Messages in this thread | | | Date | Tue, 02 Jan 2024 05:50:29 -0800 | Subject | Re: [syzbot] [nfc?] [net?] KMSAN: uninit-value in nci_ntf_packet | From | syzbot <> |
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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+29b5ca705d2e0f4a44d2@syzkaller.appspotmail.com
nci: nci_rf_discover_ntf_packet: unsupported rf_tech_and_mode 0xff ===================================================== 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: 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 =====================================================
--- 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.
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