==================================================================
BUG: KASAN: stack-out-of-bounds in bpf_net_ctx_get_all_used_flush_lists include/linux/filter.h:837 [inline]
BUG: KASAN: stack-out-of-bounds in xdp_do_check_flushed+0x41c/0x4e0 net/core/filter.c:4305
Read of size 4 at addr ffffc9000348fa50 by task syz.3.1349/9437
CPU: 1 UID: 0 PID: 9437 Comm: syz.3.1349 Not tainted 6.11.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
bpf_net_ctx_get_all_used_flush_lists include/linux/filter.h:837 [inline]
xdp_do_check_flushed+0x41c/0x4e0 net/core/filter.c:4305
__napi_poll.constprop.0+0xd1/0x550 net/core/dev.c:6774
napi_poll net/core/dev.c:6840 [inline]
net_rx_action+0xa92/0x1010 net/core/dev.c:6962
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_call_function arch/x86/kernel/smp.c:257 [inline]
sysvec_call_function+0x95/0xb0 arch/x86/kernel/smp.c:257
asm_sysvec_call_function+0x1a/0x20 arch/x86/include/asm/idtentry.h:710
RIP: 0010:__orc_find+0xbf/0x130 arch/x86/kernel/unwind_orc.c:102
Code: 4c 89 fa 48 c1 ea 03 42 0f b6 0c 32 4c 89 fa 83 e2 07 83 c2 03 38 ca 7c 04 84 c9 75 73 49 63 17 4c 89 e7 4d 8d 2c 17 4c 89 ee fc b5 4d 00 4d 39 ec 73 95 e8 82 bb 4d 00 49 8d 6f fc e8 79 bb
RSP: 0018:ffffc9000348ee68 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffffff902aa4a8 RCX: 0000000000000000
RDX: fffffffff1aa33c3 RSI: ffffffff81d4d86f RDI: ffffffff81d4d808
RBP: ffffffff902aa4b4 R08: 0000000000000006 R09: ffffffff81d4d808
R10: ffffffff81d4d873 R11: 0000000000000000 R12: ffffffff81d4d808
R13: ffffffff81d4d86f R14: dffffc0000000000 R15: ffffffff902aa4ac
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x335/0x23a0 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_folios+0x9e9/0x1390 mm/page_alloc.c:2660
folios_put_refs+0x560/0x760 mm/swap.c:1039
free_pages_and_swap_cache+0x36d/0x510 mm/swap_state.c:332
__tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0xe9/0x590 mm/mmu_gather.c:373
zap_pte_range mm/memory.c:1697 [inline]
zap_pmd_range mm/memory.c:1736 [inline]
zap_pud_range mm/memory.c:1765 [inline]
zap_p4d_range mm/memory.c:1786 [inline]
unmap_page_range+0x1c88/0x3c10 mm/memory.c:1807
unmap_single_vma+0x194/0x2b0 mm/memory.c:1853
unmap_vmas+0x22f/0x490 mm/memory.c:1897
exit_mmap+0x1b8/0xb20 mm/mmap.c:3412
__mmput+0x12a/0x480 kernel/fork.c:1345
mmput+0x62/0x70 kernel/fork.c:1367
exit_mm kernel/exit.c:571 [inline]
do_exit+0x9bf/0x2bb0 kernel/exit.c:869
do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
get_signal+0x25fd/0x2770 kernel/signal.c:2917
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feaa1d77299
Code: Unable to access opcode bytes at 0x7feaa1d7726f.
RSP: 002b:00007feaa2ace0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007feaa1f06138 RCX: 00007feaa1d77299
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007feaa1f06138
RBP: 00007feaa1f06130 R08: 00007feaa2ace6c0 R09: 00007feaa2ace6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007feaa1f0613c
R13: 000000000000006e R14: 00007ffc1cbaaec0 R15: 00007ffc1cbaafa8
The buggy address belongs to stack of task syz.3.1349/9437
and is located at offset 24 in frame:
exit_mmap+0x0/0xb20 mm/mmap.c:3232
This frame has 2 objects:
[32, 96) 'vmi'
[128, 256) 'tlb'
The buggy address belongs to the virtual mapping at
[ffffc90003488000, ffffc90003491000) created by:
kernel_clone+0xfd/0x980 kernel/fork.c:2781
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88803f6761e0 pfn:0x3f676
memcg:ffff88801ec77982
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: ffff88803f6761e0 0000000000000000 00000001ffffffff ffff88801ec77982
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 9428, tgid 9428 (syz.3.1349), ts 208528123893, free_ts 208449520060
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493
prep_new_page mm/page_alloc.c:1501 [inline]
get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3442
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4700
alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2263
vm_area_alloc_pages mm/vmalloc.c:3584 [inline]
__vmalloc_area_node mm/vmalloc.c:3660 [inline]
__vmalloc_node_range_noprof+0xa6a/0x1520 mm/vmalloc.c:3841
alloc_thread_stack_node kernel/fork.c:313 [inline]
dup_task_struct kernel/fork.c:1113 [inline]
copy_process+0x2f3b/0x8de0 kernel/fork.c:2204
kernel_clone+0xfd/0x980 kernel/fork.c:2781
__do_sys_clone3+0x1f5/0x270 kernel/fork.c:3085
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 0 tgid 0 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2612
__folio_put+0x31c/0x3e0 mm/swap.c:128
folio_put include/linux/mm.h:1486 [inline]
free_page_and_swap_cache+0x249/0x2c0 mm/swap_state.c:308
__tlb_remove_table arch/x86/include/asm/tlb.h:34 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x89/0xe0 mm/mmu_gather.c:282
rcu_do_batch kernel/rcu/tree.c:2569 [inline]
rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2843
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffffc9000348f900: 00 f2 f2 f2 00 f2 f2 f2 00 00 f2 f2 00 00 00 00
ffffc9000348f980: 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00
>ffffc9000348fa00: 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00
^
ffffc9000348fa80: 00 00 00 f2 f2 f2 f2 00 00 00 00 00 00 00 00 00
ffffc9000348fb00: 00 00 00 00 00 00 00 f3 f3 f3 f3 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 4c 89 fa mov %r15,%rdx
3: 48 c1 ea 03 shr $0x3,%rdx
7: 42 0f b6 0c 32 movzbl (%rdx,%r14,1),%ecx
c: 4c 89 fa mov %r15,%rdx
f: 83 e2 07 and $0x7,%edx
12: 83 c2 03 add $0x3,%edx
15: 38 ca cmp %cl,%dl
17: 7c 04 jl 0x1d
19: 84 c9 test %cl,%cl
1b: 75 73 jne 0x90
1d: 49 63 17 movslq (%r15),%rdx
20: 4c 89 e7 mov %r12,%rdi
23: 4d 8d 2c 17 lea (%r15,%rdx,1),%r13
27: 4c 89 ee mov %r13,%rsi
* 2a: e8 fc b5 4d 00 call 0x4db62b <-- trapping instruction
2f: 4d 39 ec cmp %r13,%r12
32: 73 95 jae 0xffffffc9
34: e8 82 bb 4d 00 call 0x4dbbbb
39: 49 8d 6f fc lea -0x4(%r15),%rbp
3d: e8 .byte 0xe8
3e: 79 bb jns 0xfffffffb