eth0: bad gso: type: 1, size: 1408
==================================================================
BUG: KASAN: slab-use-after-free in bq_xmit_all+0x134/0x11d0 kernel/bpf/devmap.c:385
Read of size 8 at addr ffff88802b618178 by task syz.4.496/7925
CPU: 0 UID: 0 PID: 7925 Comm: syz.4.496 Not tainted 6.10.0-rc7-next-20240712-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:207
Code: 40 d7 03 00 65 8b 15 40 0c 70 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc
RSP: 0018:ffffc9000396ef70 EFLAGS: 00000246
RAX: ffffffff81410601 RBX: ffffc9000396efe8 RCX: ffff88802a618000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff814105f8 R09: ffffffff814120bf
R10: 0000000000000003 R11: ffff88802a618000 R12: ffff88802a618000
R13: ffffffff817f7110 R14: dffffc0000000000 R15: 1ffff9200072ddfd
unwind_get_return_address+0x71/0xc0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x75/0x3f0 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:2692
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: 0033:0x7f8d4ff75bd9
Code: Unable to access opcode bytes at 0x7f8d4ff75baf.
RSP: 002b:00007f8d50cbb0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f8d50104040 RCX: 00007f8d4ff75bd9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8d50104040
RBP: 00007f8d50104038 R08: 00007f8d50cbb6c0 R09: 00007f8d50cbb6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8d50104044
R13: 000000000000006e R14: 00007ffd16601240 R15: 00007ffd16601328
Allocated by task 7896:
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_dup+0x27/0x290 kernel/fork.c:487
__split_vma+0x1a9/0xc30 mm/mmap.c:2465
split_vma mm/mmap.c:2537 [inline]
vma_modify+0x268/0x350 mm/mmap.c:2578
vma_modify_flags include/linux/mm.h:3312 [inline]
mprotect_fixup+0x3ea/0xa90 mm/mprotect.c:639
do_mprotect_pkey+0x908/0xe00 mm/mprotect.c:822
__do_sys_mprotect mm/mprotect.c:843 [inline]
__se_sys_mprotect mm/mprotect.c:840 [inline]
__x64_sys_mprotect+0x80/0x90 mm/mprotect.c:840
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 7900:
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
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
The buggy address belongs to the object at ffff88802b6180f8
which belongs to the cache vm_area_struct of size 184
The buggy address is located 128 bytes inside of
freed 184-byte region [ffff88802b6180f8, ffff88802b6181b0)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b618
memcg:ffff88806dcede01
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000000 ffff888015eefb40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000001fdffffff ffff88806dcede01
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 7896, tgid 7896 (syz.1.493), ts 208824728543, free_ts 208810476949
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+0x2ccb/0x2d80 mm/page_alloc.c:3474
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4732
__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
__split_vma+0x1a9/0xc30 mm/mmap.c:2465
split_vma mm/mmap.c:2537 [inline]
vma_modify+0x194/0x350 mm/mmap.c:2571
vma_modify_flags include/linux/mm.h:3312 [inline]
mprotect_fixup+0x3ea/0xa90 mm/mprotect.c:639
do_mprotect_pkey+0x908/0xe00 mm/mprotect.c:822
__do_sys_mprotect mm/mprotect.c:843 [inline]
__se_sys_mprotect mm/mprotect.c:840 [inline]
__x64_sys_mprotect+0x80/0x90 mm/mprotect.c:840
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 7898 tgid 7898 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2644
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x11f/0x200 mm/mmu_gather.c:468
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:
ffff88802b618000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802b618080: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa
>ffff88802b618100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802b618180: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00
ffff88802b618200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 40 d7 rex xlat %ds:(%rbx)
2: 03 00 add (%rax),%eax
4: 65 8b 15 40 0c 70 7e mov %gs:0x7e700c40(%rip),%edx # 0x7e700c4b
b: f7 c2 00 01 ff 00 test $0xff0100,%edx
11: 74 11 je 0x24
13: f7 c2 00 01 00 00 test $0x100,%edx
19: 74 35 je 0x50
1b: 83 b9 1c 16 00 00 00 cmpl $0x0,0x161c(%rcx)
22: 74 2c je 0x50
24: 8b 91 f8 15 00 00 mov 0x15f8(%rcx),%edx
* 2a: 83 fa 02 cmp $0x2,%edx <-- trapping instruction
2d: 75 21 jne 0x50
2f: 48 8b 91 00 16 00 00 mov 0x1600(%rcx),%rdx
36: 48 8b 32 mov (%rdx),%rsi
39: 48 8d 7e 01 lea 0x1(%rsi),%rdi
3d: 8b .byte 0x8b
3e: 89 fc mov %edi,%esp