syzkaller login: [ 35.507607] BUG: Bad rss-counter state mm:00000000ca64fa9b type:MM_FILEPAGES val:33 [ 35.509425] BUG: Bad rss-counter state mm:00000000ca64fa9b type:MM_ANONPAGES val:22 [ 35.656442] ================================================================== [ 35.657204] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.657976] Read of size 8 at addr ffff88800fe62798 by task sshd/220 [ 35.658609] [ 35.658794] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.659634] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.660472] Call Trace: [ 35.660737] [ 35.660970] dump_stack_lvl+0x91/0xf0 [ 35.661373] print_report+0xcc/0x620 [ 35.661794] ? __virt_addr_valid+0x102/0x340 [ 35.662254] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.662764] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.663278] kasan_report+0xbe/0xf0 [ 35.663673] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.664189] vma_interval_tree_remove+0xc75/0xec0 [ 35.664701] vma_prepare+0xc54/0x11a0 [ 35.665099] __split_vma+0x5af/0x950 [ 35.665491] ? __pfx___split_vma+0x10/0x10 [ 35.665926] ? find_held_lock+0x2c/0x110 [ 35.666362] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.666825] ? lock_is_held_type+0x9f/0x120 [ 35.667275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.667782] ? mtree_range_walk+0x632/0x900 [ 35.668243] ? mas_walk+0x5c7/0x7c0 [ 35.668650] do_vmi_munmap+0x1f1/0x2b0 [ 35.669057] mmap_region+0x1f9/0x2660 [ 35.669458] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.669883] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.670462] ? __pfx_lock_acquire+0x10/0x10 [ 35.670903] ? __pfx_mmap_region+0x10/0x10 [ 35.671341] ? security_mmap_addr+0x7d/0xa0 [ 35.671778] ? get_unmapped_area+0x1f5/0x3f0 [ 35.672233] do_mmap+0x854/0xf00 [ 35.672620] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.673028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.673489] ksys_mmap_pgoff+0x3af/0x500 [ 35.673914] do_syscall_64+0x3f/0x90 [ 35.674306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.674843] RIP: 0033:0x7f3d6bfded82 [ 35.675219] 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 [ 35.676973] RSP: 002b:00007ffec2610e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.677725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d6bfded82 [ 35.678424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d6b418000 [ 35.679121] RBP: 00007f3d6b418000 R08: 0000000000000009 R09: 0000000000001000 [ 35.679822] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e79e032ec0 [ 35.680703] R13: 00007ffec2610e50 R14: 00007ffec2610e80 R15: 00007ffec26111e0 [ 35.681574] [ 35.681867] [ 35.682083] Allocated by task 213: [ 35.682510] kasan_save_stack+0x22/0x50 [ 35.683020] kasan_set_track+0x25/0x30 [ 35.683514] __kasan_slab_alloc+0x59/0x70 [ 35.684036] kmem_cache_alloc+0x16b/0x370 [ 35.684609] vm_area_dup+0x20/0x160 [ 35.685170] __split_vma+0x170/0x950 [ 35.685750] split_vma+0xc6/0x110 [ 35.686289] mprotect_fixup+0x8d2/0xb30 [ 35.686901] do_mprotect_pkey+0x87e/0xd40 [ 35.687541] __x64_sys_mprotect+0x78/0xc0 [ 35.688181] do_syscall_64+0x3f/0x90 [ 35.688777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.689564] [ 35.689826] Freed by task 213: [ 35.690308] kasan_save_stack+0x22/0x50 [ 35.690919] kasan_set_track+0x25/0x30 [ 35.691532] kasan_save_free_info+0x2b/0x50 [ 35.692184] __kasan_slab_free+0x10a/0x190 [ 35.692843] kmem_cache_free+0x10d/0x4d0 [ 35.693472] rcu_core+0x8c8/0x2860 [ 35.694019] __do_softirq+0x1b7/0x7d4 [ 35.694606] [ 35.694871] Last potentially related work creation: [ 35.695593] kasan_save_stack+0x22/0x50 [ 35.696208] __kasan_record_aux_stack+0x8e/0xa0 [ 35.696851] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.697491] remove_vma+0x139/0x170 [ 35.697950] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.698502] do_vmi_munmap+0x1f1/0x2b0 [ 35.698983] __vm_munmap+0x138/0x3a0 [ 35.699452] __x64_sys_munmap+0x59/0x80 [ 35.699950] do_syscall_64+0x3f/0x90 [ 35.700426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.701069] [ 35.701284] The buggy address belongs to the object at ffff88800fe62740 [ 35.701284] which belongs to the cache vm_area_struct of size 168 [ 35.702752] The buggy address is located 88 bytes inside of [ 35.702752] freed 168-byte region [ffff88800fe62740, ffff88800fe627e8) [ 35.704154] [ 35.704375] The buggy address belongs to the physical page: [ 35.705036] page:00000000a08349c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe62 [ 35.706115] memcg:ffff88800cff1801 [ 35.706540] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.707187] page_type: 0xffffffff() [ 35.707632] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.708564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cff1801 [ 35.709467] page dumped because: kasan: bad access detected [ 35.710123] [ 35.710337] Memory state around the buggy address: [ 35.710916] ffff88800fe62680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.711763] ffff88800fe62700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.712618] >ffff88800fe62780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.713466] ^ [ 35.713953] ffff88800fe62800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.714796] ffff88800fe62880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.715648] ================================================================== [ 35.716721] Disabling lock debugging due to kernel taint [ 37.458541] BUG: Bad rss-counter state mm:000000004a3e0d6d type:MM_FILEPAGES val:33 [ 37.459676] BUG: Bad rss-counter state mm:000000004a3e0d6d type:MM_ANONPAGES val:22 [ 37.922561] BUG: Bad rss-counter state mm:00000000a9f7cae3 type:MM_FILEPAGES val:33 [ 37.924011] BUG: Bad rss-counter state mm:00000000a9f7cae3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61118' (ECDSA) to the list of known hosts. 2023/06/19 23:30:06 fuzzer started 2023/06/19 23:30:06 dialing manager at localhost:44161 2023/06/19 23:30:06 checking machine... 2023/06/19 23:30:06 checking revisions... [ 38.673785] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:30:06 testing simple program... [ 38.728201] cgroup: Unknown subsys name 'net' [ 38.769897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:30:01 Registers: info registers vcpu 0 RAX=1ffffffff0c26ee7 RBX=0000000000000001 RCX=ffffffff86137736 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86137738 RBP=ffff888019407930 RSP=ffff888019407868 R8 =ffffffff8613773a R9 =ffff888019407918 R10=0000000000038001 R11=0000000000020de7 R12=ffff888019407938 R13=ffff888019407920 R14=ffff888019407c60 R15=ffff8880194078d8 RIP=ffffffff811311c7 RFL=00000216 [----AP-] 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 00007fec996c2900 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=00007ffc0a673000 CR3=000000000ebc2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=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=00007ffe060b89b8 CR3=00000000147e0000 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=2035303a30333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000