syzbot


WARNING in __xdp_reg_mem_model

Status: upstream: reported C repro on 2024/04/16 15:04
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+d93a626e7fffa5547e57@syzkaller.appspotmail.com
First crash: 60d, last: 25d
Bug presence (1)
Date Name Commit Repro Result
2024/05/03 upstream (ToT) f03359bca01b C [report] WARNING in __xdp_reg_mem_model
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in __xdp_reg_mem_model bpf net C done 89 5d14h 59d 0/27 upstream: reported C repro on 2024/04/17 09:15
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/05/21 05:45 1h11m bisect fix linux-6.1.y job log (0) log

Sample crash report:
RDX: 0000000000000050 RSI: 0000000020000340 RDI: 000000000000000a
RBP: 0000000000000001 R08: 00007ffea6550ea7 R09: 00000000000000a0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3543 at net/core/xdp.c:296 __xdp_reg_mem_model+0x2d5/0x620 net/core/xdp.c:294
Modules linked in:
CPU: 0 PID: 3543 Comm: syz-executor846 Not tainted 6.1.86-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__xdp_reg_mem_model+0x2d5/0x620 net/core/xdp.c:296
Code: 41 89 c5 85 c0 79 5b e8 39 dd fa f8 eb a5 e8 32 dd fa f8 4c 89 ff e8 ba d9 37 f9 4d 63 e4 48 c7 c7 c0 59 2a 8e e8 1b a2 03 02 <0f> 0b e9 e3 01 00 00 e8 0f dd fa f8 48 8d 7c 24 60 48 89 f8 48 c1
RSP: 0018:ffffc900039df680 EFLAGS: 00010246
RAX: 58241fc6aa612700 RBX: 1ffff9200073bed8 RCX: ffffffff8a935678
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc900039df600
RBP: ffffc900039df750 R08: dffffc0000000000 R09: fffff5200073bec1
R10: 0000000000000000 R11: dffffc0000000001 R12: fffffffffffffff4
R13: dffffc0000000000 R14: 0000000000000002 R15: ffffc900039df9a0
FS:  000055555649f380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e6d290020 CR3: 00000000775df000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 xdp_reg_mem_model+0x1e/0x30 net/core/xdp.c:341
 xdp_test_run_setup net/bpf/test_run.c:177 [inline]
 bpf_test_run_xdp_live+0x365/0x1ea0 net/bpf/test_run.c:355
 bpf_prog_test_run_xdp+0x7d1/0x1130 net/bpf/test_run.c:1387
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3670
 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:5023
 __do_sys_bpf kernel/bpf/syscall.c:5109 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5107 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5107
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8e6d25d079
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffea6551108 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ffea6551120 RCX: 00007f8e6d25d079
RDX: 0000000000000050 RSI: 0000000020000340 RDI: 000000000000000a
RBP: 0000000000000001 R08: 00007ffea6550ea7 R09: 00000000000000a0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/16 15:33 linux-6.1.y cd5d98c0556c 0d592ce4 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in __xdp_reg_mem_model
2024/04/16 15:03 linux-6.1.y cd5d98c0556c 0d592ce4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in __xdp_reg_mem_model
* Struck through repros no longer work on HEAD.