syzkaller login: [ 30.970940] BUG: Bad rss-counter state mm:000000004cfd778b type:MM_FILEPAGES val:33 [ 30.971955] BUG: Bad rss-counter state mm:000000004cfd778b type:MM_ANONPAGES val:22 [ 31.134506] ================================================================== [ 31.135385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.136313] Read of size 8 at addr ffff8880143a0df0 by task sshd/220 [ 31.137071] [ 31.137436] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.138334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.139284] Call Trace: [ 31.139597] [ 31.139876] dump_stack_lvl+0x91/0xf0 [ 31.140362] print_report+0xcc/0x620 [ 31.140843] ? __virt_addr_valid+0x102/0x340 [ 31.141394] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142032] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142650] kasan_report+0xbe/0xf0 [ 31.143115] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143736] vma_interval_tree_remove+0xc75/0xec0 [ 31.144329] vma_prepare+0xc54/0x11a0 [ 31.144804] __split_vma+0x5af/0x950 [ 31.145271] ? __pfx___split_vma+0x10/0x10 [ 31.145799] ? find_held_lock+0x2c/0x110 [ 31.146311] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.146862] ? lock_is_held_type+0x9f/0x120 [ 31.147391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.147989] ? mtree_range_walk+0x632/0x900 [ 31.148539] ? mas_walk+0x5c7/0x7c0 [ 31.149012] do_vmi_munmap+0x1f1/0x2b0 [ 31.149499] mmap_region+0x1f9/0x2660 [ 31.149999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.150507] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.151206] ? __pfx_lock_acquire+0x10/0x10 [ 31.151736] ? __pfx_mmap_region+0x10/0x10 [ 31.152254] ? security_mmap_addr+0x7d/0xa0 [ 31.152772] ? get_unmapped_area+0x1f5/0x3f0 [ 31.153318] do_mmap+0x854/0xf00 [ 31.153773] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.154263] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.154814] ksys_mmap_pgoff+0x3af/0x500 [ 31.155316] do_syscall_64+0x3f/0x90 [ 31.155795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.156436] RIP: 0033:0x7ff848931d82 [ 31.156886] 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 [ 31.158983] RSP: 002b:00007ffe8402e2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.159866] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff848931d82 [ 31.160698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff847d6b000 [ 31.161538] RBP: 00007ff847d6b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.162365] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df73220d90 [ 31.163197] R13: 00007ffe8402e300 R14: 00007ffe8402e330 R15: 00007ffe8402e690 [ 31.164037] [ 31.164327] [ 31.164538] Allocated by task 213: [ 31.164959] kasan_save_stack+0x22/0x50 [ 31.165459] kasan_set_track+0x25/0x30 [ 31.165967] __kasan_slab_alloc+0x59/0x70 [ 31.166485] kmem_cache_alloc+0x16b/0x370 [ 31.166996] vm_area_dup+0x20/0x160 [ 31.167442] __split_vma+0x170/0x950 [ 31.167903] split_vma+0xc6/0x110 [ 31.168338] mprotect_fixup+0x8d2/0xb30 [ 31.168830] do_mprotect_pkey+0x87e/0xd40 [ 31.169348] __x64_sys_mprotect+0x78/0xc0 [ 31.169868] do_syscall_64+0x3f/0x90 [ 31.170339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170967] [ 31.171178] Freed by task 19: [ 31.171557] kasan_save_stack+0x22/0x50 [ 31.172051] kasan_set_track+0x25/0x30 [ 31.172541] kasan_save_free_info+0x2b/0x50 [ 31.173066] __kasan_slab_free+0x10a/0x190 [ 31.173596] kmem_cache_free+0x10d/0x4d0 [ 31.174095] rcu_core+0x8c8/0x2860 [ 31.174538] __do_softirq+0x1b7/0x7d4 [ 31.175013] [ 31.175234] Last potentially related work creation: [ 31.175807] kasan_save_stack+0x22/0x50 [ 31.176307] __kasan_record_aux_stack+0x8e/0xa0 [ 31.176875] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.177520] remove_vma+0x139/0x170 [ 31.177965] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.178516] do_vmi_munmap+0x1f1/0x2b0 [ 31.179028] __vm_munmap+0x138/0x3a0 [ 31.179493] __x64_sys_munmap+0x59/0x80 [ 31.179982] do_syscall_64+0x3f/0x90 [ 31.180448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181084] [ 31.181297] The buggy address belongs to the object at ffff8880143a0d98 [ 31.181297] which belongs to the cache vm_area_struct of size 168 [ 31.182747] The buggy address is located 88 bytes inside of [ 31.182747] freed 168-byte region [ffff8880143a0d98, ffff8880143a0e40) [ 31.184121] [ 31.184332] The buggy address belongs to the physical page: [ 31.184976] page:00000000d20729ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x143a0 [ 31.186056] memcg:ffff888014118801 [ 31.186473] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.187107] page_type: 0xffffffff() [ 31.187554] raw: 0100000000000200 ffff8880087a0c80 ffffea0000262980 0000000000000004 [ 31.188452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014118801 [ 31.189341] page dumped because: kasan: bad access detected [ 31.190019] [ 31.190236] Memory state around the buggy address: [ 31.190814] ffff8880143a0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.191663] ffff8880143a0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.192508] >ffff8880143a0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.193338] ^ [ 31.194139] ffff8880143a0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.194978] ffff8880143a0e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.195817] ================================================================== [ 31.196718] Disabling lock debugging due to kernel taint [ 33.133933] BUG: Bad rss-counter state mm:000000008a37c9d6 type:MM_FILEPAGES val:33 [ 33.134782] BUG: Bad rss-counter state mm:000000008a37c9d6 type:MM_ANONPAGES val:22 [ 33.669921] BUG: Bad rss-counter state mm:00000000d0d56e50 type:MM_FILEPAGES val:33 [ 33.671131] BUG: Bad rss-counter state mm:00000000d0d56e50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59609' (ECDSA) to the list of known hosts. 2023/06/20 15:04:36 fuzzer started 2023/06/20 15:04:36 dialing manager at localhost:36067 2023/06/20 15:04:36 checking machine... 2023/06/20 15:04:36 checking revisions... [ 34.331721] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:04:36 testing simple program... [ 34.377132] cgroup: Unknown subsys name 'net' [ 34.438490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:04:36 Registers: info registers vcpu 0 RAX=ffffffff815a72a6 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff88800d7e7d28 RSP=ffff88800d7e7c58 R8 =0000000000000006 R9 =0000000000000101 R10=0000000000000094 R11=0000000000000000 R12=0000000000000015 R13=ffff88800d7e7d60 R14=0000000000000015 R15=ffffc9000068d520 RIP=ffffffff814c0860 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 00007fc7388a0900 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=00007fc737d04da0 CR3=000000000c670000 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=bfb8274566c9b88700000000000ae988 XMM05=6c80a87f560943650000000000132950 XMM06=19e9129bd510f23500000000001317e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=ffff888008c04400 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=00007f45829b70b0 CR3=00000000167e4000 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=2036333a34303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34303a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000