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Add arm-specific code to set the system call number.

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Fixes rejection of commands due to policy on arm when in intercept mode.
This commit is contained in:
Todd C. Miller
2022-05-12 10:23:27 -06:00
parent 4a7d26c381
commit b99debf92f
2 changed files with 31 additions and 6 deletions
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12
src/exec_ptrace.c
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@@ -84,12 +84,12 @@ get_syscallno(struct sudo_ptrace_regs *regs)
}
static inline void
set_syscallno(struct sudo_ptrace_regs *regs, int syscallno)
set_syscallno(pid_t pid, struct sudo_ptrace_regs *regs, int syscallno)
{
if (regs->compat) {
compat_reg_syscall(regs->u.compat) = syscallno;
compat_reg_set_syscall(regs->u.compat, syscallno);
} else {
reg_syscall(regs->u.native) = syscallno;
reg_set_syscall(regs->u.native, syscallno);
}
}
@@ -194,9 +194,9 @@ get_syscallno(struct sudo_ptrace_regs *regs)
}
static inline void
set_syscallno(struct sudo_ptrace_regs *regs, int syscallno)
set_syscallno(pid_t pid, struct sudo_ptrace_regs *regs, int syscallno)
{
reg_syscall(regs->u.native) = syscallno;
reg_set_syscall(regs->u.native, syscallno);
}
static inline unsigned long
@@ -687,7 +687,7 @@ ptrace_fail_syscall(pid_t pid, struct sudo_ptrace_regs *regs, int ecode)
debug_decl(ptrace_fail_syscall, SUDO_DEBUG_EXEC);
/* Cause the syscall to fail by changing its number to -1. */
set_syscallno(regs, -1);
set_syscallno(pid, regs, -1);
if (!ptrace_setregs(pid, regs)) {
sudo_warn(U_("unable to set registers for process %d"), (int)pid);
debug_return_bool(false);