mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-08 03:40:35 +09:00
260b32e594
connector and encoder should be removed when bind failed, otherwise will lead to system panic when enable SLUB and SLUB_DEBUG: [ 1.071801] rockchip-drm display-subsystem: failed to bind ff960000.dsi (ops dw_mipi_dsi_ops): -517 [ 1.073943] Unable to handle kernel paging request at virtual address 006b6b6b6b6b6b73 …… [ 1.442300] pc : drm_mode_config_cleanup+0x4c/0x2f8 [ 1.447179] lr : rockchip_drm_bind+0x610/0x1c38 after enable KASAN, we can see the UAF error: [ 3.862556] BUG: KASAN: use-after-free in rockchip_drm_bind+0x474/0x2b58 [ 3.862611] Read of size 4 at addr ffffffc00a21f55c by task swapper/0/1 [ 3.862691] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 4.19.101 #1820 [ 3.862737] Hardware name: Rockchip rk3368 808 evb board (DT) [ 3.862782] Call trace: [ 3.862853] dump_backtrace+0x0/0x240 [ 3.862905] show_stack+0x14/0x20 [ 3.863146] kasan_report+0xc/0x18 [ 3.863265] rockchip_drm_bind+0x474/0x2b58 …… [ 3.864314] Allocated by task 1: [ 3.864376] __kasan_kmalloc.isra.0+0x100/0x1b8 [ 3.864435] kasan_slab_alloc+0x14/0x20 [ 3.864493] __kmalloc_track_caller+0x154/0x368 [ 3.864550] devm_kmalloc+0x30/0xb0 [ 3.864611] dw_hdmi_rockchip_bind+0xcc/0xa28 [ 3.864668] component_bind_all+0x1d8/0x450 [ 3.864728] rockchip_drm_bind+0x450/0x2b58 …… [ 3.865787] Freed by task 1: [ 3.865851] __kasan_slab_free+0x118/0x220 [ 3.865897] kasan_slab_free+0x10/0x18 [ 3.865952] kfree+0x7c/0x308 [ 3.866012] release_nodes+0x248/0x4a0 [ 3.866070] devres_release_group+0xd4/0x148 [ 3.866127] component_unbind.isra.7+0x98/0xc8 [ 3.866183] component_bind_all+0x3b0/0x450 [ 3.866247] rockchip_drm_bind+0x450/0x2b58 Change-Id: I6378bf34d8b953fb770badfafdd3fe44628505f7 Signed-off-by: Sandy Huang <hjc@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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.