IB/mlx5: Serialize access to the VMA list

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commit ad9a3668a4 upstream.

User-space applications can do mmap and munmap directly at
any time.

Since the VMA list is not protected with a mutex, concurrent
accesses to the VMA list from the mmap and munmap can cause
data corruption. Add a mutex around the list.

Fixes: 7c2344c3bb ("IB/mlx5: Implements disassociate_ucontext API")
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Majd Dibbiny 2017-12-24 13:54:56 +02:00 • committed by Greg Kroah-Hartman

parent 907145e68e

commit d471542b9f

2 changed files with 12 additions and 0 deletions

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8

drivers/infiniband/hw/mlx5/main.c

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4

drivers/infiniband/hw/mlx5/mlx5_ib.h

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