KASAN: slab-use-after-free Write in binder_add_device

==================================================================
BUG: KASAN: slab-use-after-free in hlist_add_head include/linux/list.h:1026 [inline]
BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0 drivers/android/binder.c:6932
Write of size 8 at addr ffff88807ef10008 by task syz-executor/5852

CPU: 0 UID: 0 PID: 5852 Comm: syz-executor Not tainted 6.13.0-next-20250131-syzkaller-10663-gdf4b2bbff898-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __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:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 hlist_add_head include/linux/list.h:1026 [inline]
 binder_add_device+0x5f/0xa0 drivers/android/binder.c:6932
 binderfs_binder_device_create+0x7bf/0x9c0 drivers/android/binderfs.c:210
 binderfs_fill_super+0x944/0xd90 drivers/android/binderfs.c:729
 vfs_get_super fs/super.c:1280 [inline]
 get_tree_nodev+0xb7/0x140 fs/super.c:1299
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 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
RIP: 0033:0x7f0c2bf874ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0c2c29ff68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0c2c001ecb RCX: 00007f0c2bf874ca
RDX: 00007f0c2c00ec27 RSI: 00007f0c2c001ecb RDI: 00007f0c2c00ec27
RBP: 00007f0c2c0020c3 R08: 0000000000000000 R09: 0000000000000100
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c2bfe41c8
R13: 00007f0c2bfe41a8 R14: 0000000000000009 R15: 0000000000000000
 </TASK>

Allocated by task 5846:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4325
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 binderfs_binder_device_create+0x16c/0x9c0 drivers/android/binderfs.c:147
 binderfs_fill_super+0x944/0xd90 drivers/android/binderfs.c:729
 vfs_get_super fs/super.c:1280 [inline]
 get_tree_nodev+0xb7/0x140 fs/super.c:1299
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 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 5846:
 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:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2353 [inline]
 slab_free mm/slub.c:4609 [inline]
 kfree+0x196/0x430 mm/slub.c:4757
 evict+0x4e8/0x9a0 fs/inode.c:796
 __dentry_kill+0x20d/0x630 fs/dcache.c:643
 shrink_kill+0xa9/0x2c0 fs/dcache.c:1088
 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1115
 shrink_dcache_parent+0xcb/0x3b0
 do_one_tree+0x23/0xe0 fs/dcache.c:1578
 shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1595
 generic_shutdown_super+0x6a/0x2d0 fs/super.c:620
 kill_anon_super fs/super.c:1237 [inline]
 kill_litter_super+0x76/0xb0 fs/super.c:1247
 binderfs_kill_super+0x44/0x90 drivers/android/binderfs.c:791
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413
 task_work_run+0x24f/0x310 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2a/0x28e0 kernel/exit.c:938
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 get_signal+0x16b2/0x1750 kernel/signal.c:3036
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 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 ffff88807ef10000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
 freed 512-byte region [ffff88807ef10000, ffff88807ef10200)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ef10
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801ac41c80 ffffea0000c52800 dead000000000002
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801ac41c80 ffffea0000c52800 dead000000000002
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001fbc401 ffffffffffffffff 0000000000000000
head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5210, tgid 5210 (udevadm), ts 32878261994, free_ts 27644575166
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:2423 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2587
 new_slab mm/slub.c:2640 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826
 __slab_alloc+0x58/0xa0 mm/slub.c:3916
 __slab_alloc_node mm/slub.c:3991 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 __kmalloc_cache_noprof+0x27b/0x390 mm/slub.c:4320
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 kernfs_fop_open+0x3e0/0xd10 fs/kernfs/file.c:623
 do_dentry_open+0xdec/0x1960 fs/open.c:955
 vfs_open+0x3b/0x370 fs/open.c:1085
 do_open fs/namei.c:3830 [inline]
 path_openat+0x2c81/0x3590 fs/namei.c:3989
 do_filp_open+0x27f/0x4e0 fs/namei.c:4016
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1427
 do_sys_open fs/open.c:1442 [inline]
 __do_sys_openat fs/open.c:1458 [inline]
 __se_sys_openat fs/open.c:1453 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1453
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
page last free pid 1 tgid 1 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
 free_contig_range+0x14c/0x430 mm/page_alloc.c:6678
 destroy_args+0x94/0x4b0 mm/debug_vm_pgtable.c:1017
 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1397
 do_one_initcall+0x248/0x870 init/main.c:1257
 do_initcall_level+0x157/0x210 init/main.c:1319
 do_initcalls+0x3f/0x80 init/main.c:1335
 kernel_init_freeable+0x435/0x5d0 init/main.c:1568
 kernel_init+0x1d/0x2b0 init/main.c:1457
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff88807ef0ff00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88807ef0ff80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88807ef10000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88807ef10080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88807ef10100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================


Warning: Permanently added '10.128.10.51' (ED25519) to the list of known hosts.
