pipe: Check for ring full inside of the spinlock in pipe_write()

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Make pipe_write() check to see if the ring has become full between it
taking the pipe mutex, checking the ring status and then taking the
spinlock.

This can happen if a notification is written into the pipe as that happens
without the pipe mutex.

Signed-off-by: David Howells <dhowells@redhat.com>

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David Howells 2019-10-07 16:30:51 +01:00

parent 7e25a73f1a

commit 8df441294d

1 changed files with 5 additions and 0 deletions

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fs/pipe.c

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