static void
iomap_to_bh(struct inode *inode, sector_t block, struct buffer_head *bh,
- struct iomap *iomap)
+ const struct iomap *iomap)
{
loff_t offset = block << inode->i_blkbits;
}
int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
- get_block_t *get_block, struct iomap *iomap)
+ get_block_t *get_block, const struct iomap *iomap)
{
unsigned from = pos & (PAGE_SIZE - 1);
unsigned to = from + len;
}
EXPORT_SYMBOL(try_to_free_buffers);
- /*
- * There are no bdflush tunables left. But distributions are
- * still running obsolete flush daemons, so we terminate them here.
- *
- * Use of bdflush() is deprecated and will be removed in a future kernel.
- * The `flush-X' kernel threads fully replace bdflush daemons and this call.
- */
- SYSCALL_DEFINE2(bdflush, int, func, long, data)
- {
- static int msg_count;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (msg_count < 5) {
- msg_count++;
- printk(KERN_INFO
- "warning: process `%s' used the obsolete bdflush"
- " system call\n", current->comm);
- printk(KERN_INFO "Fix your initscripts?\n");
- }
-
- if (func == 1)
- do_exit(0);
- return 0;
- }
-
/*
* Buffer-head allocation
*/
schedule();
}
-#ifdef __ARCH_SI_TRAPNO
-# define ___ARCH_SI_TRAPNO(_a1) , _a1
-#else
-# define ___ARCH_SI_TRAPNO(_a1)
-#endif
#ifdef __ia64__
# define ___ARCH_SI_IA64(_a1, _a2, _a3) , _a1, _a2, _a3
#else
#endif
int force_sig_fault_to_task(int sig, int code, void __user *addr
- ___ARCH_SI_TRAPNO(int trapno)
___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
, struct task_struct *t);
int force_sig_fault(int sig, int code, void __user *addr
- ___ARCH_SI_TRAPNO(int trapno)
___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr));
int send_sig_fault(int sig, int code, void __user *addr
- ___ARCH_SI_TRAPNO(int trapno)
___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
, struct task_struct *t);
int force_sig_perf(void __user *addr, u32 type, u64 sig_data);
int force_sig_ptrace_errno_trap(int errno, void __user *addr);
+int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno);
+int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno,
+ struct task_struct *t);
+ int force_sig_seccomp(int syscall, int reason, bool force_coredump);
extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *);
extern void force_sigsegv(int sig);
spin_unlock_irqrestore(&task->sighand->siglock, *flags);
}
+#ifdef CONFIG_LOCKDEP
+extern void lockdep_assert_task_sighand_held(struct task_struct *task);
+#else
+static inline void lockdep_assert_task_sighand_held(struct task_struct *task) { }
+#endif
+
static inline unsigned long task_rlimit(const struct task_struct *task,
unsigned int limit)
{
smp_store_release(&thread->seccomp.filter,
caller->seccomp.filter);
atomic_set(&thread->seccomp.filter_count,
- atomic_read(&thread->seccomp.filter_count));
+ atomic_read(&caller->seccomp.filter_count));
/*
* Don't let an unprivileged task work around
refcount_inc(&orig->users);
}
- static void seccomp_init_siginfo(kernel_siginfo_t *info, int syscall, int reason)
- {
- clear_siginfo(info);
- info->si_signo = SIGSYS;
- info->si_code = SYS_SECCOMP;
- info->si_call_addr = (void __user *)KSTK_EIP(current);
- info->si_errno = reason;
- info->si_arch = syscall_get_arch(current);
- info->si_syscall = syscall;
- }
-
- /**
- * seccomp_send_sigsys - signals the task to allow in-process syscall emulation
- * @syscall: syscall number to send to userland
- * @reason: filter-supplied reason code to send to userland (via si_errno)
- *
- * Forces a SIGSYS with a code of SYS_SECCOMP and related sigsys info.
