forge/linux-uconsole: Linux kernel for uConsole

Linux kernel for uConsole

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Eric Dumazet d4ebd0fc93 tcp: fix error recovery in tcp_zerocopy_receive() [ Upstream commit `e776af608f` ] If user provides wrong virtual address in TCP_ZEROCOPY_RECEIVE operation we want to return -EINVAL error. But depending on zc->recv_skip_hint content, we might return -EIO error if the socket has SOCK_DONE set. Make sure to return -EINVAL in this case. BUG: KMSAN: uninit-value in tcp_zerocopy_receive net/ipv4/tcp.c:1833 [inline] BUG: KMSAN: uninit-value in do_tcp_getsockopt+0x4494/0x6320 net/ipv4/tcp.c:3685 CPU: 1 PID: 625 Comm: syz-executor.0 Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 tcp_zerocopy_receive net/ipv4/tcp.c:1833 [inline] do_tcp_getsockopt+0x4494/0x6320 net/ipv4/tcp.c:3685 tcp_getsockopt+0xf8/0x1f0 net/ipv4/tcp.c:3728 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:3131 __sys_getsockopt+0x533/0x7b0 net/socket.c:2177 __do_sys_getsockopt net/socket.c:2192 [inline] __se_sys_getsockopt+0xe1/0x100 net/socket.c:2189 __x64_sys_getsockopt+0x62/0x80 net/socket.c:2189 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1deeb72c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00000000004e01e0 RCX: 000000000045c829 RDX: 0000000000000023 RSI: 0000000000000006 RDI: 0000000000000009 RBP: 000000000078bf00 R08: 0000000020000200 R09: 0000000000000000 R10: 00000000200001c0 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000001d8 R14: 00000000004d3038 R15: 00007f1deeb736d4 Local variable ----zc@do_tcp_getsockopt created at: do_tcp_getsockopt+0x1a74/0x6320 net/ipv4/tcp.c:3670 do_tcp_getsockopt+0x1a74/0x6320 net/ipv4/tcp.c:3670 Fixes: `05255b823a` ("tcp: add TCP_ZEROCOPY_RECEIVE support for zerocopy receive") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-05-20 08:18:36 +02:00
arch	x86/unwind/orc: Fix premature unwind stoppage due to IRET frames	2020-05-14 07:57:23 +02:00
block	block, bfq: fix use-after-free in bfq_idle_slice_timer_body	2020-04-17 10:48:42 +02:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: api - Fix race condition in crypto_spawn_alg	2020-02-11 04:34:05 -08:00
Documentation	arm64: errata: Hide CTR_EL0.DIC on systems affected by Neoverse-N1 #1542419	2020-04-29 16:31:08 +02:00
drivers	pppoe: only process PADT targeted at local interfaces	2020-05-20 08:18:36 +02:00
firmware	Fix built-in early-load Intel microcode alignment	2020-01-23 08:21:29 +01:00
fs	coredump: fix crash when umh is disabled	2020-05-14 07:57:21 +02:00
include	net: stricter validation of untrusted gso packets	2020-05-14 07:57:19 +02:00
init	fork: fix some -Wmissing-prototypes warnings	2019-12-05 09:21:04 +01:00
ipc	ipc/mqueue.c: change __do_notify() to bypass check_kill_permission()	2020-05-14 07:57:23 +02:00
kernel	coredump: fix crash when umh is disabled	2020-05-14 07:57:21 +02:00
lib	lib: devres: add a helper function for ioremap_uc	2020-05-10 10:30:11 +02:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	shmem: fix possible deadlocks on shmlock_user_lock	2020-05-20 08:18:32 +02:00
net	tcp: fix error recovery in tcp_zerocopy_receive()	2020-05-20 08:18:36 +02:00
samples	vmalloc: fix remap_vmalloc_range() bounds checks	2020-04-29 16:31:27 +02:00
scripts	scripts/decodecode: fix trapping instruction formatting	2020-05-14 07:57:23 +02:00
security	selinux: properly handle multiple messages in selinux_netlink_send()	2020-05-06 08:13:32 +02:00
sound	ALSA: hda: Match both PCI ID and SSID for driver blacklist	2020-05-10 10:30:12 +02:00
tools	objtool: Fix stack offset tracking for indirect CFAs	2020-05-14 07:57:23 +02:00
usr	initramfs: restore default compression behavior	2020-04-13 10:44:59 +02:00
virt	KVM: arm64: Fix 32bit PC wrap-around	2020-05-14 07:57:20 +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	MAINTAINERS: Update drm/i915 bug filing URL	2020-02-28 16:38:49 +01:00
Makefile	Linux 4.19.123	2020-05-14 07:57:23 +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.