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ARM: 7525/1: ptrace: use updated syscall number for syscall auditing

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When tracing system calls, a debugger may change the syscall number
in response to a SIGTRAP on syscall entry.

This patch ensures that the new syscall number is passed to the audit
code.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Will Deacon 2012-09-07 18:20:30 +01:00 • committed by Russell King
parent 1f66e06fb6
commit ebb5e15c3e
1 changed files with 6 additions and 6 deletions
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12
arch/arm/kernel/ptrace.c
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@ -944,19 +944,19 @@ static int ptrace_syscall_trace(struct pt_regs *regs, int scno,
asmlinkage int syscall_trace_enter(struct pt_regs *regs, int scno) asmlinkage int syscall_trace_enter(struct pt_regs *regs, int scno)
{ {
int ret = ptrace_syscall_trace(regs, scno, PTRACE_SYSCALL_ENTER); scno = ptrace_syscall_trace(regs, scno, PTRACE_SYSCALL_ENTER);
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_enter(regs, ret); trace_sys_enter(regs, scno);
audit_syscall_entry(AUDIT_ARCH_ARM, scno, regs->ARM_r0, regs->ARM_r1, audit_syscall_entry(AUDIT_ARCH_ARM, scno, regs->ARM_r0, regs->ARM_r1,
regs->ARM_r2, regs->ARM_r3); regs->ARM_r2, regs->ARM_r3);
return ret; return scno;
} }
asmlinkage int syscall_trace_exit(struct pt_regs *regs, int scno) asmlinkage int syscall_trace_exit(struct pt_regs *regs, int scno)
{ {
int ret = ptrace_syscall_trace(regs, scno, PTRACE_SYSCALL_EXIT); scno = ptrace_syscall_trace(regs, scno, PTRACE_SYSCALL_EXIT);
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_exit(regs, ret); trace_sys_exit(regs, scno);
audit_syscall_exit(regs); audit_syscall_exit(regs);
return ret; return scno;
} }