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BUG: KASAN: double-free in slab_free mm/slub.c:3539 [inline]
BUG: KASAN: double-free in kfree+0xe2/0x580 mm/slub.c:4567

CPU: 1 PID: 8972 Comm: kworker/1:6 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events mptcp_worker
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
 kasan_report_invalid_free+0x81/0x190 mm/kasan/report.c:462
 ____kasan_slab_free+0x18b/0x1c0 mm/kasan/common.c:356
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1759 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785
 slab_free mm/slub.c:3539 [inline]
 kfree+0xe2/0x580 mm/slub.c:4567
 tcp_disconnect+0x980/0x1e20 net/ipv4/tcp.c:3145
 __mptcp_close_ssk+0x5ca/0x7e0 net/mptcp/protocol.c:2327
 mptcp_do_fastclose net/mptcp/protocol.c:2592 [inline]
 mptcp_worker+0x78c/0xff0 net/mptcp/protocol.c:2627
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 3637:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 ____kasan_kmalloc mm/kasan/common.c:516 [inline]
 ____kasan_kmalloc mm/kasan/common.c:475 [inline]
 __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
 kmalloc include/linux/slab.h:605 [inline]
 kzalloc include/linux/slab.h:733 [inline]
 ext4_htree_store_dirent+0x89/0x5f0 fs/ext4/dir.c:474
 htree_dirblock_to_tree+0x734/0xcd0 fs/ext4/namei.c:1120
 ext4_htree_fill_tree+0x323/0xc30 fs/ext4/namei.c:1199
 ext4_dx_readdir fs/ext4/dir.c:597 [inline]
 ext4_readdir+0x1dfe/0x3870 fs/ext4/dir.c:142
 iterate_dir+0x56a/0x6f0 fs/readdir.c:65
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __x64_sys_getdents64+0x13a/0x2c0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 3637:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:367 [inline]
 ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1759 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785
 slab_free mm/slub.c:3539 [inline]
 kfree+0xe2/0x580 mm/slub.c:4567
 free_rb_tree_fname+0x7c/0xd0 fs/ext4/dir.c:426
 ext4_htree_free_dir_info fs/ext4/dir.c:448 [inline]
 ext4_release_dir+0x41/0x60 fs/ext4/dir.c:638
 __fput+0x277/0x9d0 fs/file_table.c:320
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
 exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88802347b680
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff88802347b680, ffff88802347b6c0)

The buggy address belongs to the physical page:
page:ffffea00008d1ec0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2347b
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0000824600 dead000000000004 ffff888011841640
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 10695258467, free_ts 0
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549
 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2103
 alloc_pages+0x22f/0x270 mm/mempolicy.c:2265
 alloc_slab_page mm/slub.c:1829 [inline]
 allocate_slab+0x27e/0x3d0 mm/slub.c:1974
 new_slab mm/slub.c:2034 [inline]
 ___slab_alloc+0x84f/0xe80 mm/slub.c:3036
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123
 slab_alloc_node mm/slub.c:3214 [inline]
 slab_alloc mm/slub.c:3256 [inline]
 __kmalloc+0x32b/0x340 mm/slub.c:4425
 kmalloc_array include/linux/slab.h:640 [inline]
 kobj_map+0x72/0x440 drivers/base/map.c:44
 cdev_add+0x9f/0x130 fs/char_dev.c:489
 __video_register_device+0x1c52/0x50b0 drivers/media/v4l2-core/v4l2-dev.c:1023
 __v4l2_device_register_subdev_nodes+0x334/0x680 drivers/media/v4l2-core/v4l2-device.c:222
 v4l2_device_register_subdev_nodes include/media/v4l2-device.h:203 [inline]
 vimc_register_devices drivers/media/test-drivers/vimc/vimc-core.c:316 [inline]
 vimc_probe+0xafb/0xfd0 drivers/media/test-drivers/vimc/vimc-core.c:374
 platform_probe+0xfc/0x1f0 drivers/base/platform.c:1400
 call_driver_probe drivers/base/dd.c:560 [inline]
 really_probe+0x249/0xb90 drivers/base/dd.c:639
 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802347b580: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff88802347b600: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
>ffff88802347b680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff88802347b700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88802347b780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
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