[syzbot] [net?] [nfc?] KMSAN: uninit-value in nci_ntf_packet

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3f82f1c3a036 Merge tag 'x86-urgent-2023-12-23' of git://gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=111a1579e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=4a65fa9f077ead01
dashboard link: https://syzkaller.appspot.com/bug?extid=29b5ca705d2e0f4a44d2
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/6dcfebcfcfff/disk-3f82f1c3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/827b51868337/vmlinux-3f82f1c3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4571542e7260/bzImage-3f82f1c3.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+29b5ca...@syzkaller.appspotmail.com

nci: nci_add_new_protocol: the target found does not have the desired protocol
=====================================================
BUG: KMSAN: uninit-value in nci_rf_discover_ntf_packet net/nfc/nci/ntf.c:386 [inline]
BUG: KMSAN: uninit-value in nci_ntf_packet+0x2ac8/0x39c0 net/nfc/nci/ntf.c:798
nci_rf_discover_ntf_packet net/nfc/nci/ntf.c:386 [inline]
nci_ntf_packet+0x2ac8/0x39c0 net/nfc/nci/ntf.c:798
nci_rx_work+0x213/0x500 net/nfc/nci/core.c:1522
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2700
worker_thread+0xf45/0x1490 kernel/workqueue.c:2781
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+0x561/0x1490 fs/read_write.c:582
ksys_write+0x20f/0x4c0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x93/0xd0 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 1 PID: 55 Comm: kworker/u4:3 Not tainted 6.7.0-rc6-syzkaller-00303-g3f82f1c3a036 #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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[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 610a9b8f49fb Linux 6.7-rc8
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=15d58055e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=e51fe20c3e51ba7f

dashboard link: https://syzkaller.appspot.com/bug?extid=29b5ca705d2e0f4a44d2
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1119f31ae80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15649d81e80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/28ecdd56de1e/disk-610a9b8f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3c5afc17c174/vmlinux-610a9b8f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/96ff79b2992d/bzImage-610a9b8f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+29b5ca...@syzkaller.appspotmail.com

nci: nci_rf_discover_ntf_packet: unsupported rf_tech_and_mode 0xff

CPU: 1 PID: 4386 Comm: kworker/u4:31 Not tainted 6.7.0-rc8-syzkaller #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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