------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 2841 at lib/refcount.c:25 refcount_warn_saturate+0x180/0x1c8 lib/refcount.c:25 Modules linked in: CPU: 1 PID: 2841 Comm: syz-executor.4 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #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 : ffff80002180bba0 x29: ffff80002180bba0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000ca75bd68 x25: 0000000000000000 x24: ffff0000c9c0d140 x23: ffff80000b1ba318 x22: 0000000000000000 x21: ffff0000c9c0d080 x20: 0000000000000002 x19: ffff80000d8c8000 x18: 0000000000000073 x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff00011b460000 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 00000000000076cc x10: ffff80001a60c000 x9 : 0d4b05a1f4d41e00 x8 : 0d4b05a1f4d41e00 x7 : ffff800008161d1c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefddcd0 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 get_signal+0xac8/0xb40 kernel/signal.c:2634 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: 732 hardirqs last enabled at (731): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (731): [] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942 hardirqs last disabled at (732): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (656): [] spin_unlock_bh include/linux/spinlock.h:394 [inline] softirqs last enabled at (656): [] release_sock+0xf4/0x108 net/core/sock.c:3419 softirqs last disabled at (654): [] spin_lock_bh include/linux/spinlock.h:354 [inline] softirqs last disabled at (654): [] release_sock+0x2c/0x108 net/core/sock.c:3406 ---[ 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: 2841 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 2841 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 2841 Comm: syz-executor.4 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #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 : ffff80002180bad0 x29: ffff80002180bad0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000ca75bd68 x25: 0000000000000000 x24: ffff0000c9c0d140 x23: ffff80000f06a090 x22: ffff80000d30c000 x21: ffff80000f0a5000 x20: ffff80000bfff5b8 x19: ffff00011611cd60 x18: 000000000000009a x17: 0000000000000000 x16: ffff80000db49158 x15: ffff00011b460000 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 00000000000234b8 x10: ffff80001a60c000 x9 : 0d4b05a1f4d41e00 x8 : 0d4b05a1f4d41e00 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_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 get_signal+0xac8/0xb40 kernel/signal.c:2634 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: 806 hardirqs last enabled at (805): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (805): [] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942 hardirqs last disabled at (806): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (774): [] spin_unlock_bh include/linux/spinlock.h:394 [inline] softirqs last enabled at (774): [] lock_sock_nested+0xc0/0xd8 net/core/sock.c:3400 softirqs last disabled at (772): [] spin_lock_bh include/linux/spinlock.h:354 [inline] softirqs last disabled at (772): [] 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: 2841 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 2841 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 2841 Comm: syz-executor.4 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #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 : ffff80002180bad0 x29: ffff80002180bad0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000ca75bd68 x25: 0000000000000000 x24: ffff0000c9c0d140 x23: ffff80000f06a090 x22: ffff80000d30c000 x21: ffff80000f0a5000 x20: ffff80000bfff5b8 x19: ffff00011611cdb0 x18: 0000000000000283 x17: 0000000000000000 x16: ffff80000db49158 x15: ffff00011b460000 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 000000000003f2a0 x10: ffff80001a60c000 x9 : 0d4b05a1f4d41e00 x8 : 0d4b05a1f4d41e00 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 get_signal+0xac8/0xb40 kernel/signal.c:2634 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: 1014 hardirqs last enabled at (1013): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (1013): [] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942 hardirqs last disabled at (1014): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (976): [] _stext+0x2e4/0x37c softirqs last disabled at (809): [] ____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: 1 PID: 2841 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 2841 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 2841 Comm: syz-executor.4 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #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 : ffff80002180bad0 x29: ffff80002180bad0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000ca75bd68 x25: 0000000000000000 x24: ffff0000c9c0d140 x23: ffff80000f06a090 x22: ffff80000d30c000 x21: ffff80000f0a5000 x20: ffff80000bfff5b8 x19: ffff00011611ce00 x18: 0000000000000137 x17: 0000000000000000 x16: ffff80000db49158 x15: ffff00011b460000 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 000000000003ffff x10: ffff80001a60c000 x9 : 0d4b05a1f4d41e00 x8 : 0d4b05a1f4d41e00 x7 : ffff800008161d1c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 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 get_signal+0xac8/0xb40 kernel/signal.c:2634 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: 1258 hardirqs last enabled at (1257): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (1257): [] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942 hardirqs last disabled at (1258): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (1220): [] _stext+0x2e4/0x37c softirqs last disabled at (1017): [] ____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: 2841 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 0 PID: 2841 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 0 PID: 2841 Comm: syz-executor.4 