diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/Makefile | 2 | ||||
| -rw-r--r-- | kernel/audit_fsnotify.c | 22 | ||||
| -rw-r--r-- | kernel/audit_tree.c | 10 | ||||
| -rw-r--r-- | kernel/audit_watch.c | 19 | ||||
| -rw-r--r-- | kernel/kexec_file.c | 16 | ||||
| -rw-r--r-- | kernel/regset.c | 76 | ||||
| -rw-r--r-- | kernel/trace/trace.c | 3 |
7 files changed, 113 insertions, 35 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index bdeb77e27042..5350fd292910 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -10,7 +10,7 @@ obj-y = fork.o exec_domain.o panic.o \ extable.o params.o \ kthread.o sys_ni.o nsproxy.o \ notifier.o ksysfs.o cred.o reboot.o \ - async.o range.o smpboot.o ucount.o + async.o range.o smpboot.o ucount.o regset.o obj-$(CONFIG_BPFILTER) += usermode_driver.o obj-$(CONFIG_MODULES) += kmod.o diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c index 3596448bfdab..bfcfcd61adb6 100644 --- a/kernel/audit_fsnotify.c +++ b/kernel/audit_fsnotify.c @@ -36,7 +36,7 @@ static struct fsnotify_group *audit_fsnotify_group; /* fsnotify events we care about. */ #define AUDIT_FS_EVENTS (FS_MOVE | FS_CREATE | FS_DELETE | FS_DELETE_SELF |\ - FS_MOVE_SELF | FS_EVENT_ON_CHILD) + FS_MOVE_SELF) static void audit_fsnotify_mark_free(struct audit_fsnotify_mark *audit_mark) { @@ -152,35 +152,31 @@ static void audit_autoremove_mark_rule(struct audit_fsnotify_mark *audit_mark) } /* Update mark data in audit rules based on fsnotify events. */ -static int audit_mark_handle_event(struct fsnotify_group *group, - struct inode *to_tell, - u32 mask, const void *data, int data_type, - const struct qstr *dname, u32 cookie, - struct fsnotify_iter_info *iter_info) +static int audit_mark_handle_event(struct fsnotify_mark *inode_mark, u32 mask, + struct inode *inode, struct inode *dir, + const struct qstr *dname) { - struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info); struct audit_fsnotify_mark *audit_mark; - const struct inode *inode = fsnotify_data_inode(data, data_type); audit_mark = container_of(inode_mark, struct audit_fsnotify_mark, mark); - BUG_ON(group != audit_fsnotify_group); - - if (WARN_ON(!inode)) + if (WARN_ON_ONCE(inode_mark->group != audit_fsnotify_group) || + WARN_ON_ONCE(!inode)) return 0; if (mask & (FS_CREATE|FS_MOVED_TO|FS_DELETE|FS_MOVED_FROM)) { if (audit_compare_dname_path(dname, audit_mark->path, AUDIT_NAME_FULL)) return 0; audit_update_mark(audit_mark, inode); - } else if (mask & (FS_DELETE_SELF|FS_UNMOUNT|FS_MOVE_SELF)) + } else if (mask & (FS_DELETE_SELF|FS_UNMOUNT|FS_MOVE_SELF)) { audit_autoremove_mark_rule(audit_mark); + } return 0; } static const struct fsnotify_ops audit_mark_fsnotify_ops = { - .handle_event = audit_mark_handle_event, + .handle_inode_event = audit_mark_handle_event, .free_mark = audit_fsnotify_free_mark, }; diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c index 1b7a2f041793..83e1c07fc99e 100644 --- a/kernel/audit_tree.c +++ b/kernel/audit_tree.c @@ -1035,11 +1035,9 @@ static void evict_chunk(struct audit_chunk *chunk) audit_schedule_prune(); } -static int audit_tree_handle_event(struct fsnotify_group *group, - struct inode *to_tell, - u32 mask, const void *data, int data_type, - const struct qstr *file_name, u32 cookie, - struct fsnotify_iter_info *iter_info) +static int audit_tree_handle_event(struct fsnotify_mark *mark, u32 mask, + struct inode *inode, struct inode *dir, + const struct qstr *file_name) { return 0; } @@ -1068,7 +1066,7 @@ static void audit_tree_freeing_mark(struct fsnotify_mark *mark, } static const struct fsnotify_ops audit_tree_ops = { - .handle_event = audit_tree_handle_event, + .handle_inode_event = audit_tree_handle_event, .freeing_mark = audit_tree_freeing_mark, .free_mark = audit_tree_destroy_watch, }; diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c index e09c551ae52d..246e5ba704c0 100644 --- a/kernel/audit_watch.c +++ b/kernel/audit_watch.c @@ -53,7 +53,7 @@ static struct fsnotify_group *audit_watch_group; /* fsnotify events we care about. */ #define AUDIT_FS_WATCH (FS_MOVE | FS_CREATE | FS_DELETE | FS_DELETE_SELF |\ - FS_MOVE_SELF | FS_EVENT_ON_CHILD | FS_UNMOUNT) + FS_MOVE_SELF | FS_UNMOUNT) static void audit_free_parent(struct audit_parent *parent) { @@ -464,20 +464,17 @@ void audit_remove_watch_rule(struct audit_krule *krule) } /* Update watch data in audit rules based on fsnotify events. */ -static int audit_watch_handle_event(struct fsnotify_group *group, - struct inode *to_tell, - u32 mask, const void *data, int data_type, - const struct qstr *dname, u32 cookie, - struct fsnotify_iter_info *iter_info) +static int