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fsnotify: preserve 64-bit pre-content ranges

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vfs_fallocate() and remap_verify_area() pass 64-bit lengths to
fsnotify_file_area_perm(), which truncates them to size_t on
32-bit systems.

Use 64 bit (unsigned) types throughout the entire pre-content
notification chain to keep the full range. The userspace range
field is already 64-bits.

Fixes: 9740d17162 ("fsnotify: pass optional file access range in pre-content event")
Signed-off-by: Avi Weiss <thnkslprpt@gmail.com>
Link: https://patch.msgid.link/20261015175701.3674449-1-thnkslprpt@gmail.com
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Avi Weiss 2026-10-15 20:57:01 +03:00 committed by Jan Kara
parent 6b4b543fa1
commit 1dcf2be94b
4 changed files with 7 additions and 7 deletions
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2
fs/notify/fanotify/fanotify.h
View File

@ -444,7 +444,7 @@ struct fanotify_perm_event {
struct fanotify_event fae;
struct path path;
loff_t pos; /* FANOTIFY_NO_RANGE if unavailable */
size_t count;
u64 count;
u32 response; /* userspace answer to the event */
unsigned short state; /* state of the event */
unsigned short watchdog_cnt; /* already scanned by watchdog? */

2
fs/notify/fsnotify.c
View File

@ -157,7 +157,7 @@ static inline __u32 fsnotify_object_watched(struct inode *inode, __u32 mnt_mask,
/* Report pre-content event with optional range info */
int fsnotify_pre_content(const struct path *path, const loff_t *ppos,
size_t count)
u64 count)
{
struct file_range range;

4
include/linux/fsnotify.h
View File

@ -135,7 +135,7 @@ int fsnotify_open_perm_and_set_mode(struct file *file);
* fsnotify_file_area_perm - permission hook before access to file range
*/
static inline int fsnotify_file_area_perm(struct file *file, int perm_mask,
const loff_t *ppos, size_t count)
const loff_t *ppos, u64 count)
{
/*
* filesystem may be modified in the context of permission events
@ -213,7 +213,7 @@ static inline int fsnotify_open_perm_and_set_mode(struct file *file)
}
static inline int fsnotify_file_area_perm(struct file *file, int perm_mask,
const loff_t *ppos, size_t count)
const loff_t *ppos, u64 count)
{
return 0;
}

6
include/linux/fsnotify_backend.h
View File

@ -323,7 +323,7 @@ struct fs_error_report {
struct file_range {
const struct path *path;
loff_t pos;
size_t count;
u64 count;
};
static inline const struct path *file_range_path(const struct file_range *range)
@ -946,12 +946,12 @@ static inline void fsnotify_init_event(struct fsnotify_event *event)
INIT_LIST_HEAD(&event->list);
}
int fsnotify_pre_content(const struct path *path, const loff_t *ppos,
size_t count);
u64 count);
#else
static inline int fsnotify_pre_content(const struct path *path,
const loff_t *ppos, size_t count)
const loff_t *ppos, u64 count)
{
return 0;
}