forked from Minki/linux
mainlining shenanigans
672ecbe1c9
In tipc_topsrv_kern_subscr() when s->tipc_conn_new() fails
we call tipc_close_conn() to clean up, but in this case
calling conn_put() is just enough.
This fixes the folllowing crash:
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3085 Comm: syzkaller064164 Not tainted 4.15.0-rc1+ #137
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 00000000c24413a5 task.stack: 000000005e8160b5
RIP: 0010:__lock_acquire+0xd55/0x47f0 kernel/locking/lockdep.c:3378
RSP: 0018:ffff8801cb5474a8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000004 RSI: 0000000000000000 RDI: ffffffff85ecb400
RBP: ffff8801cb547830 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff87489d60 R12: ffff8801cd2980c0
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS: 00000000014ee880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffee2426e40 CR3: 00000001cb85a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:175
spin_lock_bh include/linux/spinlock.h:320 [inline]
tipc_subscrb_subscrp_delete+0x8f/0x470 net/tipc/subscr.c:201
tipc_subscrb_delete net/tipc/subscr.c:238 [inline]
tipc_subscrb_release_cb+0x17/0x30 net/tipc/subscr.c:316
tipc_close_conn+0x171/0x270 net/tipc/server.c:204
tipc_topsrv_kern_subscr+0x724/0x810 net/tipc/server.c:514
tipc_group_create+0x702/0x9c0 net/tipc/group.c:184
tipc_sk_join net/tipc/socket.c:2747 [inline]
tipc_setsockopt+0x249/0xc10 net/tipc/socket.c:2861
SYSC_setsockopt net/socket.c:1851 [inline]
SyS_setsockopt+0x189/0x360 net/socket.c:1830
entry_SYSCALL_64_fastpath+0x1f/0x96
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.