audit_watch_handle_event(struct fsnotify_mark *inode_mark, u32 mask, + struct inode *inode, struct inode *dir, + const struct qstr *dname) { - struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info); - const struct inode *inode = fsnotify_data_inode(data, data_type); struct audit_parent *parent; parent = container_of(inode_mark, struct audit_parent, mark); - BUG_ON(group != audit_watch_group); - WARN_ON(!inode); + if (WARN_ON_ONCE(inode_mark->group != audit_watch_group) || + WARN_ON_ONCE(!inode)) + return 0; if (mask & (FS_CREATE|FS_MOVED_TO) && inode) audit_update_watch(parent, dname, inode->i_sb->s_dev, inode->i_ino, 0); @@ -490,7 +487,7 @@ static int audit_watch_handle_event(struct fsnotify_group *group, } static const struct fsnotify_ops audit_watch_fsnotify_ops = { - .handle_event = audit_watch_handle_event, + .handle_inode_event = audit_watch_handle_event, .free_mark = audit_watch_free_mark, }; diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 94661d2d13ad..78c0837bfd7b 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -636,6 +636,19 @@ int kexec_locate_mem_hole(struct kexec_buf *kbuf) } /** + * arch_kexec_locate_mem_hole - Find free memory to place the segments. + * @kbuf: Parameters for the memory search. + * + * On success, kbuf->mem will have the start address of the memory region found. + * + * Return: 0 on success, negative errno on error. + */ +int __weak arch_kexec_locate_mem_hole(struct kexec_buf *kbuf) +{ + return kexec_locate_mem_hole(kbuf); +} + +/** * kexec_add_buffer - place a buffer in a kexec segment * @kbuf: Buffer contents and memory parameters. * @@ -647,7 +660,6 @@ int kexec_locate_mem_hole(struct kexec_buf *kbuf) */ int kexec_add_buffer(struct kexec_buf *kbuf) { - struct kexec_segment *ksegment; int ret; @@ -675,7 +687,7 @@ int kexec_add_buffer(struct kexec_buf *kbuf) kbuf->buf_align = max(kbuf->buf_align, PAGE_SIZE); /* Walk the RAM ranges and allocate a suitable range for the buffer */ - ret = kexec_locate_mem_hole(kbuf); + ret = arch_kexec_locate_mem_hole(kbuf); if (ret) return ret; diff --git a/kernel/regset.c b/kernel/regset.c new file mode 100644 index 000000000000..586823786f39 --- /dev/null +++ b/kernel/regset.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <linux/export.h> +#include <linux/slab.h> +#include <linux/regset.h> + +static int __regset_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int size, + void **data) +{ + void *p = *data, *to_free = NULL; + int res; + + if (!regset->regset_get) + return -EOPNOTSUPP; + if (size > regset->n * regset->size) + size = regset->n * regset->size; + if (!p) { + to_free = p = kzalloc(size, GFP_KERNEL); + if (!p) + return -ENOMEM; + } + res = regset->regset_get(target, regset, + (struct membuf){.p = p, .left = size}); + if (res < 0) { + kfree(to_free); + return res; + } + *data = p; + return size - res; +} + +int regset_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int size, + void *data) +{ + return __regset_get(target, regset, size, &data); +} +EXPORT_SYMBOL(regset_get); + +int regset_get_alloc(struct task_struct *target, + const struct user_regset *regset, + unsigned int size, + void **data) +{ + *data = NULL; + return __regset_get(target, regset, size, data); +} +EXPORT_SYMBOL(regset_get_alloc); + +/** + * copy_regset_to_user - fetch a thread's user_regset data into user memory + * @target: thread to be examined + * @view: &struct user_regset_view describing user thread machine state + * @setno: index in @view->regsets + * @offset: offset into the regset data, in bytes + * @size: amount of data to copy, in bytes + * @data: user-mode pointer to copy into + */ +int copy_regset_to_user(struct task_struct *target, + const struct user_regset_view *view, + unsigned int setno, + unsigned int offset, unsigned int size, + void __user *data) +{ + const struct user_regset *regset = &view->regsets[setno]; + void *buf; + int ret; + + ret = regset_get_alloc(target, regset, size, &buf); + if (ret > 0) + ret = copy_to_user(data, buf, ret) ? -EFAULT : 0; + kfree(buf); + return ret; +} diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 848f67a5f16d..b0c338ecc318 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1543,8 +1543,7 @@ static void latency_fsnotify_workfn(struct work_struct *work) { struct trace_array *tr = container_of(work, struct trace_array, fsnotify_work); - fsnotify(tr->d_max_latency->d_inode, FS_MODIFY, - tr->d_max_latency->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0); + fsnotify_inode(tr->d_max_latency->d_inode, FS_MODIFY); } static void latency_fsnotify_workfn_irq(struct irq_work *iwork) |