syzkaller login: [ 28.698723] BUG: Bad rss-counter state mm:000000009364470f type:MM_FILEPAGES val:33 [ 28.699752] BUG: Bad rss-counter state mm:000000009364470f type:MM_ANONPAGES val:22 [ 28.875866] ================================================================== [ 28.876862] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.877930] Read of size 8 at addr ffff88800e2b1140 by task sshd/221 [ 28.878901] [ 28.879142] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.880167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.881213] Call Trace: [ 28.881556] <TASK> [ 28.881904] dump_stack_lvl+0x91/0xf0 [ 28.882436] print_report+0xcc/0x620 [ 28.882951] ? __virt_addr_valid+0x102/0x340 [ 28.883540] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.884197] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.884860] kasan_report+0xbe/0xf0 [ 28.885387] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.886100] vma_interval_tree_remove+0xc75/0xec0 [ 28.886775] vma_prepare+0xc54/0x11a0 [ 28.887320] __split_vma+0x5af/0x950 [ 28.887847] ? __pfx___split_vma+0x10/0x10 [ 28.888425] ? find_held_lock+0x2c/0x110 [ 28.889013] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.889640] ? lock_is_held_type+0x9f/0x120 [ 28.890266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.890926] ? mtree_range_walk+0x632/0x900 [ 28.891541] ? mas_walk+0x5c7/0x7c0 [ 28.892064] do_vmi_munmap+0x1f1/0x2b0 [ 28.892594] mmap_region+0x1f9/0x2660 [ 28.893116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.893674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.894472] ? __pfx_lock_acquire+0x10/0x10 [ 28.895050] ? __pfx_mmap_region+0x10/0x10 [ 28.895633] ? security_mmap_addr+0x7d/0xa0 [ 28.896213] ? get_unmapped_area+0x1f5/0x3f0 [ 28.896807] do_mmap+0x854/0xf00 [ 28.897293] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.897867] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.898494] ksys_mmap_pgoff+0x3af/0x500 [ 28.899052] do_syscall_64+0x3f/0x90 [ 28.899586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.900288] RIP: 0033:0x7f6c1d0b7d82 [ 28.900797] 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 [ 28.903155] RSP: 002b:00007ffc40cf7458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.904120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c1d0b7d82 [ 28.905061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c1c4f1000 [ 28.906021] RBP: 00007f6c1c4f1000 R08: 0000000000000009 R09: 0000000000001000 [ 28.906970] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b05b9dfec0 [ 28.907909] R13: 00007ffc40cf7470 R14: 00007ffc40cf74a0 R15: 00007ffc40cf7800 [ 28.908859] </TASK> [ 28.909185] [ 28.909421] Allocated by task 214: [ 28.909937] kasan_save_stack+0x22/0x50 [ 28.910501] kasan_set_track+0x25/0x30 [ 28.911036] __kasan_slab_alloc+0x59/0x70 [ 28.911597] kmem_cache_alloc+0x16b/0x370 [ 28.912160] vm_area_dup+0x20/0x160 [ 28.912648] __split_vma+0x170/0x950 [ 28.913146] split_vma+0xc6/0x110 [ 28.913631] mprotect_fixup+0x8d2/0xb30 [ 28.914222] do_mprotect_pkey+0x87e/0xd40 [ 28.914799] __x64_sys_mprotect+0x78/0xc0 [ 28.915380] do_syscall_64+0x3f/0x90 [ 28.915894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.916604] [ 28.916840] Freed by task 210: [ 28.917267] kasan_save_stack+0x22/0x50 [ 28.917826] kasan_set_track+0x25/0x30 [ 28.918397] kasan_save_free_info+0x2b/0x50 [ 28.918985] __kasan_slab_free+0x10a/0x190 [ 28.919564] kmem_cache_free+0x10d/0x4d0 [ 28.920191] rcu_core+0x8c8/0x2860 [ 28.920661] __do_softirq+0x1b7/0x7d4 [ 28.921171] [ 28.921402] Last potentially related work creation: [ 28.922073] kasan_save_stack+0x22/0x50 [ 28.922632] __kasan_record_aux_stack+0x8e/0xa0 [ 28.923255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.923964] remove_vma+0x139/0x170 [ 28.924450] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.925055] do_vmi_munmap+0x1f1/0x2b0 [ 28.925585] __vm_munmap+0x138/0x3a0 [ 28.926109] __x64_sys_munmap+0x59/0x80 [ 28.926655] do_syscall_64+0x3f/0x90 [ 28.927180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927896] [ 