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The vcstate for the splice vp may be NULL if this vp not registered as a crtc, this may trigger a null pointer access in the 8K mode: [ 84.267856] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000040 [ 84.344984] Mem abort info: [ 84.347778] ESR = 0x0000000096000005 [ 84.392721] Internal error: Oops: 0000000096000005 [#1] SMP [ 84.398289] Modules linked in: [ 84.401347] CPU: 6 PID: 779 Comm: weston Not tainted 6.1.99 #21 [ 84.407263] Hardware name: IP11HH-8K-104 V0.4 (DT) [ 84.412048] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 84.419005] pc : vop2_setup_dly_for_vp+0x1c/0x270 [ 84.423705] lr : vop2_crtc_atomic_begin+0xe90/0x2bb0 [ 84.428667] sp : ffffffc00c8db850 [ 84.431974] x29: ffffffc00c8db850 x28: 0000000000000001 x27:0000000000000000 [ 84.439101] x26: ffffff8005960080 x25: ffffff8006ae9600 x24:ffffff8005961458 [ 84.446226] x23: ffffffc009842850 x22: ffffff80059600f8 x21:ffffffc009823410 [ 84.453355] x20: ffffff8006ae9500 x19: ffffff8002054800 x18:0000000000000030 [ 84.460485] x17: 393431313a632e32 x16: 706f765f6d72645f x15:ffffffffffffffff [ 84.467614] x14: 0000000000000000 x13: 30393431313a632e x12:32706f765f6d7264 [ 84.474738] x11: 5f706968636b636f x10: ffffffc00a2438d8 x9 :ffffffc008813420 [ 84.481865] x8 : 0000000000000000 x7 : ffffffc00a2438d8 x6 :ffffff8005960080 [ 84.488989] x5 : 0000000000017ff4 x4 : ffffffc009418f68 x3 :0000000000000000 [ 84.496118] x2 : 0000000000000001 x1 : ffffff80072cd280 x0 :ffffff8005961458 [ 84.503246] Call trace: [ 84.505693] vop2_setup_dly_for_vp+0x1c/0x270 [ 84.510051] drm_atomic_helper_commit_planes+0x80/0x210 [ 84.515274] rockchip_drm_atomic_helper_commit_tail_rpm+0x19c/0x2fc [ 84.521540] commit_tail+0xa4/0x180 [ 84.525022] drm_atomic_helper_commit+0x16c/0x190 [ 84.529725] drm_atomic_commit+0xac/0xe0 [ 84.533652] drm_atomic_helper_set_config+0xd8/0x110 [ 84.538609] drm_mode_setcrtc+0x1b4/0x690 [ 84.542617] drm_ioctl_kernel+0xb4/0x100 [ 84.546542] drm_ioctl+0x208/0x440 [ 84.549947] __arm64_sys_ioctl+0xb4/0xdc [ 84.553869] invoke_syscall+0x4c/0x114 [ 84.557617] el0_svc_common.constprop.0+0x54/0x180 [ 84.562407] do_el0_svc+0x20/0x2c [ 84.565724] el0_svc+0x14/0x80 [ 84.568784] el0t_64_sync_handler+0xb0/0xb4 [ 84.572961] el0t_64_sync+0x158/0x15c Change-Id: Ic654f121cc180fb3f57834774eca856c3b87ecc1 Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
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.