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signal: Remove task parameter from force_sig

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All of the remaining callers pass current into force_sig so
remove the task parameter to make this obvious and to make
misuse more difficult in the future.

This also makes it clear force_sig passes current into force_sig_info.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2019-05-23 10:17:27 -05:00
parent cb44c9a0ab
commit 3cf5d076fb
76 changed files with 160 additions and 166 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
arch/mips/kernel/branch.c
View File

@@ -32,7 +32,7 @@ int __isa_exception_epc(struct pt_regs *regs)
/* Calculate exception PC in branch delay slot. */
if (__get_user(inst, (u16 __user *) msk_isa16_mode(epc))) {
/* This should never happen because delay slot was checked. */
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
return epc;
}
if (cpu_has_mips16) {
@@ -305,7 +305,7 @@ int __microMIPS_compute_return_epc(struct pt_regs *regs)
return 0;
sigsegv:
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
return -EFAULT;
}
@@ -328,7 +328,7 @@ int __MIPS16e_compute_return_epc(struct pt_regs *regs)
/* Read the instruction. */
addr = (u16 __user *)msk_isa16_mode(epc);
if (__get_user(inst.full, addr)) {
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
return -EFAULT;
}
@@ -343,7 +343,7 @@ int __MIPS16e_compute_return_epc(struct pt_regs *regs)
case MIPS16e_jal_op:
addr += 1;
if (__get_user(inst2, addr)) {
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
return -EFAULT;
}
fullinst = ((unsigned)inst.full << 16) | inst2;
@@ -829,17 +829,17 @@ int __compute_return_epc_for_insn(struct pt_regs *regs,
sigill_dsp:
pr_debug("%s: DSP branch but not DSP ASE - sending SIGILL.\n",
current->comm);
force_sig(SIGILL, current);
force_sig(SIGILL);
return -EFAULT;
sigill_r2r6:
pr_debug("%s: R2 branch but r2-to-r6 emulator is not present - sending SIGILL.\n",
current->comm);
force_sig(SIGILL, current);
force_sig(SIGILL);
return -EFAULT;
sigill_r6:
pr_debug("%s: R6 branch but no MIPSr6 ISA support - sending SIGILL.\n",
current->comm);
force_sig(SIGILL, current);
force_sig(SIGILL);
return -EFAULT;
}
EXPORT_SYMBOL_GPL(__compute_return_epc_for_insn);
@@ -859,7 +859,7 @@ int __compute_return_epc(struct pt_regs *regs)
*/
addr = (unsigned int __user *) epc;
if (__get_user(insn.word, addr)) {
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
return -EFAULT;
}
@@ -867,7 +867,7 @@ int __compute_return_epc(struct pt_regs *regs)
unaligned:
printk("%s: unaligned epc - sending SIGBUS.\n", current->comm);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
return -EFAULT;
}

2
arch/mips/kernel/kprobes.c
View File

@@ -232,7 +232,7 @@ static int evaluate_branch_instruction(struct kprobe *p, struct pt_regs *regs,
unaligned:
pr_notice("%s: unaligned epc - sending SIGBUS.\n", current->comm);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
return -EFAULT;
}

8
arch/mips/kernel/signal.c
View File

@@ -641,7 +641,7 @@ asmlinkage void sys_sigreturn(void)
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
force_sig(sig);
/*
* Don't let your children do this ...
@@ -654,7 +654,7 @@ asmlinkage void sys_sigreturn(void)
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
}
#endif /* CONFIG_TRAD_SIGNALS */
@@ -678,7 +678,7 @@ asmlinkage void sys_rt_sigreturn(void)
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
force_sig(sig);
if (restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
@@ -694,7 +694,7 @@ asmlinkage void sys_rt_sigreturn(void)
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
}
#ifdef CONFIG_TRAD_SIGNALS

4
arch/mips/kernel/signal_n32.c
View File

@@ -84,7 +84,7 @@ asmlinkage void sysn32_rt_sigreturn(void)
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
force_sig(sig);
if (compat_restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
@@ -100,7 +100,7 @@ asmlinkage void sysn32_rt_sigreturn(void)
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
}
static int setup_rt_frame_n32(void *sig_return, struct ksignal *ksig,

