diff options
| author | Amir Goldstein | 2022-02-23 17:14:37 +0200 |
|---|---|---|
| committer | Jan Kara | 2022-02-24 14:04:51 +0100 |
| commit | 4f0b903ded728c505850daf2914bfc08841f0ae6 (patch) | |
| tree | 2d9d04addb7cdc156b2f7c151cfeb22f7f5d11a0 /fs/notify/fanotify | |
| parent | dfd42facf1e4ada021b939b4e19c935dcdd55566 (diff) | |
fsnotify: fix merge with parent's ignored mask
fsnotify_parent() does not consider the parent's mark at all unless
the parent inode shows interest in events on children and in the
specific event.
So unless parent added an event to both its mark mask and ignored mask,
the event will not be ignored.
Fix this by declaring the interest of an object in an event when the
event is in either a mark mask or ignored mask.
Link: https://lore.kernel.org/r/20220223151438.790268-2-amir73il@gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify/fanotify')
| -rw-r--r-- | fs/notify/fanotify/fanotify_user.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 2ff6bd85ba8f..bd99430a128d 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -1003,17 +1003,18 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark, __u32 mask, unsigned int flags, __u32 umask, int *destroy) { - __u32 oldmask = 0; + __u32 oldmask, newmask; /* umask bits cannot be removed by user */ mask &= ~umask; spin_lock(&fsn_mark->lock); + oldmask = fsnotify_calc_mask(fsn_mark); if (!(flags & FAN_MARK_IGNORED_MASK)) { - oldmask = fsn_mark->mask; fsn_mark->mask &= ~mask; } else { fsn_mark->ignored_mask &= ~mask; } + newmask = fsnotify_calc_mask(fsn_mark); /* * We need to keep the mark around even if remaining mask cannot * result in any events (e.g. mask == FAN_ONDIR) to support incremenal @@ -1023,7 +1024,7 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark, *destroy = !((fsn_mark->mask | fsn_mark->ignored_mask) & ~umask); spin_unlock(&fsn_mark->lock); - return mask & oldmask; + return oldmask & ~newmask; } static int fanotify_remove_mark(struct fsnotify_group *group, @@ -1081,23 +1082,23 @@ static int fanotify_remove_inode_mark(struct fsnotify_group *group, } static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark, - __u32 mask, - unsigned int flags) + __u32 mask, unsigned int flags) { - __u32 oldmask = -1; + __u32 oldmask, newmask; spin_lock(&fsn_mark->lock); + oldmask = fsnotify_calc_mask(fsn_mark); if (!(flags & FAN_MARK_IGNORED_MASK)) { - oldmask = fsn_mark->mask; fsn_mark->mask |= mask; } else { fsn_mark->ignored_mask |= mask; if (flags & FAN_MARK_IGNORED_SURV_MODIFY) fsn_mark->flags |= FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY; } + newmask = fsnotify_calc_mask(fsn_mark); spin_unlock(&fsn_mark->lock); - return mask & ~oldmask; + return newmask & ~oldmask; } static struct fsnotify_mark *fanotify_add_new_mark(struct fsnotify_group *group, |