linux

mirror of https://github.com/torvalds/linux.git synced 2024-11-23 20:51:44 +00:00

A mirror of the official Linux kernel repository just in case

Go to file

Geliang Tang 3ae32c0781 mptcp: clear use_ack and use_map when dropping other suboptions This patch cleared use_ack and use_map when dropping other suboptions to fix the following syzkaller BUG: [ 15.223006] BUG: unable to handle page fault for address: 0000000000223b10 [ 15.223700] #PF: supervisor read access in kernel mode [ 15.224209] #PF: error_code(0x0000) - not-present page [ 15.224724] PGD b8d5067 P4D b8d5067 PUD c0a5067 PMD 0 [ 15.225237] Oops: 0000 [#1] SMP [ 15.225556] CPU: 0 PID: 7747 Comm: syz-executor Not tainted 5.10.0-rc6+ #24 [ 15.226281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 15.227292] RIP: 0010:skb_release_data+0x89/0x1e0 [ 15.227816] Code: 5b 5d 41 5c 41 5d 41 5e 41 5f e9 02 06 8a ff e8 fd 05 8a ff 45 31 ed 80 7d 02 00 4c 8d 65 30 74 55 e8 eb 05 8a ff 49 8b 1c 24 <4c> 8b 7b 08 41 f6 c7 01 0f 85 18 01 00 00 e8 d4 05 8a ff 8b 43 34 [ 15.229669] RSP: 0018:ffffc900019c7c08 EFLAGS: 00010293 [ 15.230188] RAX: ffff88800daad900 RBX: 0000000000223b08 RCX: 0000000000000006 [ 15.230895] RDX: 0000000000000000 RSI: ffffffff818e06c5 RDI: ffff88807f6dc700 [ 15.231593] RBP: ffff88807f71a4c0 R08: 0000000000000001 R09: 0000000000000001 [ 15.232299] R10: ffffc900019c7c18 R11: 0000000000000000 R12: ffff88807f71a4f0 [ 15.233007] R13: 0000000000000000 R14: ffff88807f6dc700 R15: 0000000000000002 [ 15.233714] FS: 00007f65d9b5f700(0000) GS:ffff88807c400000(0000) knlGS:0000000000000000 [ 15.234509] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.235081] CR2: 0000000000223b10 CR3: 000000000b883000 CR4: 00000000000006f0 [ 15.235788] Call Trace: [ 15.236042] skb_release_all+0x28/0x30 [ 15.236419] __kfree_skb+0x11/0x20 [ 15.236768] tcp_data_queue+0x270/0x1240 [ 15.237161] ? tcp_urg+0x50/0x2a0 [ 15.237496] tcp_rcv_established+0x39a/0x890 [ 15.237997] ? mark_held_locks+0x49/0x70 [ 15.238467] tcp_v4_do_rcv+0xb9/0x270 [ 15.238915] __release_sock+0x8a/0x160 [ 15.239365] release_sock+0x32/0xd0 [ 15.239793] __inet_stream_connect+0x1d2/0x400 [ 15.240313] ? do_wait_intr_irq+0x80/0x80 [ 15.240791] inet_stream_connect+0x36/0x50 [ 15.241275] mptcp_stream_connect+0x69/0x1b0 [ 15.241787] __sys_connect+0x122/0x140 [ 15.242236] ? syscall_enter_from_user_mode+0x17/0x50 [ 15.242836] ? lockdep_hardirqs_on_prepare+0xd4/0x170 [ 15.243436] __x64_sys_connect+0x1a/0x20 [ 15.243924] do_syscall_64+0x33/0x40 [ 15.244313] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 15.244821] RIP: 0033:0x7f65d946e469 [ 15.245183] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 8b 0d ff 49 2b 00 f7 d8 64 89 01 48 [ 15.247019] RSP: 002b:00007f65d9b5eda8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 15.247770] RAX: ffffffffffffffda RBX: 000000000049bf00 RCX: 00007f65d946e469 [ 15.248471] RDX: 0000000000000010 RSI: 00000000200000c0 RDI: 0000000000000005 [ 15.249205] RBP: 000000000049bf00 R08: 0000000000000000 R09: 0000000000000000 [ 15.249908] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049bf0c [ 15.250603] R13: 00007fffe8a25cef R14: 00007f65d9b3f000 R15: 0000000000000003 [ 15.251312] Modules linked in: [ 15.251626] CR2: 0000000000223b10 [ 15.251965] BUG: kernel NULL pointer dereference, address: 0000000000000048 [ 15.252005] ---[ end trace