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- Validate vpss[i] and sw_base_addr before memset/memcpy operations - Add bounds checking for dev_num to prevent array overflow - Add error logging for invalid sw_base_addr during register restoration This resolves kernel panic caused by accessing uninitialized sw_base_addr during power management resume path. The issue occurred when restoring VPSS hardware registers from suspend state. Boot up on as below logs: [ 6.869681] lr : rkvpss_hw_runtime_resume+0x160/0x198 [ 6.870141] sp : ffffffc00969b930 [ 6.870444] x29: ffffffc00969b930 x28: ffffff80035e9800 x27: ffffff80020ad200 [ 6.871088] x26: 0000000000000003 x25: ffffffc0091f4000 x24: ffffff8001ed40a8 [ 6.871730] x23: ffffffc008cbf000 x22: ffffff8001953010 x21: ffffff8001ed40c8 [ 6.872373] x20: 0000000000000002 x19: ffffff8001ed4080 x18: 0000000000000000 [ 6.873018] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 [ 6.873652] x14: ffffff8001fb5025 x13: 0000000000000007 x12: ffffff800142c900 [ 6.874284] x11: 0000000000000002 x10: 00000007305dcf59 x9 : 0000000000000000 [ 6.874926] x8 : 0000018000000000 x7 : 0000000000000000 x6 : 000000000000003f [ 6.875567] x5 : 0000000000000040 x4 : 0000000000000000 x3 : 0000000000000004 [ 6.876208] x2 : 0000000000006f40 x1 : 0000000000000000 x0 : 0000018000000000 [ 6.876851] Call trace: [ 6.877076] __memset+0x16c/0x188 [ 6.877375] pm_generic_runtime_resume+0x24/0x34 [ 6.877787] __rpm_callback+0x40/0x11c [ 6.878129] rpm_callback+0x68/0x6c [ 6.878448] rpm_resume+0x304/0x37c [ 6.878767] __pm_runtime_resume+0x50/0x74 [ 6.879132] ofl_open+0x4c/0xc8 [ 6.879419] v4l2_open+0x98/0xec [ 6.879714] chrdev_open+0x158/0x164 [ 6.880048] do_dentry_open+0x2d4/0x350 Change-Id: Iab179899258189d7bdf9ccc9bb13d07c25d80910 Signed-off-by: Caesar Wang <wxt@rock-chips.com> Signed-off-by: Cai YiWei <cyw@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.