syzbot


KMSAN: uninit-value in nci_rsp_packet (2)

Status: upstream: reported on 2024/05/14 05:53
Subsystems: net nfc
[Documentation on labels]
Reported-by: syzbot+cb0a0caa117154656cf8@syzkaller.appspotmail.com
First crash: 39d, last: 39d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [net?] [nfc?] KMSAN: uninit-value in nci_rsp_packet (2) 0 (1) 2024/05/14 05:53
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in nci_rsp_packet net nfc 1 141d 141d 0/27 auto-obsoleted due to no activity on 2024/05/07 18:24

Sample crash report:
=====================================================
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
=====================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/10 05:46 upstream 45db3ab70092 de979bc2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nci_rsp_packet
* Struck through repros no longer work on HEAD.