The patch titled timerfd: add flags check has been removed from the -mm tree. Its filename was timerfd-add-flags-check.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: timerfd: add flags check From: Davide Libenzi <davidel@xxxxxxxxxxxxxxx> As requested by Michael, add a missing check for valid flags in timerfd_settime(), and make it return EINVAL in case some extra bits are set. Michael said: If this is to be any use to userland apps that want to check flag support (perhaps it is too late already), then the sooner we get it into the kernel the better: 2.6.29 would be good; earlier stables as well would be even better. [akpm@xxxxxxxxxxxxxxxxxxxx: remove unused TFD_FLAGS_SET] Acked-by: Michael Kerrisk <mtk.manpages@xxxxxxxxx> Signed-off-by: Davide Libenzi <davidel@xxxxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxx> [2.6.27.x, 2.6.28.x] Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/timerfd.c | 12 ++++++------ include/linux/timerfd.h | 16 ++++++++++++---- 2 files changed, 18 insertions(+), 10 deletions(-) diff -puN fs/timerfd.c~timerfd-add-flags-check fs/timerfd.c --- a/fs/timerfd.c~timerfd-add-flags-check +++ a/fs/timerfd.c @@ -186,10 +186,9 @@ SYSCALL_DEFINE2(timerfd_create, int, clo BUILD_BUG_ON(TFD_CLOEXEC != O_CLOEXEC); BUILD_BUG_ON(TFD_NONBLOCK != O_NONBLOCK); - if (flags & ~(TFD_CLOEXEC | TFD_NONBLOCK)) - return -EINVAL; - if (clockid != CLOCK_MONOTONIC && - clockid != CLOCK_REALTIME) + if ((flags & ~TFD_CREATE_FLAGS) || + (clockid != CLOCK_MONOTONIC && + clockid != CLOCK_REALTIME)) return -EINVAL; ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); @@ -201,7 +200,7 @@ SYSCALL_DEFINE2(timerfd_create, int, clo hrtimer_init(&ctx->tmr, clockid, HRTIMER_MODE_ABS); ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx, - flags & (O_CLOEXEC | O_NONBLOCK)); + flags & TFD_SHARED_FCNTL_FLAGS); if (ufd < 0) kfree(ctx); @@ -219,7 +218,8 @@ SYSCALL_DEFINE4(timerfd_settime, int, uf if (copy_from_user(&ktmr, utmr, sizeof(ktmr))) return -EFAULT; - if (!timespec_valid(&ktmr.it_value) || + if ((flags & ~TFD_SETTIME_FLAGS) || + !timespec_valid(&ktmr.it_value) || !timespec_valid(&ktmr.it_interval)) return -EINVAL; diff -puN include/linux/timerfd.h~timerfd-add-flags-check include/linux/timerfd.h --- a/include/linux/timerfd.h~timerfd-add-flags-check +++ a/include/linux/timerfd.h @@ -11,13 +11,21 @@ /* For O_CLOEXEC and O_NONBLOCK */ #include <linux/fcntl.h> -/* Flags for timerfd_settime. */ +/* + * CAREFUL: Check include/asm-generic/fcntl.h when defining + * new flags, since they might collide with O_* ones. We want + * to re-use O_* flags that couldn't possibly have a meaning + * from eventfd, in order to leave a free define-space for + * shared O_* flags. + */ #define TFD_TIMER_ABSTIME (1 << 0) - -/* Flags for timerfd_create. */ #define TFD_CLOEXEC O_CLOEXEC #define TFD_NONBLOCK O_NONBLOCK +#define TFD_SHARED_FCNTL_FLAGS (TFD_CLOEXEC | TFD_NONBLOCK) +/* Flags for timerfd_create. */ +#define TFD_CREATE_FLAGS TFD_SHARED_FCNTL_FLAGS +/* Flags for timerfd_settime. */ +#define TFD_SETTIME_FLAGS TFD_TIMER_ABSTIME #endif /* _LINUX_TIMERFD_H */ - _ Patches currently in -mm which might be from davidel@xxxxxxxxxxxxxxx are origin.patch linux-next.patch epoll-fix-own-poll.patch epoll-fix-epolls-own-poll-update.patch epoll-remove-debugging-code.patch eventfd-improve-support-for-semaphore-like-behavior.patch epoll-keyed-wakeups-v2-add-__wake_up_locked_key-and-__wake_up_sync_key.patch epoll-keyed-wakeups-v2-introduce-new-_poll-wakeup-macros.patch epoll-keyed-wakeups-v3-introduce-new-_poll-wakeup-macros.patch epoll-keyed-wakeups-v2-make-sockets-use-keyed-wakeups.patch epoll-keyed-wakeups-v2-make-sockets-use-keyed-wakeups-update.patch epoll-keyed-wakeups-v2-teach-epoll-about-hints-coming-with-the-wakeup-key.patch epoll-keyed-wakeups-v2-teach-epoll-about-hints-coming-with-the-wakeup-key-update.patch epoll-keyed-wakeups-v2-teach-epoll-about-hints-coming-with-the-wakeup-key-checkpatch-fixes.patch epoll-keyed-wakeups-v2-make-eventfd-use-keyed-wakeups.patch epoll-keyed-wakeups-v2-make-tty-use-keyed-wakeups.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html