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BUG: KASAN: double-free in kfree+0x104/0x228 mm/slab_common.c:1007
Free of addr ffff000123210000 by task syz-executor.0/4341

CPU: 1 PID: 4341 Comm: syz-executor.0 Not tainted 6.1.18-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:395
 kasan_report_invalid_free+0xc4/0x114 mm/kasan/report.c:460
 ____kasan_slab_free+0x170/0x1c0 mm/kasan/common.c:225
 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3674
 kfree+0x104/0x228 mm/slab_common.c:1007
 diUnmount+0xf4/0x10c fs/jfs/jfs_imap.c:195
 jfs_umount+0x110/0x338 fs/jfs/jfs_umount.c:63
 jfs_put_super+0x90/0x188 fs/jfs/super.c:194
 generic_shutdown_super+0x130/0x328 fs/super.c:492
 kill_block_super+0x70/0xdc fs/super.c:1441
 deactivate_locked_super+0xac/0x124 fs/super.c:332
 deactivate_super+0xf0/0x110 fs/super.c:363
 cleanup_mnt+0x394/0x41c fs/namespace.c:1186
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193
 task_work_run+0x240/0x2f0 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x2144/0x3470 arch/arm64/kernel/signal.c:1132
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581

Allocated by task 17490:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:955 [inline]
 __kmalloc_node_track_caller+0xd0/0x1c0 mm/slab_common.c:975
 kmalloc_reserve net/core/skbuff.c:437 [inline]
 __alloc_skb+0x174/0x580 net/core/skbuff.c:509
 alloc_skb include/linux/skbuff.h:1267 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline]
 nsim_dev_trap_report_work+0x1f0/0x924 drivers/net/netdevsim/dev.c:853
 process_one_work+0x868/0x16f4 kernel/workqueue.c:2289
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2436
 kthread+0x24c/0x2d4 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Freed by task 17490:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516
 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236
 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3674
 kfree+0x104/0x228 mm/slab_common.c:1007
 skb_free_head net/core/skbuff.c:760 [inline]
 skb_release_data+0x488/0x6b0 net/core/skbuff.c:789
 skb_release_all net/core/skbuff.c:854 [inline]
 __kfree_skb net/core/skbuff.c:868 [inline]
 consume_skb+0xa0/0x178 net/core/skbuff.c:1033
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:824 [inline]
 nsim_dev_trap_report_work+0x628/0x924 drivers/net/netdevsim/dev.c:853
 process_one_work+0x868/0x16f4 kernel/workqueue.c:2289
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2436
 kthread+0x24c/0x2d4 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

The buggy address belongs to the object at ffff000123210000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
 4096-byte region [ffff000123210000, ffff000123211000)

The buggy address belongs to the physical page:
page:00000000856ac334 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163210
head:00000000856ac334 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0002a80
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff00012320ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff00012320ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff000123210000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff000123210080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff000123210100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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