syzbot


WARNING in rtl8150_start_xmit/usb_submit_urb

Status: upstream: reported C repro on 2025/08/29 18:38
Subsystems: net usb
[Documentation on labels]
Reported-by: syzbot+78cae3f37c62ad092caa@syzkaller.appspotmail.com
Fix commit: 958baf5eaee3 net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu-native-arm64-kvm]
First crash: 55d, last: 33d
Discussions (3)
Title Replies (including bot) Last reply
[PATCH net v3] net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast 7 (7) 2025/09/26 22:20
[PATCH] net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast 15 (15) 2025/09/25 05:59
[syzbot] [net?] [usb?] WARNING in rtl8150_start_xmit/usb_submit_urb 0 (5) 2025/09/19 18:03
Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/09/19 18:03 25m viswanathiyyappan@gmail.com patch linux-next OK log
2025/09/17 10:11 2m viswanathiyyappan@gmail.com patch linux-next error
2025/09/15 17:09 42m viswanathiyyappan@gmail.com patch linux-next OK log
2025/09/12 08:08 22m viswanathiyyappan@gmail.com patch linux-next report log
2025/09/11 21:18 10m retest repro linux-next error

Sample crash report:
------------[ cut here ]------------
URB ffff888057dae700 submitted while active
WARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0xfc1/0x1830 drivers/usb/core/urb.c:379, CPU#1: kworker/1:6/7756
Modules linked in:
CPU: 1 UID: 0 PID: 7756 Comm: kworker/1:6 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: mld mld_ifc_work
RIP: 0010:usb_submit_urb+0xfc1/0x1830 drivers/usb/core/urb.c:379
Code: 44 89 f2 e8 51 7c f5 f9 e9 13 fc ff ff e8 87 69 89 fa c6 05 e0 ba 97 08 01 90 48 c7 c7 c0 6f 56 8c 48 89 de e8 50 09 4d fa 90 <0f> 0b 90 90 e9 b7 f0 ff ff e8 61 69 89 fa eb 11 e8 5a 69 89 fa bd
RSP: 0018:ffffc9000b70f010 EFLAGS: 00010246
RAX: 0218107c34ac3b00 RBX: ffff888057dae700 RCX: ffff888021ab5a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1c7a604 R12: dffffc0000000000
R13: ffff888032a8a002 R14: ffff888057dae708 R15: 0000000000000820
FS:  0000000000000000(0000) GS:ffff8881258c4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6072c44a90 CR3: 000000000e338000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rtl8150_start_xmit+0x2cb/0x5f0 drivers/net/usb/rtl8150.c:696
 __netdev_start_xmit include/linux/netdevice.h:5222 [inline]
 netdev_start_xmit include/linux/netdevice.h:5231 [inline]
 xmit_one net/core/dev.c:3839 [inline]
 dev_hard_start_xmit+0x2d7/0x830 net/core/dev.c:3855
 sch_direct_xmit+0x241/0x4b0 net/sched/sch_generic.c:344
 __dev_xmit_skb net/core/dev.c:4114 [inline]
 __dev_queue_xmit+0x1857/0x3b50 net/core/dev.c:4691
 neigh_output include/net/neighbour.h:547 [inline]
 ip6_finish_output2+0x11fb/0x16a0 net/ipv6/ip6_output.c:141
 NF_HOOK+0x9e/0x380 include/linux/netfilter.h:318
 mld_sendpack+0x8d4/0xe60 net/ipv6/mcast.c:1860
 mld_send_cr net/ipv6/mcast.c:2159 [inline]
 mld_ifc_work+0x83e/0xd60 net/ipv6/mcast.c:2698
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/28 20:58 linux-next 7fa4d8dc380f 443c11c7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in rtl8150_start_xmit/usb_submit_urb
2025/09/18 23:50 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing a4e143636d5d e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in rtl8150_start_xmit/usb_submit_urb
2025/08/28 18:42 linux-next 7fa4d8dc380f 443c11c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in rtl8150_start_xmit/usb_submit_urb
2025/08/28 18:38 linux-next 7fa4d8dc380f 443c11c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in rtl8150_start_xmit/usb_submit_urb
2025/08/28 00:22 linux-next 7fa4d8dc380f e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in rtl8150_start_xmit/usb_submit_urb
* Struck through repros no longer work on HEAD.