linux-kernel - [syzbot] [net?] [nfc?] KMSAN: uninit-value in nci_rsp

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Message-ID: <0000000000006d31170610121646@google.com>
Date: Mon, 29 Jan 2024 01:15:31 -0800
From: syzbot <syzbot+685805de744584f4d24b@...kaller.appspotmail.com>
To: davem@...emloft.net, edumazet@...gle.com, krzysztof.kozlowski@...aro.org, 
	kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
	pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [net?] [nfc?] KMSAN: uninit-value in nci_rsp_packet

Hello,

syzbot found the following issue on:

HEAD commit:    9f8413c4a66f Merge tag 'cgroup-for-6.8' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=154b0f30180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=656820e61b758b15
dashboard link: https://syzkaller.appspot.com/bug?extid=685805de744584f4d24b
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/79d9f2f4b065/disk-9f8413c4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cbc68430d9c6/vmlinux-9f8413c4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9740ad9fc172/bzImage-9f8413c4.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+685805de744584f4d24b@...kaller.appspotmail.com

=====================================================
BUG: KMSAN: uninit-value in nci_core_init_rsp_packet_v2 net/nfc/nci/rsp.c:107 [inline]
BUG: KMSAN: uninit-value in nci_core_init_rsp_packet net/nfc/nci/rsp.c:131 [inline]
BUG: KMSAN: uninit-value in nci_rsp_packet+0x294d/0x29a0 net/nfc/nci/rsp.c:376
 nci_core_init_rsp_packet_v2 net/nfc/nci/rsp.c:107 [inline]
 nci_core_init_rsp_packet net/nfc/nci/rsp.c:131 [inline]
 nci_rsp_packet+0x294d/0x29a0 net/nfc/nci/rsp.c:376
 nci_rx_work+0x1f3/0x500 net/nfc/nci/core.c:1518
 process_one_work kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2706
 worker_thread+0xf45/0x1490 kernel/workqueue.c:2787
 kthread+0x3ed/0x540 kernel/kthread.c:388
 ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

Uninit was created at:
 slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768
 slab_alloc_node mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523
 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560
 __alloc_skb+0x318/0x740 net/core/skbuff.c:651
 alloc_skb include/linux/skbuff.h:1286 [inline]
 virtual_ncidev_write+0x6d/0x280 drivers/nfc/virtual_ncidev.c:120
 vfs_write+0x48b/0x1200 fs/read_write.c:588
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xd0 fs/read_write.c:652
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 0 PID: 5070 Comm: kworker/u4:3 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: nfc2_nci_rx_wq nci_rx_work
=====================================================


---
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