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| author |   Michael J. Ruhl <michael.j.ruhl@intel.com> | 2018-11-28 10:19:36 -0800 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2018-12-06 19:50:08 -0700 |
| commit | dbc2970caef74e8ff41923d302aa6fb5a4812d0e (patch) | |
| tree | 561820fd97261741260fec6597e58c6273876395 /README | |
| parent | IB/hfi1: Limit VNIC use of SDMA engines to the available count (diff) | |
| download | linux-dev-dbc2970caef74e8ff41923d302aa6fb5a4812d0e.tar.xz linux-dev-dbc2970caef74e8ff41923d302aa6fb5a4812d0e.zip | |
IB/hfi1: Incorrect sizing of sge for PIO will OOPs
An incorrect sge sizing in the HFI PIO path will cause an OOPs similar to
this:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [] hfi1_verbs_send_pio+0x3d8/0x530 [hfi1]
PGD 0
Oops: 0000 1 SMP
Call Trace:
? hfi1_verbs_send_dma+0xad0/0xad0 [hfi1]
hfi1_verbs_send+0xdf/0x250 [hfi1]
? make_rc_ack+0xa80/0xa80 [hfi1]
hfi1_do_send+0x192/0x430 [hfi1]
hfi1_do_send_from_rvt+0x10/0x20 [hfi1]
rvt_post_send+0x369/0x820 [rdmavt]
ib_uverbs_post_send+0x317/0x570 [ib_uverbs]
ib_uverbs_write+0x26f/0x420 [ib_uverbs]
? security_file_permission+0x21/0xa0
vfs_write+0xbd/0x1e0
? mntput+0x24/0x40
SyS_write+0x7f/0xe0
system_call_fastpath+0x16/0x1b
Fix by adding the missing sizing check to correctly determine the sge
length.
Fixes: 7724105686e7 ("IB/hfi1: add driver files")
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions