mirror of
https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-10 22:40:54 -04:00
No description
- C 98.2%
- Assembly 1%
- Makefile 0.3%
- Shell 0.2%
- Python 0.1%
| Filename | Latest commit message | Latest commit date |
|---|---|---|
9464956544
commit f5e5677c420346b4e9788051c2e4d750996c428c upstream.
NULL pointer exception happens occasionally on serial output initiated
by login timeout. This was reproduced only if kernel was built with
significant debugging options and EDMA driver is used with serial
console.
col-vf50 login: root
Password:
Login timed out after 60 seconds.
Unable to handle kernel NULL pointer dereference at virtual address 00000044
Internal error: Oops: 5 [#1] ARM
CPU: 0 PID: 157 Comm: login Not tainted 5.7.0-next-20200610-dirty #4
Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
(fsl_edma_tx_handler) from [<8016eb10>] (__handle_irq_event_percpu+0x64/0x304)
(__handle_irq_event_percpu) from [<8016eddc>] (handle_irq_event_percpu+0x2c/0x7c)
(handle_irq_event_percpu) from [<8016ee64>] (handle_irq_event+0x38/0x5c)
(handle_irq_event) from [<801729e4>] (handle_fasteoi_irq+0xa4/0x160)
(handle_fasteoi_irq) from [<8016ddcc>] (generic_handle_irq+0x34/0x44)
(generic_handle_irq) from [<8016e40c>] (__handle_domain_irq+0x54/0xa8)
(__handle_domain_irq) from [<80508bc8>] (gic_handle_irq+0x4c/0x80)
(gic_handle_irq) from [<80100af0>] (__irq_svc+0x70/0x98)
Exception stack(0x8459fe80 to 0x8459fec8)
fe80: 72286b00 e3359f64 00000001 0000412d a0070013 85c98840 85c98840 a0070013
fea0: 8054e0d4 00000000 00000002 00000000 00000002 8459fed0 8081fbe8 8081fbec
fec0: 60070013 ffffffff
(__irq_svc) from [<8081fbec>] (_raw_spin_unlock_irqrestore+0x30/0x58)
(_raw_spin_unlock_irqrestore) from [<8056cb48>] (uart_flush_buffer+0x88/0xf8)
(uart_flush_buffer) from [<80554e60>] (tty_ldisc_hangup+0x38/0x1ac)
(tty_ldisc_hangup) from [<8054c7f4>] (__tty_hangup+0x158/0x2bc)
(__tty_hangup) from [<80557b90>] (disassociate_ctty.part.1+0x30/0x23c)
(disassociate_ctty.part.1) from [<8011fc18>] (do_exit+0x580/0xba0)
(do_exit) from [<801214f8>] (do_group_exit+0x3c/0xb4)
(do_group_exit) from [<80121580>] (__wake_up_parent+0x0/0x14)
Issue looks like race condition between interrupt handler fsl_edma_tx_handler()
(called as result of fsl_edma_xfer_desc()) and terminating the transfer with
fsl_edma_terminate_all().
The fsl_edma_tx_handler() handles interrupt for a transfer with already freed
edesc and idle==true.
Fixes:
|
||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.