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BUG: KASAN: slab-use-after-free in __hlist_del include/linux/list.h:982 [inline]
BUG: KASAN: slab-use-after-free in hlist_del_init include/linux/list.h:1008 [inline]
BUG: KASAN: slab-use-after-free in binderfs_evict_inode+0x2ac/0x2b4 drivers/android/binderfs.c:277
Write of size 8 at addr ffff00001a851808 by task syz-executor/3308
CPU: 0 UID: 0 PID: 3308 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller-00142-g4856ebd99715 #0 PREEMPT
Hardware name: linux,dummy-virt (DT)
Call trace:
show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:466 (C)
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0xa4/0xf4 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xf4/0x60c mm/kasan/report.c:521
kasan_report+0xc8/0x108 mm/kasan/report.c:634
__asan_report_store8_noabort+0x20/0x2c mm/kasan/report_generic.c:386
__hlist_del include/linux/list.h:982 [inline]
hlist_del_init include/linux/list.h:1008 [inline]
binderfs_evict_inode+0x2ac/0x2b4 drivers/android/binderfs.c:277
evict+0x2c0/0x67c fs/inode.c:810
iput_final fs/inode.c:1898 [inline]
iput fs/inode.c:1924 [inline]
iput+0x3b0/0x6b4 fs/inode.c:1910
dentry_unlink_inode+0x208/0x46c fs/dcache.c:457
__dentry_kill+0x150/0x52c fs/dcache.c:660
shrink_kill fs/dcache.c:1105 [inline]
shrink_dentry_list+0x114/0x3a4 fs/dcache.c:1132
shrink_dcache_parent+0x158/0x354 fs/dcache.c:1566
do_one_tree fs/dcache.c:1595 [inline]
shrink_dcache_for_umount+0x88/0x304 fs/dcache.c:1612
generic_shutdown_super+0x60/0x2e8 fs/super.c:620
kill_anon_super fs/super.c:1237 [inline]
kill_litter_super+0x68/0xa4 fs/super.c:1247
binderfs_kill_super+0x38/0x88 drivers/android/binderfs.c:792
deactivate_locked_super+0x98/0x17c fs/super.c:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xb0/0xd4 fs/super.c:502
cleanup_mnt+0x198/0x424 fs/namespace.c:1431
__cleanup_mnt+0x14/0x20 fs/namespace.c:1438
task_work_run+0x128/0x210 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x7ac/0x1f68 kernel/exit.c:953
do_group_exit+0xa4/0x208 kernel/exit.c:1102
get_signal+0x1b00/0x1ba8 kernel/signal.c:3034
do_signal+0x160/0x620 arch/arm64/kernel/signal.c:1658
do_notify_resume+0x18c/0x258 arch/arm64/kernel/entry-common.c:148
exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
el0_svc_compat+0xfc/0x17c arch/arm64/kernel/entry-common.c:888
el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:897
el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:605
Allocated by task 3309:
kasan_save_stack+0x3c/0x64 mm/kasan/common.c:47
kasan_save_track+0x20/0x3c mm/kasan/common.c:68
kasan_save_alloc_info+0x40/0x54 mm/kasan/generic.c:562
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xb8/0xbc mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x1b0/0x3cc mm/slub.c:4358
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
binderfs_binder_device_create.isra.0+0x140/0x9a0 drivers/android/binderfs.c:147
binderfs_fill_super+0x69c/0xed4 drivers/android/binderfs.c:730
vfs_get_super fs/super.c:1280 [inline]
get_tree_nodev+0xac/0x148 fs/super.c:1299
binderfs_fs_context_get_tree+0x18/0x24 drivers/android/binderfs.c:750
vfs_get_tree+0x74/0x280 fs/super.c:1759
do_new_mount fs/namespace.c:3881 [inline]
path_mount+0xe54/0x1808 fs/namespace.c:4208
do_mount fs/namespace.c:4221 [inline]
__do_sys_mount fs/namespace.c:4432 [inline]
__se_sys_mount fs/namespace.c:4409 [inline]
__arm64_sys_mount+0x304/0x3dc fs/namespace.c:4409
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49
el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132
do_el0_svc_compat+0x40/0x68 arch/arm64/kernel/syscall.c:157
el0_svc_compat+0x4c/0x17c arch/arm64/kernel/entry-common.c:887
el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:897
el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:605
Freed by task 3309:
kasan_save_stack+0x3c/0x64 mm/kasan/common.c:47
kasan_save_track+0x20/0x3c mm/kasan/common.c:68
kasan_save_free_info+0x4c/0x74 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x50/0x6c mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x1bc/0x444 mm/slub.c:4841
binderfs_evict_inode+0x238/0x2b4 drivers/android/binderfs.c:279
evict+0x2c0/0x67c fs/inode.c:810
iput_final fs/inode.c:1898 [inline]
iput fs/inode.c:1924 [inline]
iput+0x3b0/0x6b4 fs/inode.c:1910
dentry_unlink_inode+0x208/0x46c fs/dcache.c:457
__dentry_kill+0x150/0x52c fs/dcache.c:660
shrink_kill fs/dcache.c:1105 [inline]
shrink_dentry_list+0x114/0x3a4 fs/dcache.c:1132
shrink_dcache_parent+0x158/0x354 fs/dcache.c:1566
do_one_tree fs/dcache.c:1595 [inline]
shrink_dcache_for_umount+0x88/0x304 fs/dcache.c:1612
generic_shutdown_super+0x60/0x2e8 fs/super.c:620
kill_anon_super fs/super.c:1237 [inline]
kill_litter_super+0x68/0xa4 fs/super.c:1247
binderfs_kill_super+0x38/0x88 drivers/android/binderfs.c:792
deactivate_locked_super+0x98/0x17c fs/super.c:473
deactivate_super fs/super.c:506 [inline]
deactivate_super+0xb0/0xd4 fs/super.c:502
cleanup_mnt+0x198/0x424 fs/namespace.c:1431
__cleanup_mnt+0x14/0x20 fs/namespace.c:1438
task_work_run+0x128/0x210 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x7ac/0x1f68 kernel/exit.c:953
do_group_exit+0xa4/0x208 kernel/exit.c:1102
get_signal+0x1b00/0x1ba8 kernel/signal.c:3034
do_signal+0x160/0x620 arch/arm64/kernel/signal.c:1658
do_notify_resume+0x18c/0x258 arch/arm64/kernel/entry-common.c:148
exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
el0_svc_compat+0xfc/0x17c arch/arm64/kernel/entry-common.c:888
el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:897
el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:605
The buggy address belongs to the object at ffff00001a851800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes inside of
freed 512-byte region [ffff00001a851800, ffff00001a851a00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff00001a850c00 pfn:0x5a850
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x1ffc00000000040(head|node=0|zone=0|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 01ffc00000000040 ffff00000dc01c80 0000000000000000 dead000000000001
raw: ffff00001a850c00 0000000000100004 00000000f5000000 0000000000000000
head: 01ffc00000000040 ffff00000dc01c80 0000000000000000 dead000000000001
head: ffff00001a850c00 0000000000100004 00000000f5000000 0000000000000000
head: 01ffc00000000002 fffffdffc06a1401 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff00001a851700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff00001a851780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff00001a851800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff00001a851880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff00001a851900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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