xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

parisc: Fix and enable seccomp filter support

Browse Source 
The seccomp filter support requires careful handling of task registers.  This
includes reloading of the return value (%r28) and proper syscall exit if
secure_computing() returned -1.

Additionally we need to sign-extend the syscall number from signed 32bit to
signed 64bit in do_syscall_trace_enter() since the ptrace interface only allows
storing 32bit values in compat mode.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v4.5
This commit is contained in:
Helge Deller
2016-03-30 14:14:31 +02:00
parent 4f4acc9472
commit 910cd32e55
4 changed files with 23 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
arch/parisc/include/asm/syscall.h
View File

@@ -39,6 +39,19 @@ static inline void syscall_get_arguments(struct task_struct *tsk,
}
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
regs->gr[28] = error ? error : val;
}
static inline void syscall_rollback(struct task_struct *task,
struct pt_regs *regs)
{
/* do nothing */
}
static inline int syscall_get_arch(void)
{
int arch = AUDIT_ARCH_PARISC;