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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Markus Theil <markus.theil@tu-ilmenau.de>,
	syzbot+93976391bf299d425f44@syzkaller.appspotmail.com,
	Johannes Berg <johannes.berg@intel.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.11 13/38] mac80211: fix double free in ibss_leave
Date: Mon, 29 Mar 2021 18:21:08 -0400	[thread overview]
Message-ID: <20210329222133.2382393-13-sashal@kernel.org> (raw)
In-Reply-To: <20210329222133.2382393-1-sashal@kernel.org>

From: Markus Theil <markus.theil@tu-ilmenau.de>

[ Upstream commit 3bd801b14e0c5d29eeddc7336558beb3344efaa3 ]

Clear beacon ie pointer and ie length after free
in order to prevent double free.

==================================================================
BUG: KASAN: double-free or invalid-free \
in ieee80211_ibss_leave+0x83/0xe0 net/mac80211/ibss.c:1876

CPU: 0 PID: 8472 Comm: syz-executor100 Not tainted 5.11.0-rc6-syzkaller #0
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2c6 mm/kasan/report.c:230
 kasan_report_invalid_free+0x51/0x80 mm/kasan/report.c:355
 ____kasan_slab_free+0xcc/0xe0 mm/kasan/common.c:341
 kasan_slab_free include/linux/kasan.h:192 [inline]
 __cache_free mm/slab.c:3424 [inline]
 kfree+0xed/0x270 mm/slab.c:3760
 ieee80211_ibss_leave+0x83/0xe0 net/mac80211/ibss.c:1876
 rdev_leave_ibss net/wireless/rdev-ops.h:545 [inline]
 __cfg80211_leave_ibss+0x19a/0x4c0 net/wireless/ibss.c:212
 __cfg80211_leave+0x327/0x430 net/wireless/core.c:1172
 cfg80211_leave net/wireless/core.c:1221 [inline]
 cfg80211_netdev_notifier_call+0x9e8/0x12c0 net/wireless/core.c:1335
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2040
 call_netdevice_notifiers_extack net/core/dev.c:2052 [inline]
 call_netdevice_notifiers net/core/dev.c:2066 [inline]
 __dev_close_many+0xee/0x2e0 net/core/dev.c:1586
 __dev_close net/core/dev.c:1624 [inline]
 __dev_change_flags+0x2cb/0x730 net/core/dev.c:8476
 dev_change_flags+0x8a/0x160 net/core/dev.c:8549
 dev_ifsioc+0x210/0xa70 net/core/dev_ioctl.c:265
 dev_ioctl+0x1b1/0xc40 net/core/dev_ioctl.c:511
 sock_do_ioctl+0x148/0x2d0 net/socket.c:1060
 sock_ioctl+0x477/0x6a0 net/socket.c:1177
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported-by: syzbot+93976391bf299d425f44@syzkaller.appspotmail.com
Signed-off-by: Markus Theil <markus.theil@tu-ilmenau.de>
Link: https://lore.kernel.org/r/20210213133653.367130-1-markus.theil@tu-ilmenau.de
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/mac80211/ibss.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 1f552f374e97..a7ac53a2f00d 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -1874,6 +1874,8 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 
 	/* remove beacon */
 	kfree(sdata->u.ibss.ie);
+	sdata->u.ibss.ie = NULL;
+	sdata->u.ibss.ie_len = 0;
 
 	/* on the next join, re-program HT parameters */
 	memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa));
-- 
2.30.1


  parent reply	other threads:[~2021-03-29 22:23 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-29 22:20 [PATCH AUTOSEL 5.11 01/38] ARM: dts: am33xx: add aliases for mmc interfaces Sasha Levin
2021-03-29 22:20 ` [PATCH AUTOSEL 5.11 02/38] bus: ti-sysc: Fix warning on unbind if reset is not deasserted Sasha Levin
2021-03-29 22:20 ` [PATCH AUTOSEL 5.11 03/38] drm/msm: a6xx: Make sure the SQE microcode is safe Sasha Levin
2021-03-29 22:20 ` [PATCH AUTOSEL 5.11 04/38] platform/x86: intel-hid: Support Lenovo ThinkPad X1 Tablet Gen 2 Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 05/38] bpf, x86: Use kvmalloc_array instead kmalloc_array in bpf_jit_comp Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 06/38] net/mlx5e: Enforce minimum value check for ICOSQ size Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 07/38] net: pxa168_eth: Fix a potential data race in pxa168_eth_remove Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 08/38] kunit: tool: Fix a python tuple typing error Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 09/38] mISDN: fix crash in fritzpci Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 10/38] net: correct sk_acceptq_is_full() Sasha Levin
2021-03-31 16:17   ` Eric Dumazet
2021-04-01  2:56     ` Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 11/38] net: arcnet: com20020 fix error handling Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 12/38] can: kvaser_usb: Add support for USBcan Pro 4xHS Sasha Levin
2021-03-29 22:21 ` Sasha Levin [this message]
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 14/38] mac80211: Check crypto_aead_encrypt for errors Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 15/38] mac80211: choose first enabled channel for monitor Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 16/38] drm/msm/dsi_pll_7nm: Fix variable usage for pll_lockdet_rate Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 17/38] drm/msm/adreno: a5xx_power: Don't apply A540 lm_setup to other GPUs Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 18/38] drm/msm: Ratelimit invalid-fence message Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 19/38] netfilter: conntrack: Fix gre tunneling over ipv6 Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 20/38] netfilter: nftables: skip hook overlap logic if flowtable is stale Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 21/38] net: ipa: fix init header command validation Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 22/38] platform/x86: thinkpad_acpi: Allow the FnLock LED to change state Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 23/38] kselftest/arm64: sve: Do not use non-canonical FFR register value Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 24/38] drm/msm/disp/dpu1: icc path needs to be set before dpu runtime resume Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 25/38] x86/build: Turn off -fcf-protection for realmode targets Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 26/38] block: clear GD_NEED_PART_SCAN later in bdev_disk_changed Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 27/38] platform/x86: intel_pmt_class: Initial resource to 0 Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 28/38] platform/x86: intel_pmc_core: Ignore GBE LTR on Tiger Lake platforms Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 29/38] ptp_qoriq: fix overflow in ptp_qoriq_adjfine() u64 calcalation Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 30/38] scsi: target: pscsi: Clean up after failure in pscsi_map_sg() Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 31/38] arm64: kernel: disable CNP on Carmel Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 32/38] selftests/vm: fix out-of-tree build Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 33/38] ia64: mca: allocate early mca with GFP_ATOMIC Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 34/38] ia64: fix format strings for err_inject Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 35/38] cifs: revalidate mapping when we open files for SMB1 POSIX Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 36/38] cifs: Silently ignore unknown oplock break handle Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 37/38] io_uring: fix timeout cancel return code Sasha Levin
2021-03-29 22:21 ` [PATCH AUTOSEL 5.11 38/38] math: Export mul_u64_u64_div_u64 Sasha Levin

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