From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Douglas Miller <doug.miller@cornelisnetworks.com>,
Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>,
Jason Gunthorpe <jgg@nvidia.com>, Sasha Levin <sashal@kernel.org>,
linux-rdma@vger.kernel.org
Subject: [PATCH AUTOSEL 5.10 25/26] RDMA/hfi1: Prevent panic when SDMA is disabled
Date: Wed, 1 Jun 2022 09:57:58 -0400 [thread overview]
Message-ID: <20220601135759.2004435-25-sashal@kernel.org> (raw)
In-Reply-To: <20220601135759.2004435-1-sashal@kernel.org>
From: Douglas Miller <doug.miller@cornelisnetworks.com>
[ Upstream commit 629e052d0c98e46dde9f0824f0aa437f678d9b8f ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/hw/hfi1/file_ops.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/infiniband/hw/hfi1/file_ops.c b/drivers/infiniband/hw/hfi1/file_ops.c
index 329ee4f48d95..cfc2110fc38a 100644
--- a/drivers/infiniband/hw/hfi1/file_ops.c
+++ b/drivers/infiniband/hw/hfi1/file_ops.c
@@ -306,6 +306,8 @@ static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from)
unsigned long dim = from->nr_segs;
int idx;
+ if (!HFI1_CAP_IS_KSET(SDMA))
+ return -EINVAL;
idx = srcu_read_lock(&fd->pq_srcu);
pq = srcu_dereference(fd->pq, &fd->pq_srcu);
if (!cq || !pq) {
--
2.35.1
next prev parent reply other threads:[~2022-06-01 14:06 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-01 13:57 [PATCH AUTOSEL 5.10 01/26] IB/rdmavt: add missing locks in rvt_ruc_loopback Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 02/26] ARM: dts: ox820: align interrupt controller node name with dtschema Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 03/26] ARM: dts: s5pv210: align DMA channels " Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 04/26] arm64: dts: qcom: msm8994: Fix BLSP[12]_DMA channels count Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 05/26] PM / devfreq: rk3399_dmc: Disable edev on remove() Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 06/26] crypto: ccree - use fine grained DMA mapping dir Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 07/26] soc: ti: ti_sci_pm_domains: Check for null return of devm_kcalloc Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 08/26] fs: jfs: fix possible NULL pointer dereference in dbFree() Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 09/26] arm64: Expand ESR_ELx_WFx_ISS_TI to match its ARMv8.7 definition Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 10/26] ARM: OMAP1: clock: Fix UART rate reporting algorithm Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 11/26] selftests/resctrl: Change the default limited time to 120 seconds Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 12/26] powerpc/fadump: Fix fadump to work with a different endian capture kernel Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 13/26] fat: add ratelimit to fat*_ent_bread() Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 14/26] pinctrl: renesas: rzn1: Fix possible null-ptr-deref in sh_pfc_map_resources() Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 15/26] ARM: versatile: Add missing of_node_put in dcscb_init Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 16/26] ARM: dts: exynos: add atmel,24c128 fallback to Samsung EEPROM Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 17/26] ARM: hisi: Add missing of_node_put after of_find_compatible_node Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 18/26] PCI: Avoid pci_dev_lock() AB/BA deadlock with sriov_numvfs_store() Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 19/26] tracing: incorrect isolate_mote_t cast in mm_vmscan_lru_isolate Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 20/26] powerpc/powernv/vas: Assign real address to rx_fifo in vas_rx_win_attr Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 21/26] powerpc/xics: fix refcount leak in icp_opal_init() Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 22/26] powerpc/powernv: fix missing of_node_put in uv_init() Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 23/26] macintosh/via-pmu: Fix build failure when CONFIG_INPUT is disabled Sasha Levin
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 24/26] powerpc/iommu: Add missing of_node_put in iommu_init_early_dart Sasha Levin
2022-06-01 13:57 ` Sasha Levin [this message]
2022-06-01 13:57 ` [PATCH AUTOSEL 5.10 26/26] drm: fix EDID struct for old ARM OABI format Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220601135759.2004435-25-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=dennis.dalessandro@cornelisnetworks.com \
--cc=doug.miller@cornelisnetworks.com \
--cc=jgg@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox