syzkaller login: [ 38.982249] BUG: Bad rss-counter state mm:00000000fc4e1dd9 type:MM_FILEPAGES val:33 [ 38.983260] BUG: Bad rss-counter state mm:00000000fc4e1dd9 type:MM_ANONPAGES val:22 [ 39.142493] ================================================================== [ 39.143450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.144384] Read of size 8 at addr ffff88800dd4d880 by task sshd/218 [ 39.145174] [ 39.145397] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.146384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.147363] Call Trace: [ 39.147687] [ 39.147976] dump_stack_lvl+0x91/0xf0 [ 39.148476] print_report+0xcc/0x620 [ 39.148981] ? __virt_addr_valid+0x102/0x340 [ 39.149528] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.150135] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.150739] kasan_report+0xbe/0xf0 [ 39.151214] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.151839] vma_interval_tree_remove+0xc75/0xec0 [ 39.152437] vma_prepare+0xc54/0x11a0 [ 39.152933] __split_vma+0x5af/0x950 [ 39.153405] ? __pfx___split_vma+0x10/0x10 [ 39.153932] ? find_held_lock+0x2c/0x110 [ 39.154444] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.155002] ? lock_is_held_type+0x9f/0x120 [ 39.155538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.156134] ? mtree_range_walk+0x632/0x900 [ 39.156686] ? mas_walk+0x5c7/0x7c0 [ 39.157161] do_vmi_munmap+0x1f1/0x2b0 [ 39.157653] mmap_region+0x1f9/0x2660 [ 39.158131] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.158640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.159386] ? __pfx_lock_acquire+0x10/0x10 [ 39.159909] ? __pfx_mmap_region+0x10/0x10 [ 39.160438] ? security_mmap_addr+0x7d/0xa0 [ 39.161015] ? get_unmapped_area+0x1f5/0x3f0 [ 39.161563] do_mmap+0x854/0xf00 [ 39.162000] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.162493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.163050] ksys_mmap_pgoff+0x3af/0x500 [ 39.163556] do_syscall_64+0x3f/0x90 [ 39.164028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.164670] RIP: 0033:0x7ff8f691bd82 [ 39.165139] 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 [ 39.167324] RSP: 002b:00007ffec44c4168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.168242] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8f691bd82 [ 39.169113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8f5d55000 [ 39.169965] RBP: 00007ff8f5d55000 R08: 0000000000000009 R09: 0000000000001000 [ 39.170833] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea67698f70 [ 39.171702] R13: 00007ffec44c4180 R14: 00007ffec44c41b0 R15: 00007ffec44c4510 [ 39.172563] [ 39.172885] [ 39.173099] Allocated by task 211: [ 39.173535] kasan_save_stack+0x22/0x50 [ 39.174068] kasan_set_track+0x25/0x30 [ 39.174581] __kasan_slab_alloc+0x59/0x70 [ 39.175132] kmem_cache_alloc+0x16b/0x370 [ 39.175670] vm_area_dup+0x20/0x160 [ 39.176125] __split_vma+0x170/0x950 [ 39.176616] split_vma+0xc6/0x110 [ 39.177071] mprotect_fixup+0x8d2/0xb30 [ 39.177584] do_mprotect_pkey+0x87e/0xd40 [ 39.178121] __x64_sys_mprotect+0x78/0xc0 [ 39.178649] do_syscall_64+0x3f/0x90 [ 39.179127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.179778] [ 39.179996] Freed by task 211: [ 39.180385] kasan_save_stack+0x22/0x50 [ 39.180899] kasan_set_track+0x25/0x30 [ 39.181395] kasan_save_free_info+0x2b/0x50 [ 39.181929] __kasan_slab_free+0x10a/0x190 [ 39.182461] kmem_cache_free+0x10d/0x4d0 [ 39.182975] rcu_core+0x8c8/0x2860 [ 39.183423] __do_softirq+0x1b7/0x7d4 [ 39.183900] [ 39.184117] Last potentially related work creation: [ 39.184741] kasan_save_stack+0x22/0x50 [ 39.185258] __kasan_record_aux_stack+0x8e/0xa0 [ 39.185843] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.186513] remove_vma+0x139/0x170 [ 