syzbot


BUG: corrupted list in nsim_bpf_verifier_prep

Status: closed as invalid on 2024/02/12 15:10
Subsystems: net
[Documentation on labels]
First crash: 477d, last: 477d

Sample crash report:
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:32!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 3 PID: 11453 Comm: syz-executor.2 Not tainted 6.7.0-rc5-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__list_add_valid_or_report+0xba/0x100 lib/list_debug.c:32
Code: 01 fd 90 0f 0b 48 89 d9 48 c7 c7 20 e6 2e 8b e8 bc 98 01 fd 90 0f 0b 48 89 f1 48 c7 c7 a0 e6 2e 8b 48 89 de e8 a7 98 01 fd 90 <0f> 0b 48 89 f2 48 89 d9 48 89 ee 48 c7 c7 20 e7 2e 8b e8 8f 98 01
RSP: 0018:ffffc90003e3f798 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff88802bb793c0 RCX: ffffffff81697219
RDX: 0000000000000000 RSI: ffffffff8169f6c2 RDI: 0000000000000005
RBP: ffff88801cb2b6a8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: ffff8880263d5b28
R13: ffffc90000bfe000 R14: ffffc90000bfe038 R15: ffff88801cb2b6a8
FS:  00007f79877916c0(0000) GS:ffff88806b900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555562bf788 CR3: 0000000118656000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:88 [inline]
 __list_add include/linux/list.h:150 [inline]
 list_add_tail include/linux/list.h:183 [inline]
 nsim_bpf_create_prog drivers/net/netdevsim/bpf.c:247 [inline]
 nsim_bpf_verifier_prep+0x378/0x620 drivers/net/netdevsim/bpf.c:262
 bpf_prog_offload_verifier_prep+0xdc/0x170 kernel/bpf/offload.c:304
 bpf_check+0x5a28/0xa550 kernel/bpf/verifier.c:20867
 bpf_prog_load+0x1531/0x21f0 kernel/bpf/syscall.c:2716
 __sys_bpf+0xbf7/0x4910 kernel/bpf/syscall.c:5383
 __do_sys_bpf kernel/bpf/syscall.c:5487 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5485 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5485
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f7986a7cba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f79877910c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7986b9c050 RCX: 00007f7986a7cba9
RDX: 0000000000000080 RSI: 0000000020000bc0 RDI: 0000000000000005
RBP: 00007f7986ac847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7986b9c050 R15: 00007fffda3c6bd8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xba/0x100 lib/list_debug.c:32
Code: 01 fd 90 0f 0b 48 89 d9 48 c7 c7 20 e6 2e 8b e8 bc 98 01 fd 90 0f 0b 48 89 f1 48 c7 c7 a0 e6 2e 8b 48 89 de e8 a7 98 01 fd 90 <0f> 0b 48 89 f2 48 89 d9 48 89 ee 48 c7 c7 20 e7 2e 8b e8 8f 98 01
RSP: 0018:ffffc90003e3f798 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff88802bb793c0 RCX: ffffffff81697219
RDX: 0000000000000000 RSI: ffffffff8169f6c2 RDI: 0000000000000005
RBP: ffff88801cb2b6a8 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: ffff8880263d5b28
R13: ffffc90000bfe000 R14: ffffc90000bfe038 R15: ffff88801cb2b6a8
FS:  00007f79877916c0(0000) GS:ffff88806b900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555562bf788 CR3: 0000000118656000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/11 22:04 upstream a39b6ac3781d 28b24332 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: corrupted list in nsim_bpf_verifier_prep
* Struck through repros no longer work on HEAD.