INFO: task syz.3.721:8988 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc2-next-20241011-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.721       state:D stack:22704 pid:8988  tgid:8981  ppid:8502   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
 mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
 __mmput+0x115/0x390 kernel/fork.c:1346
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9b2/0x28e0 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 get_signal+0x16a3/0x1740 kernel/signal.c:2917
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc40717dff9
RSP: 002b:00007fc407ee8038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000001800 RBX: 00007fc407336058 RCX: 00007fc40717dff9
RDX: 0000000000001800 RSI: 0000000020001dc0 RDI: 0000000000000005
RBP: 00007fc4071f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000002002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc407336058 R15: 00007ffd602ffdf8
 </TASK>
INFO: task syz.1.725:8994 blocked for more than 145 seconds.
      Not tainted 6.12.0-rc2-next-20241011-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.725       state:D stack:26032 pid:8994  tgid:8993  ppid:8444   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
 mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
 __mmput+0x115/0x390 kernel/fork.c:1346
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9b2/0x28e0 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 get_signal+0x16a3/0x1740 kernel/signal.c:2917
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c1c97dff9
RSP: 002b:00007f9c1d7aa0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f9c1cb35f88 RCX: 00007f9c1c97dff9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9c1cb35f88
RBP: 00007f9c1cb35f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9c1cb35f8c
R13: 0000000000000000 R14: 00007ffcfa690310 R15: 00007ffcfa6903f8
 </TASK>
INFO: task syz.4.730:9007 blocked for more than 148 seconds.
      Not tainted 6.12.0-rc2-next-20241011-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.730       state:D stack:23840 pid:9007  tgid:9007  ppid:8485   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
 mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
 __mmput+0x115/0x390 kernel/fork.c:1346
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9b2/0x28e0 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1fba37dff9
RSP: 002b:00007ffe17d58958 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1fba37dff9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe17d589ac R08: 00007ffe17d58a3f R09: 0000000000072be1
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000032
R13: 0000000000072be1 R14: 0000000000072b6a R15: 00007ffe17d58a00
 </TASK>
INFO: task syz.2.731:9009 blocked for more than 149 seconds.
      Not tainted 6.12.0-rc2-next-20241011-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.731       state:D stack:23840 pid:9009  tgid:9009  ppid:8627   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
 __down_write_common kernel/locking/rwsem.c:1304 [inline]
 __down_write kernel/locking/rwsem.c:1313 [inline]
 down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
 mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
 __mmput+0x115/0x390 kernel/fork.c:1346
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9b2/0x28e0 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4cbd57dff9
RSP: 002b:00007fffbf683978 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4cbd57dff9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffbf6839cc R08: 00007fffbf683a5f R09: 0000000000072d11
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000032
R13: 0000000000072d11 R14: 0000000000072c65 R15: 00007fffbf683a20
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by kworker/u8:2/35:
4 locks held by dhcpcd/4907:
2 locks held by getty/4996:
 #0: ffff8880321400a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/u8:13/8402:
1 lock held by syz-executor/8444:
 #0: ffff88807dcd3a98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 #0: ffff88807dcd3a98 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
1 lock held by syz-executor/8485:
 #0: ffff88807db63118 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 #0: ffff88807db63118 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
1 lock held by syz-executor/8502:
 #0: ffff88807a7c9e18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 #0: ffff88807a7c9e18 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
1 lock held by syz-executor/8627:
 #0: ffff88807dcd7398 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 #0: ffff88807dcd7398 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
1 lock held by syz.3.721/8988:
 #0: ffff888024a22798 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 #0: ffff888024a22798 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
1 lock held by syz.1.725/8994:
 #0: ffff888024a20b18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 #0: ffff888024a20b18 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
1 lock held by syz.4.730/9007:
 #0: ffff88807da66098 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 #0: ffff88807da66098 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
1 lock held by syz.2.731/9009:
 #0: ffff88807da60198 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:106 [inline]
 #0: ffff88807da60198 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x2bd/0xc40 mm/mmap.c:1925
1 lock held by syz-executor/9055:

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-next-20241011-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xff4/0x1040 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9055 Comm: syz-executor Not tainted 6.12.0-rc2-next-20241011-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:unwind_next_frame+0x2215/0x22d0 arch/x86/kernel/unwind_orc.c:648
Code: e9 4d f5 ff ff 89 d9 80 e1 07 38 c1 0f 8c 72 f5 ff ff 49 89 d6 be 02 00 00 00 48 89 df e8 53 30 bd 00 4c 89 f2 e9 5a f5 ff ff <89> d1 80 e1 07 38 c1 0f 8c 60 f5 ff ff 48 89 d7 be 02 00 00 00 e8
RSP: 0018:ffffc900047b74d0 EFLAGS: 00000006
RAX: 0000000000000006 RBX: ffffffff8c084dc2 RCX: 000000008c084d02
RDX: ffffffff8c084dc3 RSI: 0000000000000001 RDI: ffffc900047b7600
RBP: dffffc0000000000 R08: ffffc900047b75ff R09: 0000000000000000
R10: ffffc900047b75f0 R11: fffff520008f6ec0 R12: ffffc900047b8000
R13: ffffc900047b75a0 R14: ffffffff81a0cbdc R15: ffffc900047b75f0
FS:  00005555934bd500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f57b28ea040 CR3: 0000000055df4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4273 [inline]
 __kmalloc_node_noprof+0x290/0x4d0 mm/slub.c:4279
 kmalloc_array_node_noprof include/linux/slab.h:996 [inline]
 alloc_slab_obj_exts mm/slub.c:1955 [inline]
 account_slab mm/slub.c:2528 [inline]
 allocate_slab+0xb6/0x2f0 mm/slub.c:2583
 new_slab mm/slub.c:2618 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3805
 __slab_alloc+0x58/0xa0 mm/slub.c:3895
 __slab_alloc_node mm/slub.c:3970 [inline]
 slab_alloc_node mm/slub.c:4131 [inline]
 kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4150
 __sigqueue_alloc+0x42e/0x540 kernel/signal.c:428
 __send_signal_locked+0x22f/0xdc0 kernel/signal.c:1117
 do_send_sig_info kernel/signal.c:1299 [inline]
 group_send_sig_info+0x292/0x310 kernel/signal.c:1449
 bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:857
 ____bpf_send_signal kernel/trace/bpf_trace.c:862 [inline]
 bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:860
 bpf_prog_7ba5217f62dcd359+0x41/0x45
 bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2318 [inline]
 bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2359
 trace_sys_enter+0x93/0xd0 include/trace/events/syscalls.h:18
 syscall_trace_enter+0xf8/0x150 kernel/entry/common.c:61
 syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
 syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
 do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffbe8b19959
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007ffeed06ed00 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007ffbe9864620 RCX: 00007ffbe8b19959
RDX: 00007ffeed06ed00 RSI: 00007ffeed06ee30 RDI: 0000000000000011
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007ffeed06f35c R14: 00007ffbe9864670 R15: 0000000000000000
 </TASK>