RDMA/core: Check that process is still alive before sending it to the users

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The PID information can disappear asynchronously because the task can be
killed and moved to zombie state. In this case, PID will be zero in
similar way to the kernel tasks. Recognize such situation where we are
asking to return orphaned object and simply skip filling PID attribute.

As part of this change, document the same scenario in counter.c code.

Link: https://lore.kernel.org/r/20191010071105.25538-3-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Leon Romanovsky 2019-10-10 10:11:05 +03:00 • committed by Jason Gunthorpe

parent cf7e93c12f

commit ac71ffcfb4

2 changed files with 33 additions and 9 deletions

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14

drivers/infiniband/core/counters.c

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28

drivers/infiniband/core/nldev.c

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