------------[ cut here ]------------
WARNING: CPU: 0 PID: 4169 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4169 Comm: syz-executor Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 ad e2 d7 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 30 df d7 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:ffffc90000007998 EFLAGS: 00010246
RAX: ffffffff819fe2f0 RBX: 0000000000000000 RCX: ffff88807bf5bb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100f7eb771
R10: ffffed100f7eb771 R11: 1ffff1100f7eb770 R12: ffff88807bf5d308
R13: 00007ffffffff000 R14: ffffc90000007a08 R15: 0000000000000000
FS: 0000555565d8f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd209dbffb8 CR3: 00000000629a9000 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_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_3d2613b5dfc7747f+0x32/0x860
bpf_dispatcher_nop_func include/linux/bpf.h:790 [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:4549
security_task_free+0x97/0xc0 security/security.c:1691
__put_task_struct+0xf8/0x480 kernel/fork.c:757
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:unwind_next_frame+0x60/0x1d90 arch/x86/kernel/unwind_orc.c:-1
Code: 89 ef e8 93 d1 88 00 4c 8b 63 48 4c 8d 7b 38 4c 89 f8 48 c1 e8 03 48 89 44 24 40 42 80 3c 30 00 74 08 4c 89 ff e8 70 d1 88 00 <4c> 89 7c 24 38 4c 8b 6b 38 49 89 df 49 c1 ef 03 43 0f b6 04 37 84
RSP: 0018:ffffc900014df4e8 EFLAGS: 00000246
RAX: 1ffff9200029bebc RBX: ffffc900014df5a8 RCX: 0000000080000001
RDX: dffffc0000000000 RSI: ffffffff89a178c6 RDI: ffffc900014df5a8
RBP: ffffc900014df5f0 R08: ffffc900014df670 R09: 0000000000000011
R10: fffff5200029bec1 R11: 1ffff9200029bebf R12: ffffffff89a178c6
R13: ffff88805eb16d98 R14: dffffc0000000000 R15: ffffc900014df5e0
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kmem_cache_free+0x8f/0x210 mm/slub.c:3515
free_buffer_head+0x45/0xb0 fs/buffer.c:3327
try_to_free_buffers+0x3b4/0x4e0 fs/buffer.c:3268
invalidate_complete_page mm/truncate.c:203 [inline]
invalidate_inode_page+0x290/0x360 mm/truncate.c:255
__invalidate_mapping_pages+0x29f/0x5e0 mm/truncate.c:494
ext4_put_super+0x8cc/0xe00 fs/ext4/super.c:1255
generic_shutdown_super+0x130/0x300 fs/super.c:475
kill_block_super+0x7c/0xe0 fs/super.c:1427
deactivate_locked_super+0x93/0xf0 fs/super.c:335
cleanup_mnt+0x418/0x4d0 fs/namespace.c:1139
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 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: 0033:0x7fe94b0f7c57
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe1f1d9958 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fe94b178925 RCX: 00007fe94b0f7c57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe1f1d9a10
RBP: 00007ffe1f1d9a10 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe1f1daaa0
R13: 00007fe94b178925 R14: 000000000004f69b R15: 00007ffe1f1daae0
----------------
Code disassembly (best guess):
0: 89 ef mov %ebp,%edi
2: e8 93 d1 88 00 call 0x88d19a
7: 4c 8b 63 48 mov 0x48(%rbx),%r12
b: 4c 8d 7b 38 lea 0x38(%rbx),%r15
f: 4c 89 f8 mov %r15,%rax
12: 48 c1 e8 03 shr $0x3,%rax
16: 48 89 44 24 40 mov %rax,0x40(%rsp)
1b: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
20: 74 08 je 0x2a
22: 4c 89 ff mov %r15,%rdi
25: e8 70 d1 88 00 call 0x88d19a
* 2a: 4c 89 7c 24 38 mov %r15,0x38(%rsp) <-- trapping instruction
2f: 4c 8b 6b 38 mov 0x38(%rbx),%r13
33: 49 89 df mov %rbx,%r15
36: 49 c1 ef 03 shr $0x3,%r15
3a: 43 0f b6 04 37 movzbl (%r15,%r14,1),%eax
3f: 84 .byte 0x84