syzbot


WARNING in kcov_remote_start (6)

Status: upstream: reported on 2024/11/04 21:25
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+3f51ad7ac3ae57a6fdcc@syzkaller.appspotmail.com
First crash: 399d, last: now
Discussions (3)
Title Replies (including bot) Last reply
[syzbot] Monthly wireless report (Nov 2025) 0 (1) 2025/11/27 07:44
[syzbot] Monthly wireless report (Oct 2025) 0 (1) 2025/10/27 08:42
[syzbot] [wireless?] WARNING in kcov_remote_start (6) 0 (1) 2024/11/04 21:25
Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in kcov_remote_start -1 4 329d 428d 0/3 auto-obsoleted due to no activity on 2025/04/19 19:40
upstream WARNING in kcov_remote_start (4) usb -1 107983 512d 543d 26/29 fixed on 2024/07/10 08:24
upstream WARNING in kcov_remote_start (2) usb -1 C 1153 2284d 2284d 0/29 closed as invalid on 2019/09/04 14:27
upstream WARNING in kcov_remote_start (5) wireless -1 4243 408d 508d 28/29 fixed on 2024/10/22 14:56
upstream WARNING in kcov_remote_start (3) usb -1 265513 547d 616d 25/29 fixed on 2024/06/05 13:52
upstream WARNING in kcov_remote_start usb -1 C 655 2284d 2284d 0/29 closed as invalid on 2019/09/03 16:37
linux-6.1 WARNING in kcov_remote_start -1 4 14d 159d 0/3 upstream: reported on 2025/06/28 15:34

Sample crash report:
------------[ cut here ]------------
WARNING: kernel/kcov.c:872 at kcov_remote_start+0x5d9/0x6f0 kernel/kcov.c:872, CPU#1: kworker/1:6/5899
Modules linked in:
CPU: 1 UID: 0 PID: 5899 Comm: kworker/1:6 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:kcov_remote_start+0x5d9/0x6f0 kernel/kcov.c:872
Code: 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 01 02 bb 02 90 0f 0b 90 e9 62 fa ff ff 90 0f 0b 90 0f b7 83 80 04 00 00 e9 a3 fa ff ff 90 <0f> 0b 90 eb 04 90 0f 0b 90 e8 a9 d1 03 09 89 c0 48 c7 c7 60 02 ac
RSP: 0018:ffffc9000519f728 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff8880262a8000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b3ecf40 RDI: ffffffff8b3ecf00
RBP: ffffc9000519fa30 R08: ffffffff8ac613f1 R09: ffffffff8d5aeba0
R10: dffffc0000000000 R11: fffffbfff1db3a4f R12: ffff888027d10000
R13: dffffc0000000000 R14: 0100000000000006 R15: ffff888145b8e000
FS:  0000000000000000(0000) GS:ffff888126e69000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000057030 CR3: 0000000035b9e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kcov_remote_start_usb include/linux/kcov.h:55 [inline]
 hub_event+0x158/0x4a20 drivers/usb/core/hub.c:5888
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Crashes (3559):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/04 23:55 upstream 559e608c4655 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 22:51 upstream 559e608c4655 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 21:26 upstream 559e608c4655 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 19:53 upstream 559e608c4655 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 15:27 upstream 559e608c4655 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 13:25 upstream 559e608c4655 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 12:50 upstream 559e608c4655 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 11:13 upstream 559e608c4655 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 10:01 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 09:50 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 08:47 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 07:29 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 06:28 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 05:11 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 04:51 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 03:09 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 01:38 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/04 00:33 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 21:51 upstream a619fe35ab41 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 20:39 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 19:34 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 16:36 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 15:24 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 11:26 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 10:03 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 08:34 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 05:18 upstream 3f9f0252130e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 03:09 upstream 4a26e7032d7d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/03 00:38 upstream 4a26e7032d7d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 23:18 upstream 4a26e7032d7d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 21:19 upstream 4a26e7032d7d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 19:32 upstream 4a26e7032d7d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 18:27 upstream 4a26e7032d7d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 18:09 upstream 4a26e7032d7d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 15:38 upstream 4a26e7032d7d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 14:37 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 12:46 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 11:19 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 10:13 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 10:02 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 08:52 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 07:40 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 06:38 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 04:27 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 03:17 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 01:12 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/12/02 01:05 upstream 1d18101a644e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/11/01 12:02 upstream ba36dd5ee6fd 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2025/10/29 04:37 upstream 8eefed8f65cc fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kcov_remote_start
2025/08/30 22:55 upstream 11e7861d680c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in kcov_remote_start
2025/08/18 18:20 upstream c17b750b3ad9 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kcov_remote_start
2025/07/13 15:21 upstream 3f31a806a62e 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in kcov_remote_start
2024/11/03 07:56 upstream 3e5e6c9900c3 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2025/10/19 16:49 upstream 1c64efcb083c 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kcov_remote_start
2025/09/02 13:14 upstream b320789d6883 96a211bc .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in kcov_remote_start
2025/07/02 05:06 upstream 66701750d556 bc80e4f0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kcov_remote_start
2025/10/12 18:44 upstream 67029a49db6c ff1712fe .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in kcov_remote_start
2025/11/02 08:57 bpf ba36dd5ee6fd 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in kcov_remote_start
2025/10/12 09:27 net f3426ac54c42 ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in kcov_remote_start
2025/08/18 08:17 net-next bab3ce404553 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in kcov_remote_start
2025/08/17 22:03 bpf-next 3ec85602f86c 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in kcov_remote_start
2025/10/06 17:43 linux-next 4a7153147192 91305dbe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kcov_remote_start
2024/10/31 21:14 linux-next f9f24ca362a4 96eb609f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kcov_remote_start
2025/04/28 17:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c72692105976 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in kcov_remote_start
* Struck through repros no longer work on HEAD.