------------[ cut here ]------------
WARNING: CPU: 1 PID: 4321 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4321 Comm: syz.4.12 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:ffffc90000dd0978 EFLAGS: 00010246
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff88807d20bb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100fa41771
R10: ffffed100fa41771 R11: 1ffff1100fa41770 R12: ffff88807d20d308
R13: 00007ffffffff000 R14: ffffc90000dd09e8 R15: 0000000000000000
FS: 00007f83fbcea6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83fbce9f98 CR3: 000000001f7e1000 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_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_ee60aafa828f4cb7+0x35/0xf0
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
__bpf_trace_kfree+0x6e/0x90 include/trace/events/kmem.h:118
trace_kfree include/trace/events/kmem.h:118 [inline]
kfree+0x25f/0x2a0 mm/slub.c:4554
ip_dst_metrics_put include/net/ip.h:516 [inline]
ip6_dst_destroy+0x96/0x240 net/ipv6/route.c:360
dst_destroy+0xc0/0x2e0 net/core/dst.c:112
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:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x77/0x290 mm/kasan/generic.c:189
Code: 0c 03 48 8d 5c 37 ff 48 c1 eb 03 4e 8d 14 3b 4d 89 d6 4d 29 ce 49 83 fe 10 7f 26 4d 85 f6 0f 84 39 01 00 00 48 f7 d3 4c 01 db <41> 80 39 00 0f 85 c1 01 00 00 49 ff c1 48 ff c3 75 ee e9 1c 01 00
RSP: 0018:ffffc9000318fb20 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff815bf8eb
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d6991e8
RBP: ffffc9000318fc58 R08: dffffc0000000000 R09: fffffbfff1ad323d
R10: fffffbfff1ad323e R11: 1ffffffff1ad323d R12: ffffffff8c11c660
R13: 1ffff92000631f74 R14: 0000000000000001 R15: dffffc0000000001
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0xbb/0x3f0 kernel/locking/lockdep.c:5594
rcu_lock_acquire+0x20/0x30 include/linux/rcupdate.h:312
rcu_read_lock include/linux/rcupdate.h:739 [inline]
percpu_ref_get_many include/linux/percpu-refcount.h:202 [inline]
percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
obj_cgroup_get include/linux/memcontrol.h:805 [inline]
memcg_slab_post_alloc_hook mm/slab.h:320 [inline]
slab_post_alloc_hook+0x191/0x380 mm/slab.h:526
slab_alloc_node mm/slub.c:3225 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x100/0x290 mm/slub.c:3238
sk_prot_alloc+0x57/0x210 net/core/sock.c:1858
sk_alloc+0x2f/0x310 net/core/sock.c:1917
unix_create1+0xb0/0x610 net/unix/af_unix.c:-1
unix_create+0x143/0x1f0 net/unix/af_unix.c:929
__sock_create+0x47b/0x900 net/socket.c:1486
sock_create net/socket.c:1542 [inline]
__sys_socket+0xe2/0x170 net/socket.c:1584
__do_sys_socket net/socket.c:1593 [inline]
__se_sys_socket net/socket.c:1591 [inline]
__x64_sys_socket+0x76/0x80 net/socket.c:1591
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: 0033:0x7f83fdaa3ec9
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:00007f83fbcea038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f83fdcfb090 RCX: 00007f83fdaa3ec9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f83fdb26f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83fdcfb128 R14: 00007f83fdcfb090 R15: 00007ffc37ce3238
----------------
Code disassembly (best guess):
0: 0c 03 or $0x3,%al
2: 48 8d 5c 37 ff lea -0x1(%rdi,%rsi,1),%rbx
7: 48 c1 eb 03 shr $0x3,%rbx
b: 4e 8d 14 3b lea (%rbx,%r15,1),%r10
f: 4d 89 d6 mov %r10,%r14
12: 4d 29 ce sub %r9,%r14
15: 49 83 fe 10 cmp $0x10,%r14
19: 7f 26 jg 0x41
1b: 4d 85 f6 test %r14,%r14
1e: 0f 84 39 01 00 00 je 0x15d
24: 48 f7 d3 not %rbx
27: 4c 01 db add %r11,%rbx
* 2a: 41 80 39 00 cmpb $0x0,(%r9) <-- trapping instruction
2e: 0f 85 c1 01 00 00 jne 0x1f5
34: 49 ff c1 inc %r9
37: 48 ff c3 inc %rbx
3a: 75 ee jne 0x2a
3c: e9 .byte 0xe9
3d: 1c 01 sbb $0x1,%al