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

Status: premoderation: reported on 2026/09/05 20:00
Reported-by: syzbot+52bab9ed6058d266e184@syzkaller.appspotmail.com
First crash: 69d, last: 10d
▶ ▼ Similar bugs (12)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 1 1955d 1955d 0/1 auto-closed as invalid on 2021/11/04 08:11
android-5-10 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 239 52d 76d 0/2 auto-obsoleted due to no activity on 2026/11/11 19:34
linux-6.6 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 56 50d 69d 0/2 upstream: reported on 2026/09/05 08:42
linux-6.1 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 46 45d 70d 0/3 upstream: reported on 2026/09/05 05:07
android-5-15 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 43 774d 850d 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 -1 330 49d 93d 0/2 premoderation: reported on 2026/08/13 04:53
android-54 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 6 1806d 1908d 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 573d 573d 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) -1 132 50d 70d 0/2 auto-obsoleted due to no activity on 2026/11/13 06:10
linux-4.19 SYZFAIL: open of /sys/kernel/debug/kcov failed (2) -1 4 1806d 1806d 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 709d 709d 0/2 auto-obsoleted due to no activity on 2025/03/04 17:20
linux-5.15 SYZFAIL: open of /sys/kernel/debug/kcov failed -1 36 52d 69d 0/3 upstream: reported on 2026/09/05 12:46

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=4 req=355 state=1 status=67 (errno 9: Bad file descriptor)

Crashes (23):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/11/03 11:25 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 10:50 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 10:38 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 10:27 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 10:01 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 09:48 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 09:00 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 08:45 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 08:43 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 08:41 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/11/03 08:41 android16-6.12 9763f69eefa9 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/27 22:14 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/16 11:50 android16-6.12 1107981d2d5c 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/16 00:42 android16-6.12 5c165027e17c 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/15 19:55 android16-6.12 5c165027e17c 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/13 13:16 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/13 08:56 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/12 02:47 android16-6.12 8eff909dd82d 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/10 11:53 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/10 11:50 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/10 11:48 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/10 08:17 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
2026/09/05 19:59 android16-6.12 4e585dd7f3b7 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: open of /sys/kernel/debug/kcov failed
* Struck through repros no longer work on HEAD.