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[PATCH v2 46/55] linux-user: Disable more prctl subcodes
From: |
Richard Henderson |
Subject: |
[PATCH v2 46/55] linux-user: Disable more prctl subcodes |
Date: |
Mon, 2 Aug 2021 18:14:34 -1000 |
Create a list of subcodes that we want to pass on, a list of
subcodes that should not be passed on because they would affect
the running qemu itself, and a list that probably could be
implemented but require extra work. Do not pass on unknown subcodes.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/syscall.c | 56 ++++++++++++++++++++++++++++++++++++++++----
1 file changed, 52 insertions(+), 4 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 6e630745fa..e303a9da7f 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6325,6 +6325,13 @@ abi_long do_arch_prctl(CPUX86State *env, int code,
abi_ulong addr)
# define PR_MTE_TAG_SHIFT 3
# define PR_MTE_TAG_MASK (0xffffUL << PR_MTE_TAG_SHIFT)
#endif
+#ifndef PR_SET_IO_FLUSHER
+# define PR_SET_IO_FLUSHER 57
+# define PR_GET_IO_FLUSHER 58
+#endif
+#ifndef PR_SET_SYSCALL_USER_DISPATCH
+# define PR_SET_SYSCALL_USER_DISPATCH 59
+#endif
static abi_long do_prctl_get_fp_mode(CPUArchState *env)
{
@@ -6632,13 +6639,54 @@ static abi_long do_prctl(CPUArchState *env, abi_long
option, abi_long arg2,
return -TARGET_EINVAL;
}
return do_prctl_get_tagged_addr_ctrl(env);
+
+ case PR_GET_DUMPABLE:
+ case PR_SET_DUMPABLE:
+ case PR_GET_KEEPCAPS:
+ case PR_SET_KEEPCAPS:
+ case PR_GET_TIMING:
+ case PR_SET_TIMING:
+ case PR_GET_TIMERSLACK:
+ case PR_SET_TIMERSLACK:
+ case PR_MCE_KILL:
+ case PR_MCE_KILL_GET:
+ case PR_GET_NO_NEW_PRIVS:
+ case PR_SET_NO_NEW_PRIVS:
+ case PR_GET_IO_FLUSHER:
+ case PR_SET_IO_FLUSHER:
+ /* Some prctl options have no pointer arguments and we can pass on. */
+ return get_errno(prctl(option, arg2, arg3, arg4, arg5));
+
+ case PR_GET_CHILD_SUBREAPER:
+ case PR_SET_CHILD_SUBREAPER:
+ case PR_GET_SPECULATION_CTRL:
+ case PR_SET_SPECULATION_CTRL:
+ case PR_GET_TID_ADDRESS:
+ /* TODO */
+ return -TARGET_EINVAL;
+
+ case PR_GET_FPEXC:
+ case PR_SET_FPEXC:
+ /* Was used for SPE on PowerPC. */
+ return -TARGET_EINVAL;
+
+ case PR_GET_ENDIAN:
+ case PR_SET_ENDIAN:
+ case PR_GET_FPEMU:
+ case PR_SET_FPEMU:
+ case PR_SET_MM:
case PR_GET_SECCOMP:
case PR_SET_SECCOMP:
- /* Disable seccomp to prevent the target disabling syscalls we need. */
- return -TARGET_EINVAL;
+ case PR_SET_SYSCALL_USER_DISPATCH:
+ case PR_GET_THP_DISABLE:
+ case PR_SET_THP_DISABLE:
+ case PR_GET_TSC:
+ case PR_SET_TSC:
+ case PR_GET_UNALIGN:
+ case PR_SET_UNALIGN:
default:
- /* Most prctl options have no pointer arguments */
- return get_errno(prctl(option, arg2, arg3, arg4, arg5));
+ /* Disable to prevent the target disabling stuff we need. */
+ return -TARGET_EINVAL;
}
}
--
2.25.1
- Re: [PATCH v2 37/55] target/mips: Use 8-byte memory ops for msa load/store, (continued)
- [PATCH v2 38/55] target/s390x: Use cpu_*_mmu instead of helper_*_mmu, Richard Henderson, 2021/08/03
- [PATCH v2 32/55] target/s390x: Use MO_128 for 16 byte atomics, Richard Henderson, 2021/08/03
- [PATCH v2 36/55] target/mips: Use cpu_*_data_ra for msa load/store, Richard Henderson, 2021/08/03
- [PATCH v2 40/55] target/arm: Use cpu_*_mmu instead of helper_*_mmu, Richard Henderson, 2021/08/03
- [PATCH v2 41/55] tcg: Move helper_*_mmu decls to tcg/tcg-ldst.h, Richard Henderson, 2021/08/03
- [PATCH v2 42/55] tcg: Add helper_unaligned_mmu for user-only sigbus, Richard Henderson, 2021/08/03
- [PATCH v2 43/55] tcg/i386: Support raising sigbus for user-only, Richard Henderson, 2021/08/03
- [PATCH v2 44/55] tests/tcg/multiarch: Add sigbus.c, Richard Henderson, 2021/08/03
- [PATCH v2 46/55] linux-user: Disable more prctl subcodes,
Richard Henderson <=
- [PATCH v2 47/55] hw/core/cpu: Re-sort the non-pointers to the end of CPUClass, Richard Henderson, 2021/08/03
- [PATCH v2 45/55] linux-user: Split out do_prctl and subroutines, Richard Henderson, 2021/08/03
- [PATCH v2 48/55] linux-user: Add code for PR_GET/SET_UNALIGN, Richard Henderson, 2021/08/03
- [PATCH v2 49/55] hw/core/cpu: Move cpu properties to cpu-sysemu.c, Richard Henderson, 2021/08/03
- [PATCH v2 50/55] hw/core/cpu: Add prctl-unalign-sigbus property for user-only, Richard Henderson, 2021/08/03
- [PATCH v2 51/55] target/alpha: Reorg fp memory operations, Richard Henderson, 2021/08/03
- [PATCH v2 52/55] target/alpha: Reorg integer memory operations, Richard Henderson, 2021/08/03
- [PATCH v2 53/55] target/alpha: Implement prctl_unalign_sigbus, Richard Henderson, 2021/08/03
- [PATCH v2 54/55] target/hppa: Implement prctl_unalign_sigbus, Richard Henderson, 2021/08/03
- [PATCH v2 55/55] target/sh4: Implement prctl_unalign_sigbus, Richard Henderson, 2021/08/03