linux-kernel - [syzbot] [bpf?] WARNING in do_misc

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Message-ID: <68904050.050a0220.7f033.0001.GAE@google.com>
Date: Sun, 03 Aug 2025 22:08:32 -0700
From: syzbot <syzbot+a9ed3d9132939852d0df@...kaller.appspotmail.com>
To: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org, 
	daniel@...earbox.net, eddyz87@...il.com, haoluo@...gle.com, 
	john.fastabend@...il.com, jolsa@...nel.org, kpsingh@...nel.org, 
	linux-kernel@...r.kernel.org, martin.lau@...ux.dev, sdf@...ichev.me, 
	song@...nel.org, syzkaller-bugs@...glegroups.com, yonghong.song@...ux.dev
Subject: [syzbot] [bpf?] WARNING in do_misc_fixups

Hello,

syzbot found the following issue on:

HEAD commit:    a6923c06a3b2 Merge tag 'bpf-fixes' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1561dcf0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f89bb9497754f485
dashboard link: https://syzkaller.appspot.com/bug?extid=a9ed3d9132939852d0df
compiler:       aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=165d0aa2580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=117bd834580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/fa3fbcfdac58/non_bootable_disk-a6923c06.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9862ca8219e0/vmlinux-a6923c06.xz
kernel image: https://storage.googleapis.com/syzbot-assets/042ebe320cfd/Image-a6923c06.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a9ed3d9132939852d0df@...kaller.appspotmail.com

------------[ cut here ]------------
verifier bug: not inlined functions bpf_probe_read_kernel_str#115 is missing func(1)
WARNING: CPU: 1 PID: 3594 at kernel/bpf/verifier.c:22838 do_misc_fixups+0x1784/0x1ab4 kernel/bpf/verifier.c:22838
Modules linked in:
CPU: 1 UID: 0 PID: 3594 Comm: syz.2.17 Not tainted 6.16.0-syzkaller-11105-ga6923c06a3b2 #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
pstate: 61402009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : do_misc_fixups+0x1784/0x1ab4 kernel/bpf/verifier.c:22838
lr : do_misc_fixups+0x1784/0x1ab4 kernel/bpf/verifier.c:22838
sp : ffff80008936b9a0
x29: ffff80008936b9a0 x28: f5ff8000832f5000 x27: 000000000000000a
x26: f8f0000007ba8000 x25: 0000000000000000 x24: f8f0000007bae200
x23: 000000000000f0ff x22: 000000000000000a x21: f8f0000007bae128
x20: f8f0000007ba8aa8 x19: ffff80008243e828 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: ffff800081b73b80
x14: 0000000000000342 x13: 0000000000000000 x12: 0000000000000002
x11: 00000000000000c0 x10: 646e0773d90f24cc x9 : 73727a981a23afd7
x8 : fcf0000007bb36f8 x7 : 0000000000000190 x6 : 0000003978391654
x5 : 0000000000000001 x4 : fbffff3fffffffff x3 : 000000000000ffff
x2 : 0000000000000000 x1 : 0000000000000000 x0 : fcf0000007bb2500
Call trace:
 do_misc_fixups+0x1784/0x1ab4 kernel/bpf/verifier.c:22838 (P)
 bpf_check+0x1308/0x2a8c kernel/bpf/verifier.c:24739
 bpf_prog_load+0x634/0xb74 kernel/bpf/syscall.c:2979
 __sys_bpf+0x2e0/0x1a3c kernel/bpf/syscall.c:6029
 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
 __arm64_sys_bpf+0x24/0x34 kernel/bpf/syscall.c:6137
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151
 el0_svc+0x34/0x10c arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:596
---[ end trace 0000000000000000 ]---


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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