IB/rdmavt: Only put mmap_info ref if it exists

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rvt_create_qp() creates qp->ip only when a qp creation request comes from
userspace (udata is not NULL).  If we exceed the number of available
queue pairs however, the error path always attempts to put a kref to this
structure.  If the requestor is inside the kernel, this leads to a crash.

We fix this by checking that qp->ip is not NULL before caling kref_put().

Signed-off-by: Jim Foraker <foraker1@llnl.gov>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Acked-by: Jonathan Toppins <jtoppins@redhat.com>
Acked-by: Alex Estrin <alex.estrin@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

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Jim Foraker 2016-11-01 13:44:12 -07:00 • committed by Doug Ledford

parent f5eabf5e51

commit 22dccc5454

1 changed files with 2 additions and 1 deletions

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drivers/infiniband/sw/rdmavt/qp.c

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