2025/01/31 10:00:58 ignoring optional flag "sandboxArg"="0"
2025/01/31 10:00:58 parsed 1 programs
[   86.221208][ T5837] cgroup: Unknown subsys name 'net'
[   86.373965][ T5837] cgroup: Unknown subsys name 'cpuset'
[   86.383412][ T5837] cgroup: Unknown subsys name 'rlimit'
[   88.179764][ T5837] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   91.217619][ T5846] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
[   91.469914][ T5852] ==================================================================
[   91.478014][ T5852] BUG: KASAN: slab-use-after-free in binder_add_device+0x5f/0xa0
[   91.485755][ T5852] Write of size 8 at addr ffff88807ef10008 by task syz-executor/5852
[   91.493807][ T5852] 
[   91.496139][ T5852] CPU: 0 UID: 0 PID: 5852 Comm: syz-executor Not tainted 6.13.0-next-20250131-syzkaller-10663-gdf4b2bbff898-dirty #0
[   91.496154][ T5852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   91.496168][ T5852] Call Trace:
[   91.496174][ T5852]  <TASK>
[   91.496180][ T5852]  dump_stack_lvl+0x241/0x360
[   91.496197][ T5852]  ? __pfx_dump_stack_lvl+0x10/0x10
[   91.496210][ T5852]  ? __pfx__printk+0x10/0x10
[   91.496223][ T5852]  ? _printk+0xd5/0x120
[   91.496234][ T5852]  ? __virt_addr_valid+0x183/0x530
[   91.496254][ T5852]  ? __virt_addr_valid+0x183/0x530
[   91.496272][ T5852]  print_report+0x169/0x550
[   91.496292][ T5852]  ? __virt_addr_valid+0x183/0x530
[   91.496308][ T5852]  ? __virt_addr_valid+0x183/0x530
[   91.496324][ T5852]  ? __virt_addr_valid+0x45f/0x530
[   91.496341][ T5852]  ? __phys_addr+0xba/0x170
[   91.496358][ T5852]  ? binder_add_device+0x5f/0xa0
[   91.496370][ T5852]  kasan_report+0x143/0x180
[   91.496382][ T5852]  ? binder_add_device+0x5f/0xa0
[   91.496397][ T5852]  binder_add_device+0x5f/0xa0
[   91.496409][ T5852]  binderfs_binder_device_create+0x7bf/0x9c0
[   91.496431][ T5852]  binderfs_fill_super+0x944/0xd90
[   91.496452][ T5852]  ? __pfx_binderfs_fill_super+0x10/0x10
[   91.496479][ T5852]  ? shrinker_register+0x160/0x230
[   91.496496][ T5852]  ? sget_fc+0x909/0x9c0
[   91.496512][ T5852]  ? __pfx_set_anon_super_fc+0x10/0x10
[   91.496528][ T5852]  ? __pfx_binderfs_fill_super+0x10/0x10
[   91.496545][ T5852]  get_tree_nodev+0xb7/0x140
[   91.496562][ T5852]  vfs_get_tree+0x90/0x2b0
[   91.496580][ T5852]  do_new_mount+0x2be/0xb40
[   91.496595][ T5852]  ? __pfx_do_new_mount+0x10/0x10
[   91.496611][ T5852]  __se_sys_mount+0x2d6/0x3c0
[   91.496624][ T5852]  ? lockdep_hardirqs_on_prepare+0x43d/0x780
[   91.496642][ T5852]  ? __pfx___se_sys_mount+0x10/0x10
[   91.496656][ T5852]  ? do_syscall_64+0x100/0x230
[   91.496672][ T5852]  ? __x64_sys_mount+0x20/0xc0
[   91.496685][ T5852]  do_syscall_64+0xf3/0x230
[   91.496699][ T5852]  ? clear_bhb_loop+0x35/0x90
[   91.496722][ T5852]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.496739][ T5852] RIP: 0033:0x7f0c2bf874ca
[   91.496754][ T5852] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
[   91.496764][ T5852] RSP: 002b:00007f0c2c29ff68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   91.496778][ T5852] RAX: ffffffffffffffda RBX: 00007f0c2c001ecb RCX: 00007f0c2bf874ca
[   91.496787][ T5852] RDX: 00007f0c2c00ec27 RSI: 00007f0c2c001ecb RDI: 00007f0c2c00ec27
