------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 0 PID: 5437 at lib/refcount.c:25 refcount_warn_saturate+0x188/0x1d0 lib/refcount.c:25 Modules linked in: CPU: 0 PID: 5437 Comm: syz-executor.3 Not tainted 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : refcount_warn_saturate+0x188/0x1d0 lib/refcount.c:25 lr : refcount_warn_saturate+0x188/0x1d0 lib/refcount.c:25 sp : ffff800018f13b90 x29: ffff800018f13b90 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000febc4270 x25: ffff0000fe96a900 x24: ffff80000b140b58 x23: ffff0000fe96a900 x22: 0000000000000000 x21: ffff000101359880 x20: 0000000000000002 x19: ffff80000d94d000 x18: ffff80000bfae9bc x17: 000000000000ba7e x16: ffff00010239bdf8 x15: ffff80000dbd2118 x14: ffff00010239b400 x13: 00000000ffffffff x12: ffff00010239b400 x11: ff808000081bbb4c x10: 0000000000000000 x9 : c2543e8ba8cbd200 x8 : c2543e8ba8cbd200 x7 : ffff8000081634cc x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefbff08 x1 : 0000000100000000 x0 : 000000000000002a Call trace: refcount_warn_saturate+0x188/0x1d0 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:775 [inline] nr_release+0x218/0x274 net/netrom/af_netrom.c:525 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf4 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x165c/0x2628 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/0x14c 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: 11856 hardirqs last enabled at (11855): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline] hardirqs last enabled at (11855): [] finish_lock_switch+0x94/0xe4 kernel/sched/core.c:5052 hardirqs last disabled at (11856): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (11782): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (11780): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object: 00000000cd80db80 object type: timer_list hint: nr_t1timer_expiry+0x0/0x1e8 net/netrom/nr_timer.c:46 WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_print_object lib/debugobjects.c:509 [inline] WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 Modules linked in: CPU: 1 PID: 5437 Comm: syz-executor.3 Tainted: G W 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:509 [inline] pc : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 lr : debug_print_object lib/debugobjects.c:509 [inline] lr : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 sp : ffff800018f13aa0 x29: ffff800018f13aa0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000febc4270 x25: ffff0000fe96a900 x24: ffff80000b140b58 x23: ffff80000f097d78 x22: ffff80000d36c000 x21: ffff80000f130000 x20: ffff80000bfb0900 x19: ffff000101359d70 x18: 0000000000000000 x17: 0000000000000000 x16: ffff00010239be20 x15: ffff80000dbd2118 x14: ffff00010239b400 x13: 00000000ffffffff x12: ffff00010239b400 x11: ff808000081bbb4c x10: 0000000000000000 x9 : c2543e8ba8cbd200 x8 : c2543e8ba8cbd200 x7 : ffff8000081634cc x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : 0000000100000000 x0 : 0000000000000085 Call trace: debug_print_object lib/debugobjects.c:509 [inline] debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __timer_delete+0x3c/0x198 kernel/time/timer.c:1321 timer_delete+0x24/0x34 kernel/time/timer.c:1361 del_timer include/linux/timer.h:213 [inline] sk_stop_timer+0x24/0xb4 net/core/sock.c:3370 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:534 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf4 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x165c/0x2628 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/0x14c 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: 12082 hardirqs last enabled at (12081): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline] hardirqs last enabled at (12081): [] finish_lock_switch+0x94/0xe4 kernel/sched/core.c:5052 hardirqs last disabled at (12082): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (12048): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (12048): [] lock_sock_nested+0xc0/0xd8 net/core/sock.c:3477 softirqs last disabled at (12046): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (12046): [] lock_sock_nested+0x88/0xd8 net/core/sock.c:3473 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object: 000000009394dadd 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: 000000009394dadd 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: 000000009394dadd object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline] ODEBUG: assert_init not available (active state 0) object: 000000009394dadd object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline] ODEBUG: