korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 12:28:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

s390: ensure that syscall arguments are properly masked on s390

Browse Source 
When executing s390 code on s390x the syscall arguments are not
properly masked, leading to some malformed audit records.

Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Paul Moore 2016-06-22 16:40:07 -04:00
parent 66b12abc84
commit da7f750c1e
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/s390/kernel/ptrace.c
View File

@ -822,6 +822,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
long ret = 0;
unsigned long mask = -1UL;
/* Do the secure computing check first. */
if (secure_computing()) {
@ -849,9 +850,12 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->gprs[2]);
audit_syscall_entry(regs->gprs[2], regs->orig_gpr2,
regs->gprs[3], regs->gprs[4],
regs->gprs[5]);
if (is_compat_task())
mask = 0xffffffff;
audit_syscall_entry(regs->gprs[2], regs->orig_gpr2 & mask,
regs->gprs[3] & mask, regs->gprs[4] & mask,
regs->gprs[5] & mask);
out:
return ret ?: regs->gprs[2];
}