Sasha Levin 7918313da2 rds: prevent dereference of a NULL device ... [ Upstream commit c2349758acf1874e4c2b93fe41d072336f1a31d0 ] Binding might result in a NULL device, which is dereferenced causing this BUG: [ 1317.260548] BUG: unable to handle kernel NULL pointer dereference at 000000000000097 4 [ 1317.261847] IP: [<ffffffff84225f52>] rds_ib_laddr_check+0x82/0x110 [ 1317.263315] PGD 418bcb067 PUD 3ceb21067 PMD 0 [ 1317.263502] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 1317.264179] Dumping ftrace buffer: [ 1317.264774] (ftrace buffer empty) [ 1317.265220] Modules linked in: [ 1317.265824] CPU: 4 PID: 836 Comm: trinity-child46 Tainted: G W 3.13.0-rc4- next-20131218-sasha-00013-g2cebb9b-dirty #4159 [ 1317.267415] task: ffff8803ddf33000 ti: ffff8803cd31a000 task.ti: ffff8803cd31a000 [ 1317.268399] RIP: 0010:[<ffffffff84225f52>] [<ffffffff84225f52>] rds_ib_laddr_check+ 0x82/0x110 [ 1317.269670] RSP: 0000:ffff8803cd31bdf8 EFLAGS: 00010246 [ 1317.270230] RAX: 0000000000000000 RBX: ffff88020b0dd388 RCX: 0000000000000000 [ 1317.270230] RDX: ffffffff8439822e RSI: 00000000000c000a RDI: 0000000000000286 [ 1317.270230] RBP: ffff8803cd31be38 R08: 0000000000000000 R09: 0000000000000000 [ 1317.270230] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 [ 1317.270230] R13: 0000000054086700 R14: 0000000000a25de0 R15: 0000000000000031 [ 1317.270230] FS: 00007ff40251d700(0000) GS:ffff88022e200000(0000) knlGS:000000000000 0000 [ 1317.270230] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 1317.270230] CR2: 0000000000000974 CR3: 00000003cd478000 CR4: 00000000000006e0 [ 1317.270230] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1317.270230] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000090602 [ 1317.270230] Stack: [ 1317.270230] 0000000054086700 5408670000a25de0 5408670000000002 0000000000000000 [ 1317.270230] ffffffff84223542 00000000ea54c767 0000000000000000 ffffffff86d26160 [ 1317.270230] ffff8803cd31be68 ffffffff84223556 ffff8803cd31beb8 ffff8800c6765280 [ 1317.270230] Call Trace: [ 1317.270230] [<ffffffff84223542>] ? rds_trans_get_preferred+0x42/0xa0 [ 1317.270230] [<ffffffff84223556>] rds_trans_get_preferred+0x56/0xa0 [ 1317.270230] [<ffffffff8421c9c3>] rds_bind+0x73/0xf0 [ 1317.270230] [<ffffffff83e4ce62>] SYSC_bind+0x92/0xf0 [ 1317.270230] [<ffffffff812493f8>] ? context_tracking_user_exit+0xb8/0x1d0 [ 1317.270230] [<ffffffff8119313d>] ? trace_hardirqs_on+0xd/0x10 [ 1317.270230] [<ffffffff8107a852>] ? syscall_trace_enter+0x32/0x290 [ 1317.270230] [<ffffffff83e4cece>] SyS_bind+0xe/0x10 [ 1317.270230] [<ffffffff843a6ad0>] tracesys+0xdd/0xe2 [ 1317.270230] Code: 00 8b 45 cc 48 8d 75 d0 48 c7 45 d8 00 00 00 00 66 c7 45 d0 02 00 89 45 d4 48 89 df e8 78 49 76 ff 41 89 c4 85 c0 75 0c 48 8b 03 <80> b8 74 09 00 00 01 7 4 06 41 bc 9d ff ff ff f6 05 2a b6 c2 02 [ 1317.270230] RIP [<ffffffff84225f52>] rds_ib_laddr_check+0x82/0x110 [ 1317.270230] RSP <ffff8803cd31bdf8> [ 1317.270230] CR2: 0000000000000974 Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-01-15 15:27:11 -08:00
..
Kconfig	rds: drop "select LLIST"	2011-11-14 00:10:50 -05:00
Makefile	…
af_rds.c	rds: Make rds_sock_lock BH rather than IRQ safe.	2012-01-24 17:03:44 -05:00
bind.c	net/rds: use prink_ratelimited() instead of printk_ratelimit()	2011-06-17 00:03:03 -04:00
cong.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
connection.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
ib.c	rds: prevent dereference of a NULL device	2014-01-15 15:27:11 -08:00
ib.h	…
ib_cm.c	RDS: use gfp flags from caller in conn_alloc()	2012-03-22 19:29:58 -04:00
ib_rdma.c	net, rds, Replace xlist in net/rds/xlist.h with llist	2011-09-15 15:36:32 -04:00
ib_recv.c	Merge branch 'kmap_atomic' of git://github.com/congwang/linux	2012-03-21 09:40:26 -07:00
ib_ring.c	…
ib_send.c	rds: prevent BUG_ON triggered on congestion update to loopback	2014-01-15 15:27:10 -08:00
ib_stats.c	…
ib_sysctl.c	…
info.c	rds: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:28 +08:00
info.h	…
iw.c	net: Fix files explicitly needing to include module.h	2011-10-31 19:30:28 -04:00
iw.h	…
iw_cm.c	RDS: use gfp flags from caller in conn_alloc()	2012-03-22 19:29:58 -04:00
iw_rdma.c	RDS: Remove some unused iWARP code	2012-01-12 20:05:28 -08:00
iw_recv.c	Merge branch 'kmap_atomic' of git://github.com/congwang/linux	2012-03-21 09:40:26 -07:00
iw_ring.c	…
iw_send.c	net/rds: use prink_ratelimited() instead of printk_ratelimit()	2011-06-17 00:03:03 -04:00
iw_stats.c	…
iw_sysctl.c	…
loop.c	RDS: use gfp flags from caller in conn_alloc()	2012-03-22 19:29:58 -04:00
loop.h	…
message.c	rds: limit the size allocated by rds_message_alloc()	2013-03-20 13:05:01 -07:00
page.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
rdma.c	…
rdma_transport.c	net: Fix files explicitly needing to include module.h	2011-10-31 19:30:28 -04:00
rdma_transport.h	…
rds.h	rds: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:28 +08:00
recv.c	net: rework recvmsg handler msg_name and msg_namelen logic	2013-12-08 07:29:41 -08:00
send.c	RDS: fix rds-ping spinlock recursion	2012-10-28 10:14:15 -07:00
stats.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
sysctl.c	…
tcp.c	net: Fix files explicitly needing to include module.h	2011-10-31 19:30:28 -04:00
tcp.h	…
tcp_connect.c	…
tcp_listen.c	…
tcp_recv.c	rds: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:28 +08:00
tcp_send.c	…
tcp_stats.c	net: rds: fix const array syntax	2011-07-01 16:16:19 -07:00
threads.c	net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules	2011-10-31 19:30:30 -04:00
transport.c	…