From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, DaeRyong Jeong <threeearcat@gmail.com>,
Sasha Levin <alexander.levin@microsoft.com>
Subject: [PATCH 4.4 064/124] tty: Fix data race in tty_insert_flip_string_fixed_flag
Date: Sat, 4 Aug 2018 11:00:53 +0200 [thread overview]
Message-ID: <20180804082704.898693705@linuxfoundation.org> (raw)
In-Reply-To: <20180804082702.434482435@linuxfoundation.org>
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: DaeRyong Jeong <threeearcat@gmail.com>
[ Upstream commit b6da31b2c07c46f2dcad1d86caa835227a16d9ff ]
Unlike normal serials, in pty layer, there is no guarantee that multiple
threads don't insert input characters at the same time. If it is happened,
tty_insert_flip_string_fixed_flag can be executed concurrently. This can
lead slab out-of-bounds write in tty_insert_flip_string_fixed_flag.
Call sequences are as follows.
CPU0 CPU1
n_tty_ioctl_helper n_tty_ioctl_helper
__start_tty tty_send_xchar
tty_wakeup pty_write
n_hdlc_tty_wakeup tty_insert_flip_string
n_hdlc_send_frames tty_insert_flip_string_fixed_flag
pty_write
tty_insert_flip_string
tty_insert_flip_string_fixed_flag
To fix the race, acquire port->lock in pty_write() before it inserts input
characters to tty buffer. It prevents multiple threads from inserting
input characters concurrently.
The crash log is as follows:
BUG: KASAN: slab-out-of-bounds in tty_insert_flip_string_fixed_flag+0xb5/
0x130 drivers/tty/tty_buffer.c:316 at addr ffff880114fcc121
Write of size 1792 by task syz-executor0/30017
CPU: 1 PID: 30017 Comm: syz-executor0 Not tainted 4.8.0 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS rel-1.8.2-0-g33fbe13 by qemu-project.org 04/01/2014
0000000000000000 ffff88011638f888 ffffffff81694cc3 ffff88007d802140
ffff880114fcb300 ffff880114fcc300 ffff880114fcb300 ffff88011638f8b0
ffffffff8130075c ffff88011638f940 ffff88007d802140 ffff880194fcc121
Call Trace:
__dump_stack lib/dump_stack.c:15 [inline]
dump_stack+0xb3/0x110 lib/dump_stack.c:51
kasan_object_err+0x1c/0x70 mm/kasan/report.c:156
print_address_description mm/kasan/report.c:194 [inline]
kasan_report_error+0x1f7/0x4e0 mm/kasan/report.c:283
kasan_report+0x36/0x40 mm/kasan/report.c:303
check_memory_region_inline mm/kasan/kasan.c:292 [inline]
check_memory_region+0x13e/0x1a0 mm/kasan/kasan.c:299
memcpy+0x37/0x50 mm/kasan/kasan.c:335
tty_insert_flip_string_fixed_flag+0xb5/0x130 drivers/tty/tty_buffer.c:316
tty_insert_flip_string include/linux/tty_flip.h:35 [inline]
pty_write+0x7f/0xc0 drivers/tty/pty.c:115
n_hdlc_send_frames+0x1d4/0x3b0 drivers/tty/n_hdlc.c:419
n_hdlc_tty_wakeup+0x73/0xa0 drivers/tty/n_hdlc.c:496
tty_wakeup+0x92/0xb0 drivers/tty/tty_io.c:601
__start_tty.part.26+0x66/0x70 drivers/tty/tty_io.c:1018
__start_tty+0x34/0x40 drivers/tty/tty_io.c:1013
n_tty_ioctl_helper+0x146/0x1e0 drivers/tty/tty_ioctl.c:1138
n_hdlc_tty_ioctl+0xb3/0x2b0 drivers/tty/n_hdlc.c:794
tty_ioctl+0xa85/0x16d0 drivers/tty/tty_io.c:2992
vfs_ioctl fs/ioctl.c:43 [inline]
do_vfs_ioctl+0x13e/0xba0 fs/ioctl.c:679
SYSC_ioctl fs/ioctl.c:694 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
entry_SYSCALL_64_fastpath+0x1f/0xbd
Signed-off-by: DaeRyong Jeong <threeearcat@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/pty.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -106,16 +106,19 @@ static void pty_unthrottle(struct tty_st
static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c)
{
struct tty_struct *to = tty->link;
+ unsigned long flags;
if (tty->stopped)
return 0;
if (c > 0) {
+ spin_lock_irqsave(&to->port->lock, flags);
/* Stuff the data into the input queue of the other end */
c = tty_insert_flip_string(to->port, buf, c);
/* And shovel */
if (c)
tty_flip_buffer_push(to->port);
+ spin_unlock_irqrestore(&to->port->lock, flags);
}
return c;
}
next prev parent reply other threads:[~2018-08-04 9:10 UTC|newest]
Thread overview: 144+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-04 8:59 [PATCH 4.4 000/124] 4.4.146-stable review Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 001/124] MIPS: Fix off-by-one in pci_resource_to_user() Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 002/124] Input: elan_i2c - add ACPI ID for lenovo ideapad 330 Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 003/124] Input: i8042 - add Lenovo LaVie Z to the i8042 reset list Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 004/124] Input: elan_i2c - add another ACPI ID for Lenovo Ideapad 330-15AST Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 005/124] tracing: Fix double free of event_trigger_data Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 006/124] tracing: Fix possible double free in event_enable_trigger_func() Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 007/124] tracing/kprobes: Fix trace_probe flags on enable_trace_kprobe() failure Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 008/124] tracing: Quiet gcc warning about maybe unused link variable Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 009/124] xen/netfront: raise max number of slots in xennet_get_responses() Greg Kroah-Hartman
