syzkaller login: [ 30.290646] BUG: Bad rss-counter state mm:00000000c23bc21d type:MM_FILEPAGES val:33 [ 30.291349] BUG: Bad rss-counter state mm:00000000c23bc21d type:MM_ANONPAGES val:22 [ 30.456398] ================================================================== [ 30.457026] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.457638] Read of size 8 at addr ffff88801a55fdf0 by task sshd/219 [ 30.458132] [ 30.458285] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.458844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.459473] Call Trace: [ 30.459683] [ 30.459870] dump_stack_lvl+0x91/0xf0 [ 30.460188] print_report+0xcc/0x620 [ 30.460507] ? __virt_addr_valid+0x102/0x340 [ 30.461842] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.462251] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.462650] kasan_report+0xbe/0xf0 [ 30.463015] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.463420] vma_interval_tree_remove+0xc75/0xec0 [ 30.463860] vma_prepare+0xc54/0x11a0 [ 30.464174] __split_vma+0x5af/0x950 [ 30.464491] ? __pfx___split_vma+0x10/0x10 [ 30.464928] ? find_held_lock+0x2c/0x110 [ 30.465275] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.465642] ? lock_is_held_type+0x9f/0x120 [ 30.466049] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.466452] ? mtree_range_walk+0x632/0x900 [ 30.466863] ? mas_walk+0x5c7/0x7c0 [ 30.467180] do_vmi_munmap+0x1f1/0x2b0 [ 30.467500] mmap_region+0x1f9/0x2660 [ 30.467863] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.468197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.468666] ? __pfx_lock_acquire+0x10/0x10 [ 30.469105] ? __pfx_mmap_region+0x10/0x10 [ 30.469452] ? security_mmap_addr+0x7d/0xa0 [ 30.469853] ? get_unmapped_area+0x1f5/0x3f0 [ 30.470213] do_mmap+0x854/0xf00 [ 30.470508] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.470889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.471257] ksys_mmap_pgoff+0x3af/0x500 [ 30.471588] do_syscall_64+0x3f/0x90 [ 30.471954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.472378] RIP: 0033:0x7f2b566d5d82 [ 30.472676] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.474174] RSP: 002b:00007ffd484796b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.474809] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b566d5d82 [ 30.475364] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b55b0f000 [ 30.475962] RBP: 00007f2b55b0f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.476510] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce45453f70 [ 30.477145] R13: 00007ffd484796d0 R14: 00007ffd48479700 R15: 00007ffd48479a60 [ 30.477758] [ 30.477957] [ 30.478099] Allocated by task 212: [ 30.478375] kasan_save_stack+0x22/0x50 [ 30.478747] kasan_set_track+0x25/0x30 [ 30.479070] __kasan_slab_alloc+0x59/0x70 [ 30.479415] kmem_cache_alloc+0x16b/0x370 [ 30.479799] vm_area_dup+0x20/0x160 [ 30.480098] __split_vma+0x170/0x950 [ 30.480402] split_vma+0xc6/0x110 [ 30.480686] mprotect_fixup+0x8d2/0xb30 [ 30.481103] do_mprotect_pkey+0x87e/0xd40 [ 30.481450] __x64_sys_mprotect+0x78/0xc0 [ 30.481846] do_syscall_64+0x3f/0x90 [ 30.482159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.482577] [ 30.482768] Freed by task 212: [ 30.483024] kasan_save_stack+0x22/0x50 [ 30.483361] kasan_set_track+0x25/0x30 [ 30.483683] kasan_save_free_info+0x2b/0x50 [ 30.484083] __kasan_slab_free+0x10a/0x190 [ 30.484431] kmem_cache_free+0x10d/0x4d0 [ 30.484846] rcu_core+0x8c8/0x2860 [ 30.485136] __do_softirq+0x1b7/0x7d4 [ 30.485457] [ 30.485598] Last potentially related work creation: [ 30.486031] kasan_save_stack+0x22/0x50 [ 30.486360] __kasan_record_aux_stack+0x8e/0xa0 [ 30.486776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.487195] remove_vma+0x139/0x170 [ 30.487497] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.487914] do_vmi_munmap+0x1f1/0x2b0 [ 30.488237] __vm_munmap+0x138/0x3a0 [ 30.488539] __x64_sys_munmap+0x59/0x80 [ 30.488947] do_syscall_64+0x3f/0x90 [ 30.489260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.489681] [ 30.489880] The buggy address belongs to the object at ffff88801a55fd98 [ 30.489880] which belongs to the cache vm_area_struct of size 168 [ 30.490875] The buggy address is located 88 bytes inside of [ 30.490875] freed 168-byte region [ffff88801a55fd98, ffff88801a55fe40) [ 30.491836] [ 30.491980] The buggy address belongs to the physical page: [ 30.492407] page:00000000e0f531ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a55f [ 30.493192] memcg:ffff888019906401 [ 30.493477] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.493951] page_type: 0xffffffff() [ 30.494250] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.494887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019906401 [ 30.495470] page dumped because: kasan: bad access detected [ 30.495948] [ 30.496090] Memory state around the buggy address: [ 30.496462] ffff88801a55fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.497101] ffff88801a55fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.497653] >ffff88801a55fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.498251] ^ [ 30.498806] ffff88801a55fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.499363] ffff88801a55fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.499960] ================================================================== [ 30.512838] Disabling lock debugging due to kernel taint [ 33.496025] BUG: Bad rss-counter state mm:00000000e2abb7b8 type:MM_FILEPAGES val:33 [ 33.496677] BUG: Bad rss-counter state mm:00000000e2abb7b8 type:MM_ANONPAGES val:22 [ 34.596858] BUG: Bad rss-counter state mm:000000005abfd011 type:MM_FILEPAGES val:33 [ 34.597537] BUG: Bad rss-counter state mm:000000005abfd011 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54225' (ECDSA) to the list of known hosts. 2023/06/21 10:21:37 fuzzer started 2023/06/21 10:21:37 dialing manager at localhost:36067 2023/06/21 10:21:38 checking machine... 2023/06/21 10:21:38 checking revisions... [ 35.501756] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:21:38 testing simple program... [ 35.545591] cgroup: Unknown subsys name 'net' [ 35.605789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:21:37 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000007 RCX=ffffffff844a6399 RDX=ffff88800c681b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888014225cc0 RSP=ffff888017db77b0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888017db7aa8 R14=ffff888017db78e8 R15=dffffc0000000000 RIP=ffffffff814c086b RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1f3ec2a900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00005624411e9000 CR3=000000000c6b4000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806cf09c70 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff1100d9e138f RIP=ffffffff845368c8 RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f8718874328 CR3=0000000018d88000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000