==================================================================
BUG: KASAN: slab-use-after-free in fuse_copy_one fs/fuse/dev.c:1007 [inline]
BUG: KASAN: slab-use-after-free in fuse_copy_args+0x248/0x630 fs/fuse/dev.c:1025
Read of size 256 at addr ffff8881166d6810 by task syz-executor.1/7382

CPU: 1 PID: 7382 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-12728-g348551ddaf31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x155/0x1c0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:351 [inline]
 print_report+0x15d/0x540 mm/kasan/report.c:462
 kasan_report+0x16d/0x1a0 mm/kasan/report.c:572
 kasan_check_range+0x298/0x2a0 mm/kasan/generic.c:187
 __asan_memcpy+0x31/0x70 mm/kasan/shadow.c:105
 fuse_copy_one fs/fuse/dev.c:1007 [inline]
 fuse_copy_args+0x248/0x630 fs/fuse/dev.c:1025
 fuse_dev_do_read+0xc03/0x1130 fs/fuse/dev.c:1300
 fuse_dev_read+0x171/0x210 fs/fuse/dev.c:1367
 call_read_iter include/linux/fs.h:1862 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x775/0xae0 fs/read_write.c:470
 ksys_read+0x19d/0x2c0 fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __x64_sys_read+0x7f/0x90 fs/read_write.c:621
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb17248b639
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb171fff168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fb1725ac1f0 RCX: 00007fb17248b639
RDX: 0000000000002020 RSI: 0000000020002140 RDI: 0000000000000003
RBP: 00007fb1724e6ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffec2f4fd2f R14: 00007fb171fff300 R15: 0000000000022000
 </TASK>

Allocated by task 7367:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x23/0x30 mm/kasan/generic.c:510
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x9d/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:966 [inline]
 __kmalloc+0xb8/0x1e0 mm/slab_common.c:979
 kmalloc include/linux/slab.h:563 [inline]
 __d_alloc+0xb4/0x6c0 fs/dcache.c:1786
 d_alloc fs/dcache.c:1849 [inline]
 d_alloc_parallel+0xe5/0x1280 fs/dcache.c:2638
 __lookup_slow+0x158/0x3e0 fs/namei.c:1675
 lookup_slow+0x5a/0x80 fs/namei.c:1707
 walk_component+0x2e7/0x410 fs/namei.c:1998
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x16d/0x450 fs/namei.c:2479
 filename_lookup+0x255/0x610 fs/namei.c:2508
 user_path_at_empty+0x47/0x1b0 fs/namei.c:2907
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3379 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x289/0x3b0 fs/namespace.c:3568
 __x64_sys_mount+0xc3/0xe0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 296:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2f/0x50 mm/kasan/generic.c:521
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:236
 __kasan_slab_free+0x15/0x20 mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook mm/slub.c:1807 [inline]
 slab_free mm/slub.c:3786 [inline]
 kmem_cache_free_bulk+0x63e/0x7b0 mm/slub.c:3904
 kfree_bulk include/linux/slab.h:476 [inline]
 kvfree_rcu_bulk+0xd0/0x340 kernel/rcu/tree.c:2931
 kvfree_rcu_drain_ready kernel/rcu/tree.c:3101 [inline]
 kfree_rcu_monitor+0x13b6/0x1510 kernel/rcu/tree.c:3119
 process_one_work+0x6ab/0xc00 kernel/workqueue.c:2405
 worker_thread+0xac7/0x12b0 kernel/workqueue.c:2552
 kthread+0x2ba/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Last potentially related work creation:
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:491
 kasan_record_aux_stack_noalloc+0xf/0x20 mm/kasan/generic.c:501
 kvfree_call_rcu+0x99/0x810 kernel/rcu/tree.c:3332
 copy_name fs/dcache.c:2925 [inline]
 __d_move+0x874/0x13a0 fs/dcache.c:2989
 __d_unalias+0x1cc/0x220 fs/dcache.c:3103
 d_splice_alias+0x20e/0x390 fs/dcache.c:3166
 fuse_lookup+0x2bd/0x5f0 fs/fuse/dir.c:447
 __lookup_slow+0x2bd/0x3e0 fs/namei.c:1690
 lookup_slow+0x5a/0x80 fs/namei.c:1707
 walk_component fs/namei.c:1998 [inline]
 link_path_walk+0x9c5/0xe70 fs/namei.c:2325
 path_parentat fs/namei.c:2526 [inline]
 __filename_parentat+0x262/0x6f0 fs/namei.c:2550
 filename_parentat fs/namei.c:2568 [inline]
 filename_create+0xf6/0x530 fs/namei.c:3865
 do_mkdirat+0xc1/0x450 fs/namei.c:4130
 __do_sys_mkdir fs/namei.c:4158 [inline]
 __se_sys_mkdir fs/namei.c:4156 [inline]
 __x64_sys_mkdir+0x72/0x80 fs/namei.c:4156
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:491
 kasan_record_aux_stack_noalloc+0xf/0x20 mm/kasan/generic.c:501
 kvfree_call_rcu+0x99/0x810 kernel/rcu/tree.c:3332
 copy_name fs/dcache.c:2925 [inline]
 __d_move+0x874/0x13a0 fs/dcache.c:2989
 __d_unalias+0x1cc/0x220 fs/dcache.c:3103
 d_splice_alias+0x20e/0x390 fs/dcache.c:3166
 fuse_lookup+0x2bd/0x5f0 fs/fuse/dir.c:447
 __lookup_slow+0x2bd/0x3e0 fs/namei.c:1690
 lookup_slow+0x5a/0x80 fs/namei.c:1707
 walk_component fs/namei.c:1998 [inline]
 link_path_walk+0x9c5/0xe70 fs/namei.c:2325
 path_parentat fs/namei.c:2526 [inline]
 __filename_parentat+0x262/0x6f0 fs/namei.c:2550
 filename_parentat fs/namei.c:2568 [inline]
 filename_create+0xf6/0x530 fs/namei.c:3865
 do_mkdirat+0xc1/0x450 fs/namei.c:4130
 __do_sys_mkdir fs/namei.c:4158 [inline]
 __se_sys_mkdir fs/namei.c:4156 [inline]
 __x64_sys_mkdir+0x72/0x80 fs/namei.c:4156
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff8881166d6800
 which belongs to the cache kmalloc-rcl-512 of size 512
The buggy address is located 16 bytes inside of
 freed 512-byte region [ffff8881166d6800, ffff8881166d6a00)

