=====================================
WARNING: bad unlock balance detected!
6.14.0-rc5-syzkaller-g77c95b8c7a16 #0 Not tainted
-------------------------------------
syz.0.55/6800 is trying to release lock (&mm->mmap_lock) at:
[<ffff800080a65e84>] mmap_read_unlock include/linux/mmap_lock.h:217 [inline]
[<ffff800080a65e84>] __mm_populate+0x328/0x3d8 mm/gup.c:2044
but there are no more locks to release!

other info that might help us debug this:
no locks held by syz.0.55/6800.

stack backtrace:
CPU: 1 UID: 0 PID: 6800 Comm: syz.0.55 Not tainted 6.14.0-rc5-syzkaller-g77c95b8c7a16 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_unlock_imbalance_bug+0x254/0x2ac kernel/locking/lockdep.c:5289
 __lock_release kernel/locking/lockdep.c:5518 [inline]
 lock_release+0x410/0x9e4 kernel/locking/lockdep.c:5872
 up_read+0x24/0x3c kernel/locking/rwsem.c:1619
 mmap_read_unlock include/linux/mmap_lock.h:217 [inline]
 __mm_populate+0x328/0x3d8 mm/gup.c:2044
 mm_populate include/linux/mm.h:3386 [inline]
 vm_mmap_pgoff+0x304/0x3c4 mm/util.c:580
 ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:607
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(tmp < 0): count = 0xffffffffffffff00, magic = 0xffff0000d642efe0, owner = 0x1, curr 0xffff0000d5328000, list empty
WARNING: CPU: 1 PID: 6800 at kernel/locking/rwsem.c:1346 __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1346
Modules linked in:
CPU: 1 UID: 0 PID: 6800 Comm: syz.0.55 Not tainted 6.14.0-rc5-syzkaller-g77c95b8c7a16 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1346
lr : __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1346
sp : ffff8000a50e79e0
x29: ffff8000a50e7a60 x28: 1ffff00011f780cb x27: ffff80008fbc0000
x26: dfff800000000000 x25: ffffffffffffff00 x24: ffff0000d642f038
x23: ffff0000d642efe0 x22: ffffffffffffff00 x21: 0000000000000001
x20: ffff0000d5328000 x19: ffff0000d642efe0 x18: ffff8000a50e72a8
x17: 0000000000000000 x16: ffff8000832b8f3c x15: 0000000000000001
x14: 1ffff00014a1ce94 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 0000000000010f89 x9 : 956c78810c1fe100
x8 : 956c78810c1fe100 x7 : 205b5d3931393633 x6 : ffff8000804aa818
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008324af54
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1346 (P)
 up_read+0x2c/0x3c kernel/locking/rwsem.c:1620
 mmap_read_unlock include/linux/mmap_lock.h:217 [inline]
 __mm_populate+0x328/0x3d8 mm/gup.c:2044
 mm_populate include/linux/mm.h:3386 [inline]
 vm_mmap_pgoff+0x304/0x3c4 mm/util.c:580
 ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:607
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
irq event stamp: 83759
hardirqs last  enabled at (83759): [<ffff80008b7ec538>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (83759): [<ffff80008b7ec538>] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194
hardirqs last disabled at (83758): [<ffff80008b7ec368>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (83758): [<ffff80008b7ec368>] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162
softirqs last  enabled at (83566): [<ffff8000801283e0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (83564): [<ffff8000801283ac>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---