forge/linux-uconsole: Linux kernel for uConsole

Linux kernel for uConsole

C 97.1%
Assembly 1.8%
Shell 0.4%
Makefile 0.3%
Python 0.2%

Find a file

YueHaibing bdf3da72ae media: cpia2: Fix use-after-free in cpia2_exit commit `dea37a9726` upstream. Syzkaller report this: BUG: KASAN: use-after-free in sysfs_remove_file_ns+0x5f/0x70 fs/sysfs/file.c:468 Read of size 8 at addr ffff8881f59a6b70 by task syz-executor.0/8363 CPU: 0 PID: 8363 Comm: syz-executor.0 Not tainted 5.0.0-rc8+ #3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xfa/0x1ce lib/dump_stack.c:113 print_address_description+0x65/0x270 mm/kasan/report.c:187 kasan_report+0x149/0x18d mm/kasan/report.c:317 sysfs_remove_file_ns+0x5f/0x70 fs/sysfs/file.c:468 sysfs_remove_file include/linux/sysfs.h:519 [inline] driver_remove_file+0x40/0x50 drivers/base/driver.c:122 usb_remove_newid_files drivers/usb/core/driver.c:212 [inline] usb_deregister+0x12a/0x3b0 drivers/usb/core/driver.c:1005 cpia2_exit+0xa/0x16 [cpia2] __do_sys_delete_module kernel/module.c:1018 [inline] __se_sys_delete_module kernel/module.c:961 [inline] __x64_sys_delete_module+0x3dc/0x5e0 kernel/module.c:961 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x462e99 Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f86f3754c58 EFLAGS: 00000246 ORIG_RAX: 00000000000000b0 RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f86f37556bc R13: 00000000004bcca9 R14: 00000000006f6b48 R15: 00000000ffffffff Allocated by task 8363: set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc.constprop.3+0xa0/0xd0 mm/kasan/common.c:495 kmalloc include/linux/slab.h:545 [inline] kzalloc include/linux/slab.h:740 [inline] bus_add_driver+0xc0/0x610 drivers/base/bus.c:651 driver_register+0x1bb/0x3f0 drivers/base/driver.c:170 usb_register_driver+0x267/0x520 drivers/usb/core/driver.c:965 0xffffffffc1b4817c do_one_initcall+0xfa/0x5ca init/main.c:887 do_init_module+0x204/0x5f6 kernel/module.c:3460 load_module+0x66b2/0x8570 kernel/module.c:3808 __do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8363: set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:457 slab_free_hook mm/slub.c:1430 [inline] slab_free_freelist_hook mm/slub.c:1457 [inline] slab_free mm/slub.c:3005 [inline] kfree+0xe1/0x270 mm/slub.c:3957 kobject_cleanup lib/kobject.c:662 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:67 [inline] kobject_put+0x146/0x240 lib/kobject.c:708 bus_remove_driver+0x10e/0x220 drivers/base/bus.c:732 driver_unregister+0x6c/0xa0 drivers/base/driver.c:197 usb_register_driver+0x341/0x520 drivers/usb/core/driver.c:980 0xffffffffc1b4817c do_one_initcall+0xfa/0x5ca init/main.c:887 do_init_module+0x204/0x5f6 kernel/module.c:3460 load_module+0x66b2/0x8570 kernel/module.c:3808 __do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902 do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8881f59a6b40 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 48 bytes inside of 256-byte region [ffff8881f59a6b40, ffff8881f59a6c40) The buggy address belongs to the page: page:ffffea0007d66980 count:1 mapcount:0 mapping:ffff8881f6c02e00 index:0x0 flags: 0x2fffc0000000200(slab) raw: 02fffc0000000200 dead000000000100 dead000000000200 ffff8881f6c02e00 raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881f59a6a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881f59a6a80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc >ffff8881f59a6b00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8881f59a6b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881f59a6c00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc cpia2_init does not check return value of cpia2_init, if it failed in usb_register_driver, there is already cleanup using driver_unregister. No need call cpia2_usb_cleanup on module exit. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-05-31 06:46:04 -07:00
arch	arm64: errata: Add workaround for Cortex-A76 erratum #1463225	2019-05-31 06:46:03 -07:00
block	bfq: update internal depth state when queue depth changes	2019-05-16 19:41:17 +02:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: ccm - fix incompatibility between "ccm" and "ccm_base"	2019-05-22 07:37:43 +02:00
Documentation	arm64: errata: Add workaround for Cortex-A76 erratum #1463225	2019-05-31 06:46:03 -07:00
drivers	media: cpia2: Fix use-after-free in cpia2_exit	2019-05-31 06:46:04 -07:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	ovl: relax WARN_ON() for overlapping layers use case	2019-05-31 06:46:03 -07:00
include	bpf: add bpf_jit_limit knob to restrict unpriv allocations	2019-05-31 06:46:03 -07:00
init	init: initialize jump labels before command line option parsing	2019-05-16 19:41:23 +02:00
ipc	ipc/shm.c: use ERR_CAST() for shm_lock() error return	2018-10-05 16:32:04 -07:00
kernel	bpf: add bpf_jit_limit knob to restrict unpriv allocations	2019-05-31 06:46:03 -07:00
lib	sbitmap: fix improper use of smp_mb__before_atomic()	2019-05-31 06:46:00 -07:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	hugetlb: use same fault hash key for shared and private mappings	2019-05-22 07:37:40 +02:00
net	bpf: add bpf_jit_limit knob to restrict unpriv allocations	2019-05-31 06:46:03 -07:00
samples	samples: mei: use /dev/mei0 instead of /dev/mei	2019-02-15 08:10:11 +01:00
scripts	fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock	2019-05-08 07:21:51 +02:00
security	apparmorfs: fix use-after-free on symlink traversal	2019-05-25 18:23:42 +02:00
sound	ALSA: hda/realtek - Fix for Lenovo B50-70 inverted internal microphone bug	2019-05-22 07:37:44 +02:00
tools	Revert "selftests/bpf: skip verifier tests for unsupported program types"	2019-05-25 18:23:47 +02:00
usr	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
virt	KVM: arm/arm64: Ensure vcpu target is unset on reset failure	2019-05-25 18:23:44 +02:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	platform/x86: Add Intel AtomISP2 dummy / power-management driver	2019-04-20 09:16:02 +02:00
Makefile	Linux 4.19.46	2019-05-25 18:23:48 +02:00
README	Docs: Added a pointer to the formatted docs to README	2018-03-21 09:02:53 -06:00

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.
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.