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-rw-r--r--arch/arm64/include/asm/compat.h64
-rw-r--r--arch/arm64/include/uapi/asm/siginfo.h21
-rw-r--r--arch/arm64/kernel/debug-monitors.c13
-rw-r--r--arch/arm64/kernel/fpsimd.c2
-rw-r--r--arch/arm64/kernel/ptrace.c42
-rw-r--r--arch/arm64/kernel/signal32.c80
-rw-r--r--arch/arm64/mm/fault.c114
7 files changed, 107 insertions, 229 deletions
diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index a3c7f271ad4c..c00c62e1a4a3 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -150,70 +150,6 @@ typedef u32 compat_old_sigset_t;
typedef u32 compat_sigset_word;
-typedef union compat_sigval {
- compat_int_t sival_int;
- compat_uptr_t sival_ptr;
-} compat_sigval_t;
-
-typedef struct compat_siginfo {
- int si_signo;
- int si_errno;
- int si_code;
-
- union {
- int _pad[128/sizeof(int) - 3];
-
- /* kill() */
- struct {
- compat_pid_t _pid; /* sender's pid */
- __compat_uid32_t _uid; /* sender's uid */
- } _kill;
-
- /* POSIX.1b timers */
- struct {
- compat_timer_t _tid; /* timer id */
- int _overrun; /* overrun count */
- compat_sigval_t _sigval; /* same as below */
- int _sys_private; /* not to be passed to user */
- } _timer;
-
- /* POSIX.1b signals */
- struct {
- compat_pid_t _pid; /* sender's pid */
- __compat_uid32_t _uid; /* sender's uid */
- compat_sigval_t _sigval;
- } _rt;
-
- /* SIGCHLD */
- struct {
- compat_pid_t _pid; /* which child */
- __compat_uid32_t _uid; /* sender's uid */
- int _status; /* exit code */
- compat_clock_t _utime;
- compat_clock_t _stime;
- } _sigchld;
-
- /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
- struct {
- compat_uptr_t _addr; /* faulting insn/memory ref. */
- short _addr_lsb; /* LSB of the reported address */
- } _sigfault;
-
- /* SIGPOLL */
- struct {
- compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
- int _fd;
- } _sigpoll;
-
- /* SIGSYS */
- struct {
- compat_uptr_t _call_addr; /* calling user insn */
- int _syscall; /* triggering system call number */
- compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */
- } _sigsys;
- } _sifields;
-} compat_siginfo_t;
-
#define COMPAT_OFF_T_MAX 0x7fffffff
/*
diff --git a/arch/arm64/include/uapi/asm/siginfo.h b/arch/arm64/include/uapi/asm/siginfo.h
index 574d12f86039..9b4d91277742 100644
--- a/arch/arm64/include/uapi/asm/siginfo.h
+++ b/arch/arm64/include/uapi/asm/siginfo.h
@@ -21,4 +21,25 @@
#include <asm-generic/siginfo.h>
+/*
+ * SIGFPE si_codes
+ */
+#ifdef __KERNEL__
+#define FPE_FIXME 0 /* Broken dup of SI_USER */
+#endif /* __KERNEL__ */
+
+/*
+ * SIGBUS si_codes
+ */
+#ifdef __KERNEL__
+#define BUS_FIXME 0 /* Broken dup of SI_USER */
+#endif /* __KERNEL__ */
+
+/*
+ * SIGTRAP si_codes
+ */
+#ifdef __KERNEL__
+#define TRAP_FIXME 0 /* Broken dup of SI_USER */
+#endif /* __KERNEL__ */
+
#endif
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index a88b6ccebbb4..53781f5687c5 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -209,12 +209,13 @@ NOKPROBE_SYMBOL(call_step_hook);
static void send_user_sigtrap(int si_code)
{
struct pt_regs *regs = current_pt_regs();
- siginfo_t info = {
- .si_signo = SIGTRAP,
- .si_errno = 0,
- .si_code = si_code,
- .si_addr = (void __user *)instruction_pointer(regs),
- };
+ siginfo_t info;
+
+ clear_siginfo(&info);
+ info.si_signo = SIGTRAP;
+ info.si_errno = 0;
+ info.si_code = si_code;
+ info.si_addr = (void __user *)instruction_pointer(regs);
if (WARN_ON(!user_mode(regs)))
return;
