------------[ cut here ]------------
WARNING: CPU: 1 PID: 9 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 dd f6 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 60 f3 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000dd0c20 EFLAGS: 00010006
RAX: ffffffff819ed730 RBX: 0000000000000000 RCX: ffff88813fed0000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7a19
R10: fffffbfff1ff7a19 R11: 1ffffffff1ff7a18 R12: ffff88813fed1788
R13: dffffc0000000000 R14: ffffc90000dd0c88 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7030c746c0 CR3: 000000000be8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_8848bede53a6b60e+0x34/0xe0c
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run2+0x15b/0x2d0 kernel/trace/bpf_trace.c:1915
__traceiter_tlb_flush+0x69/0xb0 include/trace/events/tlb.h:38
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
switch_mm_irqs_off+0x6e3/0x9a0 arch/x86/mm/tlb.c:-1
flush_tlb_func+0x1bc/0x510 arch/x86/mm/tlb.c:773
flush_smp_call_function_queue+0x2a9/0x760 kernel/smp.c:628
__sysvec_call_function_single+0x98/0x240 arch/x86/kernel/smp.c:248
instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline]
sysvec_call_function_single+0x98/0xc0 arch/x86/kernel/smp.c:243
asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:409 [inline]
RIP: 0010:batadv_nc_worker+0x268/0x5c0 net/batman-adv/network-coding.c:723
Code: 1f 8b be 02 03 00 00 48 c7 c2 c0 d5 1f 8b e8 9f 25 20 00 e8 1a db e5 f7 e8 05 7b 00 00 48 8b 44 24 18 0f b6 04 18 84 c0 75 15 <49> ff c4 41 8b 07 49 39 c4 73 21 e8 78 4a f9 f7 e9 23 fe ff ff 44
RSP: 0018:ffffc90000ce7be0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 41288f74d7112400
RDX: 0000000000000002 RSI: ffffffff8a0b2b40 RDI: ffffffff8a59a880
RBP: ffff888022f69f00 R08: dffffc0000000000 R09: fffffbfff1ad334e
R10: fffffbfff1ad334e R11: 1ffffffff1ad334d R12: 000000000000029c
R13: fffffffffffffe38 R14: ffff888078eccc80 R15: ffff888022f69f10
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 8b be 02 03 00 00 mov 0x302(%rsi),%edi
6: 48 c7 c2 c0 d5 1f 8b mov $0xffffffff8b1fd5c0,%rdx
d: e8 9f 25 20 00 call 0x2025b1
12: e8 1a db e5 f7 call 0xf7e5db31
17: e8 05 7b 00 00 call 0x7b21
1c: 48 8b 44 24 18 mov 0x18(%rsp),%rax
21: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax
25: 84 c0 test %al,%al
27: 75 15 jne 0x3e
* 29: 49 ff c4 inc %r12 <-- trapping instruction
2c: 41 8b 07 mov (%r15),%eax
2f: 49 39 c4 cmp %rax,%r12
32: 73 21 jae 0x55
34: e8 78 4a f9 f7 call 0xf7f94ab1
39: e9 23 fe ff ff jmp 0xfffffe61
3e: 44 rex.R