netdev - [syzbot] BUG: unable to handle kernel paging request in cfg80211_inform_bss_frame

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Message-ID: <0000000000009f187905f1450d91@google.com>
Date:   Mon, 02 Jan 2023 02:02:47 -0800
From:   syzbot <syzbot+6b5032e139299571a3d1@...kaller.appspotmail.com>
To:     davem@...emloft.net, edumazet@...gle.com,
        johannes@...solutions.net, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, pabeni@...hat.com,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] BUG: unable to handle kernel paging request in cfg80211_inform_bss_frame_data

Hello,

syzbot found the following issue on:

HEAD commit:    a5541c0811a0 Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=15374118480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cbd4e584773e9397
dashboard link: https://syzkaller.appspot.com/bug?extid=6b5032e139299571a3d1
compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4b7702208fb9/disk-a5541c08.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9ec0153ec051/vmlinux-a5541c08.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6f8725ad290a/Image-a5541c08.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6b5032e139299571a3d1@...kaller.appspotmail.com

Unable to handle kernel paging request at virtual address 002e6f696b6c629f
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004
  CM = 0, WnR = 0
[002e6f696b6c629f] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4479 Comm: kworker/u4:21 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: phy15 ieee80211_iface_work
pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __kmem_cache_alloc_node+0x17c/0x350 mm/slub.c:3437
lr : slab_pre_alloc_hook mm/slab.h:712 [inline]
lr : slab_alloc_node mm/slub.c:3318 [inline]
lr : __kmem_cache_alloc_node+0x80/0x350 mm/slub.c:3437
sp : ffff800015e63890
x29: ffff800015e638a0 x28: ffff000124078000 x27: ffff0001238ab474
x26: ffff00010b9e3658 x25: 00000000ffffffff x24: ffff80000bc33670
x23: 0000000000000048 x22: 622e6f696b6c625f x21: 0000000000000000
x20: 0000000000000b20 x19: ffff0000c0001200 x18: 00000000000003a6
x17: 0000000000000075 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000005 x12: ffff80000d8f0a90
x11: 0000000000000001 x10: 0000000000000000 x9 : 0000000000000040
x8 : 0000000000387011 x7 : ffff80000bcf8a58 x6 : 0000000000000000
x5 : 0000000000000000 x4 : ffff80000bc33670 x3 : 0000000000387019
x2 : 0000000000000000 x1 : 0000000000000080 x0 : fffffc000317aa00
Call trace:
 next_tid mm/slub.c:2349 [inline]
 slab_alloc_node mm/slub.c:3382 [inline]
 __kmem_cache_alloc_node+0x17c/0x350 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc+0xb4/0x140 mm/slab_common.c:968
 kmalloc include/linux/slab.h:558 [inline]
 kzalloc include/linux/slab.h:689 [inline]
 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2471 [inline]
 cfg80211_inform_bss_frame_data+0x29c/0xc40 net/wireless/scan.c:2532
 ieee80211_bss_info_update+0x3f4/0x60c net/mac80211/scan.c:190
 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
 ieee80211_ibss_rx_queued_mgmt+0xb9c/0x1078 net/mac80211/ibss.c:1638
 ieee80211_iface_process_skb net/mac80211/iface.c:1630 [inline]
 ieee80211_iface_work+0x444/0x68c net/mac80211/iface.c:1684
 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
 worker_thread+0x340/0x610 kernel/workqueue.c:2436
 kthread+0x12c/0x158 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863
Code: 54000ee1 34000eeb b9402a69 91002103 (f8696ada) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	54000ee1 	b.ne	0x1dc  // b.any
   4:	34000eeb 	cbz	w11, 0x1e0
   8:	b9402a69 	ldr	w9, [x19, #40]
   c:	91002103 	add	x3, x8, #0x8
* 10:	f8696ada 	ldr	x26, [x22, x9] <-- trapping instruction


---
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