2018-08-04 8:59 ` [PATCH 4.4 010/124] ALSA: emu10k1: add error handling for snd_ctl_add Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 011/124] ALSA: fm801: " Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 012/124] nfsd: fix potential use-after-free in nfsd4_decode_getdeviceinfo Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 013/124] mm: vmalloc: avoid racy handling of debugobjects in vunmap Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 014/124] mm/slub.c: add __printf verification to slab_err() Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 015/124] rtc: ensure rtc_set_alarm fails when alarms are not supported Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 016/124] netfilter: ipset: List timing out entries with "timeout 1" instead of zero Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 017/124] infiniband: fix a possible use-after-free bug Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 018/124] hvc_opal: dont set tb_ticks_per_usec in udbg_init_opal_common() Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 019/124] powerpc/64s: Fix compiler store ordering to SLB shadow area Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 020/124] RDMA/mad: Convert BUG_ONs to error flows Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 021/124] disable loading f2fs module on PAGE_SIZE > 4KB Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 022/124] f2fs: fix to dont trigger writeback during recovery Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 023/124] usbip: usbip_detach: Fix memory, udev context and udev leak Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 024/124] perf/x86/intel/uncore: Correct fixed counter index check in generic code Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 025/124] perf/x86/intel/uncore: Correct fixed counter index check for NHM Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 026/124] iwlwifi: pcie: fix race in Rx buffer allocator Greg Kroah-Hartman
2018-09-05 18:39 ` Ben Hutchings
2018-08-04 9:00 ` [PATCH 4.4 027/124] Bluetooth: hci_qca: Fix "Sleep inside atomic section" warning Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 028/124] Bluetooth: btusb: Add a new Realtek 8723DE ID 2ff8:b011 Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 029/124] ASoC: dpcm: fix BE dai not hw_free and shutdown Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 030/124] mfd: cros_ec: Fail early if we cannot identify the EC Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 031/124] mwifiex: handle race during mwifiex_usb_disconnect Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 032/124] wlcore: sdio: check for valid platform device data before suspend Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 033/124] media: videobuf2-core: dont call memop finish when queueing Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 034/124] btrfs: add barriers to btrfs_sync_log before log_commit_wait wakeups Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 035/124] btrfs: qgroup: Finish rescan when hit the last leaf of extent tree Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 036/124] PCI: Prevent sysfs disable of device while driver is attached Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 037/124] ath: Add regulatory mapping for FCC3_ETSIC Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 038/124] ath: Add regulatory mapping for ETSI8_WORLD Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 039/124] ath: Add regulatory mapping for APL13_WORLD Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 040/124] ath: Add regulatory mapping for APL2_FCCA Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 041/124] ath: Add regulatory mapping for Uganda Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 042/124] ath: Add regulatory mapping for Tanzania Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 043/124] ath: Add regulatory mapping for Serbia Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 044/124] ath: Add regulatory mapping for