------------[ cut here ]------------
WARNING: CPU: 1 PID: 4396 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4396 Comm: syz.4.34 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 3d f7 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 c0 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:ffffc90000dd08b0 EFLAGS: 00010046
RAX: ffffffff819ed760 RBX: 0000000000000000 RCX: ffff88802a16d940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100542db29
R10: ffffed100542db29 R11: 1ffff1100542db28 R12: ffff88802a16f0c8
R13: 00007ffffffff000 R14: ffffc90000dd08e8 R15: 0000000020000000
FS: 00007f7c864916c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000001 CR3: 0000000062de6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_8fc34fd13f997abc+0x3d/0xe78
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
trace_percpu_free_percpu+0x14c/0x1a0 include/trace/events/percpu.h:43
free_percpu+0x876/0xd90 mm/percpu.c:2306
fib_nh_common_release+0x106/0x2c0 net/ipv4/fib_semantics.c:215
fib_nh_release net/ipv4/fib_semantics.c:227 [inline]
free_fib_info_rcu+0xd2/0x300 net/ipv4/fib_semantics.c:239
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:put_cpu_partial+0x15e/0x190 mm/slub.c:2591
Code: 00 00 48 3b 44 24 08 75 4d 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 0f 29 ed 07 41 f7 c5 00 02 00 00 74 c3 fb 4d 85 ff <75> c2 eb cb 48 c7 c7 70 fc 1e 8c 4c 89 e6 e8 7f f0 3e 02 e9 e5 fe
RSP: 0018:ffffc9000338f7b8 EFLAGS: 00000246
RAX: 6da5a4a84375ef00 RBX: ffff888016841500 RCX: 6da5a4a84375ef00
RDX: dffffc0000000000 RSI: ffffffff8a0b1820 RDI: ffffffff8a59a480
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1ad323e
R10: fffffbfff1ad323e R11: 1ffffffff1ad323d R12: 0000000000000001
R13: 0000000000000286 R14: ffff8880b913dd30 R15: 0000000000000000
qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
slab_alloc mm/slub.c:3233 [inline]
__kmalloc+0x127/0x330 mm/slub.c:4408
kmalloc include/linux/slab.h:609 [inline]
tomoyo_realpath_from_path+0x118/0x610 security/tomoyo/realpath.c:254
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x1d5/0x5d0 security/tomoyo/file.c:723
security_file_ioctl+0x6c/0xa0 security/security.c:1555
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x48/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7c8824ac29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7c86491038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7c88492090 RCX: 00007f7c8824ac29
RDX: 00f0ff1f00000000 RSI: 0000000040047452 RDI: 0000000000000008
RBP: 00007f7c882cde41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7c88492128 R14: 00007f7c88492090 R15: 00007ffe2685f708
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 48 3b 44 24 08 cmp 0x8(%rsp),%rax
7: 75 4d jne 0x56
9: 48 83 c4 10 add $0x10,%rsp
d: 5b pop %rbx
e: 41 5c pop %r12
10: 41 5d pop %r13
12: 41 5e pop %r14
14: 41 5f pop %r15
16: 5d pop %rbp
17: c3 ret
18: e8 0f 29 ed 07 call 0x7ed292c
1d: 41 f7 c5 00 02 00 00 test $0x200,%r13d
24: 74 c3 je 0xffffffe9
26: fb sti
27: 4d 85 ff test %r15,%r15
* 2a: 75 c2 jne 0xffffffee <-- trapping instruction
2c: eb cb jmp 0xfffffff9
2e: 48 c7 c7 70 fc 1e 8c mov $0xffffffff8c1efc70,%rdi
35: 4c 89 e6 mov %r12,%rsi
38: e8 7f f0 3e 02 call 0x23ef0bc
3d: e9 .byte 0xe9
3e: e5 fe in $0xfe,%eax