[v6.1] SYZFAIL: open of /sys/kernel/debug/kcov failed

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: cf82dcca9634 Linux 6.1.187
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1099e125580000
kernel config: https://syzkaller.appspot.com/x/.config?x=31dfefc4a14efea3
dashboard link: https://syzkaller.appspot.com/bug?extid=befe23c5356f97d3ad7a
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/97e1e40b968b/disk-cf82dcca.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cfec27562c15/vmlinux-cf82dcca.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4c7cd066c46d/bzImage-cf82dcca.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+befe23...@syzkaller.appspotmail.com

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=5 req=429 state=1 status=67 (errno 9: Bad file descriptor)


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 8b73de7da85f Linux 6.6.156
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1243f4f9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7be9809cedd6b69c
dashboard link: https://syzkaller.appspot.com/bug?extid=68f69e51d7b6c9ee545c

compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d7e87682fef0/disk-8b73de7d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/096830afc063/vmlinux-8b73de7d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/89c175e4560d/bzImage-8b73de7d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:

Reported-by: syzbot+68f69e...@syzkaller.appspotmail.com

proc=4 req=405 state=1 status=67 (errno 9: Bad file descriptor)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 0996e0926f6b Linux 5.15.220
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14e40cf9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=21845b39f8fc6be8
dashboard link: https://syzkaller.appspot.com/bug?extid=29909476bdb214e9fb1c

compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:

disk image: https://storage.googleapis.com/syzbot-assets/dc4b8d8e9340/disk-0996e092.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d165c7b0f84a/vmlinux-0996e092.xz
kernel image: https://storage.googleapis.com/syzbot-assets/27adabc89e72/bzImage-0996e092.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:

Reported-by: syzbot+299094...@syzkaller.appspotmail.com

proc=5 req=220 state=1 status=67 (errno 9: Bad file descriptor)