X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fsysctl.c;h=3b4efbe2644572a32576b1a591f003e9869699f0;hb=c11eef21aa119a41fa210b9693f2346997885bcf;hp=88c8ea8f5e8cd566fb386dcc4bf0daae8ca7c126;hpb=49a0c45833c9aa9852ba02c9df0f18029509d0a9;p=linux-2.6 diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 88c8ea8f5e..3b4efbe264 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -24,7 +24,7 @@ #include #include #include -#include +#include #include #include #include @@ -55,6 +55,8 @@ #include #endif +static int deprecated_sysctl_warning(struct __sysctl_args *args); + #if defined(CONFIG_SYSCTL) /* External variables not in a header file. */ @@ -163,9 +165,6 @@ static struct ctl_table fs_table[]; static struct ctl_table debug_table[]; static struct ctl_table dev_table[]; extern struct ctl_table random_table[]; -#ifdef CONFIG_UNIX98_PTYS -extern struct ctl_table pty_table[]; -#endif #ifdef CONFIG_INOTIFY_USER extern struct ctl_table inotify_table[]; #endif @@ -365,7 +364,6 @@ static struct ctl_table kern_table[] = { }, #ifdef CONFIG_PROC_SYSCTL { - .ctl_name = KERN_TAINTED, .procname = "tainted", .data = &tainted, .maxlen = sizeof(int), @@ -373,14 +371,15 @@ static struct ctl_table kern_table[] = { .proc_handler = &proc_dointvec_taint, }, #endif +#ifdef CONFIG_SECURITY_CAPABILITIES { - .ctl_name = KERN_CAP_BSET, .procname = "cap-bound", .data = &cap_bset, .maxlen = sizeof(kernel_cap_t), .mode = 0600, .proc_handler = &proc_dointvec_bset, }, +#endif /* def CONFIG_SECURITY_CAPABILITIES */ #ifdef CONFIG_BLK_DEV_INITRD { .ctl_name = KERN_REALROOTDEV, @@ -514,7 +513,6 @@ static struct ctl_table kern_table[] = { #endif #ifdef CONFIG_PROC_SYSCTL { - .ctl_name = KERN_CADPID, .procname = "cad_pid", .data = NULL, .maxlen = sizeof (int), @@ -536,14 +534,6 @@ static struct ctl_table kern_table[] = { .mode = 0555, .child = random_table, }, -#ifdef CONFIG_UNIX98_PTYS - { - .ctl_name = KERN_PTY, - .procname = "pty", - .mode = 0555, - .child = pty_table, - }, -#endif { .ctl_name = KERN_OVERFLOWUID, .procname = "overflowuid", @@ -650,7 +640,6 @@ static struct ctl_table kern_table[] = { .proc_handler = &proc_dointvec, }, { - .ctl_name = KERN_NMI_WATCHDOG, .procname = "nmi_watchdog", .data = &nmi_watchdog_enabled, .maxlen = sizeof (int), @@ -706,7 +695,6 @@ static struct ctl_table kern_table[] = { #endif #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) { - .ctl_name = KERN_ACPI_VIDEO_FLAGS, .procname = "acpi_video_flags", .data = &acpi_realmode_flags, .maxlen = sizeof (unsigned long), @@ -847,7 +835,6 @@ static struct ctl_table vm_table[] = { .extra2 = &one_hundred, }, { - .ctl_name = VM_DIRTY_WB_CS, .procname = "dirty_writeback_centisecs", .data = &dirty_writeback_interval, .maxlen = sizeof(dirty_writeback_interval), @@ -855,7 +842,6 @@ static struct ctl_table vm_table[] = { .proc_handler = &dirty_writeback_centisecs_handler, }, { - .ctl_name = VM_DIRTY_EXPIRE_CS, .procname = "dirty_expire_centisecs", .data = &dirty_expire_interval, .maxlen = sizeof(dirty_expire_interval), @@ -883,7 +869,6 @@ static struct ctl_table vm_table[] = { }, #ifdef CONFIG_HUGETLB_PAGE { - .ctl_name = VM_HUGETLB_PAGES, .procname = "nr_hugepages", .data = &max_huge_pages, .maxlen = sizeof(unsigned long), @@ -1116,7 +1101,6 @@ static struct ctl_table fs_table[] = { .proc_handler = &proc_dointvec, }, { - .ctl_name = FS_NRFILE, .procname = "file-nr", .data = &files_stat, .maxlen = 3*sizeof(int), @@ -1192,7 +1176,6 @@ static struct ctl_table fs_table[] = { .extra2 = &two, }, { - .ctl_name = FS_AIO_NR, .procname = "aio-nr", .data = &aio_nr, .maxlen = sizeof(aio_nr), @@ -1200,7 +1183,6 @@ static struct ctl_table fs_table[] = { .proc_handler = &proc_doulongvec_minmax, }, { - .ctl_name = FS_AIO_MAX_NR, .procname = "aio-max-nr", .data = &aio_max_nr, .maxlen = sizeof(aio_max_nr), @@ -1369,10 +1351,15 @@ asmlinkage long