udevd[4452]: starting eudev-3.2.11
=============================
WARNING: suspicious RCU usage
6.4.0-syzkaller-10173-ga901a3568fd2 #0 Not tainted
-----------------------------
lib/maple_tree.c:860 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
no locks held by udevd/4452.

stack backtrace:
CPU: 0 PID: 4452 Comm: udevd Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106
 lockdep_rcu_suspicious+0x208/0x3a0 kernel/locking/lockdep.c:6719
 mas_root lib/maple_tree.c:860 [inline]
 mas_root lib/maple_tree.c:858 [inline]
 mas_start lib/maple_tree.c:1402 [inline]
 mas_start lib/maple_tree.c:1392 [inline]
 mas_state_walk lib/maple_tree.c:3861 [inline]
 mas_walk+0x4e8/0x7c0 lib/maple_tree.c:4980
 mas_find_setup lib/maple_tree.c:5924 [inline]
 mas_find+0x1cb/0x340 lib/maple_tree.c:5965
 vma_next include/linux/mm.h:865 [inline]
 validate_mm+0xd2/0x470 mm/mmap.c:301
 do_vmi_align_munmap+0x1199/0x1680 mm/mmap.c:2561
 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619
 __vm_munmap+0x137/0x380 mm/mmap.c:2899
 __do_sys_munmap mm/mmap.c:2916 [inline]
 __se_sys_munmap mm/mmap.c:2913 [inline]
 __x64_sys_munmap+0x62/0x80 mm/mmap.c:2913
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f71bd71d817
Code: ff ff 76 10 48 8b 15 10 36 0d 00 f7 d8 64 89 02 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 35 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffff4d4c838 EFLAGS: 00000206 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000055abef1135b0 RCX: 00007f71bd71d817
RDX: 000000055abef168 RSI: 0000000000906623 RDI: 00007f71bcc00000
RBP: 000055abef167000 R08: 0000000000000007 R09: e850bab6b4ae6ccd
R10: 00007ffff4d7f090 R11: 0000000000000206 R12: 000055abef1135e8
R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

=============================
WARNING: suspicious RCU usage
6.4.0-syzkaller-10173-ga901a3568fd2 #0 Not tainted
-----------------------------
lib/maple_tree.c:816 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
no locks held by udevd/4452.

stack backtrace:
CPU: 0 PID: 4452 Comm: udevd Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106
 lockdep_rcu_suspicious+0x208/0x3a0 kernel/locking/lockdep.c:6719
 mt_slot lib/maple_tree.c:816 [inline]
 mt_slot lib/maple_tree.c:813 [inline]
 mtree_range_walk+0x602/0x940 lib/maple_tree.c:2976
 mas_state_walk lib/maple_tree.c:3868 [inline]
 mas_walk+0x393/0x7c0 lib/maple_tree.c:4980
 mas_find_setup lib/maple_tree.c:5924 [inline]
 mas_find+0x1cb/0x340 lib/maple_tree.c:5965
 vma_next include/linux/mm.h:865 [inline]
 validate_mm+0xd2/0x470 mm/mmap.c:301
 do_vmi_align_munmap+0x1199/0x1680 mm/mmap.c:2561
 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619
 __vm_munmap+0x137/0x380 mm/mmap.c:2899
 __do_sys_munmap mm/mmap.c:2916 [inline]
 __se_sys_munmap mm/mmap.c:2913 [inline]
 __x64_sys_munmap+0x62/0x80 mm/mmap.c:2913
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f71bd71d817
Code: ff ff 76 10 48 8b 15 10 36 0d 00 f7 d8 64 89 02 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 35 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffff4d4c838 EFLAGS: 00000206 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000055abef1135b0 RCX: 00007f71bd71d817
RDX: 000000055abef168 RSI: 0000000000906623 RDI: 00007f71bcc00000
RBP: 000055abef167000 R08: 0000000000000007 R09: e850bab6b4ae6ccd
R10: 00007ffff4d7f090 R11: 0000000000000206 R12: 000055abef1135e8
R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000
 </TASK>