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

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Date: Mon, 13 May 2024 22:53:22 -0700
From: syzbot <syzbot+cb0a0caa117154656cf8@...kaller.appspotmail.com>
To: davem@...emloft.net, edumazet@...gle.com, krzk@...nel.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 (2)

Hello,

syzbot found the following issue on:

HEAD commit:    45db3ab70092 Merge tag '6.9-rc7-ksmbd-fixes' of git://git...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1350fb70980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=617171361dd3cd47
dashboard link: https://syzkaller.appspot.com/bug?extid=cb0a0caa117154656cf8
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/232e7c2a73a5/disk-45db3ab7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7e9bf7c936ab/vmlinux-45db3ab7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5e8f98ee02d8/bzImage-45db3ab7.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cb0a0caa117154656cf8@...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+0x2b4f/0x2c00 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+0x2b4f/0x2c00 net/nfc/nci/rsp.c:376
 nci_rx_work+0x268/0x5d0 net/nfc/nci/core.c:1527
 process_one_work kernel/workqueue.c:3267 [inline]
 process_scheduled_works+0xa81/0x1bd0 kernel/workqueue.c:3348
 worker_thread+0xea5/0x1560 kernel/workqueue.c:3429
 kthread+0x3e2/0x540 kernel/kthread.c:388
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3810 [inline]
 slab_alloc_node mm/slub.c:3851 [inline]
 kmem_cache_alloc_node+0x622/0xc90 mm/slub.c:3894
 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577
 __alloc_skb+0x35b/0x7a0 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1313 [inline]
 virtual_ncidev_write+0x6d/0x290 drivers/nfc/virtual_ncidev.c:120
 vfs_write+0x49b/0x1520 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+0x93/0xe0 fs/read_write.c:652
 x64_sys_call+0x3062/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 PID: 57 Comm: kworker/u8:3 Not tainted 6.9.0-rc7-syzkaller-00056-g45db3ab70092 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: nfc2_nci_rx_wq nci_rx_work
=====================================================


---
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