------------[ cut here ]------------
WARNING: CPU: 1 PID: 4482 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4482 Comm: syz.4.42 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:ffffc90000dd09f8 EFLAGS: 00010246
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff888023ec8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10047d9001
R10: ffffed10047d9001 R11: 1ffff110047d9000 R12: ffff888023ec9788
R13: 00007ffffffff000 R14: ffffc90000dd0a68 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000029a3a000 CR4: 00000000003526e0
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_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_ea44d77e194c9431+0x35/0x9c8
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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194
Code: 74 05 e8 5e 8d cb f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 c6 15 9f f7 65 8b 05 a7 13 50 76 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc90003c270e0 EFLAGS: 00000206
RAX: be8ffa1f49c3c000 RBX: 0000000000000a02 RCX: be8ffa1f49c3c000
RDX: dffffc0000000000 RSI: ffffffff8a0b1820 RDI: 0000000000000001
RBP: ffffc90003c27160 R08: dffffc0000000000 R09: fffffbfff1ff781a
R10: fffffbfff1ff781a R11: 1ffffffff1ff7819 R12: dffffc0000000000
R13: ffff88813fe71dc0 R14: ffff88813fe727d0 R15: 1ffff92000784e1c
try_to_wake_up+0x69d/0x1050 kernel/sched/core.c:4167
wake_up_process kernel/sched/core.c:4234 [inline]
wake_up_q+0x78/0xc0 kernel/sched/core.c:953
rwsem_wake+0xe9/0x130 kernel/locking/rwsem.c:1203
kernfs_drain fs/kernfs/dir.c:475 [inline]
__kernfs_remove+0x583/0xc50 fs/kernfs/dir.c:1372
kernfs_remove_by_name_ns+0x91/0x100 fs/kernfs/dir.c:1566
kernfs_remove_by_name include/linux/kernfs.h:598 [inline]
remove_files fs/sysfs/group.c:28 [inline]
sysfs_remove_group+0xf8/0x290 fs/sysfs/group.c:289
sysfs_remove_groups+0x50/0xa0 fs/sysfs/group.c:313
__kobject_del+0x84/0x2f0 lib/kobject.c:619
kobject_cleanup lib/kobject.c:704 [inline]
kobject_release lib/kobject.c:744 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x235/0x460 lib/kobject.c:761
net_rx_queue_update_kobjects+0x420/0x490 net/core/net-sysfs.c:1124
remove_queue_kobjects net/core/net-sysfs.c:1822 [inline]
netdev_unregister_kobject+0x111/0x250 net/core/net-sysfs.c:1976
unregister_netdevice_many+0x141e/0x18f0 net/core/dev.c:11161
unregister_netdevice_queue net/core/dev.c:11067 [inline]
unregister_netdevice include/linux/netdevice.h:3020 [inline]
unregister_netdev+0x140/0x1b0 net/core/dev.c:11193
tty_ldisc_kill+0xa6/0x1a0 drivers/tty/tty_ldisc.c:629
tty_ldisc_release+0x1a0/0x200 drivers/tty/tty_ldisc.c:803
tty_release_struct+0x26/0xd0 drivers/tty/tty_io.c:1708
tty_release+0xd0c/0x16c0 drivers/tty/tty_io.c:1880
__fput+0x234/0x930 fs/file_table.c:311
task_work_run+0x125/0x1a0 kernel/task_work.c:188
exit_task_work include/linux/task_work.h:33 [inline]
do_exit+0x61e/0x20a0 kernel/exit.c:883
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
ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:280
RIP: 0033:0x7fe68924d409
Code: Unable to access opcode bytes at RIP 0x7fe68924d3df.
RSP: 002b:00007fe68743e1c0 EFLAGS: 00000202 ORIG_RAX: 00000000000001b3
RAX: 0000000000000000 RBX: 00007fe6891cf820 RCX: 00007fe68924d409
RDX: 00007fe6891cf820 RSI: 0000000000000058 RDI: 00007ffce0683130
RBP: 00007fe68743e6c0 R08: 00007fe68743e6c0 R09: 00007ffce0683217
R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffa8
R13: 000000000000006e R14: 00007ffce0683130 R15: 00007ffce0683218
----------------
Code disassembly (best guess):
0: 74 05 je 0x7
2: e8 5e 8d cb f7 call 0xf7cb8d65
7: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp)
e: 00 00
10: 9c pushf
11: 8f 44 24 20 pop 0x20(%rsp)
15: f6 44 24 21 02 testb $0x2,0x21(%rsp)
1a: 75 4b jne 0x67
1c: f7 c3 00 02 00 00 test $0x200,%ebx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 c6 15 9f f7 call 0xf79f15f5 <-- trapping instruction
2f: 65 8b 05 a7 13 50 76 mov %gs:0x765013a7(%rip),%eax # 0x765013dd
36: 85 c0 test %eax,%eax
38: 74 3c je 0x76
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss