Re: [syzbot] [bpf?] general protection fault in bpf_check (2)

From: syzbot
Date: Sun Mar 24 2024 - 04:37:16 EST


syzbot has bisected this issue to:

commit 6082b6c328b5486da2b356eae94b8b83c98b5565
Author: Alexei Starovoitov <ast@xxxxxxxxxx>
Date: Fri Mar 8 01:08:03 2024 +0000

bpf: Recognize addr_space_cast instruction in the verifier.

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=101f5ac9180000
start commit: ddb2ffdc474a libbpf: Define MFD_CLOEXEC if not available
git tree: bpf
final oops: https://syzkaller.appspot.com/x/report.txt?x=121f5ac9180000
console output: https://syzkaller.appspot.com/x/log.txt?x=141f5ac9180000
kernel config: https://syzkaller.appspot.com/x/.config?x=6fb1be60a193d440
dashboard link: https://syzkaller.appspot.com/bug?extid=ba82760c63ba37799f70
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=115671f1180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14f14e31180000

Reported-by: syzbot+ba82760c63ba37799f70@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 6082b6c328b5 ("bpf: Recognize addr_space_cast instruction in the verifier.")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection