From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Tong Zhang <ztong0001@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 27/56] net: wan/lmc: unregister device when no matching device is found
Date: Mon, 5 Apr 2021 10:53:58 +0200 [thread overview]
Message-ID: <20210405085023.407712041@linuxfoundation.org> (raw)
In-Reply-To: <20210405085022.562176619@linuxfoundation.org>
From: Tong Zhang <ztong0001@gmail.com>
[ Upstream commit 62e69bc419772638369eff8ff81340bde8aceb61 ]
lmc set sc->lmc_media pointer when there is a matching device.
However, when no matching device is found, this pointer is NULL
and the following dereference will result in a null-ptr-deref.
To fix this issue, unregister the hdlc device and return an error.
[ 4.569359] BUG: KASAN: null-ptr-deref in lmc_init_one.cold+0x2b6/0x55d [lmc]
[ 4.569748] Read of size 8 at addr 0000000000000008 by task modprobe/95
[ 4.570102]
[ 4.570187] CPU: 0 PID: 95 Comm: modprobe Not tainted 5.11.0-rc7 #94
[ 4.570527] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-48-gd9c812dda519-preb4
[ 4.571125] Call Trace:
[ 4.571261] dump_stack+0x7d/0xa3
[ 4.571445] kasan_report.cold+0x10c/0x10e
[ 4.571667] ? lmc_init_one.cold+0x2b6/0x55d [lmc]
[ 4.571932] lmc_init_one.cold+0x2b6/0x55d [lmc]
[ 4.572186] ? lmc_mii_readreg+0xa0/0xa0 [lmc]
[ 4.572432] local_pci_probe+0x6f/0xb0
[ 4.572639] pci_device_probe+0x171/0x240
[ 4.572857] ? pci_device_remove+0xe0/0xe0
[ 4.573080] ? kernfs_create_link+0xb6/0x110
[ 4.573315] ? sysfs_do_create_link_sd.isra.0+0x76/0xe0
[ 4.573598] really_probe+0x161/0x420
[ 4.573799] driver_probe_device+0x6d/0xd0
[ 4.574022] device_driver_attach+0x82/0x90
[ 4.574249] ? device_driver_attach+0x90/0x90
[ 4.574485] __driver_attach+0x60/0x100
[ 4.574694] ? device_driver_attach+0x90/0x90
[ 4.574931] bus_for_each_dev+0xe1/0x140
[ 4.575146] ? subsys_dev_iter_exit+0x10/0x10
[ 4.575387] ? klist_node_init+0x61/0x80
[ 4.575602] bus_add_driver+0x254/0x2a0
[ 4.575812] driver_register+0xd3/0x150
[ 4.576021] ? 0xffffffffc0018000
[ 4.576202] do_one_initcall+0x84/0x250
[ 4.576411] ? trace_event_raw_event_initcall_finish+0x150/0x150
[ 4.576733] ? unpoison_range+0xf/0x30
[ 4.576938] ? ____kasan_kmalloc.constprop.0+0x84/0xa0
[ 4.577219] ? unpoison_range+0xf/0x30
[ 4.577423] ? unpoison_range+0xf/0x30
[ 4.577628] do_init_module+0xf8/0x350
[ 4.577833] load_module+0x3fe6/0x4340
[ 4.578038] ? vm_unmap_ram+0x1d0/0x1d0
[ 4.578247] ? ____kasan_kmalloc.constprop.0+0x84/0xa0
[ 4.578526] ? module_frob_arch_sections+0x20/0x20
[ 4.578787] ? __do_sys_finit_module+0x108/0x170
[ 4.579037] __do_sys_finit_module+0x108/0x170
[ 4.579278] ? __ia32_sys_init_module+0x40/0x40
[ 4.579523] ? file_open_root+0x200/0x200
[ 4.579742] ? do_sys_open+0x85/0xe0
[ 4.579938] ? filp_open+0x50/0x50
[ 4.580125] ? exit_to_user_mode_prepare+0xfc/0x130
[ 4.580390] do_syscall_64+0x33/0x40
[ 4.580586] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 4.580859] RIP: 0033:0x7f1a724c3cf7
[ 4.581054] Code: 48 89 57 30 48 8b 04 24 48 89 47 38 e9 1d a0 02 00 48 89 f8 48 89 f7 48 89 d6 48 891
[ 4.582043] RSP: 002b:00007fff44941c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 4.582447] RAX: ffffffffffffffda RBX: 00000000012ada70 RCX: 00007f1a724c3cf7
[ 4.582827] RDX: 0000000000000000 RSI: 00000000012ac9e0 RDI: 0000000000000003
[ 4.583207] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
[ 4.583587] R10: 00007f1a72527300 R11: 0000000000000246 R12: 00000000012ac9e0
[ 4.583968] R13: 0000000000000000 R14: 00000000012acc90 R15: 0000000000000001
[ 4.584349] ==================================================================
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wan/lmc/lmc_main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/wan/lmc/lmc_main.c b/drivers/net/wan/lmc/lmc_main.c
index 4907453f17f5..937f56d0a31d 100644
--- a/drivers/net/wan/lmc/lmc_main.c
+++ b/drivers/net/wan/lmc/lmc_main.c
@@ -915,6 +915,8 @@ static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
break;
default:
printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
+ unregister_hdlc_device(dev);
+ return -EIO;
break;
}
--
2.30.1
next prev parent reply other threads:[~2021-04-05 9:02 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-05 8:53 [PATCH 4.19 00/56] 4.19.185-rc1 review Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 01/56] selinux: vsock: Set SID for socket returned by accept() Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 02/56] tcp: relookup sock for RST+ACK packets handled by obsolete req sock Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 03/56] ipv6: weaken the v4mapped source check Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 04/56] ext4: fix bh ref count on error paths Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 05/56] rpc: fix NULL dereference on kmalloc failure Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 06/56] ASoC: rt5640: Fix dac- and adc- vol-tlv values being off by a factor of 10 Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 07/56] ASoC: rt5651: " Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 08/56] ASoC: sgtl5000: set DAP_AVC_CTRL register to correct default value on probe Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 09/56] ASoC: es8316: Simplify adc_pga_gain_tlv table Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 10/56] ASoC: cs42l42: Fix Bitclock polarity inversion Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 