28.928129] Second to last potentially related work creation: [ 28.928876] kasan_save_stack+0x22/0x50 [ 28.929437] __kasan_record_aux_stack+0x8e/0xa0 [ 28.930105] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.930806] remove_vma+0x139/0x170 [ 28.931307] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.931921] do_vmi_munmap+0x1f1/0x2b0 [ 28.932457] mmap_region+0x1f9/0x2660 [ 28.932982] do_mmap+0x854/0xf00 [ 28.933460] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.934028] ksys_mmap_pgoff+0x3af/0x500 [ 28.934585] do_syscall_64+0x3f/0x90 [ 28.935112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.935825] [ 28.936062] The buggy address belongs to the object at ffff88800e2b10e8 [ 28.936062] which belongs to the cache vm_area_struct of size 168 [ 28.937694] The buggy address is located 88 bytes inside of [ 28.937694] freed 168-byte region [ffff88800e2b10e8, ffff88800e2b1190) [ 28.939287] [ 28.939523] The buggy address belongs to the physical page: [ 28.940254] page:00000000577e4e62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2b1 [ 28.941446] memcg:ffff88800f029701 [ 28.941944] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.942720] page_type: 0xffffffff() [ 28.943220] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a6e00 dead000000000007 [ 28.944235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f029701 [ 28.945239] page dumped because: kasan: bad access detected [ 28.946006] [ 28.946242] Memory state around the buggy address: [ 28.946882] ffff88800e2b1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.947826] ffff88800e2b1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.948755] >ffff88800e2b1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.949689] ^ [ 28.950421] ffff88800e2b1180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 28.951362] ffff88800e2b1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.952286] ================================================================== [ 28.953297] Disabling lock debugging due to kernel taint [ 31.317200] BUG: Bad rss-counter state mm:00000000d5ff360f type:MM_FILEPAGES val:33 [ 31.318692] BUG: Bad rss-counter state mm:00000000d5ff360f type:MM_ANONPAGES val:22 [ 31.800907] BUG: Bad rss-counter state mm:000000002d59c98c type:MM_FILEPAGES val:33 [ 31.801949] BUG: Bad rss-counter state mm:000000002d59c98c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32034' (ECDSA) to the list of known hosts. 2023/06/21 06:57:14 fuzzer started 2023/06/21 06:57:14 dialing manager at localhost:36067 2023/06/21 06:57:14 checking machine... 2023/06/21 06:57:14 checking revisions... [ 32.536069] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:57:14 testing simple program... [ 32.585791] cgroup: Unknown subsys name 'net' [ 32.630424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:57:14 Registers: info registers vcpu 0 RAX=ffffffff86139745 RBX=0000000000000001 RCX=ffffffff86139744 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff86139748 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fcd8 R15=ffff888008d9f978 RIP=ffffffff81130b99 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 0000000000000000 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=00007f239c56aa30 CR3=000000000cc9a000 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=37353a3630203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303434 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff2fc8 RBX=ffff888009a0f6a8 RCX=ffffffff83ab193d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f97e40 RBP=ffffffff87f97e40 RSP=ffff8880166f7508 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=000008a1000008a1 R12=0000000000000000 R13=00000000000000d5 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1949 RFL=00000212 [----A--] 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 00007fbc7c0e4900 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=00007ffe51329000 CR3=000000000f29c000 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=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