BUG: sleeping function called from invalid context at mm/memory.c:2007
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4652, name: dhcpcd-run-hook
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
2 locks held by dhcpcd-run-hook/4652:
 #0: ffff0000de25e178 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:592 [inline]
 #0: ffff0000de25e178 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x158/0xaf8 mm/mmap.c:1284
 #1: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:299
CPU: 0 UID: 0 PID: 4652 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 __might_resched+0x350/0x4ac kernel/sched/core.c:9162
 zap_pmd_range mm/memory.c:2007 [inline]
 zap_pud_range mm/memory.c:2032 [inline]
 zap_p4d_range mm/memory.c:2053 [inline]
 __zap_vma_range+0x3910/0x4040 mm/memory.c:2093
 unmap_vmas+0x254/0x3b8 mm/memory.c:2162
 exit_mmap+0x1e8/0xaf8 mm/mmap.c:1300
 __mmput+0xe4/0x2f0 kernel/fork.c:1178
 mmput+0x70/0xa8 kernel/fork.c:1201
 exit_mm+0x134/0x1e8 kernel/exit.c:581
 do_exit+0x518/0x1a6c kernel/exit.c:963
 do_group_exit+0x194/0x22c kernel/exit.c:1117
 __do_sys_exit_group kernel/exit.c:1128 [inline]
 __se_sys_exit_group kernel/exit.c:1126 [inline]
 pid_child_should_wake+0x0/0x110 kernel/exit.c:1126
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W          
-----------------------------
dhcpcd-run-hook/4652 is trying to lock:
ffff0000de25e178 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:536 [inline]
ffff0000de25e178 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x228/0xaf8 mm/mmap.c:1308
other info that might help us debug this:
context-{5:5}
1 lock held by dhcpcd-run-hook/4652:
 #0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:299
stack backtrace:
CPU: 0 UID: 0 PID: 4652 Comm: dhcpcd-run-hook Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4830 [inline]
 check_wait_context kernel/locking/lockdep.c:4902 [inline]
 __lock_acquire+0xabc/0x2f44 kernel/locking/lockdep.c:5187
 lock_acquire+0x140/0x368 kernel/locking/lockdep.c:5868
 down_write+0x50/0xc0 kernel/locking/rwsem.c:1625
 mmap_write_lock include/linux/mmap_lock.h:536 [inline]
 exit_mmap+0x228/0xaf8 mm/mmap.c:1308
 __mmput+0xe4/0x2f0 kernel/fork.c:1178
 mmput+0x70/0xa8 kernel/fork.c:1201
 exit_mm+0x134/0x1e8 kernel/exit.c:581
 do_exit+0x518/0x1a6c kernel/exit.c:963
 do_group_exit+0x194/0x22c kernel/exit.c:1117
 __do_sys_exit_group kernel/exit.c:1128 [inline]
 __se_sys_exit_group kernel/exit.c:1126 [inline]
 pid_child_should_wake+0x0/0x110 kernel/exit.c:1126
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594