[linux-next:master] [mm] a132520496: WARNING:possible_recursive_locking_detected

[linux-next:master] [mm] a132520496: WARNING:possible_recursive_locking_detected

[kernel test robot]

Hello,

kernel test robot noticed "WARNING:possible_recursive_locking_detected" on:

commit: a13252049629a8225f38a9be7d8d4fc4ff5350e8 ("mm: fix mmap_assert_locked() in follow_pte()")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

[test failed on linux-next/master 3fe121b622825ff8cc995a1e6b026181c48188db]

in testcase: boot

compiler: clang-18
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)



If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202407141006.2957b01a-lkp@intel.com


[    5.151914][   T98] WARNING: possible recursive locking detected
[    5.152929][   T98] 6.10.0-rc6-00035-ga13252049629 #1 Tainted: G                T
[    5.154009][   T98] --------------------------------------------
[    5.154939][   T98] init/98 is trying to acquire lock:
[ 5.155818][ T98] c1012e30 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock (arch/x86/include/asm/jump_label.h:41 include/linux/jump_label.h:207 include/linux/mmap_lock.h:35 include/linux/mmap_lock.h:145) 
[    5.156939][   T98]
[    5.156939][   T98] but task is already holding lock:
[ 5.158380][ T98] c1012e30 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap (arch/x86/include/asm/jump_label.h:41 include/linux/jump_label.h:207 include/linux/mmap_lock.h:35 include/linux/mmap_lock.h:145 mm/mmap.c:3325) 
[    5.159430][   T98]
[    5.159430][   T98] other info that might help us debug this:
[    5.160863][   T98]  Possible unsafe locking scenario:
[    5.160863][   T98]
[    5.162163][   T98]        CPU0
[    5.162778][   T98]        ----
[    5.163406][   T98]   lock(&mm->mmap_lock);
[    5.164080][   T98]   lock(&mm->mmap_lock);
[    5.164854][   T98]
[    5.164854][   T98]  *** DEADLOCK ***
[    5.164854][   T98]
[    5.166540][   T98]  May be due to missing lock nesting notation
[    5.166540][   T98]
[    5.167828][   T98] 3 locks held by init/98:
[ 5.168575][ T98] #0: c31a9a80 (&sig->cred_guard_mutex){+.+.}-{3:3}, at: bprm_execve (fs/exec.c:?) 
[ 5.169659][ T98] #1: c31a9b4c (&sig->exec_update_lock){+.+.}-{3:3}, at: exec_mmap (fs/exec.c:1018) 
[ 5.170919][ T98] #2: c1012e30 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap (arch/x86/include/asm/jump_label.h:41 include/linux/jump_label.h:207 include/linux/mmap_lock.h:35 include/linux/mmap_lock.h:145 mm/mmap.c:3325) 
[    5.172091][   T98]
[    5.172091][   T98] stack backtrace:
[    5.173262][   T98] CPU: 0 PID: 98 Comm: init Tainted: G                T  6.10.0-rc6-00035-ga13252049629 #1
[    5.174372][   T98] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[    5.175533][   T98] Call Trace:
[ 5.176159][ T98] dump_stack_lvl (lib/dump_stack.c:? lib/dump_stack.c:114) 
[ 5.176864][ T98] dump_stack (lib/dump_stack.c:123) 
[ 5.177524][ T98] print_deadlock_bug (kernel/locking/lockdep.c:?) 
[ 5.178258][ T98] __lock_acquire (kernel/locking/lockdep.c:3062) 
[ 5.178967][ T98] ? lock_acquire (kernel/locking/lockdep.c:5754) 
[ 5.179663][ T98] ? __pte_offset_map_lock (include/linux/pgtable.h:324 include/linux/pgtable.h:588 mm/pgtable-generic.c:376) 
[ 5.180432][ T98] lock_acquire (kernel/locking/lockdep.c:5754) 
[ 5.181123][ T98] ? mmap_read_lock (arch/x86/include/asm/jump_label.h:41 include/linux/jump_label.h:207 include/linux/mmap_lock.h:35 include/linux/mmap_lock.h:145) 
[ 5.181839][ T98] down_read (kernel/locking/rwsem.c:1526) 
[ 5.182525][ T98] ? mmap_read_lock (arch/x86/include/asm/jump_label.h:41 include/linux/jump_label.h:207 include/linux/mmap_lock.h:35 include/linux/mmap_lock.h:145) 
[ 5.183238][ T98] mmap_read_lock (arch/x86/include/asm/jump_label.h:41 include/linux/jump_label.h:207 include/linux/mmap_lock.h:35 include/linux/mmap_lock.h:145) 
[ 5.183942][ T98] unmap_single_vma (mm/memory.c:1822) 
[ 5.184678][ T98] unmap_vmas (mm/memory.c:1892) 
[ 5.185343][ T98] exit_mmap (mm/mmap.c:3341) 
[ 5.186009][ T98] __mmput (kernel/fork.c:1413 kernel/fork.c:1348) 
[ 5.186658][ T98] mmput (kernel/fork.c:1369) 
[ 5.187291][ T98] exec_mmap (fs/exec.c:?) 
[ 5.187964][ T98] begin_new_exec (fs/exec.c:1330) 
[ 5.188669][ T98] load_elf_binary (fs/binfmt_elf.c:997) 
[ 5.189344][ T98] bprm_execve (fs/exec.c:1797 fs/exec.c:1839 fs/exec.c:1891) 
[ 5.189995][ T98] do_execveat_common (fs/exec.c:?) 
[ 5.190691][ T98] __ia32_sys_execve (fs/exec.c:2143) 
[ 5.191396][ T98] ia32_sys_call (arch/x86/entry/syscall_32.c:42) 
[ 5.192085][ T98] do_int80_syscall_32 (arch/x86/entry/common.c:?) 
[ 5.192780][ T98] ? exc_page_fault (arch/x86/mm/fault.c:1543) 
[ 5.193463][ T98] entry_INT80_32 (arch/x86/entry/entry_32.S:944) 
[    5.194144][   T98] EIP: 0xb7e67864
[ 5.194757][ T98] Code: Unable to access opcode bytes at 0xb7e6783a.

Code starting with the faulting instruction
===========================================
[    5.195610][   T98] EAX: ffffffda EBX: bfb3a2d4 ECX: bfb3a10c EDX: 0044a360
[    5.196520][   T98] ESI: bfb3a10c EDI: bfb3a2d4 EBP: bfb3a0a8 ESP: bfb3a048
[    5.197518][   T98] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 007b EFLAGS: 00000286
[    5.198575][    C0] vkms_vblank_simulate: vblank timer overrun



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240714/202407141006.2957b01a-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki