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authorAmir Goldstein <amir73il@gmail.com>2020-07-16 11:42:13 +0300
committerJan Kara <jack@suse.cz>2020-07-27 22:23:36 +0300
commit3ef866536645ce1b4f0516e8723d803d0fa6ca26 (patch)
treebc0ee83c41a2749dd5fc14461049ad2ec659a8c6 /fs/notify
parentd809daf1b6add51eec001bf60b17885d697a299d (diff)
downloadlinux-3ef866536645ce1b4f0516e8723d803d0fa6ca26.tar.xz
fanotify: mask out special event flags from ignored mask
The special event flags (FAN_ONDIR, FAN_EVENT_ON_CHILD) never had any meaning in ignored mask. Mask them out explicitly. Link: https://lore.kernel.org/r/20200716084230.30611-6-amir73il@gmail.com Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fanotify/fanotify_user.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 1e04caf8d6ba..6d30beb320f3 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -1040,6 +1040,7 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
__kernel_fsid_t __fsid, *fsid = NULL;
u32 valid_mask = FANOTIFY_EVENTS | FANOTIFY_EVENT_FLAGS;
unsigned int mark_type = flags & FANOTIFY_MARK_TYPE_BITS;
+ bool ignored = flags & FAN_MARK_IGNORED_MASK;
unsigned int obj_type, fid_mode;
int ret;
@@ -1087,6 +1088,10 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
if (mask & ~valid_mask)
return -EINVAL;
+ /* Event flags (ONDIR, ON_CHILD) are meaningless in ignored mask */
+ if (ignored)
+ mask &= ~FANOTIFY_EVENT_FLAGS;
+
f = fdget(fanotify_fd);
if (unlikely(!f.file))
return -EBADF;