------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 0 PID: 4016 at lib/refcount.c:25 refcount_warn_saturate+0x180/0x1c8 lib/refcount.c:25
Modules linked in:
CPU: 0 PID: 4016 Comm: syz-executor.0 Not tainted 6.0.0-rc7-syzkaller-18098-g5911b92626df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x180/0x1c8 lib/refcount.c:25
lr : refcount_warn_saturate+0x180/0x1c8 lib/refcount.c:25
sp : ffff800015c13ae0
x29: ffff800015c13ae0 x28: 00000000002e0003 x27: 00000000000000a1
x26: ffff0000ca7fbd68 x25: 0000000000000000 x24: ffff0000ca6a80c0
x23: ffff80000b1ba318 x22: 0000000000000000 x21: ffff0000ca6a8000
x20: 0000000000000002 x19: ffff80000d8c8000 x18: 00000000000003c8
x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff0000d1d09a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000d1d09a80
x11: ff808000081c0d5c x10: 0000000000000000 x9 : 1fd765d93bfe6b00
x8 : 1fd765d93bfe6b00 x7 : ffff800008161d1c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefbecd0 x1 : 0000000100000000 x0 : 000000000000002a
Call trace:
 refcount_warn_saturate+0x180/0x1c8 lib/refcount.c:25
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 sock_hold include/net/sock.h:774 [inline]
 nr_release+0x218/0x274 net/netrom/af_netrom.c:520
 __sock_release net/socket.c:650 [inline]
 sock_close+0x50/0xf0 net/socket.c:1365
 __fput+0x198/0x3dc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x14c kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x26c/0xbe0 kernel/exit.c:795
 do_group_exit+0x70/0xe8 kernel/exit.c:925
 get_signal+0xb0c/0xb40 kernel/signal.c:2857
 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071
 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124
 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/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 20576
hardirqs last  enabled at (20575): [<ffff800008161dac>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (20575): [<ffff800008161dac>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942
hardirqs last disabled at (20576): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (20568): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (20485): [<ffff800008017c14>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_t1timer_expiry+0x0/0x1e0 net/netrom/nr_timer.c:46
WARNING: CPU: 1 PID: 4016 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline]
WARNING: CPU: 1 PID: 4016 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
Modules linked in:
CPU: 1 PID: 4016 Comm: syz-executor.0 Tainted: G        W          6.0.0-rc7-syzkaller-18098-g5911b92626df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:502 [inline]
pc : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
lr : debug_print_object lib/debugobjects.c:502 [inline]
lr : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
sp : ffff800015c13a10
x29: ffff800015c13a10 x28: 00000000002e0003 x27: 00000000000000a1
x26: ffff0000ca7fbd68 x25: 0000000000000000 x24: ffff0000ca6a80c0
x23: ffff80000f08ff80 x22: ffff80000d30c000 x21: ffff80000f0a5000
x20: ffff80000bfff5b8 x19: ffff0000d005e560 x18: 00000000000000c0
x17: ffff80000dd0b198 x16: ffff80000db49158 x15: ffff0000d1d09a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000d1d09a80
x11: ff808000081c0d5c x10: 0000000000000000 x9 : 1fd765d93bfe6b00
x8 : 1fd765d93bfe6b00 x7 : ffff8000095d308c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefddcd0 x1 : 0000000100000000 x0 : 000000000000006c
Call trace:
 debug_print_object lib/debugobjects.c:502 [inline]
 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
 debug_timer_assert_init kernel/time/timer.c:792 [inline]
 debug_assert_init kernel/time/timer.c:837 [inline]
 del_timer+0x34/0x1a8 kernel/time/timer.c:1257
 sk_stop_timer+0x24/0xb4 net/core/sock.c:3294
 nr_stop_t1timer+0x24/0x34 net/netrom/nr_timer.c:84
 nr_disconnect+0x24/0xc0 net/netrom/nr_subr.c:261
 nr_release+0x178/0x274 net/netrom/af_netrom.c:529
 __sock_release net/socket.c:650 [inline]
 sock_close+0x50/0xf0 net/socket.c:1365
 __fput+0x198/0x3dc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x14c kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x26c/0xbe0 kernel/exit.c:795
 do_group_exit+0x70/0xe8 kernel/exit.c:925
 get_signal+0xb0c/0xb40 kernel/signal.c:2857
 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071
 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124
 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/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 20738
hardirqs last  enabled at (20737): [<ffff8000081e8370>] call_rcu+0x2f0/0x484 kernel/rcu/tree.c:2828
hardirqs last disabled at (20738): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (20692): [<ffff80000b1c7458>] spin_unlock_bh include/linux/spinlock.h:394 [inline]
