提交 9d37c405 编写于 作者: M Markos Chandras 提交者: Ralf Baechle

MIPS: kernel: scalls: Skip the syscall if denied by the seccomp filter

Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
Reviewed-by: NPaul Burton <paul.burton@imgtec.com>
Reviewed-by: NJames Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6399/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
上级 1225eb82
......@@ -120,6 +120,8 @@ syscall_trace_entry:
move a0, sp
jal syscall_trace_enter
bltz v0, 2f # seccomp failed? Skip syscall
move t0, s0
RESTORE_STATIC
lw a0, PT_R4(sp) # Restore argument registers
......@@ -138,7 +140,7 @@ syscall_trace_entry:
sw t1, PT_R0(sp) # save it for syscall restarting
1: sw v0, PT_R2(sp) # result
j syscall_exit
2: j syscall_exit
/* ------------------------------------------------------------------------ */
......
......@@ -82,6 +82,8 @@ syscall_trace_entry:
move a0, sp
jal syscall_trace_enter
bltz v0, 2f # seccomp failed? Skip syscall
move t0, s0
RESTORE_STATIC
ld a0, PT_R4(sp) # Restore argument registers
......@@ -102,7 +104,7 @@ syscall_trace_entry:
sd t1, PT_R0(sp) # save it for syscall restarting
1: sd v0, PT_R2(sp) # result
j syscall_exit
2: j syscall_exit
illegal_syscall:
/* This also isn't a 64-bit syscall, throw an error. */
......
......@@ -74,6 +74,8 @@ n32_syscall_trace_entry:
move a0, sp
jal syscall_trace_enter
bltz v0, 2f # seccomp failed? Skip syscall
move t0, s0
RESTORE_STATIC
ld a0, PT_R4(sp) # Restore argument registers
......@@ -94,7 +96,7 @@ n32_syscall_trace_entry:
sd t1, PT_R0(sp) # save it for syscall restarting
1: sd v0, PT_R2(sp) # result
j syscall_exit
2: j syscall_exit
not_n32_scall:
/* This is not an n32 compatibility syscall, pass it on to
......
......@@ -114,6 +114,8 @@ trace_a_syscall:
move a0, sp
jal syscall_trace_enter
bltz v0, 2f # seccomp failed? Skip syscall
move t0, s0
RESTORE_STATIC
ld a0, PT_R4(sp) # Restore argument registers
......@@ -136,7 +138,7 @@ trace_a_syscall:
sd t1, PT_R0(sp) # save it for syscall restarting
1: sd v0, PT_R2(sp) # result
j syscall_exit
2: j syscall_exit
/* ------------------------------------------------------------------------ */
......
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