Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"The fixes are still trickling in for arm64, but the only really
significant one here is actually fixing a regression in the botched
module relocation range checking merged for -rc2.
Hopefully we've nailed it this time.
- Fix implementation of our set_personality() system call, which
wasn't being wrapped properly
- Fix system call function types to keep CFI happy
- Fix siginfo layout when delivering SIGKILL after a kernel fault
- Really fix module relocation range checking"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: use the correct function type for __arm64_sys_ni_syscall
arm64: use the correct function type in SYSCALL_DEFINE0
arm64: fix syscall_fn_t type
signal/arm64: Use force_sig not force_sig_fault for SIGKILL
arm64/module: revert to unsigned interpretation of ABS16/32 relocations
arm64: Fix the arm64_personality() syscall wrapper redirection
diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h
index a65167f..e8bcb9e 100644
--- a/arch/arm64/include/asm/syscall.h
+++ b/arch/arm64/include/asm/syscall.h
@@ -20,7 +20,7 @@
#include <linux/compat.h>
#include <linux/err.h>
-typedef long (*syscall_fn_t)(struct pt_regs *regs);
+typedef long (*syscall_fn_t)(const struct pt_regs *regs);
extern const syscall_fn_t sys_call_table[];
diff --git a/arch/arm64/include/asm/syscall_wrapper.h b/arch/arm64/include/asm/syscall_wrapper.h
index a4477e5..507d0ee 100644
--- a/arch/arm64/include/asm/syscall_wrapper.h
+++ b/arch/arm64/include/asm/syscall_wrapper.h
@@ -30,10 +30,10 @@
} \
static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
-#define COMPAT_SYSCALL_DEFINE0(sname) \
- asmlinkage long __arm64_compat_sys_##sname(void); \
- ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \
- asmlinkage long __arm64_compat_sys_##sname(void)
+#define COMPAT_SYSCALL_DEFINE0(sname) \
+ asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused); \
+ ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \
+ asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused)
#define COND_SYSCALL_COMPAT(name) \
cond_syscall(__arm64_compat_sys_##name);
@@ -62,11 +62,11 @@
static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
#ifndef SYSCALL_DEFINE0
-#define SYSCALL_DEFINE0(sname) \
- SYSCALL_METADATA(_##sname, 0); \
- asmlinkage long __arm64_sys_##sname(void); \
- ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \
- asmlinkage long __arm64_sys_##sname(void)
+#define SYSCALL_DEFINE0(sname) \
+ SYSCALL_METADATA(_##sname, 0); \
+ asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused); \
+ ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \
+ asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused)
#endif
#ifndef COND_SYSCALL
diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c
index f32359c..dd08083 100644
--- a/arch/arm64/kernel/module.c
+++ b/arch/arm64/kernel/module.c
@@ -98,10 +98,10 @@ static int reloc_data(enum aarch64_reloc_op op, void *place, u64 val, int len)
/*
* The ELF psABI for AArch64 documents the 16-bit and 32-bit place
- * relative relocations as having a range of [-2^15, 2^16) or
- * [-2^31, 2^32), respectively. However, in order to be able to detect
- * overflows reliably, we have to choose whether we interpret such
- * quantities as signed or as unsigned, and stick with it.
+ * relative and absolute relocations as having a range of [-2^15, 2^16)
+ * or [-2^31, 2^32), respectively. However, in order to be able to
+ * detect overflows reliably, we have to choose whether we interpret
+ * such quantities as signed or as unsigned, and stick with it.
* The way we organize our address space requires a signed
* interpretation of 32-bit relative references, so let's use that
* for all R_AARCH64_PRELxx relocations. This means our upper
@@ -111,13 +111,35 @@ static int reloc_data(enum aarch64_reloc_op op, void *place, u64 val, int len)
switch (len) {
case 16:
*(s16 *)place = sval;
- if (sval < S16_MIN || sval > S16_MAX)
- return -ERANGE;
+ switch (op) {
+ case RELOC_OP_ABS:
+ if (sval < 0 || sval > U16_MAX)
+ return -ERANGE;
+ break;
+ case RELOC_OP_PREL:
+ if (sval < S16_MIN || sval > S16_MAX)
+ return -ERANGE;
+ break;
+ default:
+ pr_err("Invalid 16-bit data relocation (%d)\n", op);
+ return 0;
+ }
break;
case 32:
*(s32 *)place = sval;
- if (sval < S32_MIN || sval > S32_MAX)
- return -ERANGE;
+ switch (op) {
+ case RELOC_OP_ABS:
+ if (sval < 0 || sval > U32_MAX)
+ return -ERANGE;
+ break;
+ case RELOC_OP_PREL:
+ if (sval < S32_MIN || sval > S32_MAX)
+ return -ERANGE;
+ break;
+ default:
+ pr_err("Invalid 32-bit data relocation (%d)\n", op);
+ return 0;
+ }
break;
case 64:
*(s64 *)place = sval;
diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c
index 6f91e81..fe20c46 100644
--- a/arch/arm64/kernel/sys.c
+++ b/arch/arm64/kernel/sys.c
@@ -47,22 +47,26 @@ SYSCALL_DEFINE1(arm64_personality, unsigned int, personality)
return ksys_personality(personality);
}
+asmlinkage long sys_ni_syscall(void);
+
+asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused)
+{
+ return sys_ni_syscall();
+}
+
/*
* Wrappers to pass the pt_regs argument.
*/
-#define sys_personality sys_arm64_personality
-
-asmlinkage long sys_ni_syscall(const struct pt_regs *);
-#define __arm64_sys_ni_syscall sys_ni_syscall
+#define __arm64_sys_personality __arm64_sys_arm64_personality
#undef __SYSCALL
#define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *);
#include <asm/unistd.h>
#undef __SYSCALL
-#define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)__arm64_##sym,
+#define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
const syscall_fn_t sys_call_table[__NR_syscalls] = {
- [0 ... __NR_syscalls - 1] = (syscall_fn_t)sys_ni_syscall,
+ [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall,
#include <asm/unistd.h>
};
diff --git a/arch/arm64/kernel/sys32.c b/arch/arm64/kernel/sys32.c
index 0f8bcb7..3c80a40 100644
--- a/arch/arm64/kernel/sys32.c
+++ b/arch/arm64/kernel/sys32.c
@@ -133,17 +133,14 @@ COMPAT_SYSCALL_DEFINE6(aarch32_fallocate, int, fd, int, mode,
return ksys_fallocate(fd, mode, arg_u64(offset), arg_u64(len));
}
-asmlinkage long sys_ni_syscall(const struct pt_regs *);
-#define __arm64_sys_ni_syscall sys_ni_syscall
-
#undef __SYSCALL
#define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *);
#include <asm/unistd32.h>
#undef __SYSCALL
-#define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)__arm64_##sym,
+#define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
const syscall_fn_t compat_sys_call_table[__NR_compat_syscalls] = {
- [0 ... __NR_compat_syscalls - 1] = (syscall_fn_t)sys_ni_syscall,
+ [0 ... __NR_compat_syscalls - 1] = __arm64_sys_ni_syscall,
#include <asm/unistd32.h>
};
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index e6be1a6..177c0f6 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -252,7 +252,10 @@ void arm64_force_sig_fault(int signo, int code, void __user *addr,
const char *str)
{
arm64_show_signal(signo, str);
- force_sig_fault(signo, code, addr, current);
+ if (signo == SIGKILL)
+ force_sig(SIGKILL, current);
+ else
+ force_sig_fault(signo, code, addr, current);
}
void arm64_force_sig_mceerr(int code, void __user *addr, short lsb,