softirqs last  enabled at (20692): [<ffff80000b1c7458>] lock_sock_nested+0xc0/0xd8 net/core/sock.c:3400
softirqs last disabled at (20690): [<ffff80000b1c7420>] spin_lock_bh include/linux/spinlock.h:354 [inline]
softirqs last disabled at (20690): [<ffff80000b1c7420>] lock_sock_nested+0x88/0xd8 net/core/sock.c:3396
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:177 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: sock_put include/net/sock.h:1961 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_t2timer_expiry+0x0/0x104 net/netrom/nr_timer.c:246
WARNING: CPU: 1 PID: 4016 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline]
WARNING: CPU: 1 PID: 4016 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
Modules linked in:
CPU: 1 PID: 4016 Comm: syz-executor.0 Tainted: G        W          6.0.0-rc7-syzkaller-18098-g5911b92626df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:502 [inline]
pc : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
lr : debug_print_object lib/debugobjects.c:502 [inline]
lr : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
sp : ffff800015c13a10
x29: ffff800015c13a10 x28: 00000000002e0003 x27: 00000000000000a1
x26: ffff0000ca7fbd68 x25: 0000000000000000 x24: ffff0000ca6a80c0
x23: ffff80000f08ff80 x22: ffff80000d30c000 x21: ffff80000f0a5000
x20: ffff80000bfff5b8 x19: ffff0000d005e5b0 x18: 0000000000000372
x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff0000d1d09a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000d1d09a80
x11: ff808000081c0d5c x10: 0000000000000000 x9 : 1fd765d93bfe6b00
x8 : 1fd765d93bfe6b00 x7 : ffff800008161d1c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : 0000000100000000 x0 : 000000000000006c
Call trace:
 debug_print_object lib/debugobjects.c:502 [inline]
 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
 debug_timer_assert_init kernel/time/timer.c:792 [inline]
 debug_assert_init kernel/time/timer.c:837 [inline]
 del_timer+0x34/0x1a8 kernel/time/timer.c:1257
 sk_stop_timer+0x24/0xb4 net/core/sock.c:3294
 nr_stop_t2timer+0x24/0x34 net/netrom/nr_timer.c:89
 nr_disconnect+0x2c/0xc0 net/netrom/nr_subr.c:262
 nr_release+0x178/0x274 net/netrom/af_netrom.c:529
 __sock_release net/socket.c:650 [inline]
 sock_close+0x50/0xf0 net/socket.c:1365
 __fput+0x198/0x3dc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x14c kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x26c/0xbe0 kernel/exit.c:795
 do_group_exit+0x70/0xe8 kernel/exit.c:925
 get_signal+0xb0c/0xb40 kernel/signal.c:2857
 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071
 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124
 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/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 20826
hardirqs last  enabled at (20825): [<ffff800008161dac>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (20825): [<ffff800008161dac>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942
hardirqs last disabled at (20826): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (20802): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (20791): [<ffff800008017c14>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:177 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: sock_put include/net/sock.h:1961 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_t4timer_expiry+0x0/0xe0 net/netrom/nr_timer.c:162
WARNING: CPU: 0 PID: 4016 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline]
WARNING: CPU: 0 PID: 4016 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
Modules linked in:
CPU: 0 PID: 4016 Comm: syz-executor.0 Tainted: G        W          6.0.0-rc7-syzkaller-18098-g5911b92626df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:502 [inline]
pc : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
lr : debug_print_object lib/debugobjects.c:502 [inline]
lr : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
sp : ffff800015c13a10
x29: ffff800015c13a10 x28: 00000000002e0003 x27: 00000000000000a1
x26: ffff0000ca7fbd68 x25: 0000000000000000 x24: ffff0000ca6a80c0
x23: ffff80000f08ff80 x22: ffff80000d30c000 x21: ffff80000f0a5000
x20: ffff80000bfff5b8 x19: ffff0000d005e600 x18: 0000000000005d3f
x17: 000000000000b67e x16: ffff80000db49158 x15: ffff0000d1d09a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000d1d09a80
x11: ff808000081c0d5c x10: 0000000000000000 x9 : 1fd765d93bfe6b00
x8 : 1fd765d93bfe6b00 x7 : ffff800008161d1c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefbecd0 x1 : 0000000100000000 x0 : 000000000000006b
Call trace:
 debug_print_object lib/debugobjects.c:502 [inline]
 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
 debug_timer_assert_init kernel/time/timer.c:792 [inline]