- */
- static void seccomp_send_sigsys(int syscall, int reason)
- {
- struct kernel_siginfo info;
- seccomp_init_siginfo(&info, syscall, reason);
- force_sig_info(&info);
- }
#endif /* CONFIG_SECCOMP_FILTER */
/* For use with seccomp_actions_logged */
/* Show the handler the original registers. */
syscall_rollback(current, current_pt_regs());
/* Let the filter pass back 16 bits of data. */
- seccomp_send_sigsys(this_syscall, data);
+ force_sig_seccomp(this_syscall, data, false);
goto skip;
case SECCOMP_RET_TRACE:
seccomp_log(this_syscall, SIGSYS, action, true);
/* Dump core only if this is the last remaining thread. */
if (action != SECCOMP_RET_KILL_THREAD ||
- get_nr_threads(current) == 1) {
- kernel_siginfo_t info;
-
+ (atomic_read(¤t->signal->live) == 1)) {
/* Show the original registers in the dump. */
syscall_rollback(current, current_pt_regs());
- /* Trigger a manual coredump since do_exit skips it. */
- seccomp_init_siginfo(&info, this_syscall, data);
- do_coredump(&info);
- }
- if (action == SECCOMP_RET_KILL_THREAD)
+ /* Trigger a coredump with SIGSYS */
+ force_sig_seccomp(this_syscall, data, true);
+ } else {
do_exit(SIGSYS);
- else
- do_group_exit(SIGSYS);
+ }
+ return -1; /* skip the syscall go directly to signal handling */
}
unreachable();
#include <asm/unistd.h>
#include <asm/siginfo.h>
#include <asm/cacheflush.h>
+ #include <asm/syscall.h> /* for syscall_get_* */
/*
* SLAB caches for signal bits.
case SIL_FAULT_MCEERR:
case SIL_FAULT_BNDERR:
case SIL_FAULT_PKUERR:
- case SIL_PERF_EVENT:
+ case SIL_FAULT_PERF_EVENT:
case SIL_SYS:
ret = false;
break;
* that is why we also clear SIGNAL_UNKILLABLE.
*/
static int
- force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t)
+ force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t, bool sigdfl)
{
unsigned long int flags;
int ret, blocked, ignored;
action = &t->sighand->action[sig-1];
ignored = action->sa.sa_handler == SIG_IGN;
blocked = sigismember(&t->blocked, sig);
- if (blocked || ignored) {
+ if (blocked || ignored || sigdfl) {
action->sa.sa_handler = SIG_DFL;
if (blocked) {
sigdelset(&t->blocked, sig);
int force_sig_info(struct kernel_siginfo *info)
{
- return force_sig_info_to_task(info, current);
+ return force_sig_info_to_task(info, current, false);
}
/*
return sighand;
}
+#ifdef CONFIG_LOCKDEP
+void lockdep_assert_task_sighand_held(struct task_struct *task)
+{
+ struct sighand_struct *sighand;
+
+ rcu_read_lock();
+ sighand = rcu_dereference(task->sighand);
+ if (sighand)
+ lockdep_assert_held(&sighand->siglock);
+ else
+ WARN_ON_ONCE(1);
+ rcu_read_unlock();
+}
+#endif
+
/*
* send signal info to all the members of a group
*/
}
int force_sig_fault_to_task(int sig, int code, void __user *addr
- ___ARCH_SI_TRAPNO(int trapno)
___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
, struct task_struct *t)
{
info.si_errno = 0;
info.si_code = code;
info.si_addr = addr;
-#ifdef __ARCH_SI_TRAPNO
- info.si_trapno = trapno;
-#endif
#ifdef __ia64__
info.si_imm = imm;
info.si_flags = flags;
info.si_isr = isr;
#endif
- return force_sig_info_to_task(&info, t);
+ return force_sig_info_to_task(&info, t, false);
}
int force_sig_fault(int sig, int code, void __user *addr
- ___ARCH_SI_TRAPNO(int trapno)
___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr))
{
return force_sig_fault_to_task(sig, code, addr
- ___ARCH_SI_TRAPNO(trapno)
___ARCH_SI_IA64(imm, flags, isr), current);
}
int send_sig_fault(int sig, int code, void __user *addr
- ___ARCH_SI_TRAPNO(int trapno)
___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
, struct task_struct *t)
{
info.si_errno = 0;
info.si_code = code;
info.si_addr = addr;
-#ifdef __ARCH_SI_TRAPNO
- info.si_trapno = trapno;
-#endif
#ifdef __ia64__
info.si_imm = imm;
info.si_flags = flags;
return force_sig_info(&info);
}
+ /**
+ * force_sig_seccomp - signals the task to allow in-process syscall emulation
+ * @syscall: syscall number to send to userland
+ * @reason: filter-supplied reason code to send to userland (via si_errno)
+ *
+ * Forces a SIGSYS with a code of SYS_SECCOMP and related sigsys info.
