syzbot


WARNING in btf_type_id_size (2)

Status: upstream: reported C repro on 2023/05/24 19:44
Labels: bpf (incorrect?)
Reported-by: syzbot+958967f249155967d42a@syzkaller.appspotmail.com
First crash: 9d16h, last: 9d15h

Cause bisection: failed (error log, bisect log)
Discussions (2)
Title Replies (including bot) Last reply
[PATCH bpf-next 1/2] bpf: Silence a warning in btf_type_id_size() 1 (1) 2023/05/27 22:31
[syzbot] [bpf?] WARNING in btf_type_id_size (2) 0 (1) 2023/05/24 19:44
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in btf_type_id_size origin:upstream C 2 8d16h 9d10h 0/3 upstream: reported C repro on 2023/05/21 01:39
upstream WARNING in btf_type_id_size bpf C done 10 155d 226d 24/24 fixed on 2023/02/24 13:50

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5005 at kernel/bpf/btf.c:1988 btf_type_id_size+0x2d9/0x9d0 kernel/bpf/btf.c:1988
Modules linked in:
CPU: 0 PID: 5005 Comm: syz-executor387 Not tainted 6.4.0-rc1-syzkaller-00096-g0613d8ca9ab3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:btf_type_id_size+0x2d9/0x9d0 kernel/bpf/btf.c:1988
Code: ef e8 6b 58 e2 ff 41 83 ff 0b 77 28 f6 44 24 10 18 75 3f e8 f9 5b e2 ff 44 89 fe bf 0e 00 00 00 e8 0c 58 e2 ff e8 e7 5b e2 ff <0f> 0b 45 31 f6 e9 98 02 00 00 41 83 ff 12 74 18 e8 d2 5b e2 ff 44
RSP: 0018:ffffc90003a9fb68 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88801f7ebb80 RSI: ffffffff81a1e8f9 RDI: 0000000000000005
RBP: ffff888020813400 R08: 0000000000000005 R09: 000000000000000e
R10: 0000000000000011 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000011 R14: ffff88802101f418 R15: 0000000000000011
FS:  00005555567b2300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001a4b398 CR3: 000000002c9c3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 map_check_btf kernel/bpf/syscall.c:1024 [inline]
 map_create+0x1157/0x1860 kernel/bpf/syscall.c:1198
 __sys_bpf+0x127f/0x5420 kernel/bpf/syscall.c:5040
 __do_sys_bpf kernel/bpf/syscall.c:5162 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5160 [inline]
 __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5160
 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: 0033:0x7f379d511d09
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:00007ffea061b348 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f379d511d09
RDX: 0000000000000048 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007f379d4d5eb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f379d4d5f40
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2023/05/20 20:21 bpf 0613d8ca9ab3 4bce1a3e .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in btf_type_id_size
2023/05/20 20:17 net 67caf26d769e 4bce1a3e .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in btf_type_id_size
2023/05/20 21:11 bpf-next 18f558876ff0 4bce1a3e .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in btf_type_id_size
2023/05/20 19:52 net-next dcbe4ea1985d 4bce1a3e .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in btf_type_id_size
2023/05/20 20:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1fcbaa18b28 4bce1a3e .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in btf_type_id_size
2023/05/20 19:33 net-next dcbe4ea1985d 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in btf_type_id_size
* Struck through repros no longer work on HEAD.