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Red Hat Bugzilla – Attachment 237851 Details for
Bug 353031
CVE 2007-4573 fix
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cve2007-4573.patch
cve2007-4573.patch (text/plain), 2.28 KB, created by
IBM Bug Proxy
on 2007-10-25 19:10:52 UTC
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Description:
cve2007-4573.patch
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MIME Type:
Creator:
IBM Bug Proxy
Created:
2007-10-25 19:10:52 UTC
Size:
2.28 KB
patch
obsolete
>diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S >index 9382786..18b2318 100644 >--- a/arch/x86_64/ia32/ia32entry.S >+++ b/arch/x86_64/ia32/ia32entry.S >@@ -38,6 +38,18 @@ > movq %rax,R8(%rsp) > .endm > >+ .macro LOAD_ARGS32 offset >+ movl \offset(%rsp),%r11d >+ movl \offset+8(%rsp),%r10d >+ movl \offset+16(%rsp),%r9d >+ movl \offset+24(%rsp),%r8d >+ movl \offset+40(%rsp),%ecx >+ movl \offset+48(%rsp),%edx >+ movl \offset+56(%rsp),%esi >+ movl \offset+64(%rsp),%edi >+ movl \offset+72(%rsp),%eax >+ .endm >+ > .macro CFI_STARTPROC32 simple > CFI_STARTPROC \simple > CFI_UNDEFINED r8 >@@ -152,7 +164,7 @@ sysenter_tracesys: > movq $-ENOSYS,RAX(%rsp) /* really needed? */ > movq %rsp,%rdi /* &pt_regs -> arg1 */ > call syscall_trace_enter >- LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */ >+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ > RESTORE_REST > movl %ebp, %ebp > /* no need to do an access_ok check here because rbp has been >@@ -255,7 +267,7 @@ cstar_tracesys: > movq $-ENOSYS,RAX(%rsp) /* really needed? */ > movq %rsp,%rdi /* &pt_regs -> arg1 */ > call syscall_trace_enter >- LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */ >+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ > RESTORE_REST > movl RSP-ARGOFFSET(%rsp), %r8d > /* no need to do an access_ok check here because r8 has been >@@ -334,7 +346,7 @@ ia32_tracesys: > movq $-ENOSYS,RAX(%rsp) /* really needed? */ > movq %rsp,%rdi /* &pt_regs -> arg1 */ > call syscall_trace_enter >- LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */ >+ LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ > RESTORE_REST > jmp ia32_do_syscall > END(ia32_syscall) >diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c >index e83cc67..eea3702 100644 >--- a/arch/x86_64/kernel/ptrace.c >+++ b/arch/x86_64/kernel/ptrace.c >@@ -232,10 +232,6 @@ static int putreg(struct task_struct *child, > { > unsigned long tmp; > >- /* Some code in the 64bit emulation may not be 64bit clean. >- Don't take any chances. */ >- if (test_tsk_thread_flag(child, TIF_IA32)) >- value &= 0xffffffff; > switch (regno) { > case offsetof(struct user_regs_struct,fs): > if (value && (value & 3) != 3)
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bug 353031
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