Let's tell the bot about the fix #syz fix: bpf: prevent decl_tag from being referenced in func_proto On Mon, Oct 17, 2022 at 9:16 AM 'Stanislav Fomichev' via syzkaller-bugs <syzkaller-bugs@xxxxxxxxxxxxxxxx> wrote: > > On Sat, Oct 15, 2022 at 11:52 PM syzbot > <syzbot+6280ebbcdba3e0c14fde@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 0326074ff465 Merge tag 'net-next-6.1' of git://git.kernel... > > git tree: bpf > > console+strace: https://syzkaller.appspot.com/x/log.txt?x=1376ba52880000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=796b7c2847a6866a > > dashboard link: https://syzkaller.appspot.com/bug?extid=6280ebbcdba3e0c14fde > > 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=15e182aa880000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1677bfcc880000 > > > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/7cc67ced256d/disk-0326074f.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/86a7be29267c/vmlinux-0326074f.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+6280ebbcdba3e0c14fde@xxxxxxxxxxxxxxxxxxxxxxxxx > > > > ------------[ cut here ]------------ > > WARNING: CPU: 0 PID: 3609 at kernel/bpf/btf.c:1946 btf_type_id_size+0x2d5/0x9d0 kernel/bpf/btf.c:1946 > > Modules linked in: > > CPU: 0 PID: 3609 Comm: syz-executor361 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 > > RIP: 0010:btf_type_id_size+0x2d5/0x9d0 kernel/bpf/btf.c:1946 > > Code: ef e8 7f 8e e4 ff 41 83 ff 0b 77 28 f6 44 24 10 18 75 3f e8 6d 91 e4 ff 44 89 fe bf 0e 00 00 00 e8 20 8e e4 ff e8 5b 91 e4 ff <0f> 0b 45 31 f6 e9 98 02 00 00 41 83 ff 12 74 18 e8 46 91 e4 ff 44 > > RSP: 0018:ffffc90003cefb40 EFLAGS: 00010293 > > RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 > > RDX: ffff8880259c0000 RSI: ffffffff81968415 RDI: 0000000000000005 > > RBP: ffff88801270ca00 R08: 0000000000000005 R09: 000000000000000e > > R10: 0000000000000011 R11: 0000000000000000 R12: 0000000000000000 > > R13: 0000000000000011 R14: ffff888026ee6424 R15: 0000000000000011 > > FS: 000055555641b300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 0000000000f2e258 CR3: 000000007110e000 CR4: 00000000003506f0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > <TASK> > > btf_func_proto_check kernel/bpf/btf.c:4447 [inline] > > btf_check_all_types kernel/bpf/btf.c:4723 [inline] > > btf_parse_type_sec kernel/bpf/btf.c:4752 [inline] > > btf_parse kernel/bpf/btf.c:5026 [inline] > > btf_new_fd+0x1926/0x1e70 kernel/bpf/btf.c:6892 > > bpf_btf_load kernel/bpf/syscall.c:4324 [inline] > > __sys_bpf+0xb7d/0x4cf0 kernel/bpf/syscall.c:5010 > > __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] > > __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] > > __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5067 > > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > > entry_SYSCALL_64_after_hwframe+0x63/0xcd > > RIP: 0033:0x7f0fbae41c69 > > 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:00007ffc8aeb6228 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 > > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0fbae41c69 > > RDX: 0000000000000020 RSI: 0000000020000140 RDI: 0000000000000012 > > RBP: 00007f0fbae05e10 R08: 0000000000000000 R09: 0000000000000000 > > R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f0fbae05ea0 > > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > > </TASK> > > Will be addressed by > https://lore.kernel.org/bpf/d1379e3f-a64d-8c27-9b77-f6de085ce498@xxxxxxxx/T/#u > > > > --- > > 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. > > syzbot can test patches for this issue, for details see: > > https://goo.gl/tpsmEJ#testing-patches > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CAKH8qBu%2BoT%2BBF6sA4PKxfUsj43O5BNSLzrdhirWOLJ0O8KbA3w%40mail.gmail.com.
