syzkaller login: [ 29.089615] BUG: Bad rss-counter state mm:00000000c92210b3 type:MM_FILEPAGES val:33 [ 29.090844] BUG: Bad rss-counter state mm:00000000c92210b3 type:MM_ANONPAGES val:22 [ 29.135134] ================================================================== [ 29.136247] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.137161] Read of size 8 at addr ffff88800d841880 by task sshd/222 [ 29.137911] [ 29.138131] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.138995] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.139955] Call Trace: [ 29.140274] [ 29.140560] dump_stack_lvl+0x91/0xf0 [ 29.141041] print_report+0xcc/0x620 [ 29.141517] ? __virt_addr_valid+0x102/0x340 [ 29.142058] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.142683] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.143290] kasan_report+0xbe/0xf0 [ 29.143756] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.144366] vma_interval_tree_remove+0xc75/0xec0 [ 29.144964] vma_prepare+0xc54/0x11a0 [ 29.145440] __split_vma+0x5af/0x950 [ 29.145903] ? __pfx___split_vma+0x10/0x10 [ 29.146444] ? find_held_lock+0x2c/0x110 [ 29.146960] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.147521] ? lock_is_held_type+0x9f/0x120 [ 29.148051] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.148650] ? mtree_range_walk+0x632/0x900 [ 29.149190] ? mas_walk+0x5c7/0x7c0 [ 29.149654] do_vmi_munmap+0x1f1/0x2b0 [ 29.150146] mmap_region+0x1f9/0x2660 [ 29.150631] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.151141] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.151851] ? __pfx_lock_acquire+0x10/0x10 [ 29.152376] ? __pfx_mmap_region+0x10/0x10 [ 29.152901] ? security_mmap_addr+0x7d/0xa0 [ 29.153428] ? get_unmapped_area+0x1f5/0x3f0 [ 29.153970] do_mmap+0x854/0xf00 [ 29.154416] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.154913] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.155466] ksys_mmap_pgoff+0x3af/0x500 [ 29.155964] do_syscall_64+0x3f/0x90 [ 29.156437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.157083] RIP: 0033:0x7f12daff7d82 [ 29.157532] 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 [ 29.159638] RSP: 002b:00007ffc2ca65e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.160533] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12daff7d82 [ 29.161374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12da431000 [ 29.162211] RBP: 00007f12da431000 R08: 0000000000000009 R09: 0000000000001000 [ 29.163060] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609be6cbec0 [ 29.163889] R13: 00007ffc2ca65e30 R14: 00007ffc2ca65e60 R15: 00007ffc2ca661c0 [ 29.164738] [ 29.165029] [ 29.165241] Allocated by task 214: [ 29.165667] kasan_save_stack+0x22/0x50 [ 29.166168] kasan_set_track+0x25/0x30 [ 29.166682] __kasan_slab_alloc+0x59/0x70 [ 29.167195] kmem_cache_alloc+0x16b/0x370 [ 29.167712] vm_area_dup+0x20/0x160 [ 29.168164] __split_vma+0x170/0x950 [ 29.168627] split_vma+0xc6/0x110 [ 29.169059] mprotect_fixup+0x8d2/0xb30 [ 29.169554] do_mprotect_pkey+0x87e/0xd40 [ 29.170067] __x64_sys_mprotect+0x78/0xc0 [ 29.170601] do_syscall_64+0x3f/0x90 [ 29.171067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.171698] [ 29.171910] Freed by task 214: [ 29.172302] kasan_save_stack+0x22/0x50 [ 29.172800] kasan_set_track+0x25/0x30 [ 29.173284] kasan_save_free_info+0x2b/0x50 [ 29.173818] __kasan_slab_free+0x10a/0x190 [ 29.174342] kmem_cache_free+0x10d/0x4d0 [ 29.174879] rcu_core+0x8c8/0x2860 [ 29.175325] __do_softirq+0x1b7/0x7d4 [ 29.175800] [ 29.176013] Last potentially related work creation: [ 29.176591] kasan_save_stack+0x22/0x50 [ 29.177181] __kasan_record_aux_stack+0x8e/0xa0 [ 29.177748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.178391] remove_vma+0x139/0x170 [ 29.178845] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.179403] do_vmi_munmap+0x1f1/0x2b0 [ 29.179891] __vm_munmap+0x138/0x3a0 [ 29.180352] __x64_sys_munmap+0x59/0x80 [ 29.180851] do_syscall_64+0x3f/0x90 [ 29.181319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.181954] [ 29.182173] The buggy address belongs to the object at ffff88800d841828 [ 29.182173] which belongs to the cache vm_area_struct of size 168 [ 29.183639] The buggy address is located 88 bytes inside of [ 29.183639] freed 168-byte region [ffff88800d841828, ffff88800d8418d0) [ 29.185021] [ 29.185233] The buggy address belongs to the physical page: [ 29.185896] page:0000000088e97f9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd841 [ 29.186976] memcg:ffff88800f5fe101 [ 29.187397] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.188044] page_type: 0xffffffff() [ 29.188496] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.189401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5fe101 [ 29.190293] page dumped because: kasan: bad access detected [ 29.190953] [ 29.191169] Memory state around the buggy address: [ 29.191744] ffff88800d841780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.192599] ffff88800d841800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.193444] >ffff88800d841880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.194292] ^ [ 29.194717] ffff88800d841900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.195576] ffff88800d841980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.196420] ================================================================== [ 29.197412] Disabling lock debugging due to kernel taint [ 31.555926] BUG: Bad rss-counter state mm:000000003c356f5a type:MM_FILEPAGES val:33 [ 31.557155] BUG: Bad rss-counter state mm:000000003c356f5a type:MM_ANONPAGES val:22 [ 31.959034] BUG: Bad rss-counter state mm:00000000c8a30fc1 type:MM_FILEPAGES val:33 [ 31.960519] BUG: Bad rss-counter state mm:00000000c8a30fc1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13384' (ECDSA) to the list of known hosts. 2023/06/20 03:49:28 fuzzer started 2023/06/20 03:49:29 dialing manager at localhost:44161 2023/06/20 03:49:29 checking machine... 2023/06/20 03:49:29 checking revisions... [ 32.708917] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:49:29 testing simple program... [ 32.767506] cgroup: Unknown subsys name 'net' [ 32.807474] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:49:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100d9b131f RSI=ffffffff818d51fd RDI=0000000000000005 RBP=ffff888015ce7c58 RSP=ffff888015ce7930 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88806cd898f8 R13=ffff8880165a2a48 R14=ffff888015ce7c80 R15=ffff888015ce7c58 RIP=ffffffff818d5212 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 00007f9d64f42900 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=00007f9d64346590 CR3=000000000c9a4000 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=9be049582cf778da00000000000ae988 XMM05=adff19397defb36300000000001348e0 XMM06=00c3ffa147b8d85700000000001336d0 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=0000000000000001 RCX=ffffffff86137501 RDX=1ffff11002ddcee0 RSI=ffffffff8180c585 RDI=ffff888016ee76a8 RBP=ffff888016ee7700 RSP=ffff888016ee7638 R8 =ffffffff8613751e R9 =ffff888016ee76e8 R10=0000000000038001 R11=0000000000020d8a R12=ffff888016ee7770 R13=0000000000000000 R14=ffff888015eeb680 R15=ffff888016ee76a8 RIP=ffffffff8113062c 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 00007f576b55d900 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=000055b34cd43954 CR3=000000000f0be000 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