f5c51fe19123c773 ]--- [ 15.252822] #PF: supervisor read access in kernel mode [ 15.252823] #PF: error_code(0x0000) - not-present page [ 15.252825] PGD c6c6067 P4D c6c6067 PUD c0d8067 [ 15.253294] RIP: 0010:skb_release_data+0x89/0x1e0 [ 15.253910] PMD 0 [ 15.253914] Oops: 0000 [#2] SMP [ 15.253917] CPU: 1 PID: 7746 Comm: syz-executor Tainted: G D 5.10.0-rc6+ #24 [ 15.253920] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 15.254435] Code: 5b 5d 41 5c 41 5d 41 5e 41 5f e9 02 06 8a ff e8 fd 05 8a ff 45 31 ed 80 7d 02 00 4c 8d 65 30 74 55 e8 eb 05 8a ff 49 8b 1c 24 <4c> 8b 7b 08 41 f6 c7 01 0f 85 18 01 00 00 e8 d4 05 8a ff 8b 43 34 [ 15.254899] RIP: 0010:skb_release_data+0x89/0x1e0 [ 15.254902] Code: 5b 5d 41 5c 41 5d 41 5e 41 5f e9 02 06 8a ff e8 fd 05 8a ff 45 31 ed 80 7d 02 00 4c 8d 65 30 74 55 e8 eb 05 8a ff 49 8b 1c 24 <4c> 8b 7b 08 41 f6 c7 01 0f 85 18 01 00 00 e8 d4 05 8a ff 8b 43 34 [ 15.254905] RSP: 0018:ffffc900019bfc08 EFLAGS: 00010293 [ 15.255376] RSP: 0018:ffffc900019c7c08 EFLAGS: 00010293 [ 15.255580] [ 15.255583] RAX: ffff888004a7ac80 RBX: 0000000000000040 RCX: 0000000000000000 [ 15.255912] [ 15.256724] RDX: 0000000000000000 RSI: ffffffff818e06c5 RDI: ffff88807f6ddd00 [ 15.257620] RAX: ffff88800daad900 RBX: 0000000000223b08 RCX: 0000000000000006 [ 15.259817] RBP: ffff88800e9006c0 R08: 0000000000000000 R09: 0000000000000000 [ 15.259818] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88800e9006f0 [ 15.259820] R13: 0000000000000000 R14: ffff88807f6ddd00 R15: 0000000000000002 [ 15.259822] FS: 00007fae4a60a700(0000) GS:ffff88807c500000(0000) knlGS:0000000000000000 [ 15.259826] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.260296] RDX: 0000000000000000 RSI: ffffffff818e06c5 RDI: ffff88807f6dc700 [ 15.262514] CR2: 0000000000000048 CR3: 000000000b89c000 CR4: 00000000000006e0 [ 15.262515] Call Trace: [ 15.262519] skb_release_all+0x28/0x30 [ 15.262523] __kfree_skb+0x11/0x20 [ 15.263054] RBP: ffff88807f71a4c0 R08: 0000000000000001 R09: 0000000000000001 [ 15.263680] tcp_data_queue+0x270/0x1240 [ 15.263843] R10: ffffc900019c7c18 R11: 0000000000000000 R12: ffff88807f71a4f0 [ 15.264693] ? tcp_urg+0x50/0x2a0 [ 15.264856] R13: 0000000000000000 R14: ffff88807f6dc700 R15: 0000000000000002 [ 15.265720] tcp_rcv_established+0x39a/0x890 [ 15.266438] FS: 00007f65d9b5f700(0000) GS:ffff88807c400000(0000) knlGS:0000000000000000 [ 15.267283] ? __schedule+0x3fa/0x880 [ 15.267287] tcp_v4_do_rcv+0xb9/0x270 [ 15.267290] __release_sock+0x8a/0x160 [ 15.268049] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.268788] release_sock+0x32/0xd0 [ 15.268791] __inet_stream_connect+0x1d2/0x400 [ 15.268795] ? do_wait_intr_irq+0x80/0x80 [ 15.269593] CR2: 0000000000223b10 CR3: 000000000b883000 CR4: 00000000000006f0 [ 15.270246] inet_stream_connect+0x36/0x50 [ 15.270250] mptcp_stream_connect+0x69/0x1b0 [ 15.270253] __sys_connect+0x122/0x140 [ 15.271097] Kernel panic - not syncing: Fatal exception [ 15.271820] ? syscall_enter_from_user_mode+0x17/0x50 [ 15.283542] ? lockdep_hardirqs_on_prepare+0xd4/0x170 [ 15.284275] __x64_sys_connect+0x1a/0x20 [ 15.284853] do_syscall_64+0x33/0x40 [ 15.285369] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 15.286105] RIP: 0033:0x7fae49f19469 [ 15.286638] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 8b 0d ff 49 2b 00 f7 d8 64 89 01 48 [ 15.289295] RSP: 