mirror of
https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
synced 2025-09-14 00:29:50 +10:00
98b6fa62c8
Since the buffers are mapped from userspace, it is prudent to use
READ_ONCE() to read the value into a local variable, and use that for
any other actions taken. Having a stable read of the buffer length
avoids worrying about it changing after checking, or being read multiple
times.
Similarly, the buffer may well change in between it being picked and
being committed. Ensure the looping for incremental ring buffer commit
stops if it hits a zero sized buffer, as no further progress can be made
at that point.
Fixes:
|
||
|---|---|---|
| .. | ||
| advise.c | ||
| advise.h | ||
| alloc_cache.c | ||
| alloc_cache.h | ||
| cancel.c | ||
| cancel.h | ||
| cmd_net.c | ||
| epoll.c | ||
| epoll.h | ||
| eventfd.c | ||
| eventfd.h | ||
| fdinfo.c | ||
| fdinfo.h | ||
| filetable.c | ||
| filetable.h | ||
| fs.c | ||
| fs.h | ||
| futex.c | ||
| futex.h | ||
| io_uring.c | ||
| io_uring.h | ||
| io-wq.c | ||
| io-wq.h | ||
| kbuf.c | ||
| kbuf.h | ||
| Kconfig | ||
| Makefile | ||
| memmap.c | ||
| memmap.h | ||
| mock_file.c | ||
| msg_ring.c | ||
| msg_ring.h | ||
| napi.c | ||
| napi.h | ||
| net.c | ||
| net.h | ||
| nop.c | ||
| nop.h | ||
| notif.c | ||
| notif.h | ||
| opdef.c | ||
| opdef.h | ||
| openclose.c | ||
| openclose.h | ||
| poll.c | ||
| poll.h | ||
| refs.h | ||
| register.c | ||
| register.h | ||
| rsrc.c | ||
| rsrc.h | ||
| rw.c | ||
| rw.h | ||
| slist.h | ||
| splice.c | ||
| splice.h | ||
| sqpoll.c | ||
| sqpoll.h | ||
| statx.c | ||
| statx.h | ||
| sync.c | ||
| sync.h | ||
| tctx.c | ||
| tctx.h | ||
| timeout.c | ||
| timeout.h | ||
| truncate.c | ||
| truncate.h | ||
| uring_cmd.c | ||
| uring_cmd.h | ||
| waitid.c | ||
| waitid.h | ||
| xattr.c | ||
| xattr.h | ||
| zcrx.c | ||
| zcrx.h | ||