------------[ cut here ]------------ WARNING: CPU: 0 PID: 6000 at mm/slab_common.c:935 free_large_kmalloc+0x34/0x138 mm/slab_common.c:936 Modules linked in: CPU: 0 PID: 6000 Comm: syz-executor.3 Not tainted 6.3.0-rc4-syzkaller-g59caa87f9dfb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : free_large_kmalloc+0x34/0x138 mm/slab_common.c:936 lr : kfree+0x104/0x1a8 mm/slab_common.c:1013 sp : ffff80001e337700 x29: ffff80001e337700 x28: ffff000132f4d770 x27: ffff000132f48430 x26: ffff0000c6cedc28 x25: ffff0000c6cedc20 x24: 0000000000000000 x23: ffff0001ffe70430 x22: dfff800000000000 x21: ffff8000088114d0 x20: ffff0000faa48000 x19: fffffc0003ea9200 x18: 1fffe0003685afb6 x17: ffff800015b5d000 x16: ffff8000122e7a54 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000406 x12: ffff0000d1b2b680 x11: ff8080000809a054 x10: 0000000000000000 x9 : 05ffc00000000000 x8 : ffff80001855b000 x7 : ffff800008777a74 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff0000faa48000 x0 : fffffc0003ea9200 Call trace: free_large_kmalloc+0x34/0x138 mm/slab_common.c:936 kfree+0x104/0x1a8 mm/slab_common.c:1013 diUnmount+0xf4/0x10c fs/jfs/jfs_imap.c:195 jfs_umount+0x15c/0x360 fs/jfs/jfs_umount.c:63 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x328 fs/super.c:500 kill_block_super+0x70/0xdc fs/super.c:1407 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1302 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+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 14568366 hardirqs last enabled at (14568365): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (14568365): [] _raw_spin_unlock_irqrestore+0x44/0xa4 kernel/locking/spinlock.c:194 hardirqs last disabled at (14568366): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (14568142): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (14568140): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- object pointer: 0x0000000071ccd37b ================================================================== BUG: KASAN: double-free in kfree+0x104/0x1a8 mm/slab_common.c:1013 Free of addr ffff0000faa48000 by task syz-executor.3/6000 CPU: 1 PID: 6000 Comm: syz-executor.3 Tainted: G W 6.3.0-rc4-syzkaller-g59caa87f9dfb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x1b8/0x1e4 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+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x174/0x514 mm/kasan/report.c:430 kasan_report_invalid_free+0xc4/0x114 mm/kasan/report.c:501 __kasan_kfree_large+0xa4/0xc0 mm/kasan/common.c:272 kasan_kfree_large include/linux/kasan.h:170 [inline] free_large_kmalloc+0x70/0x138 mm/slab_common.c:939 kfree+0x104/0x1a8 mm/slab_common.c:1013 diUnmount+0xf4/0x10c fs/jfs/jfs_imap.c:195 jfs_umount+0x15c/0x360 fs/jfs/jfs_umount.c:63 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x328 fs/super.c:500 kill_block_super+0x70/0xdc fs/super.c:1407 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1302 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+0x190/0x194 arch/arm64/kernel/entry.S:591 Allocated by task 19085: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:510 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node_track_caller+0xd0/0x1c0 mm/slab_common.c:987 kmalloc_reserve+0x138/0x258 net/core/skbuff.c:537 __alloc_skb+0x1c8/0x3d8 net/core/skbuff.c:606 alloc_skb include/linux/skbuff.h:1277 [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+0x788/0x12d4 kernel/workqueue.c:2390 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2537 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Freed by task 19085: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:521 ____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:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x2c0/0x4b4 mm/slub.c:3800 kfree+0xc4/0x1a8 mm/slab_common.c:1019 skb_kfree_head net/core/skbuff.c:858 [inline] skb_free_head+0xcc/0x190 net/core/skbuff.c:870 skb_release_data+0x428/0x5ac net/core/skbuff.c:899 skb_release_all net/core/skbuff.c:964 [inline] __kfree_skb net/core/skbuff.c:978 [inline] consume_skb+0x160/0x424 net/core/skbuff.c:1191 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+0x788/0x12d4 kernel/workqueue.c:2390 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2537 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000faa48000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes inside of 4096-byte region [ffff0000faa48000, ffff0000faa49000) The buggy address belongs to the physical page: page:0000000055d7c466 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13aa48 head:0000000055d7c466 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 ffff0000c0002a80 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000faa47f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000faa47f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000faa48000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000faa48080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000faa48100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== page:0000000055d7c466 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13aa48 head:0000000055d7c466 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 ffff0000c0002a80 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: VM_BUG_ON_FOLIO(folio_test_slab(folio)) ------------[ cut here ]------------ kernel BUG at include/linux/memcontrol.h:379! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6000 Comm: syz-executor.3 Tainted: G B W 6.3.0-rc4-syzkaller-g59caa87f9dfb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __folio_memcg include/linux/memcontrol.h:379 [inline] pc : folio_memcg+0x148/0x174 include/linux/memcontrol.h:432 lr : __folio_memcg include/linux/memcontrol.h:379 [inline] lr : folio_memcg+0x148/0x174 include/linux/memcontrol.h:432 sp : ffff80001e337670 x29: ffff80001e337670 x28: ffff000132f4d770 x27: ffff000132f48430 x26: ffff0000c6cedc28 x25: ffff0000c6cedc20 x24: dfff800000000000 x23: 1fffff80007d5241 x22: dfff800000000000 x21: 0000000000000000 x20: fffffc0003ea9208 x19: fffffc0003ea9200 x18: 1fffe0003685afb6 x17: 0000000000000000 x16: ffff8000122e7a54 x15: 0000000000000000 x14: 0000000000000000 x13: 00000000000137f8 x12: 0000000000000001 x11: ff80800008832fd8 x10: 0000000000000000 x9 : ffff800008832fd8 x8 : ffff0000d1b2b680 x7 : 00000000000137f8 x6 : 00000000000137b8 x5 : ffff80001e336ef8 x4 : ffff800015c32b68 x3 : ffff80000858b9b4 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000003c Call trace: __folio_memcg include/linux/memcontrol.h:379 [inline] folio_memcg+0x148/0x174 include/linux/memcontrol.h:432 page_memcg include/linux/memcontrol.h:437 [inline] __mod_lruvec_page_state+0x110/0x2ec mm/memcontrol.c:845 mod_lruvec_page_state include/linux/vmstat.h:562 [inline] free_large_kmalloc+0xa4/0x138 mm/slab_common.c:942 kfree+0x104/0x1a8 mm/slab_common.c:1013 diUnmount+0xf4/0x10c fs/jfs/jfs_imap.c:195 jfs_umount+0x15c/0x360 fs/jfs/jfs_umount.c:63 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x328 fs/super.c:500 kill_block_super+0x70/0xdc fs/super.c:1407 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1302 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+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: b004da01 91308021 aa1303e0 97f9ce6b (d4210000) ---[ end trace 0000000000000000 ]---