syzkaller login: [ 31.564087] BUG: Bad rss-counter state mm:00000000f57a2d08 type:MM_FILEPAGES val:33 [ 31.565284] BUG: Bad rss-counter state mm:00000000f57a2d08 type:MM_ANONPAGES val:22 [ 31.601889] ================================================================== [ 31.602435] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.603006] Read of size 8 at addr ffff88800e008058 by task sshd/220 [ 31.603476] [ 31.603605] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.604126] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.604723] Call Trace: [ 31.604899] [ 31.605055] dump_stack_lvl+0x91/0xf0 [ 31.605335] print_report+0xcc/0x620 [ 31.605653] ? __virt_addr_valid+0x102/0x340 [ 31.605954] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.606353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.606695] kasan_report+0xbe/0xf0 [ 31.606999] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.607346] vma_interval_tree_remove+0xc75/0xec0 [ 31.607742] vma_prepare+0xc54/0x11a0 [ 31.608005] __split_vma+0x5af/0x950 [ 31.608332] ? __pfx___split_vma+0x10/0x10 [ 31.608622] ? find_held_lock+0x2c/0x110 [ 31.608962] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.609279] ? lock_is_held_type+0x9f/0x120 [ 31.609629] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.609958] ? mtree_range_walk+0x632/0x900 [ 31.610317] ? mas_walk+0x5c7/0x7c0 [ 31.610584] do_vmi_munmap+0x1f1/0x2b0 [ 31.610875] mmap_region+0x1f9/0x2660 [ 31.611157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.611454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.611904] ? __pfx_lock_acquire+0x10/0x10 [ 31.612195] ? __pfx_mmap_region+0x10/0x10 [ 31.612532] ? security_mmap_addr+0x7d/0xa0 [ 31.612824] ? get_unmapped_area+0x1f5/0x3f0 [ 31.613171] do_mmap+0x854/0xf00 [ 31.613423] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.613702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.614050] ksys_mmap_pgoff+0x3af/0x500 [ 31.614334] do_syscall_64+0x3f/0x90 [ 31.614603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.614957] RIP: 0033:0x7fc63bc82d82 [ 31.615244] 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 [ 31.616468] RSP: 002b:00007fffe4c04e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.616959] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc63bc82d82 [ 31.617430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc63b0bc000 [ 31.617897] RBP: 00007fc63b0bc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.618363] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8b015ef60 [ 31.618829] R13: 00007fffe4c04e80 R14: 00007fffe4c04eb0 R15: 00007fffe4c05210 [ 31.619298] [ 31.619468] [ 31.619604] Allocated by task 213: [ 31.619845] kasan_save_stack+0x22/0x50 [ 31.620121] kasan_set_track+0x25/0x30 [ 31.620397] __kasan_slab_alloc+0x59/0x70 [ 31.620686] kmem_cache_alloc+0x16b/0x370 [ 31.620974] vm_area_dup+0x20/0x160 [ 31.621224] __split_vma+0x170/0x950 [ 31.621487] split_vma+0xc6/0x110 [ 31.621734] mprotect_fixup+0x8d2/0xb30 [ 31.622009] do_mprotect_pkey+0x87e/0xd40 [ 31.622297] __x64_sys_mprotect+0x78/0xc0 [ 31.622593] do_syscall_64+0x3f/0x90 [ 31.622854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.623206] [ 31.623328] Freed by task 13: [ 31.623546] kasan_save_stack+0x22/0x50 [ 31.623835] kasan_set_track+0x25/0x30 [ 31.624105] kasan_save_free_info+0x2b/0x50 [ 31.624396] __kasan_slab_free+0x10a/0x190 [ 31.624700] kmem_cache_free+0x10d/0x4d0 [ 31.624981] rcu_core+0x8c8/0x2860 [ 31.625227] __do_softirq+0x1b7/0x7d4 [ 31.625499] [ 31.625622] Last potentially related work creation: [ 31.625946] kasan_save_stack+0x22/0x50 [ 31.626222] __kasan_record_aux_stack+0x8e/0xa0 [ 31.626546] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.626904] remove_vma+0x139/0x170 [ 31.627155] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.627466] do_vmi_munmap+0x1f1/0x2b0 [ 31.627747] __vm_munmap+0x138/0x3a0 [ 31.628007] __x64_sys_munmap+0x59/0x80 [ 31.628280] do_syscall_64+0x3f/0x90 [ 31.628551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.628907] [ 31.629028] Second to last potentially related work creation: [ 31.629397] kasan_save_stack+0x22/0x50 [ 31.629678] __kasan_record_aux_stack+0x8e/0xa0 [ 31.629991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.630338] remove_vma+0x139/0x170 [ 31.630589] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.630891] do_vmi_munmap+0x1f1/0x2b0 [ 31.631158] mmap_region+0x1f9/0x2660 [ 31.631418] do_mmap+0x854/0xf00 [ 31.631667] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.631935] ksys_mmap_pgoff+0x3af/0x500 [ 31.632211] do_syscall_64+0x3f/0x90 [ 31.632469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.632828] [ 31.632947] The buggy address belongs to the object at ffff88800e008000 [ 31.632947] which belongs to the cache vm_area_struct of size 168 [ 31.633750] The buggy address is located 88 bytes inside of [ 31.633750] freed 168-byte region [ffff88800e008000, ffff88800e0080a8) [ 31.634504] [ 31.634630] The buggy address belongs to the physical page: [ 31.634988] page:000000005c6c560b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe008 [ 31.635578] memcg:ffff88800df75201 [ 31.635831] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.636181] page_type: 0xffffffff() [ 31.636425] raw: 0100000000000200 ffff8880087a0c80 ffffea000037e180 dead000000000006 [ 31.636930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df75201 [ 31.637452] page dumped because: kasan: bad access detected [ 31.637826] [ 31.637944] Memory state around the buggy address: [ 31.638262] ffff88800e007f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.638734] ffff88800e007f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.639201] >ffff88800e008000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.639690] ^ [ 31.640086] ffff88800e008080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.640550] ffff88800e008100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.641013] ================================================================== [ 31.641497] Disabling lock debugging due to kernel taint [ 33.368566] BUG: Bad rss-counter state mm:000000004e2a9774 type:MM_FILEPAGES val:33 [ 33.369183] BUG: Bad rss-counter state mm:000000004e2a9774 type:MM_ANONPAGES val:22 [ 33.725426] BUG: Bad rss-counter state mm:000000004f40325e type:MM_FILEPAGES val:33 [ 33.726211] BUG: Bad rss-counter state mm:000000004f40325e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61209' (ECDSA) to the list of known hosts. 2023/06/20 16:20:37 fuzzer started 2023/06/20 16:20:37 dialing manager at localhost:36067 2023/06/20 16:20:37 checking machine... 2023/06/20 16:20:37 checking revisions... [ 34.419094] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:20:38 testing simple program... [ 34.460042] cgroup: Unknown subsys name 'net' [ 34.517689] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:20:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f70d6a41570 CR3=000000000db56000 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=2037333a30323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a30323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888017ed6f98 RCX=0000000000000001 RDX=1ffff11002fdadf4 RSI=ffff888017ed74a8 RDI=ffff888017ed6fa0 RBP=ffff888017ed74a8 RSP=ffff888017ed6ef0 R8 =ffffffff864aa4f4 R9 =ffff888017ed6fd8 R10=0000000000038001 R11=00000000000b3bfc R12=0000000000000008 R13=ffff888017ed6fe0 R14=ffff888017ed74b0 R15=ffff888017ed6f98 RIP=ffffffff81130445 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 00007f653f546900 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=00007f653f525020 CR3=00000000164a2000 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=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