SYZFAIL: open of /sys/kernel/debug/kcov failed

Status: upstream: reported on 2026/09/05 12:46
Reported-by: syzbot+29909476bdb214e9fb1c@syzkaller.appspotmail.com
First crash: 13d, last: 15h10m
▶ ▼ Similar bugs (12)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-12 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 11 2d14h 13d 0/1 premoderation: reported on 2026/09/05 20:00
linux-4.19 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 1 1899d 1899d 0/1 auto-closed as invalid on 2021/11/04 08:11
android-5-10 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 151 1h07m 20d 0/2 premoderation: reported on 2026/08/29 11:39
linux-6.6 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 46 13h19m 13d 0/2 upstream: reported on 2026/09/05 08:42
linux-6.1 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 36 13h55m 13d 0/3 upstream: reported on 2026/09/05 05:07
android-5-15 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 43 718d 794d 0/2 auto-obsoleted due to no activity on 2024/11/19 12:38
android-6-1 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 242 29m 36d 0/2 premoderation: reported on 2026/08/13 04:53
android-54 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 6 1750d 1851d 0/2 auto-closed as invalid on 2022/04/02 23:36
android-5-15 SYZFAIL: open of /sys/kernel/debug/kcov failed (3) -1 1 517d 517d 0/2 auto-obsoleted due to no activity on 2025/07/18 18:42
android-5-15 SYZFAIL: open of /sys/kernel/debug/kcov failed (4) -1 98 1d12h 13d 0/2 premoderation: reported on 2026/09/05 02:32
linux-4.19 SYZFAIL: open of /sys/kernel/debug/kcov failed (2) -1 4 1750d 1750d 0/1 auto-closed as invalid on 2022/04/02 14:00
android-5-15 SYZFAIL: open of /sys/kernel/debug/kcov failed (2) -1 1 653d 653d 0/2 auto-obsoleted due to no activity on 2025/03/04 17:20

Sample crash report:
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: open of /sys/kernel/debug/kcov failed
 (errno 2: No such file or directory)
SYZFAIL: repeatedly failed to execute the program
proc=0 req=306 state=1 status=67 (errno 9: Bad file descriptor)

Crashes (34):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/18 11:15 linux-5.15.y 0248c33e835e 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/18 02:06 linux-5.15.y 0248c33e835e 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/18 02:05 linux-5.15.y 0248c33e835e 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/18 02:04 linux-5.15.y 0248c33e835e 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/17 10:57 linux-5.15.y 0248c33e835e 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/17 10:55 linux-5.15.y 0248c33e835e 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/17 05:22 linux-5.15.y 0248c33e835e 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/17 05:21 linux-5.15.y 0248c33e835e 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/17 05:20 linux-5.15.y 0248c33e835e 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/17 05:19 linux-5.15.y 0248c33e835e 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/16 09:15 linux-5.15.y 0248c33e835e 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/16 02:04 linux-5.15.y 0248c33e835e 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/15 22:05 linux-5.15.y 0248c33e835e 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/14 19:28 linux-5.15.y 0248c33e835e 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/14 19:28 linux-5.15.y 0248c33e835e 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/13 10:22 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 18:09 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 18:05 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 18:05 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 18:04 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 08:43 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 07:44 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 07:43 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 07:40 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 07:36 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 07:34 linux-5.15.y 0996e0926f6b 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/11 19:57 linux-5.15.y 0996e0926f6b b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/10 18:12 linux-5.15.y 0996e0926f6b 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/10 18:11 linux-5.15.y 0996e0926f6b 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/10 18:10 linux-5.15.y 0996e0926f6b 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/06 03:08 linux-5.15.y 0996e0926f6b 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/06 03:05 linux-5.15.y 0996e0926f6b 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/05 20:36 linux-5.15.y 0996e0926f6b 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/05 12:46 linux-5.15.y 0996e0926f6b 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan SYZFAIL: open of /sys/kernel/debug/kcov failed
* Struck through repros no longer work on HEAD.