diff options
Diffstat (limited to 'target/linux/generic/patches-3.18/081-08-pppoe-fix-memory-corruption-in-padt-work-structure.patch')
-rw-r--r-- | target/linux/generic/patches-3.18/081-08-pppoe-fix-memory-corruption-in-padt-work-structure.patch | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/target/linux/generic/patches-3.18/081-08-pppoe-fix-memory-corruption-in-padt-work-structure.patch b/target/linux/generic/patches-3.18/081-08-pppoe-fix-memory-corruption-in-padt-work-structure.patch deleted file mode 100644 index 147e9712db..0000000000 --- a/target/linux/generic/patches-3.18/081-08-pppoe-fix-memory-corruption-in-padt-work-structure.patch +++ /dev/null @@ -1,82 +0,0 @@ -From: Guillaume Nault <g.nault@alphalink.fr> -Date: Thu, 3 Dec 2015 16:49:32 +0100 -Subject: [PATCH] pppoe: fix memory corruption in padt work structure - -pppoe_connect() mustn't touch the padt_work field of pppoe sockets -because that work could be already pending. - -[ 21.473147] BUG: unable to handle kernel NULL pointer dereference at 00000004 -[ 21.474523] IP: [<c1043177>] process_one_work+0x29/0x31c -[ 21.475164] *pde = 00000000 -[ 21.475513] Oops: 0000 [#1] SMP -[ 21.475910] Modules linked in: pppoe pppox ppp_generic slhc crc32c_intel aesni_intel virtio_net xts aes_i586 lrw gf128mul ablk_helper cryptd evdev acpi_cpufreq processor serio_raw button ext4 crc16 mbcache jbd2 virtio_blk virtio_pci virtio_ring virtio -[ 21.476168] CPU: 2 PID: 164 Comm: kworker/2:2 Not tainted 4.4.0-rc1 #1 -[ 21.476168] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 -[ 21.476168] task: f5f83c00 ti: f5e28000 task.ti: f5e28000 -[ 21.476168] EIP: 0060:[<c1043177>] EFLAGS: 00010046 CPU: 2 -[ 21.476168] EIP is at process_one_work+0x29/0x31c -[ 21.484082] EAX: 00000000 EBX: f678b2a0 ECX: 00000004 EDX: 00000000 -[ 21.484082] ESI: f6c69940 EDI: f5e29ef0 EBP: f5e29f0c ESP: f5e29edc -[ 21.484082] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 -[ 21.484082] CR0: 80050033 CR2: 000000a4 CR3: 317ad000 CR4: 00040690 -[ 21.484082] Stack: -[ 21.484082] 00000000 f6c69950 00000000 f6c69940 c0042338 f5e29f0c c1327945 00000000 -[ 21.484082] 00000008 f678b2a0 f6c69940 f678b2b8 f5e29f30 c1043984 f5f83c00 f6c69970 -[ 21.484082] f678b2a0 c10437d3 f6775e80 f678b2a0 c10437d3 f5e29fac c1047059 f5e29f74 -[ 21.484082] Call Trace: -[ 21.484082] [<c1327945>] ? _raw_spin_lock_irq+0x28/0x30 -[ 21.484082] [<c1043984>] worker_thread+0x1b1/0x244 -[ 21.484082] [<c10437d3>] ? rescuer_thread+0x229/0x229 -[ 21.484082] [<c10437d3>] ? rescuer_thread+0x229/0x229 -[ 21.484082] [<c1047059>] kthread+0x8f/0x94 -[ 21.484082] [<c1327a32>] ? _raw_spin_unlock_irq+0x22/0x26 -[ 21.484082] [<c1327ee9>] ret_from_kernel_thread+0x21/0x38 -[ 21.484082] [<c1046fca>] ? kthread_parkme+0x19/0x19 -[ 21.496082] Code: 5d c3 55 89 e5 57 56 53 89 c3 83 ec 24 89 d0 89 55 e0 8d 7d e4 e8 6c d8 ff ff b9 04 00 00 00 89 45 d8 8b 43 24 89 45 dc 8b 45 d8 <8b> 40 04 8b 80 e0 00 00 00 c1 e8 05 24 01 88 45 d7 8b 45 e0 8d -[ 21.496082] EIP: [<c1043177>] process_one_work+0x29/0x31c SS:ESP 0068:f5e29edc -[ 21.496082] CR2: 0000000000000004 -[ 21.496082] ---[ end trace e362cc9cf10dae89 ]--- - -Reported-by: Andrew <nitr0@seti.kr.ua> -Fixes: 287f3a943fef ("pppoe: Use workqueue to die properly when a PADT is received") -Signed-off-by: Guillaume Nault <g.nault@alphalink.fr> -Signed-off-by: David S. Miller <davem@davemloft.net> ---- - ---- a/drivers/net/ppp/pppoe.c -+++ b/drivers/net/ppp/pppoe.c -@@ -550,6 +550,9 @@ static int pppoe_create(struct net *net, - sk->sk_family = PF_PPPOX; - sk->sk_protocol = PX_PROTO_OE; - -+ INIT_WORK(&pppox_sk(sk)->proto.pppoe.padt_work, -+ pppoe_unbind_sock_work); -+ - return 0; - } - -@@ -614,8 +617,6 @@ static int pppoe_connect(struct socket * - - lock_sock(sk); - -- INIT_WORK(&po->proto.pppoe.padt_work, pppoe_unbind_sock_work); -- - error = -EINVAL; - if (sp->sa_protocol != PX_PROTO_OE) - goto end; -@@ -645,8 +646,13 @@ static int pppoe_connect(struct socket * - po->pppoe_dev = NULL; - } - -- memset(sk_pppox(po) + 1, 0, -- sizeof(struct pppox_sock) - sizeof(struct sock)); -+ po->pppoe_ifindex = 0; -+ memset(&po->pppoe_pa, 0, sizeof(po->pppoe_pa)); -+ memset(&po->pppoe_relay, 0, sizeof(po->pppoe_relay)); -+ memset(&po->chan, 0, sizeof(po->chan)); -+ po->next = NULL; -+ po->num = 0; -+ - sk->sk_state = PPPOX_NONE; - } - |