------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 24391 at lib/refcount.c:25 refcount_warn_saturate+0x180/0x1c8 lib/refcount.c:25 Modules linked in: CPU: 1 PID: 24391 Comm: syz-executor.0 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff800021aa3ae0 x29: ffff800021aa3ae0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff000115a4bd68 x25: 0000000000000000 x24: ffff00011590f980 x23: ffff80000b222988 x22: 0000000000000000 x21: ffff00011590f8c0 x20: 0000000000000002 x19: ffff80000d95e000 x18: 00000000000000c0 x17: ffff80000dda8198 x16: ffff80000dbe6158 x15: ffff000123d4b480 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000123d4b480 x11: ff808000081c4d64 x10: 0000000000000000 x9 : c7df66836b971400 x8 : c7df66836b971400 x7 : ffff80000c091ebc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 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:771 [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+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x2dc/0xcac kernel/exit.c:820 do_group_exit+0x98/0xcc kernel/exit.c:950 get_signal+0xabc/0xb2c kernel/signal.c:2858 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1076 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1129 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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 120528 hardirqs last enabled at (120527): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (120528): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (118954): [] sock_orphan include/net/sock.h:2094 [inline] softirqs last enabled at (118954): [] netlink_release+0x68/0x4b8 net/netlink/af_netlink.c:757 softirqs last disabled at (118952): [] sock_orphan include/net/sock.h:2090 [inline] softirqs last disabled at (118952): [] netlink_release+0x4c/0x4b8 net/netlink/af_netlink.c:757 ---[ 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: 24391 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 24391 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 24391 Comm: syz-executor.0 Tainted: G W 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff800021aa3a10 x29: ffff800021aa3a10 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff000115a4bd68 x25: 0000000000000000 x24: ffff00011590f980 x23: ffff80000f02a988 x22: ffff80000d37c000 x21: ffff80000f143000 x20: ffff80000c0cf7d0 x19: ffff000114dd3570 x18: 00000000000000c0 x17: 203a657079742074 x16: ffff80000dbe6158 x15: ffff000123d4b480 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000123d4b480 x11: ff808000081c4d64 x10: 0000000000000000 x9 : c7df66836b971400 x8 : c7df66836b971400 x7 : ffff80000c091ebc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 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:3348 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+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x2dc/0xcac kernel/exit.c:820 do_group_exit+0x98/0xcc kernel/exit.c:950 get_signal+0xabc/0xb2c kernel/signal.c:2858 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1076 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1129 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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 120718 hardirqs last enabled at (120717): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (120718): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (120694): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (120694): [] lock_sock_nested+0xc0/0xd8 net/core/sock.c:3454 softirqs last disabled at (120692): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (120692): [] lock_sock_nested+0x88/0xd8 net/core/sock.c:3450 ---[ 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:1986 [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: 24391 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 24391 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 24391 Comm: syz-executor.0 Tainted: G W 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff800021aa3a10 x29: ffff800021aa3a10 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff000115a4bd68 x25: 0000000000000000 x24: ffff00011590f980 x23: ffff80000f02a988 x22: ffff80000d37c000 x21: ffff80000f143000 x20: ffff80000c0cf7d0 x19: ffff000114dd35c0 x18: 00000000000000c0 x17: 203a657079742074 x16: ffff80000dbe6158 x15: ffff000123d4b480 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000123d4b480 x11: ff808000081c4d64 x10: 0000000000000000 x9 : c7df66836b971400 x8 : c7df66836b971400 x7 : ffff80000c091ebc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 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:3348 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+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x2dc/0xcac kernel/exit.c:820 do_group_exit+0x98/0xcc kernel/exit.c:950 get_signal+0xabc/0xb2c kernel/signal.c:2858 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1076 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1129 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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 120914 hardirqs last enabled at (120913): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (120914): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (120908): [] _stext+0x2e4/0x37c softirqs last disabled at (120899): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ 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:1986 [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: 1 PID: 24391 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 24391 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 24391 Comm: syz-executor.0 Tainted: G W 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff800021aa3a10 x29: ffff800021aa3a10 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff000115a4bd68 x25: 0000000000000000 x24: ffff00011590f980 x23: ffff80000f02a988 x22: ffff80000d37c000 x21: ffff80000f143000 x20: ffff80000c0cf7d0 x19: ffff000114dd3610 x18: 000000000000031b x17: 203a657079742074 x16: ffff80000dbe6158 