Sasha Levin 34f5b00664 atm: deal with setting entry before mkip was called ... If we didn't call ATMARP_MKIP before ATMARP_ENCAP the VCC descriptor is non-existant and we'll end up dereferencing a NULL ptr: [1033173.491930] kasan: GPF could be caused by NULL-ptr deref or user memory accessirq event stamp: 123386 [1033173.493678] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN [1033173.493689] Modules linked in: [1033173.493697] CPU: 9 PID: 23815 Comm: trinity-c64 Not tainted 4.2.0-next-20150911-sasha-00043-g353d875-dirty #2545 [1033173.493706] task: ffff8800630c4000 ti: ffff880063110000 task.ti: ffff880063110000 [1033173.493823] RIP: clip_ioctl (net/atm/clip.c:320 net/atm/clip.c:689) [1033173.493826] RSP: 0018:ffff880063117a88 EFLAGS: 00010203 [1033173.493828] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [1033173.493830] RDX: 0000000000000002 RSI: ffffffffb3f10720 RDI: 0000000000000014 [1033173.493832] RBP: ffff880063117b80 R08: ffff88047574d9a4 R09: 0000000000000000 [1033173.493834] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1000c622f53 [1033173.493836] R13: ffff8800cb905500 R14: ffff8808d6da2000 R15: 00000000fffffdfd [1033173.493840] FS: 00007fa56b92d700(0000) GS:ffff880478000000(0000) knlGS:0000000000000000 [1033173.493843] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [1033173.493845] CR2: 0000000000000000 CR3: 00000000630e8000 CR4: 00000000000006a0 [1033173.493855] Stack: [1033173.493862] ffffffffb0b60444 000000000000eaea 0000000041b58ab3 ffffffffb3c3ce32 [1033173.493867] ffffffffb0b6f3e0 ffffffffb0b60444 ffffffffb5ea2e50 1ffff1000c622f5e [1033173.493873] ffff8800630c4cd8 00000000000ee09a ffffffffb3ec4888 ffffffffb5ea2de8 [1033173.493874] Call Trace: [1033173.494108] do_vcc_ioctl (net/atm/ioctl.c:170) [1033173.494113] vcc_ioctl (net/atm/ioctl.c:189) [1033173.494116] svc_ioctl (net/atm/svc.c:605) [1033173.494200] sock_do_ioctl (net/socket.c:874) [1033173.494204] sock_ioctl (net/socket.c:958) [1033173.494244] do_vfs_ioctl (fs/ioctl.c:43 fs/ioctl.c:607) [1033173.494290] SyS_ioctl (fs/ioctl.c:622 fs/ioctl.c:613) [1033173.494295] entry_SYSCALL_64_fastpath (arch/x86/entry/entry_64.S:186) [1033173.494362] Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 50 09 00 00 49 8b 9e 60 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 14 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 14 09 00 All code ======== 0: fa cli 1: 48 c1 ea 03 shr $0x3,%rdx 5: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 9: 0f 85 50 09 00 00 jne 0x95f f: 49 8b 9e 60 06 00 00 mov 0x660(%r14),%rbx 16: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1d: fc ff df 20: 48 8d 7b 14 lea 0x14(%rbx),%rdi 24: 48 89 fa mov %rdi,%rdx 27: 48 c1 ea 03 shr $0x3,%rdx 2b:* 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2f: 48 89 fa mov %rdi,%rdx 32: 83 e2 07 and $0x7,%edx 35: 38 d0 cmp %dl,%al 37: 7f 08 jg 0x41 39: 84 c0 test %al,%al 3b: 0f 85 14 09 00 00 jne 0x955 Code starting with the faulting instruction =========================================== 0: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 4: 48 89 fa mov %rdi,%rdx 7: 83 e2 07 and $0x7,%edx a: 38 d0 cmp %dl,%al c: 7f 08 jg 0x16 e: 84 c0 test %al,%al 10: 0f 85 14 09 00 00 jne 0x92a [1033173.494366] RIP clip_ioctl (net/atm/clip.c:320 net/atm/clip.c:689) [1033173.494368] RSP <ffff880063117a88> Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-09-17 22:13:32 -07:00
..
addr.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
addr.h	atm: use const where reasonable	2008-06-17 16:20:06 -07:00
atm_misc.c	atm: eliminate atm_guess_pdu2truesize()	2011-11-26 16:40:30 -05:00
atm_sysfs.c	atm: use scnprintf() instead of sprintf()	2012-12-17 20:50:51 -08:00
br2684.c	br2684: Remove unnecessary formatting macros b1 and bs	2015-07-31 15:25:52 -07:00
clip.c	atm: deal with setting entry before mkip was called	2015-09-17 22:13:32 -07:00
common.c	net: Pass kern from net_proto_family.create to sk_alloc	2015-05-11 10:50:17 -04:00
common.h	net: Pass kern from net_proto_family.create to sk_alloc	2015-05-11 10:50:17 -04:00
ioctl.c	net: Convert net_ratelimit uses to net_<level>_ratelimited	2012-05-15 13:45:03 -04:00
Kconfig	[ATM]: atm is no longer experimental	2008-01-28 15:00:11 -08:00
lec_arpc.h
lec.c	atm: Use eth_<foo>_addr instead of memset	2015-03-03 17:01:37 -05:00
lec.h	net: add ETH_P_802_3_MIN	2013-03-28 01:20:42 -04:00
Makefile
mpc.c	net: Pass a "more" indication down into netdev_start_xmit() code paths.	2014-09-01 17:39:55 -07:00
mpc.h	atm: convert mpc device to using netdev_ops	2009-03-21 19:19:12 -07:00
mpoa_caches.c	net: Remove unnecessary returns from void function()s	2010-05-17 23:23:14 -07:00
mpoa_caches.h
mpoa_proc.c	treewide: Fix typo in printk messages	2015-03-06 23:04:40 +01:00
pppoatm.c	arch: Mass conversion of smp_mb__*()	2014-04-18 14:20:48 +02:00
proc.c	procfs: new helper - PDE_DATA(inode)	2013-04-09 14:13:32 -04:00
protocols.h
pvc.c	net: Pass kern from net_proto_family.create to sk_alloc	2015-05-11 10:50:17 -04:00
raw.c	net: Fix use after free by removing length arg from sk_data_ready callbacks.	2014-04-11 16:15:36 -04:00
resources.c	net🏧fix up ENOIOCTLCMD error handling	2012-08-31 16:14:33 -04:00
resources.h	atm: correct sysfs 'device' link creation and parent relationships	2010-12-10 15:45:05 -08:00
signaling.c	net/atm/signaling.c: remove WAIT_FOR_DEMON code	2015-03-03 14:22:11 -05:00
signaling.h
svc.c	net: Pass kern from net_proto_family.create to sk_alloc	2015-05-11 10:50:17 -04:00