sys_sysctl(struct __sysctl_args __user *args) if (copy_from_user(&tmp, args, sizeof(tmp))) return -EFAULT; + error = deprecated_sysctl_warning(&tmp); + if (error) + goto out; + lock_kernel(); error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp, tmp.newval, tmp.newlen); unlock_kernel(); +out: return error; } #endif /* CONFIG_SYSCTL_SYSCALL */ @@ -1483,7 +1470,9 @@ static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) static __init int sysctl_init(void) { + int err; sysctl_set_parent(NULL, root_table); + err = sysctl_check_table(root_table); return 0; } @@ -1568,6 +1557,10 @@ struct ctl_table_header *register_sysctl_table(struct ctl_table * table) tmp->used = 0; tmp->unregistering = NULL; sysctl_set_parent(NULL, table); + if (sysctl_check_table(tmp->ctl_table)) { + kfree(tmp); + return NULL; + } spin_lock(&sysctl_lock); list_add_tail(&tmp->ctl_entry, &root_table_header.ctl_entry); spin_unlock(&sysctl_lock); @@ -1881,10 +1874,11 @@ static int do_proc_dointvec_bset_conv(int *negp, unsigned long *lvalp, return 0; } +#ifdef CONFIG_SECURITY_CAPABILITIES /* * init may raise the set. */ - + int proc_dointvec_bset(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos) { @@ -1894,10 +1888,11 @@ int proc_dointvec_bset(struct ctl_table *table, int write, struct file *filp, return -EPERM; } - op = is_init(current) ? OP_SET : OP_AND; + op = is_global_init(current) ? OP_SET : OP_AND; return do_proc_dointvec(table,write,filp,buffer,lenp,ppos, do_proc_dointvec_bset_conv,&op); } +#endif /* def CONFIG_SECURITY_CAPABILITIES */ /* * Taint values can only be increased @@ -2283,7 +2278,7 @@ static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp pid_t tmp; int r; - tmp = pid_nr(cad_pid); + tmp = pid_nr_ns(cad_pid, current->nsproxy->pid_ns); r = __do_proc_dointvec(&tmp, table, write, filp, buffer, lenp, ppos, NULL, NULL); @@ -2556,35 +2551,19 @@ int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen, asmlinkage long sys_sysctl(struct __sysctl_args __user *args) { - static int msg_count; struct __sysctl_args tmp; - int name[CTL_MAXNAME]; - int i; + int error; - /* Read in the sysctl name for better debug message logging */ if (copy_from_user(&tmp, args, sizeof(tmp))) return -EFAULT; - if (tmp.nlen <= 0 || tmp.nlen >= CTL_MAXNAME) - return -ENOTDIR; - for (i = 0; i < tmp.nlen; i++) - if (get_user(name[i], tmp.name + i)) - return -EFAULT; - /* Ignore accesses to kernel.version */ - if ((tmp.nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION)) - goto out; + error = deprecated_sysctl_warning(&tmp); - if (msg_count < 5) { - msg_count++; - printk(KERN_INFO - "warning: process `%s' used the removed sysctl " - "system call with ", current->comm); - for (i = 0; i < tmp.nlen; i++) - printk("%d.", name[i]); - printk("\n"); - } -out: - return -ENOSYS; + /* If no error reading the parameters then just -ENOSYS ... */ + if (!error) + error = -ENOSYS; + + return error; } int sysctl_data(struct ctl_table *table, int __user *name, int nlen, @@ -2624,6 +2603,33 @@ int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen, #endif /* CONFIG_SYSCTL_SYSCALL */ +static int deprecated_sysctl_warning(struct __sysctl_args *args) +{ + static int msg_count; + int name[CTL_MAXNAME]; + int i; + + /* Read in the sysctl name for better debug message logging */ + for (i = 0; i < args->nlen; i++) + if (get_user(name[i], args->name + i)) + return -EFAULT; + + /* Ignore accesses to kernel.version */ + if ((args->nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION)) + return 0; + + if (msg_count < 5) { + msg_count++; + printk(KERN_INFO + "warning: process `%s' used the deprecated sysctl " + "system call with ", current->comm); + for (i = 0; i < args->nlen; i++) + printk("%d.", name[i]); + printk("\n"); + } + return 0; +} + /* * No sense putting this after each symbol definition, twice, * exception granted :-)