8
arch/mips/kernel/signal_o32.c
View File

@@ -171,7 +171,7 @@ asmlinkage void sys32_rt_sigreturn(void)
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
force_sig(sig);
if (compat_restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
@@ -187,7 +187,7 @@ asmlinkage void sys32_rt_sigreturn(void)
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
}
static int setup_rt_frame_32(void *sig_return, struct ksignal *ksig,
@@ -273,7 +273,7 @@ asmlinkage void sys32_sigreturn(void)
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
force_sig(sig);
/*
* Don't let your children do this ...
@@ -286,5 +286,5 @@ asmlinkage void sys32_sigreturn(void)
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
}

36
arch/mips/kernel/traps.c
View File

@@ -482,7 +482,7 @@ asmlinkage void do_be(struct pt_regs *regs)
goto out;
die_if_kernel("Oops", regs);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
out:
exception_exit(prev_state);
@@ -765,7 +765,7 @@ int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
return 1;
default:
force_sig(sig, current);
force_sig(sig);
return 1;
}
}
@@ -947,7 +947,7 @@ void do_trap_or_bp(struct pt_regs *regs, unsigned int code, int si_code,
break;
case BRK_BUG:
die_if_kernel("Kernel bug detected", regs);
force_sig(SIGTRAP, current);
force_sig(SIGTRAP);
break;
case BRK_MEMU:
/*
@@ -962,7 +962,7 @@ void do_trap_or_bp(struct pt_regs *regs, unsigned int code, int si_code,
return;
die_if_kernel("Math emu break/trap", regs);
force_sig(SIGTRAP, current);
force_sig(SIGTRAP);
break;
default:
scnprintf(b, sizeof(b), "%s instruction in kernel code", str);
@@ -970,7 +970,7 @@ void do_trap_or_bp(struct pt_regs *regs, unsigned int code, int si_code,
if (si_code) {
force_sig_fault(SIGTRAP, si_code, NULL, current);
} else {
force_sig(SIGTRAP, current);
force_sig(SIGTRAP);
}
}
}
@@ -1063,7 +1063,7 @@ out:
return;
out_sigsegv:
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
goto out;
}
@@ -1105,7 +1105,7 @@ out:
return;
out_sigsegv:
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
goto out;
}
@@ -1191,7 +1191,7 @@ no_r2_instr:
if (unlikely(status > 0)) {
regs->cp0_epc = old_epc; /* Undo skip-over. */
regs->regs[31] = old31;
force_sig(status, current);
force_sig(status);
}
out:
@@ -1220,7 +1220,7 @@ static int default_cu2_call(struct notifier_block *nfb, unsigned long action,
die_if_kernel("COP2: Unhandled kernel unaligned access or invalid "
"instruction", regs);
force_sig(SIGILL, current);
force_sig(SIGILL);
return NOTIFY_OK;
}
@@ -1383,7 +1383,7 @@ asmlinkage void do_cpu(struct pt_regs *regs)
if (unlikely(status > 0)) {
regs->cp0_epc = old_epc; /* Undo skip-over. */
regs->regs[31] = old31;
force_sig(status, current);
force_sig(status);
}
break;
@@ -1403,7 +1403,7 @@ asmlinkage void do_cpu(struct pt_regs *regs)
* emulator too.
*/
if (raw_cpu_has_fpu || !cpu_has_mips_4_5_64_r2_r6) {
force_sig(SIGILL, current);
force_sig(SIGILL);
break;
}
/* Fall through. */
@@ -1437,7 +1437,7 @@ asmlinkage void do_cpu(struct pt_regs *regs)
#else /* CONFIG_MIPS_FP_SUPPORT */
case 1:
case 3:
force_sig(SIGILL, current);
force_sig(SIGILL);
break;
#endif /* CONFIG_MIPS_FP_SUPPORT */
@@ -1464,7 +1464,7 @@ asmlinkage void do_msa_fpe(struct pt_regs *regs, unsigned int msacsr)
local_irq_enable();
die_if_kernel("do_msa_fpe invoked from kernel context!", regs);
force_sig(SIGFPE, current);
force_sig(SIGFPE);
out:
exception_exit(prev_state);
}
@@ -1477,7 +1477,7 @@ asmlinkage void do_msa(struct pt_regs *regs)
prev_state = exception_enter();
if (!cpu_has_msa || test_thread_flag(TIF_32BIT_FPREGS)) {
force_sig(SIGILL, current);
force_sig(SIGILL);
goto out;
}
@@ -1485,7 +1485,7 @@ asmlinkage void do_msa(struct pt_regs *regs)
err = enable_restore_fp_context(1);
if (err)
force_sig(SIGILL, current);
force_sig(SIGILL);
out:
exception_exit(prev_state);
}
@@ -1495,7 +1495,7 @@ asmlinkage void do_mdmx(struct pt_regs *regs)
enum ctx_state prev_state;
prev_state = exception_enter();
force_sig(SIGILL, current);
force_sig(SIGILL);
exception_exit(prev_state);
}
@@ -1592,7 +1592,7 @@ asmlinkage void do_mt(struct pt_regs *regs)
}
die_if_kernel("MIPS MT Thread exception in kernel", regs);
force_sig(SIGILL, current);
force_sig(SIGILL);
}
@@ -1601,7 +1601,7 @@ asmlinkage void do_dsp(struct pt_regs *regs)
if (cpu_has_dsp)
panic("Unexpected DSP exception");
force_sig(SIGILL, current);
force_sig(SIGILL);
}
asmlinkage void do_reserved(struct pt_regs *regs)

