From: syzbot <syzbot+1853daab1a47603d4678@syzkaller.appspotmail.com>
To: david@ixit.cz, krzk@kernel.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, netdev@vger.kernel.org,
oe-linux-nfc@lists.linux.dev, syzkaller-bugs@googlegroups.com
Subject: [syzbot] [usb?] [nfc?] KASAN: use-after-free Read in pn533_acr122_is_rx_frame_valid
Date: Sat, 05 Sep 2026 07:00:31 -0700 [thread overview]
Message-ID: <6a9c207f.a6639fcc.23b8b0.0002.GAE@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: edc1518454f6 usb: typec: hd3ss3220: Add support for supply..
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=14f27215580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c451f9f64434b622
dashboard link: https://syzkaller.appspot.com/bug?extid=1853daab1a47603d4678
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15de68f9580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12c86b49580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7b8a8fc7809a/disk-edc15184.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6ff1ab9249a0/vmlinux-edc15184.xz
kernel image: https://storage.googleapis.com/syzbot-assets/249551c4918b/bzImage-edc15184.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1853daab1a47603d4678@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in pn533_acr122_is_rx_frame_valid drivers/nfc/pn533/usb.c:325 [inline]
BUG: KASAN: use-after-free in pn533_acr122_is_rx_frame_valid+0x132/0x150 drivers/nfc/pn533/usb.c:315
Read of size 1 at addr ffff88816b5da3ce by task swapper/0/0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x13d/0x4b0 mm/kasan/report.c:482
kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
pn533_acr122_is_rx_frame_valid drivers/nfc/pn533/usb.c:325 [inline]
pn533_acr122_is_rx_frame_valid+0x132/0x150 drivers/nfc/pn533/usb.c:315
pn533_recv_frame+0x1b7/0x6d0 drivers/nfc/pn533/pn533.c:2203
__usb_hcd_giveback_urb+0x38e/0x610 drivers/usb/core/hcd.c:1657
usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
dummy_timer+0xdb2/0x3700 drivers/usb/gadget/udc/dummy_hcd.c:2019
__run_hrtimer kernel/time/hrtimer.c:2067 [inline]
__hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2124
hrtimer_run_softirq+0x1ca/0x360 kernel/time/hrtimer.c:2141
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x192/0x210 kernel/softirq.c:767
irq_exit_rcu+0x9/0x30 kernel/softirq.c:784
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: bf c3 01 e9 43 fa 02 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d e3 ff 1e 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff89607d00 EFLAGS: 00000242
RAX: 000000000009c36b RBX: ffffffff8962c940 RCX: ffffffff878789d5
RDX: 0000000000000001 RSI: ffffffff89327d4e RDI: ffffffff87d2a600
RBP: fffffbfff12c5928 R08: 0000000000000001 R09: ffffed103eac673d
R10: ffff8881f56339eb R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffffffff12c0fa4 R15: dffffc0000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:768
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x3ae/0x5b0 kernel/sched/idle.c:355
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:454
rest_init+0x2d3/0x2e0 init/main.c:727
start_kernel+0x489/0x490 init/main.c:1185
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x158
</TASK>
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b5da
flags: 0x200000000000000(node=0|zone=2)
raw: 0200000000000000 ffffea0005ad7688 ffffea0005ad7688 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)
Memory state around the buggy address:
ffff88816b5da280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff88816b5da300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88816b5da380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff88816b5da400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff88816b5da480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
----------------
Code disassembly (best guess):
0: bf c3 01 e9 43 mov $0x43e901c3,%edi
5: fa cli
6: 02 00 add (%rax),%al
8: 0f 1f 00 nopl (%rax)
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: f3 0f 1e fa endbr64
1f: 66 90 xchg %ax,%ax
21: 0f 00 2d e3 ff 1e 00 verw 0x1effe3(%rip) # 0x1f000b
28: fb sti
29: f4 hlt
* 2a: c3 ret <-- trapping instruction
2b: cc int3
2c: cc int3
2d: cc int3
2e: cc int3
2f: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
36: 00 00 00
39: 66 90 xchg %ax,%ax
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
reply other threads:[~2026-09-05 14:00 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6a9c207f.a6639fcc.23b8b0.0002.GAE@google.com \
--to=syzbot+1853daab1a47603d4678@syzkaller.appspotmail.com \
--cc=david@ixit.cz \
--cc=krzk@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=oe-linux-nfc@lists.linux.dev \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.