11/56] ASoC: cs42l42: Fix channel width support Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 12/56] ASoC: cs42l42: Fix mixer volume control Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 13/56] ASoC: cs42l42: Always wait at least 3ms after reset Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 14/56] vhost: Fix vhost_vq_reset() Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 15/56] scsi: st: Fix a use after free in st_open() Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 16/56] scsi: qla2xxx: Fix broken #endif placement Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 17/56] staging: comedi: cb_pcidas: fix request_irq() warn Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 18/56] staging: comedi: cb_pcidas64: " Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 19/56] ASoC: rt5659: Update MCLK rate in set_sysclk() Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 20/56] thermal/core: Add NULL pointer check before using cooling device stats Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 21/56] locking/ww_mutex: Simplify use_ww_ctx & ww_ctx handling Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 22/56] ext4: do not iput inode under running transaction in ext4_rename() Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 23/56] brcmfmac: clear EAP/association status bits on linkdown events Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 24/56] ath10k: hold RCU lock when calling ieee80211_find_sta_by_ifaddr() Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 25/56] net: ethernet: aquantia: Handle error cleanup of start on open Greg Kroah-Hartman
2021-04-05 8:53 ` [PATCH 4.19 26/56] appletalk: Fix skb allocation size in loopback case Greg Kroah-Hartman
2021-04-05 8:53 ` Greg Kroah-Hartman [this message]
2021-04-05 8:53 ` [PATCH 4.19 28/56] bpf: Remove MTU check in __bpf_skb_max_len Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 29/56] ALSA: usb-audio: Apply sample rate quirk to Logitech Connect Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 30/56] ALSA: hda/realtek: fix a determine_headset_type issue for a Dell AIO Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 31/56] ALSA: hda/realtek: call alc_update_headset_mode() in hp_automute_hook Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 32/56] PM: runtime: Fix race getting/putting suppliers at probe Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 33/56] PM: runtime: Fix ordering in pm_runtime_get_suppliers() Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 34/56] tracing: Fix stack trace event size Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 35/56] mm: fix race by making init_zero_pfn() early_initcall Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 36/56] drm/amdgpu: fix offset calculation in amdgpu_vm_bo_clear_mappings() Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 37/56] drm/amdgpu: check alignment on CPU page for bo map Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 38/56] reiserfs: update reiserfs_xattrs_initialized() condition Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 39/56] pinctrl: rockchip: fix restore error in resume Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 40/56] extcon: Add stubs for extcon_register_notifier_all() functions Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 41/56] extcon: Fix error handling in extcon_dev_register Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 42/56] firewire: nosy: Fix a use-after-free bug in nosy_ioctl() Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 43/56] usbip: vhci_hcd fix shift out-of-bounds in vhci_hub_control() Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 44/56] USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 45/56] usb: musb: Fix suspend with devices connected for a64 Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 46/56] usb: xhci-mtk: fix broken streams issue on 0.96 xHCI Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 47/56] cdc-acm: fix BREAK rx code path adding necessary calls Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 48/56] USB: cdc-acm: untangle a circular dependency between callback and softint Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 49/56] USB: cdc-acm: downgrade message to debug Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 50/56] USB: cdc-acm: fix double free on probe failure Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 51/56] USB: cdc-acm: fix use-after-free after " Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 52/56] usb: gadget: udc: amd5536udc_pci fix null-ptr-dereference Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 53/56] usb: dwc2: Fix HPRT0.PrtSusp bit setting for HiKey 960 board Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 54/56] staging: rtl8192e: Fix incorrect source in memcpy() Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 55/56] staging: rtl8192e: Change state information from u16 to u8 Greg Kroah-Hartman
2021-04-05 8:54 ` [PATCH 4.19 56/56] drivers: video: fbcon: fix NULL dereference in fbcon_cursor() Greg Kroah-Hartman
2021-04-05 17:57 ` [PATCH 4.19 00/56] 4.19.185-rc1 review Guenter Roeck
2021-04-06 0:28 ` Shuah Khan
2021-04-06 4:02 ` Naresh Kamboju
2021-04-07 2:05 ` Samuel Zou
2021-04-07 8:21 ` Jon Hunter
2021-04-07 8:23 ` Pavel Machek
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