From: syzbot <syzbot+ff4b26b0bfbff2dc7960@syzkaller.appspotmail.com>
To: andreyknvl@google.com, davem@davemloft.net, kuba@kernel.org,
kvalo@codeaurora.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org, pkshih@realtek.com,
syzkaller-bugs@googlegroups.com
Subject: Re: KASAN: use-after-free Read in rtl_fw_do_work
Date: Wed, 19 Aug 2020 04:28:15 -0700 [thread overview]
Message-ID: <000000000000bbd1ff05ad394c92@google.com> (raw)
In-Reply-To: <0000000000008e983905ac9d0182@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: 28157b8c USB: Better name for __check_usb_generic()
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=1064697a900000
kernel config: https://syzkaller.appspot.com/x/.config?x=ccafc70ac3d5f49c
dashboard link: https://syzkaller.appspot.com/bug?extid=ff4b26b0bfbff2dc7960
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10f0a00e900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=162bc289900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ff4b26b0bfbff2dc7960@syzkaller.appspotmail.com
usb 6-1: Direct firmware load for rtlwifi/rtl8192cufw_TMSC.bin failed with error -2
usb 6-1: Direct firmware load for rtlwifi/rtl8192cufw.bin failed with error -2
==================================================================
BUG: KASAN: use-after-free in rtl_fw_do_work+0x407/0x430 drivers/net/wireless/realtek/rtlwifi/core.c:87
Read of size 8 at addr ffff8881ca9aff38 by task kworker/0:1/328
CPU: 0 PID: 328 Comm: kworker/0:1 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events request_firmware_work_func
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xf6/0x16e lib/dump_stack.c:118
print_address_description.constprop.0+0x1c/0x210 mm/kasan/report.c:383
__kasan_report mm/kasan/report.c:513 [inline]
kasan_report.cold+0x37/0x7c mm/kasan/report.c:530
rtl_fw_do_work+0x407/0x430 drivers/net/wireless/realtek/rtlwifi/core.c:87
request_firmware_work_func+0x126/0x250 drivers/base/firmware_loader/main.c:1001
process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x392/0x470 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
The buggy address belongs to the page:
page:00000000fcdef481 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ca9af
flags: 0x200000000000000()
raw: 0200000000000000 0000000000000000 ffffea00072a6bc8 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8881ca9afe00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881ca9afe80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881ca9aff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881ca9aff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881ca9b0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
prev parent reply other threads:[~2020-08-19 11:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-11 17:00 KASAN: use-after-free Read in rtl_fw_do_work syzbot
2020-08-19 11:28 ` syzbot [this message]
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