------------[ cut here ]------------
WARNING: CPU: 0 PID: 4660 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4660 Comm: syz.4.125 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 0d 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 90 f2 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:ffffc90000007a08 EFLAGS: 00010246
RAX: ffffffff819ed980 RBX: 0000000000000000 RCX: ffff88802212d940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff5419
R10: fffffbfff1ff5419 R11: 1ffffffff1ff5418 R12: ffff88802212f0c8
R13: 1ffff92000000f50 R14: ffffc90000007a68 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd97c093000 CR3: 0000000064fee000 CR4: 00000000003506f0
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_690f12e098ef46de+0x32/0xa8
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_run3+0x17e/0x320 kernel/trace/bpf_trace.c:1916
__bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
kmem_cache_free+0x1e7/0x210 mm/slub.c:3521
rcu_do_batch kernel/rcu/tree.c:2523 [inline]
rcu_core+0x962/0x15d0 kernel/rcu/tree.c:2763
handle_softirqs+0x328/0x820 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:172 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x60 kernel/kcov.c:206
Code: 89 fb e8 17 00 00 00 48 8b 3d d0 6b f1 0b 48 89 de 5b e9 d7 9e 43 00 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d a4 a3 8a 7e <65> 8b 15 a5 a3 8a 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc900034ff3f8 EFLAGS: 00000246
RAX: ffffffff81a12d0e RBX: 0000000000000000 RCX: ffff88802212d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900034ff510 R08: dffffc0000000000 R09: fffff9400032d06f
R10: fffff9400032d06f R11: 1ffffd400032d06e R12: dffffc0000000000
R13: 0000000000000000 R14: ffffea0001968380 R15: ffffc900034ff480
_compound_head include/linux/page-flags.h:198 [inline]
release_pages+0x1be/0x1bb0 mm/swap.c:907
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
tlb_flush_mmu+0xc5/0x170 mm/mmu_gather.c:247
zap_pte_range mm/memory.c:1456 [inline]
zap_pmd_range mm/memory.c:1505 [inline]
zap_pud_range mm/memory.c:1534 [inline]
zap_p4d_range mm/memory.c:1555 [inline]
unmap_page_range+0x2096/0x2520 mm/memory.c:1576
unmap_vmas+0x11b/0x230 mm/memory.c:1653
exit_mmap+0x38f/0x5f0 mm/mmap.c:3216
__mmput+0x115/0x3b0 kernel/fork.c:1127
exit_mm+0x567/0x6c0 kernel/exit.c:550
do_exit+0x5a1/0x20a0 kernel/exit.c:870
do_group_exit+0x12e/0x300 kernel/exit.c:997
get_signal+0x6ca/0x12c0 kernel/signal.c:2900
arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0b12a8e749
Code: Unable to access opcode bytes at RIP 0x7f0b12a8e71f.
RSP: 002b:00007f0b10cd40e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f0b12ce5098 RCX: 00007f0b12a8e749
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f0b12ce509c
RBP: 00007f0b12ce5090 R08: 001537ed164a5000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0b12ce5128 R14: 00007ffc71f9cb10 R15: 00007ffc71f9cbf8
----------------
Code disassembly (best guess):
0: 89 fb mov %edi,%ebx
2: e8 17 00 00 00 call 0x1e
7: 48 8b 3d d0 6b f1 0b mov 0xbf16bd0(%rip),%rdi # 0xbf16bde
e: 48 89 de mov %rbx,%rsi
11: 5b pop %rbx
12: e9 d7 9e 43 00 jmp 0x439eee
17: 00 00 add %al,(%rax)
19: cc int3
1a: cc int3
1b: 00 00 add %al,(%rax)
1d: cc int3
1e: 48 8b 04 24 mov (%rsp),%rax
22: 65 48 8b 0d a4 a3 8a mov %gs:0x7e8aa3a4(%rip),%rcx # 0x7e8aa3ce
29: 7e
* 2a: 65 8b 15 a5 a3 8a 7e mov %gs:0x7e8aa3a5(%rip),%edx # 0x7e8aa3d6 <-- trapping instruction
31: 81 e2 00 01 ff 00 and $0xff0100,%edx
37: 74 11 je 0x4a
39: 81 fa 00 01 00 00 cmp $0x100,%edx
3f: 75 .byte 0x75