==================================================================
BUG: KASAN: slab-use-after-free in bq_xmit_all+0x134/0x11d0 kernel/bpf/devmap.c:385
Read of size 8 at addr ffff888022842650 by task syz.4.110/5592
CPU: 1 UID: 0 PID: 5592 Comm: syz.4.110 Not tainted 6.10.0-next-20240725-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
bq_xmit_all+0x134/0x11d0 kernel/bpf/devmap.c:385
__dev_flush+0x81/0x160 kernel/bpf/devmap.c:425
xdp_do_check_flushed+0x129/0x240 net/core/filter.c:4300
__napi_poll+0xe4/0x490 net/core/dev.c:6774
napi_poll net/core/dev.c:6840 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:6962
handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
common_interrupt+0xaa/0xd0 arch/x86/kernel/irq.c:278
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: 89 fb e8 23 00 00 00 48 8b 3d ec 97 95 0c 48 89 de 5b e9 33 d2 5b 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 40 d7 03 00 65 8b 15 10 0c
RSP: 0018:ffffc900048f6ec0 EFLAGS: 00000293
RAX: ffffffff90934e1c RBX: ffffffff90934e20 RCX: ffff8880217c0000
RDX: ffff8880217c0000 RSI: ffffffff8bb95ee8 RDI: ffffffff8bb95e2b
RBP: ffffffff8bb95e2b R08: ffffffff81410c60 R09: ffffc900048f7090
R10: 0000000000000003 R11: ffffffff817f7030 R12: ffffffff90934e38
R13: ffffffff90934e24 R14: ffffffff8bb95ee8 R15: ffffffff90934e20
__orc_find arch/x86/kernel/unwind_orc.c:99 [inline]
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x531/0x2a00 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x76/0x430 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+0x103a/0x1b00 mm/page_alloc.c:2660
folios_put_refs+0x76e/0x860 mm/swap.c:1039
free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:332
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
exit_mmap+0x44f/0xc80 mm/mmap.c:3425
__mmput+0x115/0x390 kernel/fork.c:1347
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x27f0 kernel/exit.c:869
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x16a1/0x1740 kernel/signal.c:2917
arch_do_signal_or_restart+0x96/0x830 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+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8055f75f19
Code: Unable to access opcode bytes at 0x7f8055f75eef.
RSP: 002b:00007f8056c650f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f8056105f68 RCX: 00007f8055f75f19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8056105f68
RBP: 00007f8056105f60 R08: 00007f8056c656c0 R09: 00007f8056c656c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8056105f6c
R13: 000000000000000b R14: 00007ffc480c38a0 R15: 00007ffc480c3988
Allocated by task 5586:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3988 [inline]
slab_alloc_node mm/slub.c:4037 [inline]
kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044
vm_area_alloc+0x24/0x1d0 kernel/fork.c:472
mmap_region+0xc3d/0x2090 mm/mmap.c:2944
do_mmap+0x8f9/0x1010 mm/mmap.c:1468
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588
ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5586:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kmem_cache_free+0x145/0x350 mm/slub.c:4548
remove_vma mm/mmap.c:187 [inline]
exit_mmap+0x645/0xc80 mm/mmap.c:3436
__mmput+0x115/0x390 kernel/fork.c:1347
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x27f0 kernel/exit.c:869
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
__do_sys_exit_group kernel/exit.c:1042 [inline]
__se_sys_exit_group kernel/exit.c:1040 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880228425d0
which belongs to the cache vm_area_struct of size 184
The buggy address is located 128 bytes inside of
freed 184-byte region [ffff8880228425d0, ffff888022842688)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22842
memcg:ffff888012069701
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000000 ffff8880166fdb40 0000000000000000 0000000000000001
raw: 0000000000000000 0000000000100010 00000001fdffffff ffff888012069701
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5196, tgid 5196 (dhcpcd-run-hook), ts 59866595128, free_ts 59860152954
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
prep_new_page mm/page_alloc.c:1501 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x5f/0x120 mm/slub.c:2321
allocate_slab+0x5a/0x2f0 mm/slub.c:2484
new_slab mm/slub.c:2537 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
__slab_alloc+0x58/0xa0 mm/slub.c:3813
__slab_alloc_node mm/slub.c:3866 [inline]
slab_alloc_node mm/slub.c:4025 [inline]
kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4044
vm_area_dup+0x27/0x290 kernel/fork.c:487
dup_mmap kernel/fork.c:696 [inline]
dup_mm kernel/fork.c:1674 [inline]
copy_mm+0xc7b/0x1f30 kernel/fork.c:1723
copy_process+0x186b/0x3d90 kernel/fork.c:2376
kernel_clone+0x226/0x8f0 kernel/fork.c:2788
__do_sys_clone kernel/fork.c:2931 [inline]
__se_sys_clone kernel/fork.c:2915 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2915
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5201 tgid 5201 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_folios+0x103a/0x1b00 mm/page_alloc.c:2660
folios_put_refs+0x76e/0x860 mm/swap.c:1039
free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:332
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
exit_mmap+0x44f/0xc80 mm/mmap.c:3425
__mmput+0x115/0x390 kernel/fork.c:1347
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x27f0 kernel/exit.c:869
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
__do_sys_exit_group kernel/exit.c:1042 [inline]
__se_sys_exit_group kernel/exit.c:1040 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888022842500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888022842580: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb
>ffff888022842600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888022842680: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00
ffff888022842700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 89 fb mov %edi,%ebx
2: e8 23 00 00 00 call 0x2a
7: 48 8b 3d ec 97 95 0c mov 0xc9597ec(%rip),%rdi # 0xc9597fa
e: 48 89 de mov %rbx,%rsi
11: 5b pop %rbx
12: e9 33 d2 5b 00 jmp 0x5bd24a
17: 0f 1f 00 nopl (%rax)
1a: 90 nop
1b: 90 nop
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 90 nop
23: 90 nop
24: 90 nop
25: 90 nop
26: 90 nop
27: 90 nop
28: 90 nop
29: 90 nop
* 2a: f3 0f 1e fa endbr64 <-- trapping instruction
2e: 48 8b 04 24 mov (%rsp),%rax
32: 65 48 8b 0c 25 40 d7 mov %gs:0x3d740,%rcx
39: 03 00
3b: 65 gs
3c: 8b .byte 0x8b
3d: 15 .byte 0x15
3e: 10 .byte 0x10
3f: 0c .byte 0xc