syzkaller login: [ 38.733781] BUG: Bad rss-counter state mm:00000000797f3c46 type:MM_FILEPAGES val:33 [ 38.735108] BUG: Bad rss-counter state mm:00000000797f3c46 type:MM_ANONPAGES val:22 [ 38.902604] ================================================================== [ 38.903535] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.904465] Read of size 8 at addr ffff888019ad2df0 by task sshd/219 [ 38.905341] [ 38.905568] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.906442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.907418] Call Trace: [ 38.907734] [ 38.908011] dump_stack_lvl+0x91/0xf0 [ 38.908496] print_report+0xcc/0x620 [ 38.908970] ? __virt_addr_valid+0x102/0x340 [ 38.909514] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.910150] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.910755] kasan_report+0xbe/0xf0 [ 38.911235] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.911864] vma_interval_tree_remove+0xc75/0xec0 [ 38.912467] vma_prepare+0xc54/0x11a0 [ 38.912940] __split_vma+0x5af/0x950 [ 38.913403] ? __pfx___split_vma+0x10/0x10 [ 38.913931] ? find_held_lock+0x2c/0x110 [ 38.914441] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.915004] ? lock_is_held_type+0x9f/0x120 [ 38.915537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.916133] ? mtree_range_walk+0x632/0x900 [ 38.916683] ? mas_walk+0x5c7/0x7c0 [ 38.917153] do_vmi_munmap+0x1f1/0x2b0 [ 38.917653] mmap_region+0x1f9/0x2660 [ 38.918129] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.918633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.919338] ? __pfx_lock_acquire+0x10/0x10 [ 38.919858] ? __pfx_mmap_region+0x10/0x10 [ 38.920379] ? security_mmap_addr+0x7d/0xa0 [ 38.920898] ? get_unmapped_area+0x1f5/0x3f0 [ 38.921446] do_mmap+0x854/0xf00 [ 38.921898] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.922391] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.922948] ksys_mmap_pgoff+0x3af/0x500 [ 38.923448] do_syscall_64+0x3f/0x90 [ 38.923918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924560] RIP: 0033:0x7f217771dd82 [ 38.925007] 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 [ 38.927098] RSP: 002b:00007ffdeffa1918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.927999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f217771dd82 [ 38.928834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2176b57000 [ 38.929689] RBP: 00007f2176b57000 R08: 0000000000000009 R09: 0000000000001000 [ 38.930518] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee6acd7ec0 [ 38.931358] R13: 00007ffdeffa1930 R14: 00007ffdeffa1960 R15: 00007ffdeffa1cc0 [ 38.932210] [ 38.932498] [ 38.932713] Allocated by task 212: [ 38.933134] kasan_save_stack+0x22/0x50 [ 38.933650] kasan_set_track+0x25/0x30 [ 38.934149] __kasan_slab_alloc+0x59/0x70 [ 38.934683] kmem_cache_alloc+0x16b/0x370 [ 38.935202] vm_area_dup+0x20/0x160 [ 38.935657] __split_vma+0x170/0x950 [ 38.936128] split_vma+0xc6/0x110 [ 38.936564] mprotect_fixup+0x8d2/0xb30 [ 38.937061] do_mprotect_pkey+0x87e/0xd40 [ 38.937583] __x64_sys_mprotect+0x78/0xc0 [ 38.938098] do_syscall_64+0x3f/0x90 [ 38.938564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939196] [ 38.939407] Freed by task 212: [ 38.939794] kasan_save_stack+0x22/0x50 [ 38.940287] kasan_set_track+0x25/0x30 [ 38.940773] kasan_save_free_info+0x2b/0x50 [ 38.941296] __kasan_slab_free+0x10a/0x190 [ 38.941834] kmem_cache_free+0x10d/0x4d0 [ 38.942337] rcu_core+0x8c8/0x2860 [ 38.942778] __do_softirq+0x1b7/0x7d4 [ 38.943252] [ 38.943463] Last potentially related work creation: [ 38.944038] kasan_save_stack+0x22/0x50 [ 38.944544] __kasan_record_aux_stack+0x8e/0xa0 [ 38.945108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.945761] remove_vma+0x139/0x170 [ 38.946208] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.946768] do_vmi_munmap+0x1f1/0x2b0 [ 38.947247] __vm_munmap+0x138/0x3a0 [ 38.947715] __x64_sys_munmap+0x59/0x80 [ 38.948213] do_syscall_64+0x3f/0x90 [ 38.948681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949318] [ 38.949529] The buggy address belongs to the object at ffff888019ad2d98 [ 38.949529] which belongs to the cache vm_area_struct of size 168 [ 38.950996] The buggy address is located 88 bytes inside of [ 38.950996] freed 168-byte region [ffff888019ad2d98, ffff888019ad2e40) [ 38.952370] [ 38.952582] The buggy address belongs to the physical page: [ 38.953226] page:00000000d62802f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ad2 [ 38.954321] memcg:ffff88800fcc8501 [ 38.954738] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.955381] page_type: 0xffffffff() [ 38.955829] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.956735] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcc8501 [ 38.957635] page dumped because: kasan: bad access detected [ 38.958284] [ 38.958497] Memory state around the buggy address: [ 38.959074] ffff888019ad2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.959907] ffff888019ad2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.960750] >ffff888019ad2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.961600] ^ [ 38.962391] ffff888019ad2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.963231] ffff888019ad2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.964079] ================================================================== [ 38.965104] Disabling lock debugging due to kernel taint [ 40.847605] BUG: Bad rss-counter state mm:000000008f68889e type:MM_FILEPAGES val:33 [ 40.848597] BUG: Bad rss-counter state mm:000000008f68889e type:MM_ANONPAGES val:22 [ 41.392428] BUG: Bad rss-counter state mm:00000000378cefc9 type:MM_FILEPAGES val:33 [ 41.393596] BUG: Bad rss-counter state mm:00000000378cefc9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5330' (ECDSA) to the list of known hosts. 2023/06/21 07:28:07 fuzzer started 2023/06/21 07:28:07 dialing manager at localhost:36067 2023/06/21 07:28:07 checking machine... 2023/06/21 07:28:07 checking revisions... [ 42.032637] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:28:07 testing simple program... [ 42.076484] cgroup: Unknown subsys name 'net' [ 42.149030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:28:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014647a20 RCX=ffff888014647a28 RDX=1ffff110028c8f31 RSI=ffff888014647958 RDI=ffff888014647988 RBP=dffffc0000000000 RSP=ffff8880146478c8 R8 =0000000000000001 R9 =ffff8880146479c8 R10=0000000000038001 R11=0000000000006097 R12=ffffed10028c8f33 R13=ffffed10028c8f32 R14=ffff8880146479d0 R15=ffff888014647988 RIP=ffffffff811305fa RFL=00000292 [--S-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 00007f3be54a0900 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=00007fbeb6f59650 CR3=000000000caa4000 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=338e0f035ef6ea4400000000000ae988 XMM05=425c10083367fe660000000000132220 XMM06=dfcdbad4f1609c370000000000130d48 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=0000000000000001 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=00007fffb412c478 CR3=0000000018d32000 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=2037303a38323a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a38323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000