CVE-2024-35990

In the Linux kernel, the following vulnerability has been resolved:

dma: xilinx_dpdma: Fix locking

There are several places where either chan->lock or chan->vchan.lock was

not held. Add appropriate locking. This fixes lockdep warnings like

[ 31.077578] ------------[ cut here ]------------

[ 31.077831] WARNING: CPU: 2 PID: 40 at drivers/dma/xilinx/xilinx_dpdma.c:834 xilinx_dpdma_chan_queue_transfer+0x274/0x5e0

[ 31.077953] Modules linked in:

[ 31.078019] CPU: 2 PID: 40 Comm: kworker/u12:1 Not tainted 6.6.20+ #98

[ 31.078102] Hardware name: xlnx,zynqmp (DT)

[ 31.078169] Workqueue: events_unbound deferred_probe_work_func

[ 31.078272] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)

[ 31.078377] pc : xilinx_dpdma_chan_queue_transfer+0x274/0x5e0

[ 31.078473] lr : xilinx_dpdma_chan_queue_transfer+0x270/0x5e0

[ 31.078550] sp : ffffffc083bb2e10

[ 31.078590] x29: ffffffc083bb2e10 x28: 0000000000000000 x27: ffffff880165a168

[ 31.078754] x26: ffffff880164e920 x25: ffffff880164eab8 x24: ffffff880164d480

[ 31.078920] x23: ffffff880165a148 x22: ffffff880164e988 x21: 0000000000000000

[ 31.079132] x20: ffffffc082aa3000 x19: ffffff880164e880 x18: 0000000000000000

[ 31.079295] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000

[ 31.079453] x14: 0000000000000000 x13: ffffff8802263dc0 x12: 0000000000000001

[ 31.079613] x11: 0001ffc083bb2e34 x10: 0001ff880164e98f x9 : 0001ffc082aa3def

[ 31.079824] x8 : 0001ffc082aa3dec x7 : 0000000000000000 x6 : 0000000000000516

[ 31.079982] x5 : ffffffc7f8d43000 x4 : ffffff88003c9c40 x3 : ffffffffffffffff

[ 31.080147] x2 : ffffffc7f8d43000 x1 : 00000000000000c0 x0 : 0000000000000000

[ 31.080307] Call trace:

[ 31.080340] xilinx_dpdma_chan_queue_transfer+0x274/0x5e0

[ 31.080518] xilinx_dpdma_issue_pending+0x11c/0x120

[ 31.080595] zynqmp_disp_layer_update+0x180/0x3ac

[ 31.080712] zynqmp_dpsub_plane_atomic_update+0x11c/0x21c

[ 31.080825] drm_atomic_helper_commit_planes+0x20c/0x684

[ 31.080951] drm_atomic_helper_commit_tail+0x5c/0xb0

[ 31.081139] commit_tail+0x234/0x294

[ 31.081246] drm_atomic_helper_commit+0x1f8/0x210

[ 31.081363] drm_atomic_commit+0x100/0x140

[ 31.081477] drm_client_modeset_commit_atomic+0x318/0x384

[ 31.081634] drm_client_modeset_commit_locked+0x8c/0x24c

[ 31.081725] drm_client_modeset_commit+0x34/0x5c

[ 31.081812] __drm_fb_helper_restore_fbdev_mode_unlocked+0x104/0x168

[ 31.081899] drm_fb_helper_set_par+0x50/0x70

[ 31.081971] fbcon_init+0x538/0xc48

[ 31.082047] visual_init+0x16c/0x23c

[ 31.082207] do_bind_con_driver.isra.0+0x2d0/0x634

[ 31.082320] do_take_over_console+0x24c/0x33c

[ 31.082429] do_fbcon_takeover+0xbc/0x1b0

[ 31.082503] fbcon_fb_registered+0x2d0/0x34c

[ 31.082663] register_framebuffer+0x27c/0x38c

[ 31.082767] __drm_fb_helper_initial_config_and_unlock+0x5c0/0x91c

[ 31.082939] drm_fb_helper_initial_config+0x50/0x74

[ 31.083012] drm_fbdev_dma_client_hotplug+0xb8/0x108

[ 31.083115] drm_client_register+0xa0/0xf4

[ 31.083195] drm_fbdev_dma_setup+0xb0/0x1cc

[ 31.083293] zynqmp_dpsub_drm_init+0x45c/0x4e0

[ 31.083431] zynqmp_dpsub_probe+0x444/0x5e0

[ 31.083616] platform_probe+0x8c/0x13c

[ 31.083713] really_probe+0x258/0x59c

[ 31.083793] __driver_probe_device+0xc4/0x224

[ 31.083878] driver_probe_device+0x70/0x1c0

[ 31.083961] __device_attach_driver+0x108/0x1e0

[ 31.084052] bus_for_each_drv+0x9c/0x100

[ 31.084125] __device_attach+0x100/0x298

[ 31.084207] device_initial_probe+0x14/0x20

[ 31.084292] bus_probe_device+0xd8/0xdc

[ 31.084368] deferred_probe_work_func+0x11c/0x180

[ 31.084451] process_one_work+0x3ac/0x988

[ 31.084643] worker_thread+0x398/0x694

[ 31.084752] kthread+0x1bc/0x1c0

[ 31.084848] ret_from_fork+0x10/0x20

[ 31.084932] irq event stamp: 64549

[ 31.084970] hardirqs last enabled at (64548): [<ffffffc081adf35c>] _raw_spin_unlock_irqrestore+0x80/0x90

[ 31.085157]

---truncated---