syzbot


invalid opcode in __traceiter_percpu_free_percpu

Status: upstream: reported C repro on 2025/05/28 14:12
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+7efe24b37ce94e0ec091@syzkaller.appspotmail.com
First crash: 39d, last: 25d
Bug presence (2)
Date Name Commit Repro Result
2025/05/29 lts (merge base) 02b72ccb5f9d C [report] invalid opcode in __traceiter_percpu_free_percpu
2025/05/29 upstream (ToT) e0797d3b91de C [report] invalid opcode in __traceiter_percpu_free_percpu
Last patch testing requests (2)
Created Duration User Patch Repo Result
2025/06/12 00:37 1h06m retest repro android14-6.1 report log
2025/06/12 00:37 9m retest repro android14-6.1 report log

Sample crash report:
CFI failure at __traceiter_percpu_free_percpu+0x87/0xe0 include/trace/events/percpu.h:54 (target: tp_stub_func+0x0/0x10; expected type: 0xc88d2a22)
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 39 Comm: kworker/1:1 Not tainted 6.1.138-syzkaller-00046-gdb710ea87c32 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events bpf_prog_free_deferred

RIP: 0010:__traceiter_percpu_free_percpu+0x87/0xe0 include/trace/events/percpu.h:54
Code: f8 48 c1 e8 03 80 3c 18 00 74 05 e8 a3 ff 0f 00 49 8b 7d 08 4c 89 fe 8b 55 d4 48 8b 4d c8 41 ba de d5 72 37 45 03 56 fc 74 02 <0f> 0b 41 ff d6 49 83 c4 18 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08
RSP: 0018:ffffc9000028faf8 EFLAGS: 00010092

RAX: 1ffff11021a3e8c3 RBX: dffffc0000000000 RCX: 0000607e08c0ffc0
RDX: 000000000000ffc0 RSI: ffffe8ffffc00000 RDI: ffffc900000e9000
RBP: ffffc9000028fb30 R08: dffffc0000000000 R09: fffffbfff0ee425e
R10: 00000000dcb33cea R11: 1ffffffff0ee425d R12: ffff88810d1f4610
R13: ffff88810d1f4610 R14: ffffffff81710d60 R15: ffffe8ffffc00000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f438d1c61f0 CR3: 0000000006e0f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 trace_percpu_free_percpu include/trace/events/percpu.h:54 [inline]
 free_percpu+0xd09/0x1020 mm/percpu.c:2304
 __bpf_prog_free+0xab/0xe0 kernel/bpf/core.c:269
 bpf_prog_unlock_free include/linux/filter.h:903 [inline]
 bpf_jit_free+0x1ae/0x1e0 arch/x86/net/bpf_jit_comp.c:2592
 bpf_prog_free_deferred+0x614/0x720 kernel/bpf/core.c:2584
 process_one_work+0x71f/0xc40 kernel/workqueue.c:2299
 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__traceiter_percpu_free_percpu+0x87/0xe0 include/trace/events/percpu.h:54
Code: f8 48 c1 e8 03 80 3c 18 00 74 05 e8 a3 ff 0f 00 49 8b 7d 08 4c 89 fe 8b 55 d4 48 8b 4d c8 41 ba de d5 72 37 45 03 56 fc 74 02 <0f> 0b 41 ff d6 49 83 c4 18 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08
RSP: 0018:ffffc9000028faf8 EFLAGS: 00010092

RAX: 1ffff11021a3e8c3 RBX: dffffc0000000000 RCX: 0000607e08c0ffc0
RDX: 000000000000ffc0 RSI: ffffe8ffffc00000 RDI: ffffc900000e9000
RBP: ffffc9000028fb30 R08: dffffc0000000000 R09: fffffbfff0ee425e
R10: 00000000dcb33cea R11: 1ffffffff0ee425d R12: ffff88810d1f4610
R13: ffff88810d1f4610 R14: ffffffff81710d60 R15: ffffe8ffffc00000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f438d1c61f0 CR3: 0000000006e0f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/28 15:41 android14-6.1 db710ea87c32 874a1386 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 invalid opcode in __traceiter_percpu_free_percpu
2025/05/28 14:02 android14-6.1 db710ea87c32 874a1386 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 invalid opcode in __traceiter_percpu_free_percpu
2025/05/28 12:32 android14-6.1 db710ea87c32 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 invalid opcode in __traceiter_percpu_free_percpu
* Struck through repros no longer work on HEAD.