Hello, syzbot found the following issue on: HEAD commit: c4c84f6fb2c4 bpf: drop unnecessary bpf_capable() check in .. git tree: bpf-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=119576a9280000 kernel config: https://syzkaller.appspot.com/x/.config?x=8bc832f563d8bf38 dashboard link: https://syzkaller.appspot.com/bug?extid=8982e75c2878b9ffeac5 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10391dde280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=137da9c5280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3cb57feeb883/disk-c4c84f6f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7ccb6d78c42d/vmlinux-c4c84f6f.xz kernel image: https://storage.googleapis.com/syzbot-assets/fb02c9cdb21c/bzImage-c4c84f6f.xz The issue was bisected to: commit c4c84f6fb2c4dc4c0f5fd927b3c3d3fd28b7030e Author: Andrii Nakryiko <andrii@xxxxxxxxxx> Date: Wed May 24 22:54:19 2023 +0000 bpf: drop unnecessary bpf_capable() check in BPF_MAP_FREEZE command bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17b7214d280000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1477214d280000 console output: https://syzkaller.appspot.com/x/log.txt?x=1077214d280000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8982e75c2878b9ffeac5@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: c4c84f6fb2c4 ("bpf: drop unnecessary bpf_capable() check in BPF_MAP_FREEZE command") ===================================== WARNING: bad unlock balance detected! 6.4.0-rc1-syzkaller-00358-gc4c84f6fb2c4 #0 Not tainted ------------------------------------- syz-executor518/5004 is trying to release lock (&map->freeze_mutex) at: [<ffffffff8193e2c4>] map_freeze kernel/bpf/syscall.c:1951 [inline] [<ffffffff8193e2c4>] __sys_bpf+0x3234/0x5520 kernel/bpf/syscall.c:5078 but there are no more locks to release! other info that might help us debug this: no locks held by syz-executor518/5004. stack backtrace: CPU: 0 PID: 5004 Comm: syz-executor518 Not tainted 6.4.0-rc1-syzkaller-00358-gc4c84f6fb2c4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 __lock_release kernel/locking/lockdep.c:5368 [inline] lock_release+0x4f1/0x670 kernel/locking/lockdep.c:5711 __mutex_unlock_slowpath+0x99/0x5e0 kernel/locking/mutex.c:907 map_freeze kernel/bpf/syscall.c:1951 [inline] __sys_bpf+0x3234/0x5520 kernel/bpf/syscall.c:5078 __do_sys_bpf kernel/bpf/syscall.c:5185 [inline] __se_sys_bpf kernel/bpf/syscall.c:5183 [inline] __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5183 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7eb20e8bb9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffe49d4848 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7eb20e8bb9 RDX: 0000000000000004 RSI: 0000000020000180 RDI: 0000000000000016 RBP: 00007f7eb20acd60 R08: 0000000000000000 --- 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 syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
