syzkaller login: [ 30.967699] BUG: Bad rss-counter state mm:0000000024aa6293 type:MM_FILEPAGES val:33 [ 30.968703] BUG: Bad rss-counter state mm:0000000024aa6293 type:MM_ANONPAGES val:22 [ 31.136401] ================================================================== [ 31.137339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.138287] Read of size 8 at addr ffff88800dca93f8 by task sshd/221 [ 31.139071] [ 31.139390] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.140257] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.141219] Call Trace: [ 31.141542] [ 31.141822] dump_stack_lvl+0x91/0xf0 [ 31.142317] print_report+0xcc/0x620 [ 31.142798] ? __virt_addr_valid+0x102/0x340 [ 31.143354] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143976] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144596] kasan_report+0xbe/0xf0 [ 31.145067] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145687] vma_interval_tree_remove+0xc75/0xec0 [ 31.146293] vma_prepare+0xc54/0x11a0 [ 31.146767] __split_vma+0x5af/0x950 [ 31.147270] ? __pfx___split_vma+0x10/0x10 [ 31.147793] ? find_held_lock+0x2c/0x110 [ 31.148306] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.148870] ? lock_is_held_type+0x9f/0x120 [ 31.149402] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.150003] ? mtree_range_walk+0x632/0x900 [ 31.150558] ? mas_walk+0x5c7/0x7c0 [ 31.151038] do_vmi_munmap+0x1f1/0x2b0 [ 31.151525] mmap_region+0x1f9/0x2660 [ 31.152002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.152516] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.153224] ? __pfx_lock_acquire+0x10/0x10 [ 31.153759] ? __pfx_mmap_region+0x10/0x10 [ 31.154287] ? security_mmap_addr+0x7d/0xa0 [ 31.154819] ? get_unmapped_area+0x1f5/0x3f0 [ 31.155396] do_mmap+0x854/0xf00 [ 31.155839] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.156331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.156893] ksys_mmap_pgoff+0x3af/0x500 [ 31.157399] do_syscall_64+0x3f/0x90 [ 31.157873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.158512] RIP: 0033:0x7ff7024dad82 [ 31.158996] 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 [ 31.161112] RSP: 002b:00007fff24ba5c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.162003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7024dad82 [ 31.162845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff701914000 [ 31.163703] RBP: 00007ff701914000 R08: 0000000000000009 R09: 0000000000001000 [ 31.164538] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f81759fec0 [ 31.165376] R13: 00007fff24ba5c70 R14: 00007fff24ba5ca0 R15: 00007fff24ba6000 [ 31.166233] [ 31.166526] [ 31.166741] Allocated by task 214: [ 31.167172] kasan_save_stack+0x22/0x50 [ 31.167672] kasan_set_track+0x25/0x30 [ 31.168162] __kasan_slab_alloc+0x59/0x70 [ 31.168690] kmem_cache_alloc+0x16b/0x370 [ 31.169203] vm_area_dup+0x20/0x160 [ 31.169656] __split_vma+0x170/0x950 [ 31.170120] split_vma+0xc6/0x110 [ 31.170560] mprotect_fixup+0x8d2/0xb30 [ 31.171091] do_mprotect_pkey+0x87e/0xd40 [ 31.171612] __x64_sys_mprotect+0x78/0xc0 [ 31.172127] do_syscall_64+0x3f/0x90 [ 31.172596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.173234] [ 31.173451] Freed by task 214: [ 31.173842] kasan_save_stack+0x22/0x50 [ 31.174342] kasan_set_track+0x25/0x30 [ 31.174831] kasan_save_free_info+0x2b/0x50 [ 31.175376] __kasan_slab_free+0x10a/0x190 [ 31.175909] kmem_cache_free+0x10d/0x4d0 [ 31.176415] rcu_core+0x8c8/0x2860 [ 31.176856] __do_softirq+0x1b7/0x7d4 [ 31.177330] [ 31.177544] Last potentially related work creation: [ 31.178130] kasan_save_stack+0x22/0x50 [ 31.178631] __kasan_record_aux_stack+0x8e/0xa0 [ 31.179233] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.179869] remove_vma+0x139/0x170 [ 31.180319] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.180881] do_vmi_munmap+0x1f1/0x2b0 [ 31.181360] __vm_munmap+0x138/0x3a0 [ 31.181822] __x64_sys_munmap+0x59/0x80 [ 31.182310] do_syscall_64+0x3f/0x90 [ 31.182782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183432] [ 31.183649] The buggy address belongs to the object at ffff88800dca93a0 [ 31.183649] which belongs to the cache vm_area_struct of size 168 [ 31.185105] The buggy address is located 88 bytes inside of [ 31.185105] freed 168-byte region [ffff88800dca93a0, ffff88800dca9448) [ 31.186493] [ 31.186710] The buggy address belongs to the physical page: [ 31.187376] page:0000000088f9847b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdca9 [ 31.188449] memcg:ffff888016ee3501 [ 31.188884] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.189529] page_type: 0xffffffff() [ 31.189977] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.190909] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ee3501 [ 31.191817] page dumped because: kasan: bad access detected [ 31.192482] [ 31.192695] Memory state around the buggy address: [ 31.193270] ffff88800dca9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.194122] ffff88800dca9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.194981] >ffff88800dca9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.195826] ^ [ 31.196674] ffff88800dca9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.197554] ffff88800dca9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.198443] ================================================================== [ 31.199854] Disabling lock debugging due to kernel taint [ 33.076748] BUG: Bad rss-counter state mm:00000000cd825878 type:MM_FILEPAGES val:33 [ 33.077774] BUG: Bad rss-counter state mm:00000000cd825878 type:MM_ANONPAGES val:22 [ 33.612351] BUG: Bad rss-counter state mm:00000000a9a1b8f0 type:MM_FILEPAGES val:33 [ 33.613517] BUG: Bad rss-counter state mm:00000000a9a1b8f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25850' (ECDSA) to the list of known hosts. 2023/06/21 03:12:24 fuzzer started 2023/06/21 03:12:25 dialing manager at localhost:36067 2023/06/21 03:12:25 checking machine... 2023/06/21 03:12:25 checking revisions... [ 34.252071] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:12:25 testing simple program... [ 34.305641] cgroup: Unknown subsys name 'net' [ 34.372787] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:12:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1354 RSI=ffff88801665fa80 RDI=ffff88806ce09aa0 RBP=ffff88801665fa80 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b3f09 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88801665fa80 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007fcc69d0b900 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=00007fcc69cd5008 CR3=0000000009704000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f5397a7cc80 CR3=000000000f5f6000 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=2034323a32313a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a32313a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000