linux-toradex.git/drivers/infiniband/core/verbs.c, branch v6.10

RDMA/core: Fix uninit-value access in ib_get_eth_speed()

2023-11-13T08:19:07+00:00

KMSAN reported the following uninit-value access issue:

lo speed is unknown, defaulting to 1000
=====================================================
BUG: KMSAN: uninit-value in ib_get_width_and_speed drivers/infiniband/core/verbs.c:1889 [inline]
BUG: KMSAN: uninit-value in ib_get_eth_speed+0x546/0xaf0 drivers/infiniband/core/verbs.c:1998
 ib_get_width_and_speed drivers/infiniband/core/verbs.c:1889 [inline]
 ib_get_eth_speed+0x546/0xaf0 drivers/infiniband/core/verbs.c:1998
 siw_query_port drivers/infiniband/sw/siw/siw_verbs.c:173 [inline]
 siw_get_port_immutable+0x6f/0x120 drivers/infiniband/sw/siw/siw_verbs.c:203
 setup_port_data drivers/infiniband/core/device.c:848 [inline]
 setup_device drivers/infiniband/core/device.c:1244 [inline]
 ib_register_device+0x1589/0x1df0 drivers/infiniband/core/device.c:1383
 siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline]
 siw_newlink+0x129e/0x13d0 drivers/infiniband/sw/siw/siw_main.c:490
 nldev_newlink+0x8fd/0xa60 drivers/infiniband/core/nldev.c:1763
 rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
 rdma_nl_rcv+0xe8a/0x1120 drivers/infiniband/core/netlink.c:259
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0xf4b/0x1230 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x1242/0x1420 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x997/0xd60 net/socket.c:2588
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2642
 __sys_sendmsg net/socket.c:2671 [inline]
 __do_sys_sendmsg net/socket.c:2680 [inline]
 __se_sys_sendmsg net/socket.c:2678 [inline]
 __x64_sys_sendmsg+0x2fa/0x4a0 net/socket.c:2678
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Local variable lksettings created at:
 ib_get_eth_speed+0x4b/0xaf0 drivers/infiniband/core/verbs.c:1974
 siw_query_port drivers/infiniband/sw/siw/siw_verbs.c:173 [inline]
 siw_get_port_immutable+0x6f/0x120 drivers/infiniband/sw/siw/siw_verbs.c:203

CPU: 0 PID: 11257 Comm: syz-executor.1 Not tainted 6.6.0-14500-g1c41041124bd #10
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc38 04/01/2014
=====================================================

If __ethtool_get_link_ksettings() fails, `netdev_speed` is set to the
default value, SPEED_1000. In this case, if `lanes` field of struct
ethtool_link_ksettings is not initialized, an uninitialized value is passed
to ib_get_width_and_speed(). This causes the above issue. This patch
resolves the issue by initializing `lanes` to 0.

Fixes: cb06b6b3f6cb ("RDMA/core: Get IB width and speed from netdev")
Signed-off-by: Shigeru Yoshida 
Link: https://lore.kernel.org/r/20231108143113.1360567-1-syoshida@redhat.com
Signed-off-by: Leon Romanovsky

IB/core: Add support for XDR link speed

2023-09-26T09:38:39+00:00

Add new IBTA speed XDR, the new rate that was added to Infiniband spec
as part of XDR and supporting signaling rate of 200Gb.

In order to report that value to rdma-core, add new u32 field to
query_port response.

Signed-off-by: Or Har-Toov 
Reviewed-by: Mark Zhang 
Link: https://lore.kernel.org/r/9d235fc600a999e8274010f0e18b40fa60540e6c.1695204156.git.leon@kernel.org
Reviewed-by: Jacob Keller 
Signed-off-by: Leon Romanovsky

RDMA/core: Fix repeated words in comments

2023-09-11T11:14:59+00:00

Corrected the repeated words in the documentation of
rdma_replace_ah_attr() and ib_resolve_unicast_gid_dmac()
functions.

Signed-off-by: Rohit Chavan 
Link: https://lore.kernel.org/r/20230824081304.408-1-roheetchavan@gmail.com
Signed-off-by: Leon Romanovsky

IB/core: Add more speed parsing in ib_get_width_and_speed()

2023-08-13T07:41:57+00:00

When the Ethernet driver does not provide the number of lanes
in the __ethtool_get_link_ksettings() response, the function
ib_get_width_and_speed() does not take consideration of 50G,
100G and 200G speeds while calculating the IB width and speed.
Update the width and speed for the above netdev speeds.

Signed-off-by: Kalesh AP 
Signed-off-by: Selvin Xavier 
Link: https://lore.kernel.org/r/1690966823-8159-1-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky

RDMA/core: Get IB width and speed from netdev

2023-07-30T11:55:37+00:00

Previously, there was no way to query the number of lanes for a network
card, so the same netdev_speed would result in a fixed pair of width and
speed. As network card specifications become more diverse, such fixed
mode is no longer suitable, so a method is needed to obtain the correct
width and speed based on the number of lanes.