[   91.496796][ T5852] RBP: 00007f0c2c0020c3 R08: 0000000000000000 R09: 0000000000000100
[   91.496804][ T5852] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c2bfe41c8
[   91.496811][ T5852] R13: 00007f0c2bfe41a8 R14: 0000000000000009 R15: 0000000000000000
[   91.496825][ T5852]  </TASK>
[   91.496829][ T5852] 
[   91.771786][ T5852] Allocated by task 5846:
[   91.776116][ T5852]  kasan_save_track+0x3f/0x80
[   91.780792][ T5852]  __kasan_kmalloc+0x98/0xb0
[   91.785374][ T5852]  __kmalloc_cache_noprof+0x243/0x390
[   91.790927][ T5852]  binderfs_binder_device_create+0x16c/0x9c0
[   91.796918][ T5852]  binderfs_fill_super+0x944/0xd90
[   91.802034][ T5852]  get_tree_nodev+0xb7/0x140
[   91.806618][ T5852]  vfs_get_tree+0x90/0x2b0
[   91.811119][ T5852]  do_new_mount+0x2be/0xb40
[   91.815698][ T5852]  __se_sys_mount+0x2d6/0x3c0
[   91.820366][ T5852]  do_syscall_64+0xf3/0x230
[   91.824857][ T5852]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.830748][ T5852] 
[   91.833060][ T5852] Freed by task 5846:
[   91.837022][ T5852]  kasan_save_track+0x3f/0x80
[   91.841692][ T5852]  kasan_save_free_info+0x40/0x50
[   91.846940][ T5852]  __kasan_slab_free+0x59/0x70
[   91.851782][ T5852]  kfree+0x196/0x430
[   91.855690][ T5852]  evict+0x4e8/0x9a0
[   91.859757][ T5852]  __dentry_kill+0x20d/0x630
[   91.864420][ T5852]  shrink_kill+0xa9/0x2c0
[   91.868739][ T5852]  shrink_dentry_list+0x2c0/0x5b0
[   91.873750][ T5852]  shrink_dcache_parent+0xcb/0x3b0
[   91.878856][ T5852]  do_one_tree+0x23/0xe0
[   91.883112][ T5852]  shrink_dcache_for_umount+0xb4/0x180
[   91.888759][ T5852]  generic_shutdown_super+0x6a/0x2d0
[   91.894031][ T5852]  kill_litter_super+0x76/0xb0
[   91.898786][ T5852]  binderfs_kill_super+0x44/0x90
[   91.903715][ T5852]  deactivate_locked_super+0xc4/0x130
[   91.909083][ T5852]  cleanup_mnt+0x41f/0x4b0
[   91.913496][ T5852]  task_work_run+0x24f/0x310
[   91.918167][ T5852]  do_exit+0xa2a/0x28e0
[   91.922486][ T5852]  do_group_exit+0x207/0x2c0
[   91.927074][ T5852]  get_signal+0x16b2/0x1750
[   91.931573][ T5852]  arch_do_signal_or_restart+0x96/0x860
[   91.937109][ T5852]  syscall_exit_to_user_mode+0xce/0x340
[   91.942648][ T5852]  do_syscall_64+0x100/0x230
[   91.947233][ T5852]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.953115][ T5852] 
[   91.955427][ T5852] The buggy address belongs to the object at ffff88807ef10000
[   91.955427][ T5852]  which belongs to the cache kmalloc-512 of size 512
[   91.969470][ T5852] The buggy address is located 8 bytes inside of
[   91.969470][ T5852]  freed 512-byte region [ffff88807ef10000, ffff88807ef10200)
[   91.983167][ T5852] 
[   91.985483][ T5852] The buggy address belongs to the physical page:
[   91.991894][ T5852] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ef10
[   92.000822][ T5852] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   92.009391][ T5852] flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
[   92.017207][ T5852] page_type: f5(slab)
[   92.021180][ T5852] raw: 00fff00000000040 ffff88801ac41c80 ffffea0000c52800 dead000000000002
[   92.029757][ T5852] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[   92.038416][ T5852] head: 00fff00000000040 ffff88801ac41c80 ffffea0000c52800 dead000000000002
[   92.047258][ T5852] head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