The buggy address belongs to the physical page:
page:ffffea000459b500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1166d4
head:ffffea000459b500 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
page_type: 0xffffffff()
raw: 4000000000010200 ffff888100042dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 1219, tgid 1218 (syz-executor.1), ts 65193011194, free_ts 65090527414
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x223/0x230 mm/page_alloc.c:1722
 prep_new_page mm/page_alloc.c:1729 [inline]
 get_page_from_freelist+0x3442/0x3510 mm/page_alloc.c:3493
 __alloc_pages+0x3e7/0x890 mm/page_alloc.c:4759
 allocate_slab mm/slub.c:1998 [inline]
 new_slab+0xce/0x4d0 mm/slub.c:2051
 ___slab_alloc+0x701/0xb90 mm/slub.c:3192
 __slab_alloc mm/slub.c:3291 [inline]
 __slab_alloc_node mm/slub.c:3344 [inline]
 slab_alloc_node mm/slub.c:3441 [inline]
 __kmem_cache_alloc_node+0x188/0x240 mm/slub.c:3490
 __do_kmalloc_node mm/slab_common.c:965 [inline]
 __kmalloc+0xa7/0x1e0 mm/slab_common.c:979
 kmalloc include/linux/slab.h:563 [inline]
 __d_alloc+0xb4/0x6c0 fs/dcache.c:1786
 d_alloc fs/dcache.c:1849 [inline]
 d_alloc_parallel+0xe5/0x1280 fs/dcache.c:2638
 __lookup_slow+0x158/0x3e0 fs/namei.c:1675
 lookup_slow+0x5a/0x80 fs/namei.c:1707
 walk_component+0x2e7/0x410 fs/namei.c:1998
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x16d/0x450 fs/namei.c:2479
 filename_lookup+0x255/0x610 fs/namei.c:2508
 vfs_statx+0x110/0x480 fs/stat.c:238
 vfs_fstatat fs/stat.c:276 [inline]
 __do_sys_newfstatat fs/stat.c:446 [inline]
 __se_sys_newfstatat+0x102/0x7a0 fs/stat.c:440
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1302 [inline]
 free_unref_page_prepare+0x462/0x6a0 mm/page_alloc.c:2555
 free_unref_page+0x3a/0x390 mm/page_alloc.c:2650
 free_the_page mm/page_alloc.c:661 [inline]
 __free_pages+0x65/0x100 mm/page_alloc.c:4848
 __free_slab+0xc6/0x100 mm/slub.c:2068
 free_slab+0x24/0xd0 mm/slub.c:2091
 discard_slab mm/slub.c:2097 [inline]
 __unfreeze_partials+0x15f/0x180 mm/slub.c:2636
 put_cpu_partial+0xa9/0x100 mm/slub.c:2712
 __slab_free+0x1cc/0x280 mm/slub.c:3652
 do_slab_free mm/slub.c:3730 [inline]
 ___cache_free+0xca/0xe0 mm/slub.c:3793
 qlink_free+0x4f/0x90 mm/kasan/quarantine.c:166
 qlist_free_all+0x52/0xc0 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x150/0x180 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x28/0x80 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook+0x66/0x310 mm/slab.h:711
 slab_alloc_node mm/slub.c:3451 [inline]
 slab_alloc mm/slub.c:3459 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3466 [inline]
 kmem_cache_alloc+0x125/0x2c0 mm/slub.c:3475
 mt_alloc_one lib/maple_tree.c:159 [inline]
 mas_alloc_nodes+0x267/0x7d0 lib/maple_tree.c:1287

Memory state around the buggy address:
 ffff8881166d6700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881166d6780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881166d6800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8881166d6880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881166d6900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================