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| author |   Douglas Miller <doug.miller@cornelisnetworks.com> | 2022-05-20 14:37:06 -0400 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2022-05-24 15:08:31 -0300 |
| commit | 629e052d0c98e46dde9f0824f0aa437f678d9b8f (patch) | |
| tree | 016ccefe56e365dbd50c652f4bd53ae5831d89f3 /sound | |
| parent | RDMA/hfi1: Prevent use of lock before it is initialized (diff) | |
| download | linux-dev-629e052d0c98e46dde9f0824f0aa437f678d9b8f.tar.xz linux-dev-629e052d0c98e46dde9f0824f0aa437f678d9b8f.zip | |
RDMA/hfi1: Prevent panic when SDMA is disabled
If the hfi1 module is loaded with HFI1_CAP_SDMA off, a call to
hfi1_write_iter() will dereference a NULL pointer and panic. A typical
stack frame is:
sdma_select_user_engine [hfi1]
hfi1_user_sdma_process_request [hfi1]
hfi1_write_iter [hfi1]
do_iter_readv_writev
do_iter_write
vfs_writev
do_writev
do_syscall_64
The fix is to test for SDMA in hfi1_write_iter() and fail the I/O with
EINVAL.
Link: https://lore.kernel.org/r/20220520183706.48973.79803.stgit@awfm-01.cornelisnetworks.com
Signed-off-by: Douglas Miller <doug.miller@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions