------------[ cut here ]------------ WARNING: CPU: 1 PID: 6019 at mm/slab_common.c:934 free_large_kmalloc+0x34/0x12c mm/slab_common.c:935 Modules linked in: CPU: 1 PID: 6019 Comm: syz-executor.4 Not tainted 6.4.0-rc5-syzkaller-g177239177378 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : free_large_kmalloc+0x34/0x12c mm/slab_common.c:935 lr : kfree+0xf8/0x19c mm/slab_common.c:1009 sp : ffff800096b67700 x29: ffff800096b67700 x28: ffff00012f8bc4f0 x27: ffff00012fa569f0 x26: ffff0000ce6dd428 x25: ffff0000ce6dd420 x24: 0000000000000000 x23: ffff00012fa50430 x22: dfff800000000000 x21: ffff80008082df98 x20: ffff0001286d8000 x19: fffffc0004a1b600 x18: 1fffe00036848bc6 x17: ffff80008debd000 x16: ffff80008a43bfbc x15: 0000000000000003 x14: 1ffff00011bd80ac x13: dfff800000000000 x12: 000000000000000f x11: 0000000000000000 x10: 0000000000000000 x9 : 05ffc00000000000 x8 : ffff800090b04000 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : 0000000000000030 x2 : 0000000000000008 x1 : ffff0001286d8000 x0 : fffffc0004a1b600 Call trace: free_large_kmalloc+0x34/0x12c mm/slab_common.c:935 kfree+0xf8/0x19c mm/slab_common.c:1009 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:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 1197782 hardirqs last enabled at (1197781): [] __call_rcu_common kernel/rcu/tree.c:2663 [inline] hardirqs last enabled at (1197781): [] call_rcu+0x63c/0xaf4 kernel/rcu/tree.c:2741 hardirqs last disabled at (1197782): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:407 softirqs last enabled at (1197636): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1197634): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- object pointer: 0x0000000042c432d8 ================================================================== BUG: KASAN: double-free in kfree+0xf8/0x19c mm/slab_common.c:1009 Free of addr ffff0001286d8000 by task syz-executor.4/6019 CPU: 1 PID: 6019 Comm: syz-executor.4 Tainted: G W 6.4.0-rc5-syzkaller-g177239177378 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __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:351 [inline] print_report+0x174/0x514 mm/kasan/report.c:462 kasan_report_invalid_free+0xc4/0x114 mm/kasan/report.c:537 __kasan_kfree_large+0xa4/0xc0 mm/kasan/common.c:272 kasan_kfree_large include/linux/kasan.h:170 [inline] free_large_kmalloc+0x64/0x12c mm/slab_common.c:938 kfree+0xf8/0x19c mm/slab_common.c:1009 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:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Allocated by task 5975: 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:966 [inline] __kmalloc_node_track_caller+0xd0/0x1c0 mm/slab_common.c:986 kmalloc_reserve+0x120/0x240 net/core/skbuff.c:585 __alloc_skb+0x1c8/0x3d8 net/core/skbuff.c:654 alloc_skb include/linux/skbuff.h:1288 [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:2405 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2552 kthread+0x288/0x310 kernel/kthread.c:379 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:853 Freed by task 5975: 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:3786 [inline] __kmem_cache_free+0x2a8/0x49c mm/slub.c:3799 kfree+0xb8/0x19c mm/slab_common.c:1015 skb_kfree_head net/core/skbuff.c:906 [inline] skb_free_head+0xd0/0x198 net/core/skbuff.c:918 skb_release_data+0x444/0x5c8 net/core/skbuff.c:948 skb_release_all net/core/skbuff.c:1014 [inline] __kfree_skb net/core/skbuff.c:1028 [inline] consume_skb+0x14c/0x414 net/core/skbuff.c:1244 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:2405 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2552 kthread+0x288/0x310 kernel/kthread.c:379 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:853 The buggy address belongs to the object at ffff0001286d8000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes inside of 4096-byte region [ffff0001286d8000, ffff0001286d9000) The buggy address belongs to the physical page: page:00000000da880978 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1686d8 head:00000000da880978 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000010200 ffff0000c0002a80 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0001286d7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0001286d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0001286d8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0001286d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0001286d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== page:00000000da880978 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1686d8 head:00000000da880978 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() 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:380! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6019 Comm: syz-executor.4 Tainted: G B W 6.4.0-rc5-syzkaller-g177239177378 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __folio_memcg include/linux/memcontrol.h:380 [inline] pc : folio_memcg+0x148/0x174 include/linux/memcontrol.h:433 lr : __folio_memcg include/linux/memcontrol.h:380 [inline] lr : folio_memcg+0x148/0x174 include/linux/memcontrol.h:433 sp : ffff800096b67670 x29: ffff800096b67670 x28: ffff00012f8bc4f0 x27: ffff00012fa569f0 x26: ffff0000ce6dd428 x25: ffff0000ce6dd420 x24: dfff800000000000 x23: 1fffff80009436c1 x22: dfff800000000000 x21: 0000000000000000 x20: fffffc0004a1b608 x19: fffffc0004a1b600 x18: 1fffe000368447c6 x17: 0000000000000000 x16: ffff80008a388eb0 x15: 0000000000000001 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : ffff0000da468000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800096b66ef8 x4 : ffff80008df9ee80 x3 : ffff80008035d5ec x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000003c Call trace: __folio_memcg include/linux/memcontrol.h:380 [inline] folio_memcg+0x148/0x174 include/linux/memcontrol.h:433 page_memcg include/linux/memcontrol.h:438 [inline] __mod_lruvec_page_state+0x110/0x2ec mm/memcontrol.c:874 mod_lruvec_page_state include/linux/vmstat.h:568 [inline] free_large_kmalloc+0x98/0x12c mm/slab_common.c:941 kfree+0xf8/0x19c mm/slab_common.c:1009 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:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: d004e321 91390021 aa1303e0 97f99338 (d4210000) ---[ end trace 0000000000000000 ]---