 debug_assert_init kernel/time/timer.c:837 [inline]
 del_timer+0x34/0x1a8 kernel/time/timer.c:1257
 sk_stop_timer+0x24/0xb4 net/core/sock.c:3294
 nr_stop_t4timer+0x24/0x34 net/netrom/nr_timer.c:94
 nr_disconnect+0x34/0xc0 net/netrom/nr_subr.c:263
 nr_release+0x178/0x274 net/netrom/af_netrom.c:529
 __sock_release net/socket.c:650 [inline]
 sock_close+0x50/0xf0 net/socket.c:1365
 __fput+0x198/0x3dc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x14c kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x26c/0xbe0 kernel/exit.c:795
 do_group_exit+0x70/0xe8 kernel/exit.c:925
 get_signal+0xb0c/0xb40 kernel/signal.c:2857
 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071
 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124
 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/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 20970
hardirqs last  enabled at (20969): [<ffff800008161dac>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (20969): [<ffff800008161dac>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942
hardirqs last disabled at (20970): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (20940): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (20927): [<ffff800008017c14>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:177 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: sock_put include/net/sock.h:1961 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_idletimer_expiry+0x0/0x194 net/netrom/nr_timer.c:173
WARNING: CPU: 0 PID: 4016 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline]
WARNING: CPU: 0 PID: 4016 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
Modules linked in:
CPU: 0 PID: 4016 Comm: syz-executor.0 Tainted: G        W          6.0.0-rc7-syzkaller-18098-g5911b92626df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:502 [inline]
pc : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
lr : debug_print_object lib/debugobjects.c:502 [inline]
lr : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
sp : ffff800015c13a10
x29: ffff800015c13a10 x28: 00000000002e0003 x27: 00000000000000a1
x26: ffff0000ca7fbd68 x25: 0000000000000000 x24: ffff0000ca6a80c0
x23: ffff80000f08ff80 x22: ffff80000d30c000 x21: ffff80000f0a5000
x20: ffff80000bfff5b8 x19: ffff0000d005e650 x18: 0000000000000041
x17: 0000000000000000 x16: ffff80000db49158 x15: ffff0000d1d09a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000d1d09a80
x11: ff808000081c0d5c x10: 0000000000000000 x9 : 1fd765d93bfe6b00
x8 : 1fd765d93bfe6b00 x7 : ffff800008161d1c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : 0000000100000000 x0 : 000000000000006e
Call trace:
 debug_print_object lib/debugobjects.c:502 [inline]
 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
 debug_timer_assert_init kernel/time/timer.c:792 [inline]
 debug_assert_init kernel/time/timer.c:837 [inline]
 del_timer+0x34/0x1a8 kernel/time/timer.c:1257
 sk_stop_timer+0x24/0xb4 net/core/sock.c:3294
 nr_stop_idletimer+0x24/0x34 net/netrom/nr_timer.c:99
 nr_disconnect+0x3c/0xc0 net/netrom/nr_subr.c:264
 nr_release+0x178/0x274 net/netrom/af_netrom.c:529
 __sock_release net/socket.c:650 [inline]
 sock_close+0x50/0xf0 net/socket.c:1365
 __fput+0x198/0x3dc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x14c kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x26c/0xbe0 kernel/exit.c:795
 do_group_exit+0x70/0xe8 kernel/exit.c:925
 get_signal+0xb0c/0xb40 kernel/signal.c:2857
 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071
 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124
 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/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 21222
hardirqs last  enabled at (21221): [<ffff800008161dac>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (21221): [<ffff800008161dac>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942
hardirqs last disabled at (21222): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (21200): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (21191): [<ffff800008017c14>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:177 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: sock_put include/net/sock.h:1961 [inline]
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_heartbeat_expiry+0x0/0x1f4 net/netrom/nr_timer.c:202
WARNING: CPU: 0 PID: 4016 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline]
WARNING: CPU: 0 PID: 4016 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
Modules linked in:
CPU: 0 PID: 4016 Comm: syz-executor.0 Tainted: G        W          6.0.0-rc7-syzkaller-18098-g5911b92626df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:502 [inline]