39.186975] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.187525] do_vmi_munmap+0x1f1/0x2b0 [ 39.188017] __vm_munmap+0x138/0x3a0 [ 39.188483] __x64_sys_munmap+0x59/0x80 [ 39.188995] do_syscall_64+0x3f/0x90 [ 39.189465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.190107] [ 39.190320] The buggy address belongs to the object at ffff88800dd4d828 [ 39.190320] which belongs to the cache vm_area_struct of size 168 [ 39.191786] The buggy address is located 88 bytes inside of [ 39.191786] freed 168-byte region [ffff88800dd4d828, ffff88800dd4d8d0) [ 39.193210] [ 39.193423] The buggy address belongs to the physical page: [ 39.194079] page:00000000c6b29b2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd4d [ 39.195207] memcg:ffff88800dcc4501 [ 39.195639] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.196361] page_type: 0xffffffff() [ 39.196818] raw: 0100000000000200 ffff88800879fc80 ffffea00003576c0 dead000000000005 [ 39.197773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcc4501 [ 39.198699] page dumped because: kasan: bad access detected [ 39.199363] [ 39.199581] Memory state around the buggy address: [ 39.200163] ffff88800dd4d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.201057] ffff88800dd4d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.201915] >ffff88800dd4d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.202785] ^ [ 39.203203] ffff88800dd4d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.204068] ffff88800dd4d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.204969] ================================================================== [ 39.206083] Disabling lock debugging due to kernel taint [ 42.022277] BUG: Bad rss-counter state mm:00000000a7ea179d type:MM_FILEPAGES val:33 [ 42.023330] BUG: Bad rss-counter state mm:00000000a7ea179d type:MM_ANONPAGES val:22 [ 42.455929] BUG: Bad rss-counter state mm:00000000609ea4b7 type:MM_FILEPAGES val:33 [ 42.456997] BUG: Bad rss-counter state mm:00000000609ea4b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20126' (ECDSA) to the list of known hosts. 2023/06/19 19:47:45 fuzzer started 2023/06/19 19:47:45 dialing manager at localhost:44161 2023/06/19 19:47:45 checking machine... 2023/06/19 19:47:45 checking revisions... [ 43.175824] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:47:45 testing simple program... [ 43.230642] cgroup: Unknown subsys name 'net' [ 43.283294] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:47:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014757940 RCX=0000000000000001 RDX=1ffff110028eaf40 RSI=ffffffff818953b0 RDI=ffff88801475794c RBP=ffff888014757a00 RSP=ffff888014757858 R8 =0000000000000001 R9 =ffff8880147578b8 R10=0000000000038001 R11=0000000000020c48 R12=ffff888014757940 R13=0000000000000000 R14=ffff888016b49b40 R15=ffff888015c44000 RIP=ffffffff813ad4f7 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 00007fba47cf2900 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=00007fba47141fa0 CR3=000000000c71e000 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=fe14ab7d1127411f00000000000ae988 XMM05=ccbe9d1d64ae373e0000000000134bf0 XMM06=19e9129bd510f2350000000000133a88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8449ef03 RDX=ffff888018e79b40 RSI=0000000000000002 RDI=0000000000000005 RBP=ffffffff84e38f20 RSP=ffff888017fc7cb8 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000003 R11=0000000000000000 R12=0000000000000003 R13=0000000000000005 R14=0000000000000003 R15=00007f0ac9497fff RIP=ffffffff814c0420 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0ac9463900 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=000055dc7c6863b0 CR3=000000000ea02000 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=6720646572637465733a4d41503d706f 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