Bermuda Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 045/124] ath: Add regulatory mapping for Bahamas Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 050/124] powerpc/8xx: fix invalid register expression in head_8xx.S Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 051/124] pinctrl: at91-pio4: add missing of_node_put Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 052/124] PCI: pciehp: Request control of native hotplug only if supported Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 053/124] mwifiex: correct histogram data with appropriate index Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 054/124] scsi: ufs: fix exception event handling Greg Kroah-Hartman
2018-09-05 19:11 ` Ben Hutchings
2018-08-04 9:00 ` [PATCH 4.4 055/124] ALSA: emu10k1: Rate-limit error messages about page errors Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 056/124] regulator: pfuze100: add .is_enable() for pfuze100_swb_regulator_ops Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 057/124] md: fix NULL dereference of mddev->pers in remove_and_add_spares() Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 058/124] media: smiapp: fix timeout checking in smiapp_read_nvm Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 059/124] ALSA: usb-audio: Apply rate limit to warning messages in URB complete callback Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 060/124] HID: hid-plantronics: Re-resend Update to map button for PTT products Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 061/124] drm/radeon: fix mode_valids return type Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 063/124] HID: i2c-hid: check if device is there before really probing Greg Kroah-Hartman
2018-08-04 9:00 ` Greg Kroah-Hartman [this message]
2018-08-04 9:00 ` [PATCH 4.4 066/124] media: rcar_jpu: Add missing clk_disable_unprepare() on error in jpu_open() Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 067/124] libata: Fix command retry decision Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 068/124] media: saa7164: Fix driver name in debug output Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 069/124] mtd: rawnand: fsl_ifc: fix FSL NAND driver to read all ONFI parameter pages Greg Kroah-Hartman
2018-08-04 9:00 ` [PATCH 4.4 070/124] brcmfmac: Add support for bcm43364 wireless chipset Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 071/124] s390/cpum_sf: Add data entry sizes to sampling trailer entry Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 072/124] perf: fix invalid bit in diagnostic entry Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 073/124] scsi: 3w-9xxx: fix a missing-check bug Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 074/124] scsi: 3w-xxxx: " Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 075/124] scsi: megaraid: silence a static checker bug Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 076/124] thermal: exynos: fix setting rising_threshold for Exynos5433 Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 077/124] bpf: fix references to free_bpf_prog_info() in comments Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 078/124] media: siano: get rid of __le32/__le16 cast warnings Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 079/124] drm/atomic: Handling the case when setting old crtc for plane Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 080/124] ALSA: hda/ca0132: fix build failure when a local macro is defined Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 081/124] memory: tegra: Do not handle spurious interrupts Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 082/124] memory: tegra: Apply interrupts mask per SoC Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 083/124] drm/gma500: fix psb_intel_lvds_mode_valid()s return type Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 084/124] ipconfig: Correctly initialise ic_nameservers Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 085/124] rsi: Fix invalid vdd warning in mmc Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 087/124] microblaze: Fix simpleImage format generation Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 088/124] usb: hub: Dont wait for connect state at resume for powered-off ports Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 089/124] crypto: authencesn - dont leak pointers to authenc keys Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 090/124] crypto: authenc " Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 091/124] media: omap3isp: fix unbalanced dma_iommu_mapping Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 092/124] scsi: scsi_dh: replace too broad "TP9" string with the exact models Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 093/124] scsi: megaraid_sas: Increase timeout by 1 sec for non-RAID fastpath IOs Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 094/124] media: si470x: fix __be16 annotations Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 096/124] random: mix rdrand with entropy sent in from userspace Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 097/124] squashfs: be more careful about metadata corruption Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 098/124] ext4: fix inline data updates with checksums enabled Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 099/124] ext4: check for allocation block validity with block group locked Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 100/124] dmaengine: pxa_dma: remove duplicate const qualifier Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 101/124] ASoC: pxa: Fix module autoload for platform drivers Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 102/124] ipv4: remove BUG_ON() from fib_compute_spec_dst Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 103/124] net: fix amd-xgbe flow-control issue Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 104/124] net: lan78xx: fix rx handling before first packet is send Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 105/124] xen-netfront: wait xenbus state change when load module manually Greg Kroah-Hartman
2018-09-07 0:21 ` Ben Hutchings
2018-09-07 17:27 ` Boris Ostrovsky
2018-09-11 18:16 ` Ben Hutchings
2018-08-04 9:01 ` [PATCH 4.4 106/124] netlink: Do not subscribe to non-existent groups Greg Kroah-Hartman
2018-08-04 18:07 ` Nathan Chancellor
2018-08-04 22:33 ` Dmitry Safonov
2018-08-04 22:49 ` Nathan Chancellor
2018-08-04 23:12 ` Dmitry Safonov
2018-08-04 23:21 ` Nathan Chancellor
2018-08-04 23:25 ` David Miller
2018-08-04 23:26 ` Dmitry Safonov
2018-08-04 23:33 ` David Miller
2018-08-04 23:44 ` Dmitry Safonov
2018-08-04 23:50 ` Dmitry Safonov
2018-08-05 0:07 ` David Miller
2018-08-04 23:47 ` Dmitry Safonov
2018-08-05 0:08 ` David Miller
2018-08-05 14:03 ` Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 107/124] netlink: Dont shift with UB on nlk->ngroups Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 108/124] NET: stmmac: align DMA stuff to largest cache line length Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 109/124] tcp: do not force quickack when receiving out-of-order packets Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 110/124] tcp: add max_quickacks param to tcp_incr_quickack and tcp_enter_quickack_mode Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 111/124] tcp: do not aggressively quick ack after ECN events Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 112/124] tcp: refactor tcp_ecn_check_ce to remove sk type cast Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 113/124] tcp: add one more quick ack after after ECN events Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 114/124] inet: frag: enforce memory limits earlier Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 115/124] net: dsa: Do not suspend/resume closed slave_dev Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 116/124] netlink: Fix spectre v1 gadget in netlink_create() Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 117/124] squashfs: more metadata hardening Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 119/124] can: ems_usb: Fix memory leak on ems_usb_disconnect() Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 120/124] net: socket: fix potential spectre v1 gadget in socketcall Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 121/124] virtio_balloon: fix another race between migration and ballooning Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 122/124] kvm: x86: vmx: fix vpid leak Greg Kroah-Hartman
2018-08-04 9:01 ` [PATCH 4.4 123/124] crypto: padlock-aes - Fix Nano workaround data corruption Greg Kroah-Hartman
2018-09-07 1:54 ` Ben Hutchings
2018-08-04 9:01 ` [PATCH 4.4 124/124] scsi: sg: fix minor memory leak in error path Greg Kroah-Hartman
2018-08-04 9:29 ` [PATCH 4.4 000/124] 4.4.146-stable review Nathan Chancellor
2018-08-04 14:47 ` Guenter Roeck
2018-08-05 11:54 ` Naresh Kamboju
2018-08-05 13:49 ` Greg Kroah-Hartman
2018-08-05 14:41 ` Guenter Roeck
2018-08-05 15:19 ` Dan Rue
2018-08-06 15:35 ` Greg Kroah-Hartman
2018-08-08 0:00 ` Anmar Oueja
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