2021-09-22 2:28 ` Tianjia Zhang
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