syzkaller login: [ 40.133177] BUG: Bad rss-counter state mm:00000000c4c3e66d type:MM_FILEPAGES val:33 [ 40.134360] BUG: Bad rss-counter state mm:00000000c4c3e66d type:MM_ANONPAGES val:22 [ 40.173322] ================================================================== [ 40.174379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.175519] Read of size 8 at addr ffff88801596e6b0 by task sshd/220 [ 40.176361] [ 40.176658] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.177612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.178650] Call Trace: [ 40.179050] [ 40.179344] dump_stack_lvl+0x91/0xf0 [ 40.179849] print_report+0xcc/0x620 [ 40.180335] ? __virt_addr_valid+0x102/0x340 [ 40.180885] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.181514] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.182133] kasan_report+0xbe/0xf0 [ 40.182621] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.183265] vma_interval_tree_remove+0xc75/0xec0 [ 40.183894] vma_prepare+0xc54/0x11a0 [ 40.184381] __split_vma+0x5af/0x950 [ 40.184868] ? __pfx___split_vma+0x10/0x10 [ 40.185419] ? find_held_lock+0x2c/0x110 [ 40.185954] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.186536] ? lock_is_held_type+0x9f/0x120 [ 40.187098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.187747] ? mtree_range_walk+0x632/0x900 [ 40.188325] ? mas_walk+0x5c7/0x7c0 [ 40.188818] do_vmi_munmap+0x1f1/0x2b0 [ 40.189326] mmap_region+0x1f9/0x2660 [ 40.189825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.190354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.191088] ? __pfx_lock_acquire+0x10/0x10 [ 40.191645] ? __pfx_mmap_region+0x10/0x10 [ 40.192189] ? security_mmap_addr+0x7d/0xa0 [ 40.192743] ? get_unmapped_area+0x1f5/0x3f0 [ 40.193315] do_mmap+0x854/0xf00 [ 40.193774] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.194279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.194858] ksys_mmap_pgoff+0x3af/0x500 [ 40.195385] do_syscall_64+0x3f/0x90 [ 40.195906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.196580] RIP: 0033:0x7f8d1f553d82 [ 40.197056] 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 [ 40.199279] RSP: 002b:00007fff7a5b2dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.200228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d1f553d82 [ 40.201120] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d1e98d000 [ 40.202005] RBP: 00007f8d1e98d000 R08: 0000000000000009 R09: 0000000000001000 [ 40.202894] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecac9d1ec0 [ 40.203781] R13: 00007fff7a5b2de0 R14: 00007fff7a5b2e10 R15: 00007fff7a5b3170 [ 40.204657] [ 40.204961] [ 40.205181] Allocated by task 213: [ 40.205626] kasan_save_stack+0x22/0x50 [ 40.206150] kasan_set_track+0x25/0x30 [ 40.206654] __kasan_slab_alloc+0x59/0x70 [ 40.207200] kmem_cache_alloc+0x16b/0x370 [ 40.207759] vm_area_dup+0x20/0x160 [ 40.208232] __split_vma+0x170/0x950 [ 40.208718] split_vma+0xc6/0x110 [ 40.209177] mprotect_fixup+0x8d2/0xb30 [ 40.209693] do_mprotect_pkey+0x87e/0xd40 [ 40.210238] __x64_sys_mprotect+0x78/0xc0 [ 40.210768] do_syscall_64+0x3f/0x90 [ 40.211261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.211937] [ 40.212157] Freed by task 13: [ 40.212556] kasan_save_stack+0x22/0x50 [ 40.213077] kasan_set_track+0x25/0x30 [ 40.213592] kasan_save_free_info+0x2b/0x50 [ 40.214137] __kasan_slab_free+0x10a/0x190 [ 40.214772] kmem_cache_free+0x10d/0x4d0 [ 40.215300] rcu_core+0x8c8/0x2860 [ 40.215782] __do_softirq+0x1b7/0x7d4 [ 40.216269] [ 40.216489] Last potentially related work creation: [ 40.217090] kasan_save_stack+0x22/0x50 [ 40.217607] __kasan_record_aux_stack+0x8e/0xa0 [ 40.218197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.218863] remove_vma+0x139/0x170 [ 40.219333] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.219918] do_vmi_munmap+0x1f1/0x2b0 [ 40.220422] __vm_munmap+0x138/0x3a0 [ 40.220909] __x64_sys_munmap+0x59/0x80 [ 40.221422] do_syscall_64+0x3f/0x90 [ 40.221911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.222578] [ 40.222804] The buggy address belongs to the object at ffff88801596e658 [ 40.222804] which belongs to the cache vm_area_struct of size 168 [ 40.224350] The buggy address is located 88 bytes inside of [ 40.224350] freed 168-byte region [ffff88801596e658, ffff88801596e700) [ 40.225804] [ 40.226031] The buggy address belongs to the physical page: [ 40.226721] page:000000007f207192 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1596e [ 40.227876] memcg:ffff888010304501 [ 40.228322] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.228988] page_type: 0xffffffff() [ 40.229455] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.230411] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010304501 [ 40.231357] page dumped because: kasan: bad access detected [ 40.232055] [ 40.232284] Memory state around the buggy address: [ 40.232894] ffff88801596e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.233790] ffff88801596e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.234689] >ffff88801596e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.235604] ^ [ 40.236204] ffff88801596e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.237084] ffff88801596e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.238033] ================================================================== [ 40.239019] Disabling lock debugging due to kernel taint [ 42.111648] BUG: Bad rss-counter state mm:00000000e9b89635 type:MM_FILEPAGES val:33 [ 42.112749] BUG: Bad rss-counter state mm:00000000e9b89635 type:MM_ANONPAGES val:22 [ 42.553639] BUG: Bad rss-counter state mm:000000004c43657f type:MM_FILEPAGES val:33 [ 42.554737] BUG: Bad rss-counter state mm:000000004c43657f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46450' (ECDSA) to the list of known hosts. 2023/06/20 03:34:43 fuzzer started 2023/06/20 03:34:43 dialing manager at localhost:44161 2023/06/20 03:34:43 checking machine... 2023/06/20 03:34:43 checking revisions... [ 43.160944] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:34:43 testing simple program... [ 43.207155] cgroup: Unknown subsys name 'net' [ 43.262831] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:34:42 Registers: info registers vcpu 0 RAX=ffff8880168d8001 RBX=ffff8880168d7f40 RCX=ffffffff863b2301 RDX=ffff8880168d7f48 RSI=0000000000000000 RDI=ffff8880168d7718 RBP=ffff8880168d0000 RSP=ffff8880168d7698 R8 =ffffffff863b233c R9 =ffff8880168d7748 R10=0000000000038001 R11=000000000008aa92 R12=ffff8880168d7768 R13=ffff8880168d7750 R14=ffff8880168d7f40 R15=ffff8880168d7708 RIP=ffffffff8113128d RFL=00000287 [--S--PC] 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 00007f337cac1900 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=00007ffed9c31000 CR3=000000000e672000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f04c4c097e0 CR3=000000000d850000 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=2033343a34333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a34333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000