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 55fb544072f6..e7226c4c7493 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -867,7 +867,7 @@ asmlinkage void do_fpsimd_acc(unsigned int esr, struct pt_regs *regs)
asmlinkage void do_fpsimd_exc(unsigned int esr, struct pt_regs *regs)
{
siginfo_t info;
- unsigned int si_code = 0;
+ unsigned int si_code = FPE_FIXME;
if (esr & FPEXC_IOF)
si_code = FPE_FLTINV;
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 7c44658b316d..6618036ae6d4 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -180,34 +180,34 @@ static void ptrace_hbptriggered(struct perf_event *bp,
struct pt_regs *regs)
{
struct arch_hw_breakpoint *bkpt = counter_arch_bp(bp);
- siginfo_t info = {
- .si_signo = SIGTRAP,
- .si_errno = 0,
- .si_code = TRAP_HWBKPT,
- .si_addr = (void __user *)(bkpt->trigger),
- };
+ siginfo_t info;
-#ifdef CONFIG_COMPAT
- int i;
+ clear_siginfo(&info);
+ info.si_signo = SIGTRAP;
+ info.si_errno = 0;
+ info.si_code = TRAP_HWBKPT;
+ info.si_addr = (void __user *)(bkpt->trigger);
- if (!is_compat_task())
- goto send_sig;
+#ifdef CONFIG_COMPAT
+ if (is_compat_task()) {
+ int si_errno = 0;
+ int i;
- for (i = 0; i < ARM_MAX_BRP; ++i) {
- if (current->thread.debug.hbp_break[i] == bp) {
- info.si_errno = (i << 1) + 1;
- break;
+ for (i = 0; i < ARM_MAX_BRP; ++i) {
+ if (current->thread.debug.hbp_break[i] == bp) {
+ si_errno = (i << 1) + 1;
+ break;
+ }
}
- }
- for (i = 0; i < ARM_MAX_WRP; ++i) {
- if (current->thread.debug.hbp_watch[i] == bp) {
- info.si_errno = -((i << 1) + 1);
- break;
+ for (i = 0; i < ARM_MAX_WRP; ++i) {
+ if (current->thread.debug.hbp_watch[i] == bp) {
+ si_errno = -((i << 1) + 1);
+ break;
+ }
}
+ force_sig_ptrace_errno_trap(si_errno, (void __user *)bkpt->trigger);
}
-
-send_sig:
#endif
force_sig_info(SIGTRAP, &info, current);
}
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index a124140c0926..79feb861929b 100644
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -125,86 +125,6 @@ static inline int get_sigset_t(sigset_t *set,
return 0;
}
-int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
-{
- int err;
-
- if (!access_ok(VERIFY_WRITE, to, sizeof(*to)))
- return -EFAULT;
-
- /* If you change siginfo_t structure, please be sure
- * this code is fixed accordingly.
- * It should never copy any pad contained in the structure
- * to avoid security leaks, but must copy the generic
- * 3 ints plus the relevant union member.
- * This routine must convert siginfo from 64bit to 32bit as well
- * at the same time.
- */
- err = __put_user(from->si_signo, &to->si_signo);
- err |= __put_user(from->si_errno, &to->si_errno);
- err |= __put_user(from->si_code, &to->si_code);
- if (from->si_code < 0)
- err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad,
- SI_PAD_SIZE);
- else switch (siginfo_layout(from->si_signo, from->si_code)) {
- case SIL_KILL:
- err |= __put_user(from->si_pid, &to->si_pid);
- err |= __put_user(from->si_uid, &to->si_uid);
- break;
- case SIL_TIMER:
- err |= __put_user(from->si_tid, &to->si_tid);
- err |= __put_user(from->si_overrun, &to->si_overrun);
- err |= __put_user(from->si_int, &to->si_int);
- break;
- case SIL_POLL:
- err |= __put_user(from->si_band, &to->si_band);
- err |= __put_user(from->si_fd, &to->si_fd);
- break;
- case SIL_FAULT:
- err |= __put_user((compat_uptr_t)(unsigned long)from->si_addr,
- &to->si_addr);
-#ifdef BUS_MCEERR_AO
- /*
- * Other callers might not initialize the si_lsb field,
- * so check explicitly for the right codes here.