+ */
+ int force_sig_seccomp(int syscall, int reason, bool force_coredump)
+ {
+ struct kernel_siginfo info;
+
+ clear_siginfo(&info);
+ info.si_signo = SIGSYS;
+ info.si_code = SYS_SECCOMP;
+ info.si_call_addr = (void __user *)KSTK_EIP(current);
+ info.si_errno = reason;
+ info.si_arch = syscall_get_arch(current);
+ info.si_syscall = syscall;
+ return force_sig_info_to_task(&info, current, force_coredump);
+ }
+
/* For the crazy architectures that include trap information in
* the errno field, instead of an actual errno value.
*/
return force_sig_info(&info);
}
+/* For the rare architectures that include trap information using
+ * si_trapno.
+ */
+int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno)
+{
+ struct kernel_siginfo info;
+
+ clear_siginfo(&info);
+ info.si_signo = sig;
+ info.si_errno = 0;
+ info.si_code = code;
+ info.si_addr = addr;
+ info.si_trapno = trapno;
+ return force_sig_info(&info);
+}
+
+/* For the rare architectures that include trap information using
+ * si_trapno.
+ */
+int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno,
+ struct task_struct *t)
+{
+ struct kernel_siginfo info;
+
+ clear_siginfo(&info);
+ info.si_signo = sig;
+ info.si_errno = 0;
+ info.si_code = code;
+ info.si_addr = addr;
+ info.si_trapno = trapno;
+ return send_sig_info(info.si_signo, &info, t);
+}
+
int kill_pgrp(struct pid *pid, int sig, int priv)
{
int ret;
case SIL_FAULT_MCEERR:
case SIL_FAULT_BNDERR:
case SIL_FAULT_PKUERR:
- case SIL_PERF_EVENT:
+ case SIL_FAULT_PERF_EVENT:
ksig->info.si_addr = arch_untagged_si_addr(
ksig->info.si_addr, ksig->sig, ksig->info.si_code);
break;
layout = SIL_FAULT_PKUERR;
#endif
else if ((sig == SIGTRAP) && (si_code == TRAP_PERF))
- layout = SIL_PERF_EVENT;
-#ifdef __ARCH_SI_TRAPNO
- else if (layout == SIL_FAULT)
+ layout = SIL_FAULT_PERF_EVENT;
+ else if (IS_ENABLED(CONFIG_SPARC) &&
+ (sig == SIGILL) && (si_code == ILL_ILLTRP))
+ layout = SIL_FAULT_TRAPNO;
+ else if (IS_ENABLED(CONFIG_ALPHA) &&
+ ((sig == SIGFPE) ||
+ ((sig == SIGTRAP) && (si_code == TRAP_UNK))))
layout = SIL_FAULT_TRAPNO;
-#endif
}
else if (si_code <= NSIGPOLL)
layout = SIL_POLL;
to->si_addr = ptr_to_compat(from->si_addr);
to->si_pkey = from->si_pkey;
break;
- case SIL_PERF_EVENT:
+ case SIL_FAULT_PERF_EVENT:
to->si_addr = ptr_to_compat(from->si_addr);
to->si_perf_data = from->si_perf_data;
to->si_perf_type = from->si_perf_type;
to->si_addr = compat_ptr(from->si_addr);
to->si_pkey = from->si_pkey;
break;
- case SIL_PERF_EVENT:
+ case SIL_FAULT_PERF_EVENT:
to->si_addr = compat_ptr(from->si_addr);
to->si_perf_data = from->si_perf_data;
to->si_perf_type = from->si_perf_type;
projects / J-linux.git / commitdiff