syzkaller login: [ 34.784811] BUG: Bad rss-counter state mm:00000000a1090dbb type:MM_FILEPAGES val:33 [ 34.786036] BUG: Bad rss-counter state mm:00000000a1090dbb type:MM_ANONPAGES val:22 [ 34.824005] ================================================================== [ 34.825031] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.825950] Read of size 8 at addr ffff888009499310 by task sshd/221 [ 34.826709] [ 34.826923] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.827814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.828776] Call Trace: [ 34.829091] [ 34.829372] dump_stack_lvl+0x91/0xf0 [ 34.829857] print_report+0xcc/0x620 [ 34.830333] ? __virt_addr_valid+0x102/0x340 [ 34.830887] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.831514] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.832127] kasan_report+0xbe/0xf0 [ 34.832599] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.833214] vma_interval_tree_remove+0xc75/0xec0 [ 34.833811] vma_prepare+0xc54/0x11a0 [ 34.834294] __split_vma+0x5af/0x950 [ 34.834774] ? __pfx___split_vma+0x10/0x10 [ 34.835312] ? find_held_lock+0x2c/0x110 [ 34.835829] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.836385] ? lock_is_held_type+0x9f/0x120 [ 34.836921] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.837519] ? mtree_range_walk+0x632/0x900 [ 34.838063] ? mas_walk+0x5c7/0x7c0 [ 34.838536] do_vmi_munmap+0x1f1/0x2b0 [ 34.839029] mmap_region+0x1f9/0x2660 [ 34.839532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.840045] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.840755] ? __pfx_lock_acquire+0x10/0x10 [ 34.841292] ? __pfx_mmap_region+0x10/0x10 [ 34.841821] ? security_mmap_addr+0x7d/0xa0 [ 34.842355] ? get_unmapped_area+0x1f5/0x3f0 [ 34.842899] do_mmap+0x854/0xf00 [ 34.843345] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.843839] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.844402] ksys_mmap_pgoff+0x3af/0x500 [ 34.844907] do_syscall_64+0x3f/0x90 [ 34.845384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.846024] RIP: 0033:0x7f498c378d82 [ 34.846480] 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 [ 34.848610] RSP: 002b:00007ffc5e5662a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.849518] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f498c378d82 [ 34.850366] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f498b7b2000 [ 34.851227] RBP: 00007f498b7b2000 R08: 0000000000000009 R09: 0000000000001000 [ 34.852258] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e49b02aec0 [ 34.853115] R13: 00007ffc5e5662c0 R14: 00007ffc5e5662f0 R15: 00007ffc5e566650 [ 34.853976] [ 34.854281] [ 34.854494] Allocated by task 214: [ 34.854916] kasan_save_stack+0x22/0x50 [ 34.855427] kasan_set_track+0x25/0x30 [ 34.855923] __kasan_slab_alloc+0x59/0x70 [ 34.856440] kmem_cache_alloc+0x16b/0x370 [ 34.856978] vm_area_dup+0x20/0x160 [ 34.857464] __split_vma+0x170/0x950 [ 34.857970] split_vma+0xc6/0x110 [ 34.858441] mprotect_fixup+0x8d2/0xb30 [ 34.858974] do_mprotect_pkey+0x87e/0xd40 [ 34.859536] __x64_sys_mprotect+0x78/0xc0 [ 34.860089] do_syscall_64+0x3f/0x90 [ 34.860597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.861290] [ 34.861518] Freed by task 214: [ 34.861936] kasan_save_stack+0x22/0x50 [ 34.862475] kasan_set_track+0x25/0x30 [ 34.863002] kasan_save_free_info+0x2b/0x50 [ 34.863593] __kasan_slab_free+0x10a/0x190 [ 34.864164] kmem_cache_free+0x10d/0x4d0 [ 34.864709] rcu_core+0x8c8/0x2860 [ 34.865182] __do_softirq+0x1b7/0x7d4 [ 34.865690] [ 34.865918] Last potentially related work creation: [ 34.866547] kasan_save_stack+0x22/0x50 [ 34.867093] __kasan_record_aux_stack+0x8e/0xa0 [ 34.867711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.868410] remove_vma+0x139/0x170 [ 34.868893] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.869488] do_vmi_munmap+0x1f1/0x2b0 [ 34.870006] __vm_munmap+0x138/0x3a0 [ 34.870507] __x64_sys_munmap+0x59/0x80 [ 34.871040] do_syscall_64+0x3f/0x90 [ 34.871557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.872249] [ 34.872480] The buggy address belongs to the object at ffff8880094992b8 [ 34.872480] which belongs to the cache vm_area_struct of size 168 [ 34.874067] The buggy address is located 88 bytes inside of [ 34.874067] freed 168-byte region [ffff8880094992b8, ffff888009499360) [ 34.875603] [ 34.875831] The buggy address belongs to the physical page: [ 34.876538] page:00000000d3b32f92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9499 [ 34.877703] memcg:ffff88800cea1501 [ 34.878161] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.878853] page_type: 0xffffffff() [ 34.879342] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.880329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cea1501 [ 34.881301] page dumped because: kasan: bad access detected [ 34.881999] [ 34.882214] Memory state around the buggy address: [ 34.882801] ffff888009499200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 34.883663] ffff888009499280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.884528] >ffff888009499300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.885375] ^ [ 34.885841] ffff888009499380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.886690] ffff888009499400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.887552] ================================================================== [ 34.888660] Disabling lock debugging due to kernel taint [ 37.157818] BUG: Bad rss-counter state mm:00000000344b7c0c type:MM_FILEPAGES val:33 [ 37.158825] BUG: Bad rss-counter state mm:00000000344b7c0c type:MM_ANONPAGES val:22 [ 37.538640] BUG: Bad rss-counter state mm:000000000cee5b71 type:MM_FILEPAGES val:31 [ 37.539706] BUG: Bad rss-counter state mm:000000000cee5b71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40723' (ECDSA) to the list of known hosts. 2023/06/20 05:07:11 fuzzer started 2023/06/20 05:07:11 dialing manager at localhost:44161 2023/06/20 05:07:11 checking machine... 2023/06/20 05:07:11 checking revisions... [ 38.267342] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:07:11 testing simple program... [ 38.320294] cgroup: Unknown subsys name 'net' [ 38.359428] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:07:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed10028faf99 RCX=0000000000000003 RDX=ffff88800e7ab680 RSI=ffffc90000683048 RDI=ffff8880147d7d70 RBP=ffffc90000683048 RSP=ffff8880147d7cc8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=ffff8880147d7e30 R13=dffffc0000000000 R14=ffff8880147d7e30 R15=ffffc90000683000 RIP=ffffffff815ab14e 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 00007fc991ddc900 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=00007fc9911f57f8 CR3=000000000ca60000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5087a3e878675b2000000000000ae988 XMM05=3fe35398098a5ee80000000000135a40 XMM06=e4cb8bb95a7664b60000000000134b88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff856528e0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=00007f3517317477 RSP=ffff88800dc778a8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f3517317477 R13=0000000000000000 R14=ffff88800e00d1c0 R15=0000000000000cc0 RIP=ffffffff812d8e1e 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 00007f3516e24900 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=00007f35173db618 CR3=000000000e976000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000