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YueHaibing 05d3d2d0b8 net: nfc: Fix NULL dereference on nfc_llcp_build_tlv fails 
[ Upstream commit 58bdd544e2 ]

KASAN report this:

BUG: KASAN: null-ptr-deref in nfc_llcp_build_gb+0x37f/0x540 [nfc]
Read of size 3 at addr 0000000000000000 by task syz-executor.0/5401

CPU: 0 PID: 5401 Comm: syz-executor.0 Not tainted 5.0.0-rc7+ #45
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
 kasan_report+0x171/0x18d mm/kasan/report.c:321
 memcpy+0x1f/0x50 mm/kasan/common.c:130
 nfc_llcp_build_gb+0x37f/0x540 [nfc]
 nfc_llcp_register_device+0x6eb/0xb50 [nfc]
 nfc_register_device+0x50/0x1d0 [nfc]
 nfcsim_device_new+0x394/0x67d [nfcsim]
 ? 0xffffffffc1080000
 nfcsim_init+0x6b/0x1000 [nfcsim]
 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
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:00007f9cb79dcc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 000000000073bf00 RCX: 0000000000462e99
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00007f9cb79dcc70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9cb79dd6bc
R13: 00000000004bcefb R14: 00000000006f7030 R15: 0000000000000004

nfc_llcp_build_tlv will return NULL on fails, caller should check it,
otherwise will trigger a NULL dereference.

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: eda21f16a5 ("NFC: Set MIU and RW values from CONNECT and CC LLCP frames")
Fixes: d646960f79 ("NFC: Initial LLCP support")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2019-03-13 14:04:53 -07:00
..
hci NFC: Fix possible memory corruption when handling SHDLC I-Frame commands 2018-09-29 03:07:30 -07:00
nci NFC: fix broken device allocation 2017-07-27 15:07:56 -07:00
Kconfig NFC Digital: Add NFC-F technology support 2013-09-25 02:02:25 +02:00
Makefile NFC Digital: Add initiator NFC-DEP support 2013-09-25 02:02:27 +02:00
af_nfc.c net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
core.c NFC: fix device-allocation error return 2017-11-30 08:39:07 +00:00
digital.h NFC: digital: Add 'tg_listen_md' and 'tg_get_rf_tech' driver hooks 2014-07-23 01:17:31 +02:00
digital_core.c NFC: digital: Abort last command when dep link goes down 2016-07-06 10:26:52 +02:00
digital_dep.c NFC: digital: Fix RTOX supervisor PDU handling 2016-07-11 02:02:03 +02:00
digital_technology.c NFC: digital: Fix a memory leak in NFC-F listening mode 2016-07-06 10:03:08 +02:00
llcp.h net: Pass kern from net_proto_family.create to sk_alloc 2015-05-11 10:50:17 -04:00
llcp_commands.c net: nfc: Fix NULL dereference on nfc_llcp_build_tlv fails 2019-03-13 14:04:53 -07:00
llcp_core.c net: nfc: Fix NULL dereference on nfc_llcp_build_tlv fails 2019-03-13 14:04:53 -07:00
llcp_sock.c NFC: Add sockaddr length checks before accessing sa_family in bind handlers 2017-07-27 15:07:56 -07:00
netlink.c NFC: llcp: Limit size of SDP URI 2018-05-30 07:50:28 +02:00
nfc.h nfc: netlink: HCI event connectivity implementation 2015-12-29 19:06:20 +01:00
rawsock.c NFC: netlink: Add mode parameter to deactivate_target functions 2015-10-27 03:55:12 +01:00