This patch retrieves netdev lanes and speed from net_device and
translates them to IB width and speed.

Signed-off-by: Haoyue Xu 
Signed-off-by: Luoyouming 
Signed-off-by: Junxian Huang 
Link: https://lore.kernel.org/r/20230721092052.2090449-1-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky

RDMA/core: Fix GID entry ref leak when create_ah fails

2023-04-13T15:17:32+00:00

If AH create request fails, release sgid_attr to avoid GID entry
referrence leak reported while releasing GID table

Fixes: 1a1f460ff151 ("RDMA: Hold the sgid_attr inside the struct ib_ah/qp")
Link: https://lore.kernel.org/r/20230401063424.342204-1-saravanan.vajravel@broadcom.com
Reviewed-by: Selvin Xavier 
Signed-off-by: Saravanan Vajravel 
Signed-off-by: Jason Gunthorpe

RDMA/core: Fix ib block iterator counter overflow

2023-01-10T10:21:39+00:00

When registering a new DMA MR after selecting the best aligned page size
for it, we iterate over the given sglist to split each entry to smaller,
aligned to the selected page size, DMA blocks.

In given circumstances where the sg entry and page size fit certain
sizes and the sg entry is not aligned to the selected page size, the
total size of the aligned pages we need to cover the sg entry is >= 4GB.
Under this circumstances, while iterating page aligned blocks, the
counter responsible for counting how much we advanced from the start of
the sg entry is overflowed because its type is u32 and we pass 4GB in
size. This can lead to an infinite loop inside the iterator function
because the overflow prevents the counter to be larger
than the size of the sg entry.

Fix the presented problem by changing the advancement condition to
eliminate overflow.

Backtrace:
[  192.374329] efa_reg_user_mr_dmabuf
[  192.376783] efa_register_mr
[  192.382579] pgsz_bitmap 0xfffff000 rounddown 0x80000000
[  192.386423] pg_sz [0x80000000] umem_length[0xc0000000]
[  192.392657] start 0x0 length 0xc0000000 params.page_shift 31 params.page_num 3
[  192.399559] hp_cnt[3], pages_in_hp[524288]
[  192.403690] umem->sgt_append.sgt.nents[1]
[  192.407905] number entries: [1], pg_bit: [31]
[  192.411397] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]
[  192.415601] biter->__sg_advance [665837568] sg_dma_len[3221225472]
[  192.419823] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]
[  192.423976] biter->__sg_advance [2813321216] sg_dma_len[3221225472]
[  192.428243] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]
[  192.432397] biter->__sg_advance [665837568] sg_dma_len[3221225472]

Fixes: a808273a495c ("RDMA/verbs: Add a DMA iterator to return aligned contiguous memory blocks")
Signed-off-by: Yonatan Nachum 
Link: https://lore.kernel.org/r/20230109133711.13678-1-ynachum@amazon.com
Signed-off-by: Leon Romanovsky

RDMA/core: Clean up a variable name in ib_create_srq_user()

2022-09-22T11:31:05+00:00

"&srq->pd->usecnt" and "&pd->usecnt" are different names for the same
reference count.  Use "&pd->usecnt" consistently for both the increment
and decrement.

Signed-off-by: Dan Carpenter 
Link: https://lore.kernel.org/r/YyxFe3Pm0uzRuBkQ@kili
Signed-off-by: Leon Romanovsky

IB: Set IOVA/LENGTH on IB_MR in core/uverbs layers

2022-09-22T09:46:39+00:00

Set 'iova' and 'length' on ib_mr in ib_uverbs and ib_core layers to let all
drivers have the members filled. Also, this commit removes redundancy in
the respective drivers.

Previously, commit 04c0a5fcfcf65 ("IB/uverbs: Set IOVA on IB MR in uverbs
layer") changed to set 'iova', but seems to have missed 'length' and the
ib_core layer at that time.

Fixes: 04c0a5fcfcf65 ("IB/uverbs: Set IOVA on IB MR in uverbs layer")
Signed-off-by: Daisuke Matsuda 
Link: https://lore.kernel.org/r/20220921080844.1616883-1-matsuda-daisuke@fujitsu.com
Signed-off-by: Leon Romanovsky

RDMA: Split kernel-only global device caps from uverbs device caps

2022-04-06T18:02:13+00:00

Split out flags from ib_device::device_cap_flags that are only used
internally to the kernel into kernel_cap_flags that is not part of the
uapi. This limits the device_cap_flags to being the same bitmap that will
be copied to userspace.

This cleanly splits out the uverbs flags from the kernel flags to avoid
confusion in the flags bitmap.

Add some short comments describing which each of the kernel flags is
connected to. Remove unused kernel flags.

Link: https://lore.kernel.org/r/0-v2-22c19e565eef+139a-kern_caps_jgg@nvidia.com
Reviewed-by: Christoph Hellwig 
Reviewed-by: Max Gurtovoy 
Signed-off-by: Jason Gunthorpe