002b:00007fae4a609da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 15.290375] RAX: ffffffffffffffda RBX: 000000000049bf00 RCX: 00007fae49f19469 [ 15.291403] RDX: 0000000000000010 RSI: 00000000200000c0 RDI: 0000000000000005 [ 15.292437] RBP: 000000000049bf00 R08: 0000000000000000 R09: 0000000000000000 [ 15.293456] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049bf0c [ 15.294473] R13: 00007fff0004b6bf R14: 00007fae4a5ea000 R15: 0000000000000003 [ 15.295492] Modules linked in: [ 15.295944] CR2: 0000000000000048 [ 15.296567] Kernel Offset: disabled [ 15.296941] ---[ end Kernel panic - not syncing: Fatal exception ]--- Reported-by: Christoph Paasch <cpaasch@apple.com> Fixes: `84dfe3677a` (mptcp: send out dedicated ADD_ADDR packet) Signed-off-by: Geliang Tang <geliangtang@gmail.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Link: https://lore.kernel.org/r/ccca4e8f01457a1b495c5d612ed16c5f7a585706.1608010058.git.geliangtang@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2020-12-16 16:20:38 -08:00
arch	Staging / IIO driver patches for 5.11-rc1	2020-12-15 14:18:40 -08:00
block	Scheduler updates:	2020-12-14 18:29:11 -08:00
certs	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
crypto	crypto: aegis128 - avoid spurious references crypto_aegis128_update_simd	2020-12-04 18:16:53 +11:00
Documentation	net/connector: Add const qualifier to cb_id	2020-12-16 11:06:49 -08:00
drivers	net: korina: fix return value	2020-12-16 15:01:07 -08:00
fs	Driver core updates for 5.11-rc1	2020-12-15 14:02:26 -08:00
include	devlink: use _BITUL() macro instead of BIT() in the UAPI header	2020-12-16 16:16:40 -08:00
init	Merge branch 'akpm' (patches from Andrew)	2020-12-15 12:53:37 -08:00
ipc	Merge branch 'akpm' (patches from Andrew)	2020-12-15 12:53:37 -08:00
kernel	Driver core updates for 5.11-rc1	2020-12-15 14:02:26 -08:00
lib	Driver core updates for 5.11-rc1	2020-12-15 14:02:26 -08:00
LICENSES	LICENSES: Add the CC-BY-4.0 license	2020-12-08 10:33:27 -07:00
mm	Networking updates for 5.11	2020-12-15 13:22:29 -08:00
net	mptcp: clear use_ack and use_map when dropping other suboptions	2020-12-16 16:20:38 -08:00
samples	samples/bpf: Fix possible hang in xdpsock with multiple threads	2020-12-10 23:13:43 +01:00
scripts	Networking updates for 5.11	2020-12-15 13:22:29 -08:00
security	Networking updates for 5.11	2020-12-15 13:22:29 -08:00
sound	Staging / IIO driver patches for 5.11-rc1	2020-12-15 14:18:40 -08:00
tools	Staging / IIO driver patches for 5.11-rc1	2020-12-15 14:18:40 -08:00
usr	Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-08-07 13:29:39 -07:00
virt	kvm: x86/mmu: Support dirty logging for the TDP MMU	2020-10-23 03:42:13 -04:00
.clang-format	RDMA 5.10 pull request	2020-10-17 11:18:18 -07:00
.cocciconfig
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	.gitignore: docs: ignore sphinx_*/ directories	2020-09-10 10:44:31 -06:00
.mailmap	mailmap: add two more addresses of Uwe Kleine-König	2020-12-06 10:19:07 -08:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-12-11 22:29:38 -08:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	Staging / IIO driver patches for 5.11-rc1	2020-12-15 14:18:40 -08:00
Makefile	Linux 5.10	2020-12-13 14:41:30 -08:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -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.

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.