Re: [syzbot] [trace?] WARNING in tracepoint_add_func (2)

On Fri, 07 Mar 2025 16:02:22 -0800
syzbot [off-list ref] wrote:

syzbot found the following issue on:

HEAD commit:    7eb172143d55 Linux 6.14-rc5
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11b9a464580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bed8205d3b84ef81
dashboard link: https://syzkaller.appspot.com/bug?extid=161412ccaeff20ce4dde
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

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

Yeah, because you add random fault injections, you wont hit it, unless you
have the right addition of faults.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/06a492964134/disk-7eb17214.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/83adeaa22219/vmlinux-7eb17214.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7386164633ed/bzImage-7eb17214.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+161412ccaeff20ce4dde@syzkaller.appspotmail.com

There's a ton of fault injections here, which if happened in a real
situation, would mean the system was likely about to crash. Especially
since it's failing on 1 page allocations of GFP_KERNEL, which only happens
when there's no free memory available.

This warning is the least of you worries in such a scenario.

-- Steve