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da0f70eada
[ Upstream commit 661f385961f06f36da24cf408d461f988d0c39ad ] During connection setup, the application may choose to zero-size inbound and outbound READ queues, as well as the Receive queue. This patch fixes handling of zero-sized queues, but not prevents it. Kamal Heib says in an initial error report: When running the blktests over siw the following shift-out-of-bounds is reported, this is happening because the passed IRD or ORD from the ulp could be zero which will lead to unexpected behavior when calling roundup_pow_of_two(), fix that by blocking zero values of ORD or IRD. UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13 shift exponent 64 is too large for 64-bit type 'long unsigned int' CPU: 20 PID: 3957 Comm: kworker/u64:13 Tainted: G S 5.10.0-rc6 #2 Hardware name: Dell Inc. PowerEdge R630/02C2CP, BIOS 2.1.5 04/11/2016 Workqueue: iw_cm_wq cm_work_handler [iw_cm] Call Trace: dump_stack+0x99/0xcb ubsan_epilogue+0x5/0x40 __ubsan_handle_shift_out_of_bounds.cold.11+0xb4/0xf3 ? down_write+0x183/0x3d0 siw_qp_modify.cold.8+0x2d/0x32 [siw] ? __local_bh_enable_ip+0xa5/0xf0 siw_accept+0x906/0x1b60 [siw] ? xa_load+0x147/0x1f0 ? siw_connect+0x17a0/0x17a0 [siw] ? lock_downgrade+0x700/0x700 ? siw_get_base_qp+0x1c2/0x340 [siw] ? _raw_spin_unlock_irqrestore+0x39/0x40 iw_cm_accept+0x1f4/0x430 [iw_cm] rdma_accept+0x3fa/0xb10 [rdma_cm] ? check_flush_dependency+0x410/0x410 ? cma_rep_recv+0x570/0x570 [rdma_cm] nvmet_rdma_queue_connect+0x1a62/0x2680 [nvmet_rdma] ? nvmet_rdma_alloc_cmds+0xce0/0xce0 [nvmet_rdma] ? lock_release+0x56e/0xcc0 ? lock_downgrade+0x700/0x700 ? lock_downgrade+0x700/0x700 ? __xa_alloc_cyclic+0xef/0x350 ? __xa_alloc+0x2d0/0x2d0 ? rdma_restrack_add+0xbe/0x2c0 [ib_core] ? __ww_mutex_die+0x190/0x190 cma_cm_event_handler+0xf2/0x500 [rdma_cm] iw_conn_req_handler+0x910/0xcb0 [rdma_cm] ? _raw_spin_unlock_irqrestore+0x39/0x40 ? trace_hardirqs_on+0x1c/0x150 ? cma_ib_handler+0x8a0/0x8a0 [rdma_cm] ? __kasan_kmalloc.constprop.7+0xc1/0xd0 cm_work_handler+0x121c/0x17a0 [iw_cm] ? iw_cm_reject+0x190/0x190 [iw_cm] ? trace_hardirqs_on+0x1c/0x150 process_one_work+0x8fb/0x16c0 ? pwq_dec_nr_in_flight+0x320/0x320 worker_thread+0x87/0xb40 ? __kthread_parkme+0xd1/0x1a0 ? process_one_work+0x16c0/0x16c0 kthread+0x35f/0x430 ? kthread_mod_delayed_work+0x180/0x180 ret_from_fork+0x22/0x30 Fixes: |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.