pc : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
lr : debug_print_object lib/debugobjects.c:502 [inline]
lr : debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
sp : ffff800015c13a00
x29: ffff800015c13a00 x28: 00000000002e0003 x27: 00000000000000a1
x26: ffff0000ca7fbd68 x25: 0000000000000000 x24: ffff0000ca6a80c0
x23: ffff80000f08ff80 x22: ffff80000d30c000 x21: ffff80000f0a5000
x20: ffff80000bfff5b8 x19: ffff0000d005e2f8 x18: 000000000000006f
x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff0000d1d09a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000d1d09a80
x11: ff808000081c0d5c x10: 0000000000000000 x9 : 1fd765d93bfe6b00
x8 : 1fd765d93bfe6b00 x7 : ffff800008161d1c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefbecd0 x1 : 0000000100000000 x0 : 000000000000006e
Call trace:
 debug_print_object lib/debugobjects.c:502 [inline]
 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892
 debug_timer_assert_init kernel/time/timer.c:792 [inline]
 debug_assert_init kernel/time/timer.c:837 [inline]
 del_timer+0x34/0x1a8 kernel/time/timer.c:1257
 sk_stop_timer+0x24/0xb4 net/core/sock.c:3294
 nr_stop_heartbeat+0x24/0x34 net/netrom/nr_timer.c:104
 nr_destroy_socket+0xb4/0x298 net/netrom/af_netrom.c:263
 nr_release+0x180/0x274 net/netrom/af_netrom.c:530
 __sock_release net/socket.c:650 [inline]
 sock_close+0x50/0xf0 net/socket.c:1365
 __fput+0x198/0x3dc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x14c kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x26c/0xbe0 kernel/exit.c:795
 do_group_exit+0x70/0xe8 kernel/exit.c:925
 get_signal+0xb0c/0xb40 kernel/signal.c:2857
 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071
 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124
 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/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 21324
hardirqs last  enabled at (21323): [<ffff800008161dac>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (21323): [<ffff800008161dac>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942
hardirqs last disabled at (21324): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (21316): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (21301): [<ffff800008017c14>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 4016 at lib/refcount.c:28 refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 4016 Comm: syz-executor.0 Tainted: G        W          6.0.0-rc7-syzkaller-18098-g5911b92626df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
lr : refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
sp : ffff800015c13ae0
x29: ffff800015c13ae0 x28: 00000000002e0003 x27: 00000000000000a1
x26: ffff0000ca7fbd68 x25: 0000000000000000 x24: ffff0000ca6a80c0
x23: ffff80000b1ba318 x22: 0000000000000000 x21: 00000000c0000000
x20: 0000000000000003 x19: ffff80000d8c8000 x18: 000000000000006f
x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff0000d1d09a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000d1d09a80
x11: ff808000081c0d5c x10: 0000000000000000 x9 : 1fd765d93bfe6b00
x8 : 1fd765d93bfe6b00 x7 : ffff80000819545c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000026
Call trace:
 refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28
 __refcount_sub_and_test include/linux/refcount.h:283 [inline]
 __refcount_dec_and_test include/linux/refcount.h:315 [inline]
 refcount_dec_and_test include/linux/refcount.h:333 [inline]
 sock_put include/net/sock.h:1961 [inline]
 nr_release+0x22c/0x274 net/netrom/af_netrom.c:554
 __sock_release net/socket.c:650 [inline]
 sock_close+0x50/0xf0 net/socket.c:1365
 __fput+0x198/0x3dc fs/file_table.c:320
 ____fput+0x20/0x30 fs/file_table.c:353
 task_work_run+0xc4/0x14c kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x26c/0xbe0 kernel/exit.c:795
 do_group_exit+0x70/0xe8 kernel/exit.c:925
 get_signal+0xb0c/0xb40 kernel/signal.c:2857
 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1071
 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1124
 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/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 21458
hardirqs last  enabled at (21457): [<ffff8000081befc8>] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:264
hardirqs last disabled at (21458): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (21436): [<ffff80000b1bce74>] spin_unlock_bh include/linux/spinlock.h:394 [inline]
softirqs last  enabled at (21436): [<ffff80000b1bce74>] release_sock+0xf4/0x108 net/core/sock.c:3419
softirqs last disabled at (21434): [<ffff80000b1bcdac>] spin_lock_bh include/linux/spinlock.h:354 [inline]
softirqs last disabled at (21434): [<ffff80000b1bcdac>] release_sock+0x2c/0x108 net/core/sock.c:3406
---[ end trace 0000000000000000 ]---