diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/compat_linux.c | 5 | ||||
| -rw-r--r-- | arch/s390/kernel/kprobes.c | 9 | ||||
| -rw-r--r-- | arch/s390/kernel/sys_s390.c | 20 |
3 files changed, 32 insertions, 2 deletions
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c index c46e3d48e41..e15e1489aef 100644 --- a/arch/s390/kernel/compat_linux.c +++ b/arch/s390/kernel/compat_linux.c @@ -357,11 +357,16 @@ asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf) { + compat_ino_t ino; int err; if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev)) return -EOVERFLOW; + ino = stat->ino; + if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino) + return -EOVERFLOW; + err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev); err |= put_user(stat->ino, &statbuf->st_ino); err |= put_user(stat->mode, &statbuf->st_mode); diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c index ca28fb0b379..4d9ff5ce4cb 100644 --- a/arch/s390/kernel/kprobes.c +++ b/arch/s390/kernel/kprobes.c @@ -369,11 +369,12 @@ void __kprobes kretprobe_trampoline_holder(void) int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs) { struct kretprobe_instance *ri = NULL; - struct hlist_head *head; + struct hlist_head *head, empty_rp; struct hlist_node *node, *tmp; unsigned long flags, orig_ret_address = 0; unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline; + INIT_HLIST_HEAD(&empty_rp); spin_lock_irqsave(&kretprobe_lock, flags); head = kretprobe_inst_table_head(current); @@ -399,7 +400,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs) ri->rp->handler(ri, regs); orig_ret_address = (unsigned long)ri->ret_addr; - recycle_rp_inst(ri); + recycle_rp_inst(ri, &empty_rp); if (orig_ret_address != trampoline_address) { /* @@ -417,6 +418,10 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs) spin_unlock_irqrestore(&kretprobe_lock, flags); preempt_enable_no_resched(); + hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) { + hlist_del(&ri->hlist); + kfree(ri); + } /* * By returning a non-zero value, we are telling * kprobe_handler() that we don't want the post_handler diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c index e351780bb66..584ed95f338 100644 --- a/arch/s390/kernel/sys_s390.c +++ b/arch/s390/kernel/sys_s390.c @@ -27,6 +27,7 @@ #include <linux/file.h> #include <linux/utsname.h> #include <linux/personality.h> +#include <linux/unistd.h> #include <asm/uaccess.h> #include <asm/ipc.h> @@ -266,3 +267,22 @@ s390_fadvise64_64(struct fadvise64_64_args __user *args) return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice); } +/* + * Do a system call from kernel instead of calling sys_execve so we + * end up with proper pt_regs. + */ +int kernel_execve(const char *filename, char *const argv[], char *const envp[]) +{ + register const char *__arg1 asm("2") = filename; + register char *const*__arg2 asm("3") = argv; + register char *const*__arg3 asm("4") = envp; + register long __svcres asm("2"); + asm volatile( + "svc %b1" + : "=d" (__svcres) + : "i" (__NR_execve), + "0" (__arg1), + "d" (__arg2), + "d" (__arg3) : "memory"); + return __svcres; +} |