assert_init not available (active state 0) object: 000000009394dadd object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline] ODEBUG: assert_init not available (active state 0) object: 000000009394dadd object type: timer_list hint: sock_put include/net/sock.h:1990 [inline] ODEBUG: assert_init not available (active state 0) object: 000000009394dadd object type: timer_list hint: nr_t2timer_expiry+0x0/0x104 net/netrom/nr_timer.c:247 WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_print_object lib/debugobjects.c:509 [inline] WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 Modules linked in: CPU: 1 PID: 5437 Comm: syz-executor.3 Tainted: G W 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:509 [inline] pc : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 lr : debug_print_object lib/debugobjects.c:509 [inline] lr : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 sp : ffff800018f13aa0 x29: ffff800018f13aa0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000febc4270 x25: ffff0000fe96a900 x24: ffff80000b140b58 x23: ffff80000f097d78 x22: ffff80000d36c000 x21: ffff80000f130000 x20: ffff80000bfb0900 x19: ffff000101359dc0 x18: ffff80000bfae9bc x17: 0000000000000000 x16: ffff00010239be20 x15: ffff80000dbd2118 x14: ffff00010239b400 x13: 00000000ffffffff x12: ffff00010239b400 x11: ff808000081bbb4c x10: 0000000000000000 x9 : c2543e8ba8cbd200 x8 : c2543e8ba8cbd200 x7 : ffff8000081634cc x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefdef08 x1 : 0000000100000000 x0 : 0000000000000085 Call trace: debug_print_object lib/debugobjects.c:509 [inline] debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __timer_delete+0x3c/0x198 kernel/time/timer.c:1321 timer_delete+0x24/0x34 kernel/time/timer.c:1361 del_timer include/linux/timer.h:213 [inline] sk_stop_timer+0x24/0xb4 net/core/sock.c:3370 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:534 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf4 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x165c/0x2628 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/0x14c 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: 12478 hardirqs last enabled at (12477): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline] hardirqs last enabled at (12477): [] finish_lock_switch+0x94/0xe4 kernel/sched/core.c:5052 hardirqs last disabled at (12478): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (12470): [] _stext+0x54c/0x5e4 softirqs last disabled at (12325): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object: 000000004838d847 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: 000000004838d847 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: 000000004838d847 object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline] ODEBUG: assert_init not available (active state 0) object: 000000004838d847 object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline] ODEBUG: assert_init not available (active state 0) object: 000000004838d847 object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline] ODEBUG: assert_init not available (active state 0) object: 000000004838d847 object type: timer_list hint: sock_put include/net/sock.h:1990 [inline] ODEBUG: assert_init not available (active state 0) object: 000000004838d847 object type: timer_list hint: nr_t4timer_expiry+0x0/0xe0 net/netrom/nr_timer.c:163 WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_print_object lib/debugobjects.c:509 [inline] WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 Modules linked in: CPU: 1 PID: 5437 Comm: syz-executor.3 Tainted: G W 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:509 [inline] pc : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 lr : debug_print_object lib/debugobjects.c:509 [inline] lr : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 sp : ffff800018f13aa0 x29: ffff800018f13aa0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000febc4270 x25: ffff0000fe96a900 x24: ffff80000b140b58 x23: ffff80000f097d78 x22: ffff80000d36c000 x21: ffff80000f130000 x20: ffff80000bfb0900 x19: ffff000101359e10 x18: 0000000000118ed5 x17: ffff80000bfae9bc x16: ffff00010239be20 x15: ffff80000dbd2118 x14: ffff00010239b400 x13: 00000000ffffffff x12: ffff00010239b400 x11: ff808000081bbb4c x10: 0000000000000000 x9 : c2543e8ba8cbd200 x8 : c2543e8ba8cbd200 x7 : ffff8000081634cc x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefdef08 x1 : 0000000100000000 x0 : 0000000000000084 Call trace: debug_print_object lib/debugobjects.c:509 [inline] debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __timer_delete+0x3c/0x198 kernel/time/timer.c:1321 timer_delete+0x24/0x34 kernel/time/timer.c:1361 del_timer include/linux/timer.h:213 [inline] sk_stop_timer+0x24/0xb4 net/core/sock.c:3370 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:534 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf4 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x165c/0x2628 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/0x14c 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: 12952 hardirqs last enabled at (12951): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline] hardirqs last enabled at (12951): [] finish_lock_switch+0x94/0xe4 kernel/sched/core.c:5052 hardirqs last disabled at (12952): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (12944): [] _stext+0x54c/0x5e4 softirqs last disabled at (12817): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object: 0000000058f5867d 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: 0000000058f5867d 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: 0000000058f5867d object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline] ODEBUG: assert_init not available (active state 0) object: 0000000058f5867d object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline] ODEBUG: assert_init not available (active state 0) object: 0000000058f5867d object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline] ODEBUG: assert_init not available (active state 0) object: 0000000058f5867d object type: timer_list hint: sock_put include/net/sock.h:1990 [inline] ODEBUG: assert_init not available (active state 0) object: 0000000058f5867d object type: timer_list hint: nr_idletimer_expiry+0x0/0x1a0 net/netrom/nr_timer.c:174 WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_print_object lib/debugobjects.c:509 [inline] WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 Modules linked in: CPU: 1 PID: 5437 Comm: syz-executor.3 Tainted: G W 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:509 [inline] pc : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 lr : debug_print_object lib/debugobjects.c:509 [inline] lr : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 sp : ffff800018f13aa0 x29: ffff800018f13aa0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000febc4270 x25: ffff0000fe96a900 x24: ffff80000b140b58 x23: ffff80000f097d78 x22: ffff80000d36c000 x21: ffff80000f130000 x20: ffff80000bfb0900 x19: ffff000101359e60 x18: 0000000000000000 x17: 0000000000000000 x16: ffff00010239be20 x15: ffff80000dbd2118 x14: ffff00010239b400 x13: 00000000ffffffff x12: ffff00010239b400 x11: ff808000081bbb4c x10: 0000000000000000 x9 : c2543e8ba8cbd200 x8 : c2543e8ba8cbd200 x7 : ffff8000081634cc x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : 0000000100000000 x0 : 0000000000000087 Call trace: debug_print_object lib/debugobjects.c:509 [inline] debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __timer_delete+0x3c/0x198 kernel/time/timer.c:1321 timer_delete+0x24/0x34 kernel/time/timer.c:1361 del_timer include/linux/timer.h:213 [inline] sk_stop_timer+0x24/0xb4 net/core/sock.c:3370 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:534 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf4 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x165c/0x2628 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/0x14c 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: 13176 hardirqs last enabled at (13175): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline] hardirqs last enabled at (13175): [] finish_lock_switch+0x94/0xe4 kernel/sched/core.c:5052 hardirqs last disabled at (13176): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (13138): [] _stext+0x54c/0x5e4 softirqs last disabled at (12957): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object: 00000000ba22b128 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: 00000000ba22b128 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: 00000000ba22b128 object type: timer_list hint: __refcount_sub_and_test include/linux/refcount.h:272 [inline] ODEBUG: assert_init not available (active state 0) object: 00000000ba22b128 object type: timer_list hint: __refcount_dec_and_test include/linux/refcount.h:315 [inline] ODEBUG: assert_init not available (active state 0) object: 00000000ba22b128 object type: timer_list hint: refcount_dec_and_test include/linux/refcount.h:333 [inline] ODEBUG: assert_init not available (active state 0) object: 00000000ba22b128 object type: timer_list hint: sock_put include/net/sock.h:1990 [inline] ODEBUG: assert_init not available (active state 0) object: 00000000ba22b128 object type: timer_list hint: nr_heartbeat_expiry+0x0/0x284 net/netrom/nr_timer.c:203 WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_print_object lib/debugobjects.c:509 [inline] WARNING: CPU: 1 PID: 5437 at lib/debugobjects.c:512 debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 Modules linked in: CPU: 1 PID: 5437 Comm: syz-executor.3 Tainted: G W 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:509 [inline] pc : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 lr : debug_print_object lib/debugobjects.c:509 [inline] lr : debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 sp : ffff800018f13a90 x29: ffff800018f13a90 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000febc4270 x25: ffff0000fe96a900 x24: ffff80000b140b58 x23: ffff80000f097d78 x22: ffff80000d36c000 x21: ffff80000f130000 x20: ffff80000bfb0900 x19: ffff000101359af8 x18: 0000000000000000 x17: 0000000000000000 x16: ffff00010239be20 x15: ffff80000dbd2118 x14: ffff00010239b400 x13: 00000000ffffffff x12: ffff00010239b400 x11: ff808000081bbb4c x10: 0000000000000000 x9 : c2543e8ba8cbd200 x8 : c2543e8ba8cbd200 x7 : ffff8000081634cc x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : 0000000100000000 x0 : 0000000000000087 Call trace: debug_print_object lib/debugobjects.c:509 [inline] debug_object_assert_init+0x148/0x19c lib/debugobjects.c:899 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __timer_delete+0x3c/0x198 kernel/time/timer.c:1321 timer_delete+0x24/0x34 kernel/time/timer.c:1361 del_timer include/linux/timer.h:213 [inline] sk_stop_timer+0x24/0xb4 net/core/sock.c:3370 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:535 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf4 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x165c/0x2628 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/0x14c 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: 13278 hardirqs last enabled at (13277): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1370 [inline] hardirqs last enabled at (13277): [] finish_lock_switch+0x94/0xe4 kernel/sched/core.c:5052 hardirqs last disabled at (13278): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (13246): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (13246): [] nr_remove_socket net/netrom/af_netrom.c:95 [inline] softirqs last enabled at (13246): [] nr_destroy_socket+0xac/0x298 net/netrom/af_netrom.c:261 softirqs last disabled at (13244): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (13244): [] nr_remove_socket net/netrom/af_netrom.c:93 [inline] softirqs last disabled at (13244): [] nr_destroy_socket+0x28/0x298 net/netrom/af_netrom.c:261 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 0 PID: 5437 at lib/refcount.c:28 refcount_warn_saturate+0x1a8/0x1d0 lib/refcount.c:28 Modules linked in: CPU: 0 PID: 5437 Comm: syz-executor.3 Tainted: G W 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : refcount_warn_saturate+0x1a8/0x1d0 lib/refcount.c:28 lr : refcount_warn_saturate+0x1a8/0x1d0 lib/refcount.c:28 sp : ffff800018f13b90 x29: ffff800018f13b90 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000febc4270 x25: ffff0000fe96a900 x24: ffff80000b140b58 x23: ffff0000fe96a900 x22: 0000000000000000 x21: ffff000101359880 x20: 0000000000000003 x19: ffff80000d94d000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff00010239bdf8 x15: ffff80000dbd2118 x14: ffff00010239b400 x13: 00000000ffffffff x12: ffff00010239b400 x11: ff808000081bbb4c x10: 0000000000000000 x9 : c2543e8ba8cbd200 x8 : c2543e8ba8cbd200 x7 : ffff80000bf650d4 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000026 Call trace: refcount_warn_saturate+0x1a8/0x1d0 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:1990 [inline] nr_release+0x22c/0x274 net/netrom/af_netrom.c:559 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf4 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x165c/0x2628 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/0x14c 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: 13628 hardirqs last enabled at (13627): [] __up_console_sem+0x60/0xb4 kernel/printk/printk.c:345 hardirqs last disabled at (13628): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (13606): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (13606): [] release_sock+0xf4/0x108 net/core/sock.c:3496 softirqs last disabled at (13604): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (13604): [] release_sock+0x2c/0x108 net/core/sock.c:3483 ---[ end trace 0000000000000000 ]---