syzbot


WARNING in kcov_remote_start (6)

Status: upstream: reported on 2024/11/04 21:25
Subsystems: wireless usb
[Documentation on labels]
Reported-by: syzbot+3f51ad7ac3ae57a6fdcc@syzkaller.appspotmail.com
First crash: 441d, last: 33m
Discussions (5)
Title Replies (including bot) Last reply
[syzbot] Monthly usb report (Dec 2025) 0 (1) 2025/12/29 08:12
[syzbot] Monthly wireless report (Dec 2025) 0 (1) 2025/12/29 08:12
[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 371d 470d 0/3 auto-obsoleted due to no activity on 2025/04/19 19:40
upstream WARNING in kcov_remote_start (4) usb -1 107983 554d 585d 26/29 fixed on 2024/07/10 08:24
upstream WARNING in kcov_remote_start (2) usb -1 C 1153 2326d 2326d 0/29 closed as invalid on 2019/09/04 14:27
upstream WARNING in kcov_remote_start (5) wireless -1 4243 450d 550d 28/29 fixed on 2024/10/22 14:56
upstream WARNING in kcov_remote_start (3) usb -1 265513 589d 658d 25/29 fixed on 2024/06/05 13:52
upstream WARNING in kcov_remote_start usb -1 C 655 2326d 2326d 0/29 closed as invalid on 2019/09/03 16:37
linux-6.1 WARNING in kcov_remote_start -1 4 57d 201d 0/3 upstream: reported on 2025/06/28 15:34

Sample crash report:
------------[ cut here ]------------
WARNING: kernel/kcov.c:872 at kcov_remote_start+0x5d9/0x710 kernel/kcov.c:872, CPU#0: kworker/u8:21/23022
Modules linked in:
CPU: 0 UID: 0 PID: 23022 Comm: kworker/u8:21 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:kcov_remote_start+0x5d9/0x710 kernel/kcov.c:872
Code: 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 51 fe bd 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 c9 5e 12 09 89 c0 48 c7 c7 a0 d3 b3
RSP: 0018:ffffc9000626f978 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff88806090dac0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b3f5bc0 RDI: ffffffff8b3f5b80
RBP: ffff888031c1ddc0 R08: ffffffff8ad45021 R09: ffffffff8d5ae940
R10: dffffc0000000000 R11: fffffbfff1db686f R12: ffff888066ee5d08
R13: ffff888078fc07c0 R14: 0000000000000000 R15: ffff888066ee5d20
FS:  0000000000000000(0000) GS:ffff888126cec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c408de6 CR3: 00000000a1fbe000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kcov_remote_start_common include/linux/kcov.h:50 [inline]
 ieee80211_iface_work+0x211/0x12d0 net/mac80211/iface.c:1785
 cfg80211_wiphy_work+0x2ab/0x450 net/wireless/core.c:438
 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+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Crashes (6321):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/16 02:01 upstream 603c05a1639f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/16 01:33 upstream 603c05a1639f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 23:49 upstream 603c05a1639f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 22:44 upstream 603c05a1639f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 21:26 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 19:57 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 18:55 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 17:37 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 16:36 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 15:23 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 13:53 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kcov_remote_start
2026/01/15 11:00 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 09:52 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 07:46 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 05:39 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 04:08 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 02:48 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 01:43 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/15 01:24 upstream 944aacb68baf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 23:04 upstream c537e12daeec d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 22:01 upstream c537e12daeec d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 18:38 upstream c537e12daeec d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 17:02 upstream c537e12daeec d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 14:05 upstream c537e12daeec d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 12:45 upstream c537e12daeec d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 12:00 upstream c537e12daeec d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 11:00 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 08:34 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 07:39 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 06:10 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 04:16 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 01:40 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/14 01:24 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 22:45 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 21:39 upstream b54345928fa1 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 20:00 upstream b71e635feefc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 18:06 upstream b71e635feefc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 14:24 upstream b71e635feefc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 13:22 upstream b71e635feefc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 12:11 upstream b71e635feefc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 10:40 upstream b71e635feefc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 10:39 upstream b71e635feefc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/13 09:07 upstream b71e635feefc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kcov_remote_start
2026/01/10 08:53 upstream 372800cb95a3 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kcov_remote_start
2026/01/03 16:35 upstream 805f9a061372 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-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
2025/07/13 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
2026/01/01 09:37 upstream 349bd28a86f2 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream 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
2025/12/28 12:00 upstream d26143bb38e2 d1b870e1 .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.