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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-12-10 14:15:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-12-10 14:15:39 -0800 |
| commit | 0d21e6684779493d90f3dee90d4457d5b4aed8ad (patch) | |
| tree | 8b4beb5cc8d10ecdd64cd16d653891349aa2c946 /include/uapi/asm-generic/poll.h | |
| parent | Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm (diff) | |
| parent | aio: Fix incorrect usage of eventfd_signal_allowed() (diff) | |
| download | linux-dev-0d21e6684779493d90f3dee90d4457d5b4aed8ad.tar.xz linux-dev-0d21e6684779493d90f3dee90d4457d5b4aed8ad.zip | |
Merge tag 'aio-poll-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux
Pull aio poll fixes from Eric Biggers:
"Fix three bugs in aio poll, and one issue with POLLFREE more broadly:
- aio poll didn't handle POLLFREE, causing a use-after-free.
- aio poll could block while the file is ready.
- aio poll called eventfd_signal() when it isn't allowed.
- POLLFREE didn't handle multiple exclusive waiters correctly.
This has been tested with the libaio test suite, as well as with test
programs I wrote that reproduce the first two bugs. I am sending this
pull request myself as no one seems to be maintaining this code"
* tag 'aio-poll-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux:
aio: Fix incorrect usage of eventfd_signal_allowed()
aio: fix use-after-free due to missing POLLFREE handling
aio: keep poll requests on waitqueue until completed
signalfd: use wake_up_pollfree()
binder: use wake_up_pollfree()
wait: add wake_up_pollfree()
Diffstat (limited to 'include/uapi/asm-generic/poll.h')
| -rw-r--r-- | include/uapi/asm-generic/poll.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/uapi/asm-generic/poll.h b/include/uapi/asm-generic/poll.h index 41b509f410bf..f9c520ce4bf4 100644 --- a/include/uapi/asm-generic/poll.h +++ b/include/uapi/asm-generic/poll.h @@ -29,7 +29,7 @@ #define POLLRDHUP 0x2000 #endif -#define POLLFREE (__force __poll_t)0x4000 /* currently only for epoll */ +#define POLLFREE (__force __poll_t)0x4000 #define POLL_BUSY_LOOP (__force __poll_t)0x8000 |