[   92.055915][ T5852] head: 00fff00000000002 ffffea0001fbc401 ffffffffffffffff 0000000000000000
[   92.064663][ T5852] head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
[   92.073405][ T5852] page dumped because: kasan: bad access detected
[   92.079907][ T5852] page_owner tracks the page as allocated
[   92.085727][ T5852] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5210, tgid 5210 (udevadm), ts 32878261994, free_ts 27644575166
[   92.106747][ T5852]  post_alloc_hook+0x1f4/0x240
[   92.111698][ T5852]  get_page_from_freelist+0x365c/0x37a0
[   92.117443][ T5852]  __alloc_frozen_pages_noprof+0x292/0x710
[   92.123260][ T5852]  alloc_pages_mpol+0x311/0x660
[   92.128188][ T5852]  allocate_slab+0x8f/0x3a0
[   92.132784][ T5852]  ___slab_alloc+0xc27/0x14a0
[   92.137528][ T5852]  __slab_alloc+0x58/0xa0
[   92.141854][ T5852]  __kmalloc_cache_noprof+0x27b/0x390
[   92.147318][ T5852]  kernfs_fop_open+0x3e0/0xd10
[   92.152078][ T5852]  do_dentry_open+0xdec/0x1960
[   92.156844][ T5852]  vfs_open+0x3b/0x370
[   92.160993][ T5852]  path_openat+0x2c81/0x3590
[   92.165660][ T5852]  do_filp_open+0x27f/0x4e0
[   92.170173][ T5852]  do_sys_openat2+0x13e/0x1d0
[   92.174842][ T5852]  __x64_sys_openat+0x247/0x2a0
[   92.179679][ T5852]  do_syscall_64+0xf3/0x230
[   92.184200][ T5852] page last free pid 1 tgid 1 stack trace:
[   92.190034][ T5852]  free_frozen_pages+0xe0d/0x10e0
[   92.195054][ T5852]  free_contig_range+0x14c/0x430
[   92.199978][ T5852]  destroy_args+0x94/0x4b0
[   92.204560][ T5852]  debug_vm_pgtable+0x4be/0x550
[   92.209397][ T5852]  do_one_initcall+0x248/0x870
[   92.214252][ T5852]  do_initcall_level+0x157/0x210
[   92.219182][ T5852]  do_initcalls+0x3f/0x80
[   92.223507][ T5852]  kernel_init_freeable+0x435/0x5d0
[   92.228692][ T5852]  kernel_init+0x1d/0x2b0
[   92.233019][ T5852]  ret_from_fork+0x4b/0x80
[   92.237432][ T5852]  ret_from_fork_asm+0x1a/0x30
[   92.242273][ T5852] 
[   92.244593][ T5852] Memory state around the buggy address:
[   92.250304][ T5852]  ffff88807ef0ff00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[   92.258606][ T5852]  ffff88807ef0ff80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[   92.266653][ T5852] >ffff88807ef10000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   92.274695][ T5852]                       ^
[   92.279006][ T5852]  ffff88807ef10080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   92.287047][ T5852]  ffff88807ef10100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   92.295095][ T5852] ==================================================================
[   92.304018][ T5852] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[   92.311237][ T5852] CPU: 1 UID: 0 PID: 5852 Comm: syz-executor Not tainted 6.13.0-next-20250131-syzkaller-10663-gdf4b2bbff898-dirty #0
[   92.323507][ T5852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[   92.333650][ T5852] Call Trace:
[   92.336941][ T5852]  <TASK>
[   92.339926][ T5852]  dump_stack_lvl+0x241/0x360
[   92.344596][ T5852]  ? __pfx_dump_stack_lvl+0x10/0x10
[   92.349786][ T5852]  ? __pfx__printk+0x10/0x10
[   92.354364][ T5852]  ? preempt_schedule+0xe1/0xf0
[   92.359198][ T5852]  ? vscnprintf+0x5d/0x90
[   92.363524][ T5852]  panic+0x349/0x880
