kernel.git/net/rds/ib.c, branch linux-4.14.y

net/rds: Fix error handling in rds_ib_add_one()

2019-10-07T16:55:20Z

[ Upstream commit d64bf89a75b65f83f06be9fb8f978e60d53752db ] rds_ibdev:ipaddr_list and rds_ibdev:conn_list are initialized after allocation some resources such as protection domain. If allocation of such resources fail, then these uninitialized variables are accessed in rds_ib_dev_free() in failure path. This can potentially crash the system. The code has been updated to initialize these variables very early in the function. Signed-off-by: Dotan Barak Signed-off-by: Sudhakar Dindukurti Acked-by: Santosh Shilimkar Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

RDS: IB: Fix null pointer issue

2018-04-26T09:02:17Z

[ Upstream commit 2c0aa08631b86a4678dbc93b9caa5248014b4458 ] Scenario: 1. Port down and do fail over 2. Ap do rds_bind syscall PID: 47039 TASK: ffff89887e2fe640 CPU: 47 COMMAND: "kworker/u:6" #0 [ffff898e35f159f0] machine_kexec at ffffffff8103abf9 #1 [ffff898e35f15a60] crash_kexec at ffffffff810b96e3 #2 [ffff898e35f15b30] oops_end at ffffffff8150f518 #3 [ffff898e35f15b60] no_context at ffffffff8104854c #4 [ffff898e35f15ba0] __bad_area_nosemaphore at ffffffff81048675 #5 [ffff898e35f15bf0] bad_area_nosemaphore at ffffffff810487d3 #6 [ffff898e35f15c00] do_page_fault at ffffffff815120b8 #7 [ffff898e35f15d10] page_fault at ffffffff8150ea95 [exception RIP: unknown or invalid address] RIP: 0000000000000000 RSP: ffff898e35f15dc8 RFLAGS: 00010282 RAX: 00000000fffffffe RBX: ffff889b77f6fc00 RCX:ffffffff81c99d88 RDX: 0000000000000000 RSI: ffff896019ee08e8 RDI:ffff889b77f6fc00 RBP: ffff898e35f15df0 R8: ffff896019ee08c8 R9:0000000000000000 R10: 0000000000000400 R11: 0000000000000000 R12:ffff896019ee08c0 R13: ffff889b77f6fe68 R14: ffffffff81c99d80 R15: ffffffffa022a1e0 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #8 [ffff898e35f15dc8] cma_ndev_work_handler at ffffffffa022a228 [rdma_cm] #9 [ffff898e35f15df8] process_one_work at ffffffff8108a7c6 #10 [ffff898e35f15e58] worker_thread at ffffffff8108bda0 #11 [ffff898e35f15ee8] kthread at ffffffff81090fe6 PID: 45659 TASK: ffff880d313d2500 CPU: 31 COMMAND: "oracle_45659_ap" #0 [ffff881024ccfc98] __schedule at ffffffff8150bac4 #1 [ffff881024ccfd40] schedule at ffffffff8150c2cf #2 [ffff881024ccfd50] __mutex_lock_slowpath at ffffffff8150cee7 #3 [ffff881024ccfdc0] mutex_lock at ffffffff8150cdeb #4 [ffff881024ccfde0] rdma_destroy_id at ffffffffa022a027 [rdma_cm] #5 [ffff881024ccfe10] rds_ib_laddr_check at ffffffffa0357857 [rds_rdma] #6 [ffff881024ccfe50] rds_trans_get_preferred at ffffffffa0324c2a [rds] #7 [ffff881024ccfe80] rds_bind at ffffffffa031d690 [rds] #8 [ffff881024ccfeb0] sys_bind at ffffffff8142a670 PID: 45659 PID: 47039 rds_ib_laddr_check /* create id_priv with a null event_handler */ rdma_create_id rdma_bind_addr cma_acquire_dev /* add id_priv to cma_dev->id_list */ cma_attach_to_dev cma_ndev_work_handler /* event_hanlder is null */ id_priv->id.event_handler Signed-off-by: Guanglei Li Signed-off-by: Honglei Wang Reviewed-by: Junxiao Bi Reviewed-by: Yanjun Zhu Reviewed-by: Leon Romanovsky Acked-by: Santosh Shilimkar Acked-by: Doug Ledford Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

net, rds: convert rds_ib_device.refcount from atomic_t to refcount_t

2017-07-04T21:35:17Z

refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova Signed-off-by: Hans Liljestrand Signed-off-by: Kees Cook Signed-off-by: David Windsor Signed-off-by: David S. Miller

rds: remove unnecessary returned value check

2017-03-03T17:51:22Z

The function rds_trans_register always returns 0. As such, it is not necessary to check the returned value. Cc: Joe Jin Cc: Junxiao Bi Signed-off-by: Zhu Yanjun Reviewed-by: Yuval Shaia Acked-by: Santosh Shilimkar Signed-off-by: David S. Miller

rds: ib: add the static type to the variables

2017-03-01T17:50:58Z

The variables rds_ib_mr_1m_pool_size and rds_ib_mr_8k_pool_size are used only in the ib.c file. As such, the static type is added to limit them in this file. Cc: Joe Jin Cc: Junxiao Bi Signed-off-by: Zhu Yanjun Acked-by: Santosh Shilimkar Signed-off-by: David S. Miller

RDS: IB: fix ifnullfree.cocci warnings

2017-02-24T16:11:33Z

net/rds/ib.c:115:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values. NULL check before some freeing functions is not needed. Based on checkpatch warning "kfree(NULL) is safe this check is probably not required" and kfreeaddr.cocci by Julia Lawall. Generated by: scripts/coccinelle/free/ifnullfree.cocci Signed-off-by: Fengguang Wu Acked-by: Santosh Shilimkar Signed-off-by: David S. Miller

RDS: IB: Add vector spreading for cqs

2017-01-02T22:02:52Z

Based on available device vectors, allocate cqs accordingly to get better spread of completion vectors which helps performace great deal.. Signed-off-by: Santosh Shilimkar

IB/core: add support to create a unsafe global rkey to ib_create_pd

2016-09-23T17:47:44Z

Instead of exposing ib_get_dma_mr to ULPs and letting them use it more or less unchecked, this moves the capability of creating a global rkey into the RDMA core, where it can be easily audited. It also prints a warning everytime this feature is used as well. Signed-off-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Reviewed-by: Jason Gunthorpe Reviewed-by: Steve Wise Signed-off-by: Doug Ledford

RDS: TCP: Hooks to set up a single connection path

2016-07-01T20:45:17Z

This patch adds ->conn_path_connect callbacks in the rds_transport that are used to set up a single connection path. Acked-by: Santosh Shilimkar Signed-off-by: Sowmini Varadhan Signed-off-by: David S. Miller

RDS: TCP: make receive path use the rds_conn_path

2016-07-01T20:45:17Z

The ->sk_user_data contains a pointer to the rds_conn_path for the socket. Use this consistently in the rds_tcp_data_ready callbacks to get the rds_conn_path for rds_recv_incoming. Acked-by: Santosh Shilimkar Signed-off-by: Sowmini Varadhan Signed-off-by: David S. Miller