- */
- if (from->si_signo == SIGBUS &&
- (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO))
- err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);
-#endif
- break;
- case SIL_CHLD:
- err |= __put_user(from->si_pid, &to->si_pid);
- err |= __put_user(from->si_uid, &to->si_uid);
- err |= __put_user(from->si_status, &to->si_status);
- err |= __put_user(from->si_utime, &to->si_utime);
- err |= __put_user(from->si_stime, &to->si_stime);
- break;
- case SIL_RT:
- err |= __put_user(from->si_pid, &to->si_pid);
- err |= __put_user(from->si_uid, &to->si_uid);
- err |= __put_user(from->si_int, &to->si_int);
- break;
- case SIL_SYS:
- err |= __put_user((compat_uptr_t)(unsigned long)
- from->si_call_addr, &to->si_call_addr);
- err |= __put_user(from->si_syscall, &to->si_syscall);
- err |= __put_user(from->si_arch, &to->si_arch);
- break;
- }
- return err;
-}
-
-int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
-{
- if (copy_from_user(to, from, __ARCH_SI_PREAMBLE_SIZE) ||
- copy_from_user(to->_sifields._pad,
- from->_sifields._pad, SI_PAD_SIZE))
- return -EFAULT;
-
- return 0;
-}
-
/*
* VFP save/restore code.
*
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 6c30cf92f492..ce441d29e7f6 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -596,7 +596,7 @@ static int do_sea(unsigned long addr, unsigned int esr, struct pt_regs *regs)
info.si_signo = SIGBUS;
info.si_errno = 0;
- info.si_code = 0;
+ info.si_code = BUS_FIXME;
if (esr & ESR_ELx_FnV)
info.si_addr = NULL;
else
@@ -607,70 +607,70 @@ static int do_sea(unsigned long addr, unsigned int esr, struct pt_regs *regs)
}
static const struct fault_info fault_info[] = {
- { do_bad, SIGBUS, 0, "ttbr address size fault" },
- { do_bad, SIGBUS, 0, "level 1 address size fault" },
- { do_bad, SIGBUS, 0, "level 2 address size fault" },
- { do_bad, SIGBUS, 0, "level 3 address size fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "ttbr address size fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "level 1 address size fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "level 2 address size fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "level 3 address size fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 0 translation fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 1 translation fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 2 translation fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 3 translation fault" },
- { do_bad, SIGBUS, 0, "unknown 8" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 8" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 1 access flag fault" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 2 access flag fault" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 3 access flag fault" },
- { do_bad, SIGBUS, 0, "unknown 12" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 12" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 1 permission fault" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 2 permission fault" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 3 permission fault" },
- { do_sea, SIGBUS, 0, "synchronous external abort" },
- { do_bad, SIGBUS, 0, "unknown 17" },
- { do_bad, SIGBUS, 0, "unknown 18" },
- { do_bad, SIGBUS, 0, "unknown 19" },
- { do_sea, SIGBUS, 0, "level 0 (translation table walk)" },
- { do_sea, SIGBUS, 0, "level 1 (translation table walk)" },
- { do_sea, SIGBUS, 0, "level 2 (translation table walk)" },
- { do_sea, SIGBUS, 0, "level 3 (translation table walk)" },
- { do_sea, SIGBUS, 0, "synchronous parity or ECC error" }, // Reserved when RAS is implemented
- { do_bad, SIGBUS, 0, "unknown 25" },
- { do_bad, SIGBUS, 0, "unknown 26" },
- { do_bad, SIGBUS, 0, "unknown 27" },
- { do_sea, SIGBUS, 0, "level 0 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
- { do_sea, SIGBUS, 0, "level 1 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
- { do_sea, SIGBUS, 0, "level 2 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
- { do_sea, SIGBUS, 0, "level 3 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
- { do_bad, SIGBUS, 0, "unknown 32" },
+ { do_sea, SIGBUS, BUS_FIXME, "synchronous external abort" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 17" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 18" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 19" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 0 (translation table walk)" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 1 (translation table walk)" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 2 (translation table walk)" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 3 (translation table walk)" },
