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| author | Jia-Ju Bai <baijiaju1990@163.com> | 2017-06-05 15:23:40 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-06-14 20:02:01 +0300 |
| commit | 07d432bb97f19dd5e784175152f9fce3b2646133 (patch) | |
| tree | f7467081cde8500b5746a39cd8692f95532b22f0 /drivers/infiniband/sw/rdmavt/trace.c | |
| parent | e57bb6be5e095351086d3e6de9853a0763342535 (diff) | |
| download | linux-07d432bb97f19dd5e784175152f9fce3b2646133.tar.xz | |
rxe: Fix a sleep-in-atomic bug in post_one_send
The driver may sleep under a spin lock, and the function call path is:
post_one_send (acquire the lock by spin_lock_irqsave)
init_send_wqe
copy_from_user --> may sleep
There is no flow that makes "qp->is_user" true, and copy_from_user may
cause bug when a non-user pointer is used. So the lines of copy_from_user
and check of "qp->is_user" are removed.
Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/sw/rdmavt/trace.c')
0 files changed, 0 insertions, 0 deletions