@@ -577,7 +577,6 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
int add = (arg & IN_MASK_ADD);
int ret;
- /* don't allow invalid bits: we don't want flags set */
mask = inotify_arg_to_mask(arg);
fsn_mark = fsnotify_find_inode_mark(group, inode);
@@ -628,7 +627,6 @@ static int inotify_new_watch(struct fsnotify_group *group,
struct idr *idr = &group->inotify_data.idr;
spinlock_t *idr_lock = &group->inotify_data.idr_lock;
- /* don't allow invalid bits: we don't want flags set */
mask = inotify_arg_to_mask(arg);
tmp_i_mark = kmem_cache_alloc(inotify_inode_mark_cachep, GFP_KERNEL);
@@ -757,6 +755,10 @@ SYSCALL_DEFINE3(inotify_add_watch, int, fd, const char __user *, pathname,
int ret, fput_needed;
unsigned flags = 0;
+ /* don't allow invalid bits: we don't want flags set */
+ if (unlikely(!(mask & ALL_INOTIFY_BITS)))
+ return -EINVAL;
+
filp = fget_light(fd, &fput_needed);
if (unlikely(!filp))
return -EBADF;
This is a note to let you know that I have just added a patch titled inotify: invalid mask should return a error number but not to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 125abfffbaf2c2a208417fe8f332c4b31733346e Mon Sep 17 00:00:00 2001 From: Zhao Hongjiang <zhaohongjiang@huawei.com> Date: Tue, 30 Apr 2013 15:26:46 -0700 Subject: [PATCH] inotify: invalid mask should return a error number but not set it commit 04df32fa10ab9a6f0643db2949d42efc966bc844 upstream. When we run the crackerjack testsuite, the inotify_add_watch test is stalled. This is caused by the invalid mask 0 - the task is waiting for the event but it never comes. inotify_add_watch() should return -EINVAL as it did before commit 676a0675cf92 ("inotify: remove broken mask checks causing unmount to be EINVAL"). That commit removes the invalid mask check, but that check is needed. Check the mask's ALL_INOTIFY_BITS before the inotify_arg_to_mask() call. If none are set, just return -EINVAL. Because IN_UNMOUNT is in ALL_INOTIFY_BITS, this change will not trigger the problem that above commit fixed. [akpm@linux-foundation.org: fix build] Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com> Acked-by: Jim Somerville <Jim.Somerville@windriver.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Eric Paris <eparis@parisplace.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [ luis: adjust context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- fs/notify/inotify/inotify_user.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) -- 1.8.1.2