------------[ cut here ]------------
WARNING: CPU: 1 PID: 144 at mm/maccess.c:226 copy_from_user_nofault+0x15c/0x1c0
Modules linked in:
CPU: 1 PID: 144 Comm: kworker/u4:1 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:copy_from_user_nofault+0x15c/0x1c0 mm/maccess.c:226
Code: db 48 c7 c0 f2 ff ff ff 48 0f 44 c5 eb 0c e8 9b b0 d5 ff 48 c7 c0 f2 ff ff ff 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 84 b0 d5 ff <0f> 0b e9 1e ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c ef fe ff
RSP: 0018:ffffc90000dcf080 EFLAGS: 00010006
RAX: ffffffff81aaec3c RBX: 0000000000000000 RCX: ffff88801c610000
RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff81aaeb4d R09: ffffed100e993738
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000008 R14: 0000000000000000 R15: ffffc90000dcf0e8
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000c88e000 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_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_87c4e24aeb87061a+0x5b/0x34c
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+0x19e/0x340 kernel/trace/bpf_trace.c:1915
__traceiter_tlb_flush+0x6c/0xc0 include/trace/events/tlb.h:38
trace_tlb_flush+0xed/0x110 include/trace/events/tlb.h:38
switch_mm_irqs_off+0x748/0xa30
flush_tlb_func+0x208/0x590 arch/x86/mm/tlb.c:769
flush_smp_call_function_queue+0x2b5/0x760 kernel/smp.c:628
__sysvec_call_function_single+0x9a/0x250 arch/x86/kernel/smp.c:248
instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline]
sysvec_call_function_single+0x4a/0xc0 arch/x86/kernel/smp.c:243
asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:58 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:347 [inline]
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:357 [inline]
RIP: 0010:unwind_next_frame+0xac4/0x1fa0 arch/x86/kernel/unwind_orc.c:539
Code: c1 e8 03 80 3c 10 00 74 0f e8 78 cb 91 00 48 ba 00 00 00 00 00 fc ff df 48 89 5c 24 58 49 8b 6f 10 48 8b 44 24 38 0f b6 04 10 <84> c0 0f 85 80 0f 00 00 48 8b 04 24 48 8d 58 f8 41 83 3f 00 74 18
RSP: 0018:ffffc90000dcf528 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8e91f963 RCX: ffffffff8e23b54c
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffc90000dcf5f0
RBP: ffffc90001750000 R08: 0000000000000001 R09: ffffc90000dcf6d0
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1d23f2c
R13: 1ffffffff1d23f2c R14: ffffc90001748000 R15: ffffc90000dcf5e0
arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 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+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xf1/0x270 mm/slub.c:4559
skb_free_head net/core/skbuff.c:655 [inline]
skb_release_data+0x73a/0x8a0 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb+0x4c/0x60 net/core/skbuff.c:756
tcp_clean_rtx_queue net/ipv4/tcp_input.c:3395 [inline]
tcp_ack+0x233a/0x6b70 net/ipv4/tcp_input.c:3952
tcp_rcv_established+0xf3c/0x1e30 net/ipv4/tcp_input.c:5965
tcp_v4_do_rcv+0x423/0x970 net/ipv4/tcp_ipv4.c:1731
tcp_v4_rcv+0x27be/0x2de0 net/ipv4/tcp_ipv4.c:2143
ip_protocol_deliver_rcu+0x386/0x740 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x1db/0x320 net/ipv4/ip_input.c:231
NF_HOOK+0x364/0x410 include/linux/netfilter.h:302
dst_input include/net/dst.h:462 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:577 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:628 [inline]
ip_sublist_rcv+0xb0f/0xe50 net/ipv4/ip_input.c:636
ip_list_rcv+0x427/0x470 net/ipv4/ip_input.c:671
__netif_receive_skb_list_ptype net/core/dev.c:5567 [inline]
__netif_receive_skb_list_core+0x6b1/0x890 net/core/dev.c:5615
__netif_receive_skb_list net/core/dev.c:5667 [inline]
netif_receive_skb_list_internal+0x9ed/0xdf0 net/core/dev.c:5758
gro_normal_list net/core/dev.c:5912 [inline]
napi_complete_done+0x352/0x820 net/core/dev.c:6650
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0xbd1/0x1260 drivers/net/virtio_net.c:1592
__napi_poll+0xc7/0x440 net/core/dev.c:7074
napi_poll net/core/dev.c:7141 [inline]
net_rx_action+0x617/0xda0 net/core/dev.c:7231
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
__do_softirq kernel/softirq.c:592 [inline]
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
common_interrupt+0xb3/0xd0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
RIP: 0010:PageCompound include/linux/page-flags.h:212 [inline]
RIP: 0010:PageHuge+0x26/0x130 mm/hugetlb.c:1742
Code: 00 0f 1f 00 41 57 41 56 41 54 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 17 73 bb ff 4c 89 f7 be 08 00 00 00 e8 ea 66 05 00 <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 44 65 05 00
RSP: 0018:ffffc9000174eb88 EFLAGS: 00000256
RAX: ffffffff81c52901 RBX: 0000000000000000 RCX: ffffffff81c529b6
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0001e72d80
RBP: 1ffffd40003ce5b1 R08: dffffc0000000000 R09: fffff940003ce5b1
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffea0001e72d80 R14: ffffea0001e72d80 R15: dffffc0000000000
page_to_pgoff include/linux/pagemap.h:545 [inline]
vma_address+0xa3/0x440 mm/internal.h:414
rmap_walk_file+0x2f8/0x600 mm/rmap.c:2370
rmap_walk mm/rmap.c:2396 [inline]
page_mkclean+0x330/0x490 mm/rmap.c:1006
clear_page_dirty_for_io+0x3ce/0xa60 mm/page-writeback.c:2749
mpage_submit_page+0x90/0x230 fs/ext4/inode.c:2092
mpage_map_and_submit_buffers fs/ext4/inode.c:2360 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2499 [inline]
ext4_writepages+0x204f/0x3d10 fs/ext4/inode.c:2828
do_writepages+0x481/0x730 mm/page-writeback.c:2386
__writeback_single_inode+0x15b/0xe30 fs/fs-writeback.c:1647
writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1930
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:2001
wb_writeback+0x465/0xc50 fs/fs-writeback.c:2106
wb_check_old_data_flush fs/fs-writeback.c:2206 [inline]
wb_do_writeback fs/fs-writeback.c:2259 [inline]
wb_workfn+0xc55/0x1130 fs/fs-writeback.c:2288
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
----------------
Code disassembly (best guess):
0: c1 e8 03 shr $0x3,%eax
3: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1)
7: 74 0f je 0x18
9: e8 78 cb 91 00 call 0x91cb86
e: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
15: fc ff df
18: 48 89 5c 24 58 mov %rbx,0x58(%rsp)
1d: 49 8b 6f 10 mov 0x10(%r15),%rbp
21: 48 8b 44 24 38 mov 0x38(%rsp),%rax
26: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 80 0f 00 00 jne 0xfb2
32: 48 8b 04 24 mov (%rsp),%rax
36: 48 8d 58 f8 lea -0x8(%rax),%rbx
3a: 41 83 3f 00 cmpl $0x0,(%r15)
3e: 74 18 je 0x58