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6885d58eb4
[ Upstream commit f0212a5ebfa6cd789ab47666b9cc169e6e688732 ] Running with KASAN on a VIM3L systems leads to the following splat when probing the Ethernet device: ================================================================== BUG: KASAN: global-out-of-bounds in _get_maxdiv+0x74/0xd8 Read of size 4 at addr ffffa000090615f4 by task systemd-udevd/139 CPU: 1 PID: 139 Comm: systemd-udevd Tainted: G E 5.7.0-rc1-00101-g8624b7577b9c #781 Hardware name: amlogic w400/w400, BIOS 2020.01-rc5 03/12/2020 Call trace: dump_backtrace+0x0/0x2a0 show_stack+0x20/0x30 dump_stack+0xec/0x148 print_address_description.isra.12+0x70/0x35c __kasan_report+0xfc/0x1d4 kasan_report+0x4c/0x68 __asan_load4+0x9c/0xd8 _get_maxdiv+0x74/0xd8 clk_divider_bestdiv+0x74/0x5e0 clk_divider_round_rate+0x80/0x1a8 clk_core_determine_round_nolock.part.9+0x9c/0xd0 clk_core_round_rate_nolock+0xf0/0x108 clk_hw_round_rate+0xac/0xf0 clk_factor_round_rate+0xb8/0xd0 clk_core_determine_round_nolock.part.9+0x9c/0xd0 clk_core_round_rate_nolock+0xf0/0x108 clk_core_round_rate_nolock+0xbc/0x108 clk_core_set_rate_nolock+0xc4/0x2e8 clk_set_rate+0x58/0xe0 meson8b_dwmac_probe+0x588/0x72c [dwmac_meson8b] platform_drv_probe+0x78/0xd8 really_probe+0x158/0x610 driver_probe_device+0x140/0x1b0 device_driver_attach+0xa4/0xb0 __driver_attach+0xcc/0x1c8 bus_for_each_dev+0xf4/0x168 driver_attach+0x3c/0x50 bus_add_driver+0x238/0x2e8 driver_register+0xc8/0x1e8 __platform_driver_register+0x88/0x98 meson8b_dwmac_driver_init+0x28/0x1000 [dwmac_meson8b] do_one_initcall+0xa8/0x328 do_init_module+0xe8/0x368 load_module+0x3300/0x36b0 __do_sys_finit_module+0x120/0x1a8 __arm64_sys_finit_module+0x4c/0x60 el0_svc_common.constprop.2+0xe4/0x268 do_el0_svc+0x98/0xa8 el0_svc+0x24/0x68 el0_sync_handler+0x12c/0x318 el0_sync+0x158/0x180 The buggy address belongs to the variable: div_table.63646+0x34/0xfffffffffffffa40 [dwmac_meson8b] Memory state around the buggy address: ffffa00009061480: fa fa fa fa 00 00 00 01 fa fa fa fa 00 00 00 00 ffffa00009061500: 05 fa fa fa fa fa fa fa 00 04 fa fa fa fa fa fa >ffffa00009061580: 00 03 fa fa fa fa fa fa 00 00 00 00 00 00 fa fa ^ ffffa00009061600: fa fa fa fa 00 01 fa fa fa fa fa fa 01 fa fa fa ffffa00009061680: fa fa fa fa 00 01 fa fa fa fa fa fa 04 fa fa fa ================================================================== Digging into this indeed shows that the clock divider array is lacking a final fence, and that the clock subsystems goes in the weeds. Oh well. Let's add the empty structure that indicates the end of the array. Fixes: bd6f48546b9c ("net: stmmac: dwmac-meson8b: Fix the RGMII TX delay on Meson8b/8m2 SoCs") Signed-off-by: Marc Zyngier <maz@kernel.org> Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.