[Bug 191593] [fcntl] F_SETLK returns EDEADLK when it shouldn't -

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191593

Jilles Tjoelker <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
            Summary|[fcntl] F_SETLK returns     |[fcntl] F_SETLK returns
                   |EDEADLK when it shouldn't - |EDEADLK when it shouldn't -
                   |only F_SETFLW and waiting   |only F_SETLKW and waiting
                   |should return EDEADLK       |should return EDEADLK

--- Comment #3 from Jilles Tjoelker <[e-mail]> ---
You are right that fcntl(F_SETLK) should not fail with [EDEADLK]; this error is
only defined for fcntl(F_SETLKW). A non-blocking locking attempt cannot
deadlock.

The proposed patch looks wrong, though. The above if ((lock->lf_flags & F_WAIT)
== 0 && lock->lf_async_task == NULL) should already catch this case. Perhaps
lf_async_task is set incorrectly?

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