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lineage_android_kernel_samsung_jf
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Revert "Revert "CHROMIUM: arch/arm: move secure_computing into trace; respect return code"" 

This reverts commit a25e94221e.

Change-Id: Ic0f0e2a217656f5500058760cbde35277f50c09c
This commit is contained in:
Dan Pasanen 2015-08-26 09:18:42 -05:00
parent 487905d4b3
commit 4a740604d9
2 changed files with 12 additions and 8 deletions
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7
arch/arm/kernel/entry-common.S
View File

@ -452,12 +452,7 @@ ENTRY(vector_swi)
#ifdef CONFIG_SECCOMP
tst r10, #_TIF_SECCOMP
beq 1f
mov r0, scno
bl __secure_computing
add r0, sp, #S_R0 + S_OFF @ pointer to regs
ldmia r0, {r0 - r3} @ have to reload r0 - r3
1:
bne __sys_trace
#endif
tst r10, #_TIF_SYSCALL_WORK @ are we tracing syscalls?

13
arch/arm/kernel/ptrace.c
View File

@ -910,12 +910,16 @@ long arch_ptrace(struct task_struct *child, long request,
asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
{
unsigned long ip;
current_thread_info()->syscall = scno;
if (why)
audit_syscall_exit(regs);
else
else {
if (secure_computing(scno) == -1)
return -1;
audit_syscall_entry(AUDIT_ARCH_ARM, scno, regs->ARM_r0,
regs->ARM_r1, regs->ARM_r2, regs->ARM_r3);
}
if (why == 0 && test_and_clear_thread_flag(TIF_SYSCALL_RESTARTSYS))
scno = __NR_restart_syscall - __NR_SYSCALL_BASE;
@ -924,7 +928,12 @@ asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
if (!(current->ptrace & PT_PTRACED))
return scno;
current_thread_info()->syscall = scno;
/*
* IP is used to denote syscall entry/exit:
* IP = 0 -> entry, =1 -> exit
*/
ip = regs->ARM_ip;
regs->ARM_ip = why;
/*
* IP is used to denote syscall entry/exit: