================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x2eff/0x3640 kernel/locking/lockdep.c:3224 at addr ffff8801cc49e838 Read of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Not tainted 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154f8b0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d07 ffff8801cc49e838 ffff8801d154f8d8 ffffffff8153a32c ffffed0039893d07 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:330 [inline] [] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330 [] __lock_acquire+0x2eff/0x3640 kernel/locking/lockdep.c:3224 [] lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline] [] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159 [] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x2c56/0x3640 kernel/locking/lockdep.c:3228 at addr ffff8801cc49e840 Read of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154f8b0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d08 ffff8801cc49e840 ffff8801d154f8d8 ffffffff8153a32c ffffed0039893d08 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:330 [inline] [] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330 [] __lock_acquire+0x2c56/0x3640 kernel/locking/lockdep.c:3228 [] lock_acquire+0x12e/0x410 kernel/locking/lockdep.c:3756 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline] [] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159 [] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] at addr ffff8801cc49e824 BUG: KASAN: use-after-free in do_raw_spin_lock+0x1ac/0x1e0 kernel/locking/spinlock_debug.c:112 at addr ffff8801cc49e824 Read of size 4 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fac0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d04 ffff8801cc49e824 ffff8801d154fae8 ffffffff8153a32c ffffed0039893d04 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:329 [inline] [] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:329 [] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] [] do_raw_spin_lock+0x1ac/0x1e0 kernel/locking/spinlock_debug.c:112 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] [] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159 [] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:84 [inline] at addr ffff8801cc49e830 BUG: KASAN: use-after-free in do_raw_spin_lock+0x1d3/0x1e0 kernel/locking/spinlock_debug.c:112 at addr ffff8801cc49e830 Read of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fac0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d06 ffff8801cc49e830 ffff8801d154fae8 ffffffff8153a32c ffffed0039893d06 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:330 [inline] [] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330 [] debug_spin_lock_before kernel/locking/spinlock_debug.c:84 [inline] [] do_raw_spin_lock+0x1d3/0x1e0 kernel/locking/spinlock_debug.c:112 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] [] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159 [] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline] at addr ffff8801cc49e828 BUG: KASAN: use-after-free in do_raw_spin_lock+0x1a2/0x1e0 kernel/locking/spinlock_debug.c:112 at addr ffff8801cc49e828 Read of size 4 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fac0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d05 ffff8801cc49e828 ffff8801d154fae8 ffffffff8153a32c ffffed0039893d05 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:329 [inline] [] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:329 [] debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline] [] do_raw_spin_lock+0x1a2/0x1e0 kernel/locking/spinlock_debug.c:112 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] [] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159 [] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_lock_after kernel/locking/spinlock_debug.c:91 [inline] at addr ffff8801cc49e828 BUG: KASAN: use-after-free in do_raw_spin_lock+0x1b9/0x1e0 kernel/locking/spinlock_debug.c:114 at addr ffff8801cc49e828 Write of size 4 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fac0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d05 ffff8801cc49e828 ffff8801d154fae8 ffffffff8153a32c ffffed0039893d05 ffff8801da001280 0000000000000001 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:334 [inline] [] __asan_report_store4_noabort+0x2c/0x30 mm/kasan/report.c:334 [] debug_spin_lock_after kernel/locking/spinlock_debug.c:91 [inline] [] do_raw_spin_lock+0x1b9/0x1e0 kernel/locking/spinlock_debug.c:114 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] [] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159 [] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_lock_after kernel/locking/spinlock_debug.c:92 [inline] at addr ffff8801cc49e830 BUG: KASAN: use-after-free in do_raw_spin_lock+0x1c6/0x1e0 kernel/locking/spinlock_debug.c:114 at addr ffff8801cc49e830 Write of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fac0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d06 ffff8801cc49e830 ffff8801d154fae8 ffffffff8153a32c ffffed0039893d06 ffff8801da001280 0000000000000001 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:335 [inline] [] __asan_report_store8_noabort+0x2c/0x30 mm/kasan/report.c:335 [] debug_spin_lock_after kernel/locking/spinlock_debug.c:92 [inline] [] do_raw_spin_lock+0x1c6/0x1e0 kernel/locking/spinlock_debug.c:114 [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] [] _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:159 [] remove_wait_queue+0x14/0x40 kernel/sched/wait.c:49 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in __list_del_entry+0x184/0x1d0 lib/list_debug.c:57 at addr ffff8801cc49e858 Read of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad8 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d0b ffff8801cc49e858 ffff8801d154fb00 ffffffff8153a32c ffffed0039893d0b ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:330 [inline] [] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330 [] __list_del_entry+0x184/0x1d0 lib/list_debug.c:57 [] list_del+0xd/0x70 lib/list_debug.c:77 [] __remove_wait_queue include/linux/wait.h:196 [inline] [] remove_wait_queue+0x20/0x40 kernel/sched/wait.c:50 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in __list_del_entry+0x196/0x1d0 lib/list_debug.c:60 at addr ffff8801cc49e860 Read of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad8 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d0c ffff8801cc49e860 ffff8801d154fb00 ffffffff8153a32c ffffed0039893d0c ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:330 [inline] [] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330 [] __list_del_entry+0x196/0x1d0 lib/list_debug.c:60 [] list_del+0xd/0x70 lib/list_debug.c:77 [] __remove_wait_queue include/linux/wait.h:196 [inline] [] remove_wait_queue+0x20/0x40 kernel/sched/wait.c:50 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in __write_once_size include/linux/compiler.h:272 [inline] at addr ffff8801cc49e858 BUG: KASAN: use-after-free in __list_del include/linux/list.h:90 [inline] at addr ffff8801cc49e858 BUG: KASAN: use-after-free in __list_del_entry+0x173/0x1d0 lib/list_debug.c:65 at addr ffff8801cc49e858 Write of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad8 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d0b ffff8801cc49e858 ffff8801d154fb00 ffffffff8153a32c ffffed0039893d0b ffff8801da001280 0000000000000001 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:335 [inline] [] __asan_report_store8_noabort+0x2c/0x30 mm/kasan/report.c:335 [] __write_once_size include/linux/compiler.h:272 [inline] [] __list_del include/linux/list.h:90 [inline] [] __list_del_entry+0x173/0x1d0 lib/list_debug.c:65 [] list_del+0xd/0x70 lib/list_debug.c:77 [] __remove_wait_queue include/linux/wait.h:196 [inline] [] remove_wait_queue+0x20/0x40 kernel/sched/wait.c:50 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:97 [inline] at addr ffff8801cc49e824 BUG: KASAN: use-after-free in do_raw_spin_unlock+0x1d4/0x210 kernel/locking/spinlock_debug.c:134 at addr ffff8801cc49e824 Read of size 4 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d04 ffff8801cc49e824 ffff8801d154faf8 ffffffff8153a32c ffffed0039893d04 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:329 [inline] [] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:329 [] debug_spin_unlock kernel/locking/spinlock_debug.c:97 [inline] [] do_raw_spin_unlock+0x1d4/0x210 kernel/locking/spinlock_debug.c:134 [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] [] _raw_spin_unlock_irqrestore+0x27/0x70 kernel/locking/spinlock.c:191 [] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline] [] remove_wait_queue+0x2b/0x40 kernel/sched/wait.c:51 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:243 [inline] at addr ffff8801cc49e820 BUG: KASAN: use-after-free in atomic_read arch/x86/include/asm/atomic.h:26 [inline] at addr ffff8801cc49e820 BUG: KASAN: use-after-free in queued_spin_is_locked include/asm-generic/qspinlock.h:49 [inline] at addr ffff8801cc49e820 BUG: KASAN: use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:98 [inline] at addr ffff8801cc49e820 BUG: KASAN: use-after-free in do_raw_spin_unlock+0x1ca/0x210 kernel/locking/spinlock_debug.c:134 at addr ffff8801cc49e820 Read of size 4 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d04 ffff8801cc49e820 ffff8801d154faf8 ffffffff8153a32c ffffed0039893d04 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:329 [inline] [] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:329 [] __read_once_size include/linux/compiler.h:243 [inline] [] atomic_read arch/x86/include/asm/atomic.h:26 [inline] [] queued_spin_is_locked include/asm-generic/qspinlock.h:49 [inline] [] debug_spin_unlock kernel/locking/spinlock_debug.c:98 [inline] [] do_raw_spin_unlock+0x1ca/0x210 kernel/locking/spinlock_debug.c:134 [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] [] _raw_spin_unlock_irqrestore+0x27/0x70 kernel/locking/spinlock.c:191 [] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline] [] remove_wait_queue+0x2b/0x40 kernel/sched/wait.c:51 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline] at addr ffff8801cc49e830 BUG: KASAN: use-after-free in do_raw_spin_unlock+0x1fb/0x210 kernel/locking/spinlock_debug.c:134 at addr ffff8801cc49e830 Read of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d06 ffff8801cc49e830 ffff8801d154faf8 ffffffff8153a32c ffffed0039893d06 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:330 [inline] [] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330 [] debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline] [] do_raw_spin_unlock+0x1fb/0x210 kernel/locking/spinlock_debug.c:134 [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] [] _raw_spin_unlock_irqrestore+0x27/0x70 kernel/locking/spinlock.c:191 [] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline] [] remove_wait_queue+0x2b/0x40 kernel/sched/wait.c:51 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline] at addr ffff8801cc49e828 BUG: KASAN: use-after-free in do_raw_spin_unlock+0x1e1/0x210 kernel/locking/spinlock_debug.c:134 at addr ffff8801cc49e828 Read of size 4 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d05 ffff8801cc49e828 ffff8801d154faf8 ffffffff8153a32c ffffed0039893d05 ffff8801da001280 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:329 [inline] [] __asan_report_load4_noabort+0x29/0x30 mm/kasan/report.c:329 [] debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline] [] do_raw_spin_unlock+0x1e1/0x210 kernel/locking/spinlock_debug.c:134 [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] [] _raw_spin_unlock_irqrestore+0x27/0x70 kernel/locking/spinlock.c:191 [] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline] [] remove_wait_queue+0x2b/0x40 kernel/sched/wait.c:51 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:102 [inline] at addr ffff8801cc49e830 BUG: KASAN: use-after-free in do_raw_spin_unlock+0x208/0x210 kernel/locking/spinlock_debug.c:134 at addr ffff8801cc49e830 Write of size 8 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d06 ffff8801cc49e830 ffff8801d154faf8 ffffffff8153a32c ffffed0039893d06 ffff8801da001280 0000000000000001 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [] print_address_description mm/kasan/report.c:198 [inline] [] kasan_report_error mm/kasan/report.c:287 [inline] [] kasan_report.part.1+0x21c/0x500 mm/kasan/report.c:309 [] kasan_report mm/kasan/report.c:335 [inline] [] __asan_report_store8_noabort+0x2c/0x30 mm/kasan/report.c:335 [] debug_spin_unlock kernel/locking/spinlock_debug.c:102 [inline] [] do_raw_spin_unlock+0x208/0x210 kernel/locking/spinlock_debug.c:134 [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] [] _raw_spin_unlock_irqrestore+0x27/0x70 kernel/locking/spinlock.c:191 [] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline] [] remove_wait_queue+0x2b/0x40 kernel/sched/wait.c:51 [] ep_remove_wait_queue fs/eventpoll.c:535 [inline] [] ep_unregister_pollwait.isra.6+0xaf/0x240 fs/eventpoll.c:553 [] ep_free+0x96/0x1b0 fs/eventpoll.c:770 [] ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:802 [] __fput+0x28c/0x6e0 fs/file_table.c:208 [] ____fput+0x15/0x20 fs/file_table.c:244 [] task_work_run+0x115/0x190 kernel/task_work.c:116 [] exit_task_work include/linux/task_work.h:21 [inline] [] do_exit+0x7e7/0x2a40 kernel/exit.c:833 [] do_group_exit+0x108/0x320 kernel/exit.c:937 [] SYSC_exit_group kernel/exit.c:948 [inline] [] SyS_exit_group+0x1d/0x20 kernel/exit.c:946 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Object at ffff8801cc49e780, in cache kmalloc-512 size: 512 Allocated: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598 kmem_cache_alloc_trace+0xfb/0x2a0 mm/slub.c:2742 kmalloc include/linux/slab.h:490 [inline] kzalloc include/linux/slab.h:636 [inline] binder_get_thread+0x15d/0x750 drivers/android/binder.c:4454 binder_poll+0x4a/0x210 drivers/android/binder.c:4557 ep_item_poll fs/eventpoll.c:811 [inline] ep_insert fs/eventpoll.c:1347 [inline] SYSC_epoll_ctl fs/eventpoll.c:1975 [inline] SyS_epoll_ctl+0x11d7/0x2190 fs/eventpoll.c:1861 entry_SYSCALL_64_fastpath+0x23/0xc6 Freed: PID = 3283 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:495 set_track mm/kasan/kasan.c:507 [inline] kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xf0/0x2f0 mm/slub.c:3878 binder_free_thread drivers/android/binder.c:4482 [inline] binder_thread_dec_tmpref+0x1cc/0x240 drivers/android/binder.c:2038 binder_thread_release+0x27d/0x540 drivers/android/binder.c:4546 binder_ioctl+0x9c0/0x11b0 drivers/android/binder.c:4762 vfs_ioctl fs/ioctl.c:43 [inline] do_vfs_ioctl+0x1aa/0x1140 fs/ioctl.c:679 SYSC_ioctl fs/ioctl.c:694 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 entry_SYSCALL_64_fastpath+0x23/0xc6 Memory state around the buggy address: ffff8801cc49e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cc49e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cc49e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cc49e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cc49e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ================================================================== BUG: KASAN: use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:103 [inline] at addr ffff8801cc49e828 BUG: KASAN: use-after-free in do_raw_spin_unlock+0x1ee/0x210 kernel/locking/spinlock_debug.c:134 at addr ffff8801cc49e828 Write of size 4 by task syzkaller947561/3283 CPU: 1 PID: 3283 Comm: syzkaller947561 Tainted: G B 4.9.66-gb763480 #103 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d154fad0 ffffffff81d90749 ffff8801da001280 ffff8801cc49e780 ffff8801cc49e980 ffffed0039893d05 ffff8801cc49e828 ffff8801d154faf8 ffffffff8153a32c ffffed0039893d05 ffff8801da001280 0000000000000001 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160 [