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #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 : ffff80002180bad0 x29: ffff80002180bad0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000ca75bd68 x25: 0000000000000000 x24: ffff0000c9c0d140 x23: ffff80000f06a090 x22: ffff80000d30c000 x21: ffff80000f0a5000 x20: ffff80000bfff5b8 x19: ffff00011611ce50 x18: 0000000000000137 x17: 203a657079742074 x16: ffff80000db49158 x15: ffff00011b460000 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 000000000003ffff x10: ffff80001a60c000 x9 : 0d4b05a1f4d41e00 x8 : 0d4b05a1f4d41e00 x7 : ffff80000819545c 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: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 get_signal+0xac8/0xb40 kernel/signal.c:2634 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: 1398 hardirqs last enabled at (1397): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:264 hardirqs last disabled at (1398): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (1352): [] _stext+0x2e4/0x37c softirqs last disabled at (1261): [] ____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: 1 PID: 2841 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 2841 at lib/debugobjects.c:505 debug_object_assert_init+0x144/0x198 lib/debugobjects.c:892 Modules linked in: CPU: 1 PID: 2841 Comm: syz-executor.4 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #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 : ffff80002180bac0 x29: ffff80002180bac0 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000ca75bd68 x25: 0000000000000000 x24: ffff0000c9c0d140 x23: ffff80000f06a090 x22: ffff80000d30c000 x21: ffff80000f0a5000 x20: ffff80000bfff5b8 x19: ffff00011611caf8 x18: 000000000000000c x17: 0000000000000000 x16: ffff80000db49158 x15: ffff00011b460000 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 000000000003ffff x10: ffff80001a60c000 x9 : 0d4b05a1f4d41e00 x8 : 0d4b05a1f4d41e00 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_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 get_signal+0xac8/0xb40 kernel/signal.c:2634 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: 1650 hardirqs last enabled at (1649): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (1649): [] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942 hardirqs last disabled at (1650): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (1598): [] spin_unlock_bh include/linux/spinlock.h:394 [inline] softirqs last enabled at (1598): [] nr_remove_socket net/netrom/af_netrom.c:95 [inline] softirqs last enabled at (1598): [] nr_destroy_socket+0xac/0x298 net/netrom/af_netrom.c:261 softirqs last disabled at (1596): [] spin_lock_bh include/linux/spinlock.h:354 [inline] softirqs last disabled at (1596): [] nr_remove_socket net/netrom/af_netrom.c:93 [inline] softirqs last disabled at (1596): [] nr_destroy_socket+0x28/0x298 net/netrom/af_netrom.c:261 ---[ end trace 0000000000000000 ]--- INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 0 PID: 2841 Comm: syz-executor.4 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x54 arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 assign_lock_key+0x134/0x140 kernel/locking/lockdep.c:979 register_lock_class+0xc4/0x2f8 kernel/locking/lockdep.c:1292 __lock_acquire+0xa8/0x30a4 kernel/locking/lockdep.c:4932 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162 skb_dequeue net/core/skbuff.c:3295 [inline] skb_queue_purge+0x28/0xc0 net/core/skbuff.c:3333 nr_clear_queues+0x20/0x48 net/netrom/nr_subr.c:35 nr_destroy_socket+0xdc/0x298 net/netrom/af_netrom.c:269 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 get_signal+0xac8/0xb40 kernel/signal.c:2634 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 Unable to handle kernel paging request at virtual address ffff80000d272a70 Mem abort info: ESR = 0x0000000096000047 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000047 CM = 0, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001c566b000 [ffff80000d272a70] pgd=100000023ffff003, p4d=100000023ffff003, pud=100000023fffe003, pmd=100000023fffa003, pte=0000000000000000 Internal error: Oops: 0000000096000047 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 2841 Comm: syz-executor.4 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x198/0x380 kernel/locking/qspinlock.c:474 lr : queued_spin_lock_slowpath+0x114/0x380 kernel/locking/qspinlock.c:405 sp : ffff80002180bb00 x29: ffff80002180bb00 x28: 00000000002e0003 x27: 0000000000000000 x26: ffff0000ca75bd68 x25: 0000000000000000 x24: ffff0001fefefa40 x23: 0000000000000000 x22: ffff80000d30cf28 x21: ffff80000d272a40 x20: 0000000000000001 x19: ffff00011611c898 x18: 000000000000002c x17: ffff80000bffd6bc x16: 0000000000000030 x15: 0000000000000001 x14: 0000000000000000 x13: 000000000000ffff x12: 0000000000000000 x11: ffff80000d272a70 x10: 0000000000080000 x9 : ffff0001fefefa48 x8 : ffff0001fefefa40 x7 : 0000000000000000 x6 : ffff80000b1bcdac x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000001 x1 : ffff80000ce26a9f x0 : 0000000000000001 Call trace: decode_tail kernel/locking/qspinlock.c:131 [inline] queued_spin_lock_slowpath+0x198/0x380 kernel/locking/qspinlock.c:471 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x10c/0x110 kernel/locking/spinlock_debug.c:115 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0x5c/0x6c kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:354 [inline] release_sock+0x2c/0x108 net/core/sock.c:3406 nr_release+0x194/0x274 net/netrom/af_netrom.c:553 __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 get_signal+0xac8/0xb40 kernel/signal.c:2634 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 Code: 8b2c4ecc f85f818c 1200056b 8b2b52ab (f82b6988) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 8b2c4ecc add x12, x22, w12, uxtw #3 4: f85f818c ldur x12, [x12, #-8] 8: 1200056b and w11, w11, #0x3 c: 8b2b52ab add x11, x21, w11, uxtw #4 * 10: f82b6988 str x8, [x12, x11] <-- trapping instruction