INFO: task syz-executor:6313 blocked for more than 143 seconds. Not tainted syzkaller #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21688 pid:6313 tgid:6313 ppid:1 task_flags:0x40054c flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1794/0x4c40 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0x161/0x360 kernel/sched/core.c:7058 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7115 rwsem_down_write_slowpath+0x922/0x10d0 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591 mmap_write_lock include/linux/mmap_lock.h:397 [inline] exit_mmap+0x28a/0xb10 mm/mmap.c:1288 __mmput+0x118/0x430 kernel/fork.c:1129 exit_mm+0x1d6/0x2b0 kernel/exit.c:582 do_exit+0x644/0x22f0 kernel/exit.c:949 do_group_exit+0x218/0x2d0 kernel/exit.c:1102 get_signal+0x125a/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x96/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x71/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x213/0x2e0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fd047385017 RSP: 002b:00007ffc1a8c3f50 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 0000000000000005 RCX: 00007fd047385017 RDX: 0000000040000000 RSI: 00007ffc1a8c3fbc RDI: 00000000ffffffff RBP: 00007ffc1a8c3fbc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 000055556ec46590 R14: 0000000000025249 R15: 00007ffc1a8c4010 INFO: task syz-executor:6313 is blocked on an rw-semaphore, but the owner is not found. INFO: task syz-executor:6317 blocked for more than 143 seconds. Not tainted syzkaller #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21656 pid:6317 tgid:6317 ppid:1 task_flags:0x40054c flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1794/0x4c40 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0x161/0x360 kernel/sched/core.c:7058 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7115 rwsem_down_write_slowpath+0x922/0x10d0 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591 mmap_write_lock include/linux/mmap_lock.h:397 [inline] exit_mmap+0x28a/0xb10 mm/mmap.c:1288 __mmput+0x118/0x430 kernel/fork.c:1129 exit_mm+0x1d6/0x2b0 kernel/exit.c:582 do_exit+0x644/0x22f0 kernel/exit.c:949 do_group_exit+0x218/0x2d0 kernel/exit.c:1102 get_signal+0x125a/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x96/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x71/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x213/0x2e0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f1801d85613 RSP: 002b:00007ffef1ac3f08 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 00007f1801d85613 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 000055556dad37d0 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000000927c0 R14: 0000000000025218 R15: 00007ffef1ac40a0 INFO: task syz-executor:6317 is blocked on an rw-semaphore, but the owner is not found. INFO: task syz-executor:6320 blocked for more than 144 seconds. Not tainted syzkaller #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20520 pid:6320 tgid:6320 ppid:1 task_flags:0x40054c flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1794/0x4c40 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0x161/0x360 kernel/sched/core.c:7058 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7115 rwsem_down_write_slowpath+0x922/0x10d0 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591 mmap_write_lock include/linux/mmap_lock.h:397 [inline] exit_mmap+0x28a/0xb10 mm/mmap.c:1288 __mmput+0x118/0x430 kernel/fork.c:1129 exit_mm+0x1d6/0x2b0 kernel/exit.c:582 do_exit+0x644/0x22f0 kernel/exit.c:949 do_group_exit+0x218/0x2d0 kernel/exit.c:1102 get_signal+0x125a/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x96/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x71/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x213/0x2e0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fd75b985613 RSP: 002b:00007ffec8f3f608 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 00007fd75b985613 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 00005555844da7d0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd75bbb1280 R14: 0000000000000003 R15: 00007ffec8f3f7a0 INFO: task syz-executor:6320 is blocked on an rw-semaphore, but the owner is not found. INFO: task syz.0.22:6514 blocked for more than 144 seconds. Not tainted syzkaller #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.22 state:D stack:25736 pid:6514 tgid:6511 ppid:6313 task_flags:0x40054c flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1794/0x4c40 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0x161/0x360 kernel/sched/core.c:7058 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7115 rwsem_down_write_slowpath+0x922/0x10d0 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591 mmap_write_lock include/linux/mmap_lock.h:397 [inline] exit_mmap+0x28a/0xb10 mm/mmap.c:1288 __mmput+0x118/0x430 kernel/fork.c:1129 exit_mm+0x1d6/0x2b0 kernel/exit.c:582 do_exit+0x644/0x22f0 kernel/exit.c:949 do_group_exit+0x218/0x2d0 kernel/exit.c:1102 get_signal+0x125a/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x96/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x71/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x213/0x2e0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fd04738eec9 RSP: 002b:00007fd04817d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fd0475e5fa8 RCX: 00007fd04738eec9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd0475e5fa8 RBP: 00007fd0475e5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd0475e6038 R14: 00007ffc1a8c3b10 R15: 00007ffc1a8c3bf8 INFO: task syz.0.22:6514 is blocked on an rw-semaphore, but the owner is not found. Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8db39660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8db39660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8db39660 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x180 kernel/locking/lockdep.c:6775 2 locks held by kworker/u8:4/78: #0: ffff888019c89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888019c89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b0/0x1780 kernel/workqueue.c:3319 #1: ffffc9000211fba0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc9000211fba0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9eb/0x1780 kernel/workqueue.c:3319 2 locks held by kworker/u8:9/3459: 2 locks held by kworker/u8:10/3490: #0: ffff888019c89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888019c89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b0/0x1780 kernel/workqueue.c:3319 #1: ffffc9000b9a7ba0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc9000b9a7ba0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9eb/0x1780 kernel/workqueue.c:3319 2 locks held by udevd/5170: #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1484 [inline] #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1537 #1: ffff8880593ced60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #1: ffff8880593ced60 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x12a/0x1a90 mm/mmap.c:1727 2 locks held by getty/5560: #0: ffff88814db690a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900036bb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43a/0x1400 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6313: #0: ffff88801c3dc260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88801c3dc260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/6316: #0: ffff8880793de2a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880793de2a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/6317: #0: ffff88807b05e2a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807b05e2a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/6320: #0: ffff88807b059760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807b059760 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by modprobe/6510: #0: ffff8880289c6d60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #0: ffff8880289c6d60 (&mm->mmap_lock){++++}-{4:4}, at: do_mprotect_pkey+0x213/0xcc0 mm/mprotect.c:892 1 lock held by syz.0.22/6514: #0: ffff88802f431760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88802f431760 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by rm/6512: #0: ffff8880289c4d20 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #0: ffff8880289c4d20 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x20d/0x4c0 mm/util.c:578 1 lock held by syz-executor/7472: #0: ffff88807b8a2220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807b8a2220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/7481: #0: ffff88807d6937a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807d6937a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/7518: #0: ffff8880237f4260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880237f4260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.5.592/7728: #0: ffff88805a8f2ce0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88805a8f2ce0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.1.593/7731: #0: ffff8880280862a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880280862a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/8537: #0: ffff888077508ca0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888077508ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by udevd/8539: #0: ffff88807750b7a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #0: ffff88807750b7a0 (&mm->mmap_lock){++++}-{4:4}, at: __vm_munmap+0x158/0x3c0 mm/vma.c:3152 1 lock held by syz-executor/8542: #0: ffff88807750ed60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807750ed60 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/8557: #0: ffff88807750ace0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807750ace0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.9.1121/8861: #0: ffff88805a8f6d60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88805a8f6d60 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.8.1122/8863: #0: ffff88805a8f2220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88805a8f2220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.0.1123/8865: #0: ffff888058aa37a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888058aa37a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/8867: #0: ffff888058aa4260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888058aa4260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/9416: #0: ffff88801dac2ce0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88801dac2ce0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/9422: #0: ffff88805ba48ca0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88805ba48ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/9424: #0: ffff8880217ca220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880217ca220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/9429: #0: ffff88805ba49760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88805ba49760 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.2.1385/9791: #0: ffff8880237f62a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880237f62a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.4.1537/9792: #0: ffff8880237f6d60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880237f6d60 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/10488: #0: ffff8880593c8ca0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880593c8ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/10491: #0: ffff8880593cd7e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880593cd7e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/10528: #0: ffff88807c70e2a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807c70e2a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.3.2022/10854: #0: ffff888079e74260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888079e74260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by modprobe/10856: #0: ffff8880237f01e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #0: ffff8880237f01e0 (&mm->mmap_lock){++++}-{4:4}, at: setup_arg_pages+0x2af/0xa80 fs/exec.c:650 1 lock held by syz-executor/10862: #0: ffff888019c72220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888019c72220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/10863: #0: ffff888019c737a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888019c737a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz-executor/10865: #0: ffff8880237f0ca0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880237f0ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 1 lock held by syz.1.2028/10967: #0: ffff8880217ccd20 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880217ccd20 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 2 locks held by syz-executor/11563: #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1484 [inline] #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1537 #1: ffff88807b8a4260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #1: ffff88807b8a4260 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x12a/0x1a90 mm/mmap.c:1727 2 locks held by syz-executor/11568: #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1484 [inline] #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1537 #1: ffff8880235c8ca0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #1: ffff8880235c8ca0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x12a/0x1a90 mm/mmap.c:1727 2 locks held by syz-executor/11573: #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1484 [inline] #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1537 #1: ffff88807b8a01e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #1: ffff88807b8a01e0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x12a/0x1a90 mm/mmap.c:1727 2 locks held by syz-executor/11722: #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1484 [inline] #0: ffffffff8dbf08d0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1537 #1: ffff88805a8f01e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #1: ffff88805a8f01e0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x12a/0x1a90 mm/mmap.c:1727 1 lock held by syz.4.2506/11988: #0: ffff88802f434d20 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88802f434d20 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28a/0xb10 mm/mmap.c:1288 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x185/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39a/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x176/0x2e0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline] watchdog+0x15a7/0x15f0 kernel/hung_task.c:491 kthread+0x70a/0x890 kernel/kthread.c:463 ret_from_fork+0x431/0x7a0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:pv_native_safe_halt+0xb/0x20 arch/x86/kernel/paravirt.c:82 Code: f8 42 02 e9 47 e7 02 00 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 90 0f 00 2d 47 0f 1b 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6 RAX: 331e84728157bb00 RBX: ffffffff81950814 RCX: 331e84728157bb00 RDX: 0000000000000001 RSI: ffffffff8d2e089d RDI: ffffffff8b7e7480 RBP: ffffc90000197f20 R08: ffff8880b8932f9b R09: 1ffff110171265f3 R10: dffffc0000000000 R11: ffffed10171265f4 R12: ffffffff8f35e270 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110038d3b40 FS: 0000000000000000(0000) GS:ffff88812679b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055559454b5c8 CR3: 000000000d936000 CR4: 00000000003526f0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0xf/0x20 arch/x86/kernel/process.c:757 default_idle_call+0x6e/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0x1e4/0x510 kernel/sched/idle.c:330 cpu_startup_entry+0x40/0x60 kernel/sched/idle.c:428 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315 common_startup_64+0x13e/0x147