20
arch/mips/kernel/unaligned.c
View File

@@ -1365,20 +1365,20 @@ fault:
return;
die_if_kernel("Unhandled kernel unaligned access", regs);
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
return;
sigbus:
die_if_kernel("Unhandled kernel unaligned access", regs);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
return;
sigill:
die_if_kernel
("Unhandled kernel unaligned access or invalid instruction", regs);
force_sig(SIGILL, current);
force_sig(SIGILL);
}
/* Recode table from 16-bit register notation to 32-bit GPR. */
@@ -1991,20 +1991,20 @@ fault:
return;
die_if_kernel("Unhandled kernel unaligned access", regs);
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
return;
sigbus:
die_if_kernel("Unhandled kernel unaligned access", regs);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
return;
sigill:
die_if_kernel
("Unhandled kernel unaligned access or invalid instruction", regs);
force_sig(SIGILL, current);
force_sig(SIGILL);
}
static void emulate_load_store_MIPS16e(struct pt_regs *regs, void __user * addr)
@@ -2271,20 +2271,20 @@ fault:
return;
die_if_kernel("Unhandled kernel unaligned access", regs);
force_sig(SIGSEGV, current);
force_sig(SIGSEGV);
return;
sigbus:
die_if_kernel("Unhandled kernel unaligned access", regs);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
return;
sigill:
die_if_kernel
("Unhandled kernel unaligned access or invalid instruction", regs);
force_sig(SIGILL, current);
force_sig(SIGILL);
}
asmlinkage void do_ade(struct pt_regs *regs)
@@ -2364,7 +2364,7 @@ asmlinkage void do_ade(struct pt_regs *regs)
sigbus:
die_if_kernel("Kernel unaligned instruction access", regs);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
/*
* XXX On return from the signal handler we should advance the epc

2
arch/mips/sgi-ip22/ip22-berr.c
View File

@@ -98,7 +98,7 @@ void ip22_be_interrupt(int irq)
field, regs->cp0_epc, field, regs->regs[31]);
/* Assume it would be too dangerous to continue ... */
die_if_kernel("Oops", regs);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
}
static int ip22_be_handler(struct pt_regs *regs, int is_fixup)

2
arch/mips/sgi-ip22/ip28-berr.c
View File

@@ -462,7 +462,7 @@ void ip22_be_interrupt(int irq)
if (ip28_be_interrupt(regs) != MIPS_BE_DISCARD) {
/* Assume it would be too dangerous to continue ... */
die_if_kernel("Oops", regs);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
} else if (debug_be_interrupt)
show_regs(regs);
}

2
arch/mips/sgi-ip27/ip27-berr.c
View File

@@ -74,7 +74,7 @@ int ip27_be_handler(struct pt_regs *regs, int is_fixup)
show_regs(regs);
dump_tlb_all();
while(1);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
}
void __init ip27_be_init(void)

2
arch/mips/sgi-ip32/ip32-berr.c
View File

@@ -29,7 +29,7 @@ static int ip32_be_handler(struct pt_regs *regs, int is_fixup)
show_regs(regs);
dump_tlb_all();
while(1);
force_sig(SIGBUS, current);
force_sig(SIGBUS);
}
void __init ip32_be_init(void)