syzbot


KMSAN: uninit-value in rtl8150_open (2)

Status: upstream: reported on 2026/03/25 02:40
Subsystems: usb net
[Documentation on labels]
Reported-by: syzbot+9db6c624635564ad813c@syzkaller.appspotmail.com
First crash: 5d22h, last: 5d22h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [usb?] [net?] KMSAN: uninit-value in rtl8150_open (2) 2 (3) 2026/03/26 00:33
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in rtl8150_open net usb 7 3 197d 211d 0/29 auto-obsoleted due to no activity on 2025/12/19 09:52

Sample crash report:
usb 2-1: device reset failed
=====================================================
BUG: KMSAN: uninit-value in set_carrier drivers/net/usb/rtl8150.c:726 [inline]
BUG: KMSAN: uninit-value in rtl8150_open+0x1131/0x1360 drivers/net/usb/rtl8150.c:763
 set_carrier drivers/net/usb/rtl8150.c:726 [inline]
 rtl8150_open+0x1131/0x1360 drivers/net/usb/rtl8150.c:763
 __dev_open+0x8e3/0xd40 net/core/dev.c:1702
 __dev_change_flags+0x32f/0x950 net/core/dev.c:9764
 netif_change_flags+0x8d/0x1e0 net/core/dev.c:9827
 dev_change_flags+0x18c/0x320 net/core/dev_api.c:68
 devinet_ioctl+0x10dd/0x25a0 net/ipv4/devinet.c:1199
 inet_ioctl+0x4c0/0x6f0 net/ipv4/af_inet.c:1015
 sock_do_ioctl net/socket.c:1254 [inline]
 sock_ioctl+0x769/0x1140 net/socket.c:1375
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0x23c/0x400 fs/ioctl.c:583
 __x64_sys_ioctl+0x97/0xe0 fs/ioctl.c:583
 x64_sys_call+0x1975/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable tmp.i created at:
 set_carrier drivers/net/usb/rtl8150.c:723 [inline]
 rtl8150_open+0xc26/0x1360 drivers/net/usb/rtl8150.c:763
 __dev_open+0x8e3/0xd40 net/core/dev.c:1702

CPU: 1 UID: 0 PID: 5428 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
=====================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/03/21 02:31 upstream c612261bedd6 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in rtl8150_open
* Struck through repros no longer work on HEAD.