x15: ffff000123d4b480 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000123d4b480 x11: ff808000081c4d64 x10: 0000000000000000 x9 : c7df66836b971400 x8 : c7df66836b971400 x7 : ffff80000c091ebc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 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:3348 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+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x2dc/0xcac kernel/exit.c:820 do_group_exit+0x98/0xcc kernel/exit.c:950 get_signal+0xabc/0xb2c kernel/signal.c:2858 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1076 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1129 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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 121264 hardirqs last enabled at (121263): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (121264): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (121246): [] _stext+0x2e4/0x37c softirqs last disabled at (121229): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ 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:1986 [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: 1 PID: 24391 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 24391 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 24391 Comm: syz-executor.0 Tainted: G W 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff800021aa3a10 x29: ffff800021aa3a10 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff000115a4bd68 x25: 0000000000000000 x24: ffff00011590f980 x23: ffff80000f02a988 x22: ffff80000d37c000 x21: ffff80000f143000 x20: ffff80000c0cf7d0 x19: ffff000114dd3660 x18: 000000000000031b x17: 203a657079742074 x16: ffff80000dbe6158 x15: ffff000123d4b480 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000123d4b480 x11: ff808000081c4d64 x10: 0000000000000000 x9 : c7df66836b971400 x8 : c7df66836b971400 x7 : ffff80000c091ebc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefddcd0 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:3348 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+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x2dc/0xcac kernel/exit.c:820 do_group_exit+0x98/0xcc kernel/exit.c:950 get_signal+0xabc/0xb2c kernel/signal.c:2858 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1076 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1129 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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 121418 hardirqs last enabled at (121417): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (121418): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (121388): [] _stext+0x2e4/0x37c softirqs last disabled at (121267): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ 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:1986 [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: 1 PID: 24391 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 24391 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 24391 Comm: syz-executor.0 Tainted: G W 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff800021aa3a00 x29: ffff800021aa3a00 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff000115a4bd68 x25: 0000000000000000 x24: ffff00011590f980 x23: ffff80000f02a988 x22: ffff80000d37c000 x21: ffff80000f143000 x20: ffff80000c0cf7d0 x19: ffff000114dd32f8 x18: 000000000000031b x17: 203a657079742074 x16: ffff80000dbe6158 x15: ffff000123d4b480 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000123d4b480 x11: ff808000081c4d64 x10: 0000000000000000 x9 : c7df66836b971400 x8 : c7df66836b971400 x7 : ffff80000c091ebc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 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:3348 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+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x2dc/0xcac kernel/exit.c:820 do_group_exit+0x98/0xcc kernel/exit.c:950 get_signal+0xabc/0xb2c kernel/signal.c:2858 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1076 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1129 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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 121586 hardirqs last enabled at (121585): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (121586): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (121580): [] _stext+0x2e4/0x37c softirqs last disabled at (121575): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 0 PID: 24391 at lib/refcount.c:28 refcount_warn_saturate+0x1a0/0x1c8 lib/refcount.c:28 Modules linked in: CPU: 0 PID: 24391 Comm: syz-executor.0 Tainted: G W 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff800021aa3ae0 x29: ffff800021aa3ae0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff000115a4bd68 x25: 0000000000000000 x24: ffff00011590f980 x23: ffff80000b222988 x22: 0000000000000000 x21: 00000000c0000000 x20: 0000000000000003 x19: ffff80000d95e000 x18: 00000000000002a6 x17: ffff80000c0cd83c x16: ffff80000dbe6158 x15: ffff000123d4b480 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff000123d4b480 x11: ff808000081c4d64 x10: 0000000000000000 x9 : c7df66836b971400 x8 : c7df66836b971400 x7 : ffff80000c091ebc 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:1986 [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+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x2dc/0xcac kernel/exit.c:820 do_group_exit+0x98/0xcc kernel/exit.c:950 get_signal+0xabc/0xb2c kernel/signal.c:2858 do_signal+0x128/0x438 arch/arm64/kernel/signal.c:1076 do_notify_resume+0xc0/0x1f0 arch/arm64/kernel/signal.c:1129 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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 121678 hardirqs last enabled at (121677): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (121678): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (121660): [] _stext+0x2e4/0x37c softirqs last disabled at (121645): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]---