The patch titled Subject: inotify: invalid mask should return a error number but not set it has been added to the -mm tree. Its filename is inotify-invalid-mask-should-return-a-error-number-but-not-set-it.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Zhao Hongjiang <zhaohongjiang@xxxxxxxxxx> Subject: inotify: invalid mask should return a error number but not set it 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 676a0675cf9200 ("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. Signed-off-by: Zhao Hongjiang <zhaohongjiang@xxxxxxxxxx> Acked-by: Jim Somerville <Jim.Somerville@xxxxxxxxxxxxx> Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx> Cc: Jerome Marchand <jmarchan@xxxxxxxxxx> Cc: Eric Paris <eparis@xxxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/notify/inotify/inotify_user.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff -puN fs/notify/inotify/inotify_user.c~inotify-invalid-mask-should-return-a-error-number-but-not-set-it fs/notify/inotify/inotify_user.c --- a/fs/notify/inotify/inotify_user.c~inotify-invalid-mask-should-return-a-error-number-but-not-set-it +++ a/fs/notify/inotify/inotify_user.c @@ -572,7 +572,6 @@ static int inotify_update_existing_watch 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); @@ -623,7 +622,6 @@ static int inotify_new_watch(struct fsno 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); @@ -751,6 +749,10 @@ SYSCALL_DEFINE3(inotify_add_watch, int, int ret; unsigned flags = 0; + /* don't allow invalid bits: we don't want flags set */ + if (unlikely(!(arg & ALL_INOTIFY_BITS))) + return -EINVAL; + f = fdget(fd); if (unlikely(!f.file)) return -EBADF; _ Patches currently in -mm which might be from zhaohongjiang@xxxxxxxxxx are inotify-invalid-mask-should-return-a-error-number-but-not-set-it.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html