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io_uring: fix missing sigmask restore in io_cqring_wait()

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Move get_timespec() section in io_cqring_wait() before the sigmask
saving, otherwise we'll fail to restore sigmask once get_timespec()
returns error.

Fixes: c73ebb685fb6 ("io_uring: add timeout support for io_uring_enter()")
Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20210914143852.9663-1-xiaoguang.wang@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Xiaoguang Wang 2021-09-14 22:38:52 +08:00 committed by Jens Axboe
parent 41d3a6bd1d
commit 44df58d441
1 changed files with 8 additions and 8 deletions
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16
fs/io_uring.c
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@ -7518,6 +7518,14 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
break;
} while (1);
if (uts) {
struct timespec64 ts;
if (get_timespec64(&ts, uts))
return -EFAULT;
timeout = timespec64_to_jiffies(&ts);
}
if (sig) {
#ifdef CONFIG_COMPAT
if (in_compat_syscall())
@ -7531,14 +7539,6 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
return ret;
}
if (uts) {
struct timespec64 ts;
if (get_timespec64(&ts, uts))
return -EFAULT;
timeout = timespec64_to_jiffies(&ts);
}
init_waitqueue_func_entry(&iowq.wq, io_wake_function);
iowq.wq.private = current;
INIT_LIST_HEAD(&iowq.wq.entry);