=============================
WARNING: suspicious RCU usage
6.5.0-rc3-next-20230725 #1 Not tainted
-----------------------------
lib/maple_tree.c:839 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor.0/9620:
 #0: ffff8880166f38e0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1f9/0x940

stack backtrace:
CPU: 0 PID: 9620 Comm: syz-executor.0 Not tainted 6.5.0-rc3-next-20230725 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xc1/0xf0
 lockdep_rcu_suspicious+0x1f0/0x290
 mas_walk+0x4f7/0x7c0
 find_mergeable_anon_vma+0x102/0x880
 __anon_vma_prepare+0x7d/0x500
 do_wp_page+0x1d62/0x2f00
 __handle_mm_fault+0xdc8/0x2b90
 handle_mm_fault+0x2c1/0xb10
 do_user_addr_fault+0x382/0x1490
 exc_page_fault+0x9c/0x1a0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f74e622aef6
Code: 82 63 01 00 00 48 89 d1 f3 a4 c3 80 fa 08 73 12 80 fa 04 73 1e 80 fa 01 77 26 72 05 0f b6 0e 88 0f c3 48 8b 4c 16 f8 48 8b 36 <48> 89 4c 17 f8 48 89 37 c3 8b 4c 16 fc 8b 36 89 4c 17 fc 89 37 c3
RSP: 002b:00007ffc47637d98 EFLAGS: 00010246
RAX: 0000000020000100 RBX: 0000000000000000 RCX: 0031656c69662f2e
RDX: 0000000000000008 RSI: 0031656c69662f2e RDI: 0000000020000100
RBP: 00007ffc47637e58 R08: 00007f74e6747000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f74e6347510
R13: 00007ffc47637ea0 R14: 00007f74e6342f60 R15: 0000000000091ac0
 </TASK>

=============================
WARNING: suspicious RCU usage
6.5.0-rc3-next-20230725 #1 Not tainted
-----------------------------
lib/maple_tree.c:795 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor.0/9620:
 #0: ffff8880166f38e0 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x1f9/0x940

stack backtrace:
CPU: 0 PID: 9620 Comm: syz-executor.0 Not tainted 6.5.0-rc3-next-20230725 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xc1/0xf0
 lockdep_rcu_suspicious+0x1f0/0x290
 mtree_range_walk+0x67f/0x910
 mas_walk+0x394/0x7c0
 find_mergeable_anon_vma+0x102/0x880
 __anon_vma_prepare+0x7d/0x500
 do_wp_page+0x1d62/0x2f00
 __handle_mm_fault+0xdc8/0x2b90
 handle_mm_fault+0x2c1/0xb10
 do_user_addr_fault+0x382/0x1490
 exc_page_fault+0x9c/0x1a0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f74e622aef6
Code: 82 63 01 00 00 48 89 d1 f3 a4 c3 80 fa 08 73 12 80 fa 04 73 1e 80 fa 01 77 26 72 05 0f b6 0e 88 0f c3 48 8b 4c 16 f8 48 8b 36 <48> 89 4c 17 f8 48 89 37 c3 8b 4c 16 fc 8b 36 89 4c 17 fc 89 37 c3
RSP: 002b:00007ffc47637d98 EFLAGS: 00010246
RAX: 0000000020000100 RBX: 0000000000000000 RCX: 0031656c69662f2e
RDX: 0000000000000008 RSI: 0031656c69662f2e RDI: 0000000020000100
RBP: 00007ffc47637e58 R08: 00007f74e6747000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f74e6347510
R13: 00007ffc47637ea0 R14: 00007f74e6342f60 R15: 0000000000091ac0
 </TASK>
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present
sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 02 00
I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 8 prio class 2
Buffer I/O error on dev sr0, logical block 0, async page read
Buffer I/O error on dev sr0, logical block 1, async page read
Buffer I/O error on dev sr0, logical block 2, async page read
Buffer I/O error on dev sr0, logical block 3, async page read
Buffer I/O error on dev sr0, logical block 4, async page read
Buffer I/O error on dev sr0, logical block 5, async page read
Buffer I/O error on dev sr0, logical block 6, async page read
Buffer I/O error on dev sr0, logical block 7, async page read
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present
sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 02 00
I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 8 prio class 2
Buffer I/O error on dev sr0, logical block 0, async page read
Buffer I/O error on dev sr0, logical block 1, async page read