------------[ cut here ]------------
WARNING: CPU: 1 PID: 10517 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 10517 Comm: syz.4.1946 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 94 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 00 91 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: 0000:ffffc90000dd0d40 EFLAGS: 00010006
RAX: ffffffff81a07ea0 RBX: 0000000000000000 RCX: ffff88801dd9d940
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: 1ffffffff2037218
R10: dffffc0000000000 R11: fffffbfff2037219 R12: ffff88801dd9f0c8
R13: dffffc0000000000 R14: ffffc90000dd0da8 R15: 0000000000000000
FS: 00007fdfd54006c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdfd53ffff8 CR3: 000000007bad3000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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+0x34/0x150
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+0x163/0x2e0 kernel/trace/bpf_trace.c:1915
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
flush_tlb_func+0x4c7/0x5b0 arch/x86/mm/tlb.c:855
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:lock_acquire+0x208/0x400 kernel/locking/lockdep.c:5627
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3d 04 f8 0f 85 f1 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 43 c7 44 3d 08 00 00 00 00 65 48 8b 04
RSP: 0000:ffffc9000306f9e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: e6a167fa45977200
RDX: 0000000000000000 RSI: ffffffff8a2b2ea0 RDI: ffffffff8a79ec00
RBP: ffffc9000306faf8 R08: dffffc0000000000 R09: 1ffffffff203721a
R10: dffffc0000000000 R11: fffffbfff203721b R12: ffffffff8c3ecd80
R13: 1ffff9200060df48 R14: 0000000000000246 R15: dffffc0000000000
fs_reclaim_acquire+0x91/0x100 mm/page_alloc.c:4597
might_alloc include/linux/sched/mm.h:206 [inline]
slab_pre_alloc_hook+0x20/0xc0 mm/slab.h:492
slab_alloc_node mm/slub.c:3139 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x3d/0x290 mm/slub.c:3238
ptlock_alloc+0x1c/0x60 mm/memory.c:5556
ptlock_init include/linux/mm.h:2241 [inline]
pgtable_pte_page_ctor include/linux/mm.h:2268 [inline]
__pte_alloc_one include/asm-generic/pgalloc.h:66 [inline]
pte_alloc_one+0xc0/0x310 arch/x86/mm/pgtable.c:33
__pte_alloc+0x21/0x150 mm/memory.c:439
do_anonymous_page mm/memory.c:3806 [inline]
handle_pte_fault mm/memory.c:4648 [inline]
__handle_mm_fault mm/memory.c:4785 [inline]
handle_mm_fault+0x39b6/0x4410 mm/memory.c:4883
do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357
handle_page_fault arch/x86/mm/fault.c:1445 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7fdfd715329f
Code: b0 00 00 00 0f 29 bc 24 c0 00 00 00 64 48 8b 04 25 28 00 00 00 48 89 44 24 18 31 c0 48 8d 84 24 e0 00 00 00 45 31 c0 48 89 e1 <48> 89 44 24 08 48 8d 44 24 20 c7 04 24 18 00 00 00 c7 44 24 04 30
RSP: 002b:00007fdfd53ffff0 EFLAGS: 00010246
RAX: 00007fdfd54000d0 RBX: 0000000000020000 RCX: 00007fdfd53ffff0
RDX: 00007fdfd7252fef RSI: 0000000000000023 RDI: 00007fdfd54000d0
RBP: 00007fdfd53e1000 R08: 0000000000000000 R09: 00007ffdc0e05267
R10: 0000000000000008 R11: 0000000000000202 R12: 00007fdfd54000d0
R13: 000000000000000b R14: 00007ffdc0e05180 R15: 00007ffdc0e05268
----------------
Code disassembly (best guess):
0: f7 84 24 80 00 00 00 testl $0x200,0x80(%rsp)
7: 00 02 00 00
b: 43 c6 44 3d 04 f8 movb $0xf8,0x4(%r13,%r15,1)
11: 0f 85 f1 00 00 00 jne 0x108
17: 41 f7 c6 00 02 00 00 test $0x200,%r14d
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp)
28: e0 45
* 2a: 4b c7 44 3d 00 00 00 movq $0x0,0x0(%r13,%r15,1) <-- trapping instruction
31: 00 00
33: 43 c7 44 3d 08 00 00 movl $0x0,0x8(%r13,%r15,1)
3a: 00 00
3c: 65 gs
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 04 .byte 0x4