[   92.367491][ T5852]  ? check_panic_on_warn+0x21/0xb0
[   92.372591][ T5852]  ? __pfx_panic+0x10/0x10
[   92.377010][ T5852]  ? _raw_spin_unlock_irqrestore+0x130/0x140
[   92.383064][ T5852]  ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[   92.389394][ T5852]  ? print_report+0x502/0x550
[   92.394081][ T5852]  check_panic_on_warn+0x86/0xb0
[   92.399003][ T5852]  ? binder_add_device+0x5f/0xa0
[   92.404125][ T5852]  end_report+0x77/0x160
[   92.408356][ T5852]  kasan_report+0x154/0x180
[   92.412846][ T5852]  ? binder_add_device+0x5f/0xa0
[   92.417776][ T5852]  binder_add_device+0x5f/0xa0
[   92.422545][ T5852]  binderfs_binder_device_create+0x7bf/0x9c0
[   92.428524][ T5852]  binderfs_fill_super+0x944/0xd90
[   92.433628][ T5852]  ? __pfx_binderfs_fill_super+0x10/0x10
[   92.439254][ T5852]  ? shrinker_register+0x160/0x230
[   92.444353][ T5852]  ? sget_fc+0x909/0x9c0
[   92.448581][ T5852]  ? __pfx_set_anon_super_fc+0x10/0x10
[   92.454118][ T5852]  ? __pfx_binderfs_fill_super+0x10/0x10
[   92.459753][ T5852]  get_tree_nodev+0xb7/0x140
[   92.464588][ T5852]  vfs_get_tree+0x90/0x2b0
[   92.468995][ T5852]  do_new_mount+0x2be/0xb40
[   92.473484][ T5852]  ? __pfx_do_new_mount+0x10/0x10
[   92.478509][ T5852]  __se_sys_mount+0x2d6/0x3c0
[   92.483342][ T5852]  ? lockdep_hardirqs_on_prepare+0x43d/0x780
[   92.489414][ T5852]  ? __pfx___se_sys_mount+0x10/0x10
[   92.494639][ T5852]  ? do_syscall_64+0x100/0x230
[   92.499406][ T5852]  ? __x64_sys_mount+0x20/0xc0
[   92.504347][ T5852]  do_syscall_64+0xf3/0x230
[   92.508928][ T5852]  ? clear_bhb_loop+0x35/0x90
[   92.513621][ T5852]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   92.519591][ T5852] RIP: 0033:0x7f0c2bf874ca
[   92.524060][ T5852] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
[   92.543747][ T5852] RSP: 002b:00007f0c2c29ff68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   92.552237][ T5852] RAX: ffffffffffffffda RBX: 00007f0c2c001ecb RCX: 00007f0c2bf874ca
[   92.560214][ T5852] RDX: 00007f0c2c00ec27 RSI: 00007f0c2c001ecb RDI: 00007f0c2c00ec27
[   92.568283][ T5852] RBP: 00007f0c2c0020c3 R08: 0000000000000000 R09: 0000000000000100
[   92.576305][ T5852] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c2bfe41c8
[   92.584292][ T5852] R13: 00007f0c2bfe41a8 R14: 0000000000000009 R15: 0000000000000000
[   92.592266][ T5852]  </TASK>
[   92.595466][ T5852] Kernel Offset: disabled
[   92.599782][ T5852] Rebooting in 86400 seconds..


syzkaller build log:
go env (err=<nil>)
GO111MODULE='auto'
GOARCH='amd64'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.7'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build3873886828=/tmp/go-build -gno-record-gcc-switches'

git status (err=<nil>)
HEAD detached at f3558dbf03
nothing to commit, working tree clean


tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
go fmt ./sys/... >/dev/null
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=f3558dbf032eab2b77c1cb11b9ce2baffe7838d3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20250103-110009'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
	-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"f3558dbf032eab2b77c1cb11b9ce2baffe7838d3\"
/usr/bin/ld: /tmp/ccu8SgTs.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking