YueHaibing 58bdd544e2 net: nfc: Fix NULL dereference on nfc_llcp_build_tlv fails ... 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>		2019-02-27 12:47:08 -08:00
..
hci	NFC: Fix possible memory corruption when handling SHDLC I-Frame commands	2018-09-18 19:55:01 -07:00
nci	Merge branch 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-10-24 14:43:41 +01:00
Kconfig	NFC Digital: Add NFC-F technology support	2013-09-25 02:02:25 +02:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
af_nfc.c	net: socket: mark socket protocol handler structs as const	2017-05-16 11:54:07 -04:00
core.c	NFC: Convert timers to use timer_setup()	2017-11-06 01:12:10 +01:00
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 cmd when deactivating target	2017-11-10 00:03:39 +01:00
digital_dep.c	NFC: digital: NFC-DEP Target WT(nfcdep,max) is now 14	2017-06-23 00:19:59 +02:00
digital_technology.c	NFC: digital: NFC-A SEL_RES must be one byte	2017-06-23 00:19:59 +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	2019-02-27 12:47:08 -08:00
llcp_core.c	net: nfc: Fix NULL dereference on nfc_llcp_build_tlv fails	2019-02-27 12:47:08 -08:00
llcp_sock.c	Revert "net: simplify sock_poll_wait"	2018-10-23 10:57:06 -07:00
netlink.c	net: remove unnecessary genlmsg_cancel() calls	2018-05-29 09:53:38 -04:00
nfc.h	nfc: netlink: HCI event connectivity implementation	2015-12-29 19:06:20 +01:00
rawsock.c	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00