+ { do_sea, SIGBUS, BUS_FIXME, "synchronous parity or ECC error" }, // Reserved when RAS is implemented
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 25" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 26" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 27" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 0 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
+ { do_sea, SIGBUS, BUS_FIXME, "level 1 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
+ { do_sea, SIGBUS, BUS_FIXME, "level 2 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
+ { do_sea, SIGBUS, BUS_FIXME, "level 3 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 32" },
{ do_alignment_fault, SIGBUS, BUS_ADRALN, "alignment fault" },
- { do_bad, SIGBUS, 0, "unknown 34" },
- { do_bad, SIGBUS, 0, "unknown 35" },
- { do_bad, SIGBUS, 0, "unknown 36" },
- { do_bad, SIGBUS, 0, "unknown 37" },
- { do_bad, SIGBUS, 0, "unknown 38" },
- { do_bad, SIGBUS, 0, "unknown 39" },
- { do_bad, SIGBUS, 0, "unknown 40" },
- { do_bad, SIGBUS, 0, "unknown 41" },
- { do_bad, SIGBUS, 0, "unknown 42" },
- { do_bad, SIGBUS, 0, "unknown 43" },
- { do_bad, SIGBUS, 0, "unknown 44" },
- { do_bad, SIGBUS, 0, "unknown 45" },
- { do_bad, SIGBUS, 0, "unknown 46" },
- { do_bad, SIGBUS, 0, "unknown 47" },
- { do_bad, SIGBUS, 0, "TLB conflict abort" },
- { do_bad, SIGBUS, 0, "Unsupported atomic hardware update fault" },
- { do_bad, SIGBUS, 0, "unknown 50" },
- { do_bad, SIGBUS, 0, "unknown 51" },
- { do_bad, SIGBUS, 0, "implementation fault (lockdown abort)" },
- { do_bad, SIGBUS, 0, "implementation fault (unsupported exclusive)" },
- { do_bad, SIGBUS, 0, "unknown 54" },
- { do_bad, SIGBUS, 0, "unknown 55" },
- { do_bad, SIGBUS, 0, "unknown 56" },
- { do_bad, SIGBUS, 0, "unknown 57" },
- { do_bad, SIGBUS, 0, "unknown 58" },
- { do_bad, SIGBUS, 0, "unknown 59" },
- { do_bad, SIGBUS, 0, "unknown 60" },
- { do_bad, SIGBUS, 0, "section domain fault" },
- { do_bad, SIGBUS, 0, "page domain fault" },
- { do_bad, SIGBUS, 0, "unknown 63" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 34" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 35" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 36" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 37" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 38" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 39" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 40" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 41" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 42" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 43" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 44" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 45" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 46" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 47" },
+ { do_bad, SIGBUS, BUS_FIXME, "TLB conflict abort" },
+ { do_bad, SIGBUS, BUS_FIXME, "Unsupported atomic hardware update fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 50" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 51" },
+ { do_bad, SIGBUS, BUS_FIXME, "implementation fault (lockdown abort)" },
+ { do_bad, SIGBUS, BUS_FIXME, "implementation fault (unsupported exclusive)" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 54" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 55" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 56" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 57" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 58" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 59" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 60" },
+ { do_bad, SIGBUS, BUS_FIXME, "section domain fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "page domain fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 63" },
};
int handle_guest_sea(phys_addr_t addr, unsigned int esr)
@@ -756,11 +756,11 @@ static struct fault_info __refdata debug_fault_info[] = {
{ do_bad, SIGTRAP, TRAP_HWBKPT, "hardware breakpoint" },
{ do_bad, SIGTRAP, TRAP_HWBKPT, "hardware single-step" },
{ do_bad, SIGTRAP, TRAP_HWBKPT, "hardware watchpoint" },
- { do_bad, SIGBUS, 0, "unknown 3" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 3" },
{ do_bad, SIGTRAP, TRAP_BRKPT, "aarch32 BKPT" },
- { do_bad, SIGTRAP, 0, "aarch32 vector catch" },
+ { do_bad, SIGTRAP, TRAP_FIXME, "aarch32 vector catch" },
{ early_brk64, SIGTRAP, TRAP_BRKPT, "aarch64 BRK" },
- { do_bad, SIGBUS, 0, "unknown 7" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 7" },
};
void __init hook_debug_fault_code(int nr,
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 09:00:18 +0000