syzkaller login: [ 38.700896] BUG: Bad rss-counter state mm:0000000008ed8f75 type:MM_FILEPAGES val:33 [ 38.701924] BUG: Bad rss-counter state mm:0000000008ed8f75 type:MM_ANONPAGES val:22 [ 38.870804] ================================================================== [ 38.871669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.872557] Read of size 8 at addr ffff88800d6255c8 by task sshd/219 [ 38.873281] [ 38.873493] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.874485] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.875390] Call Trace: [ 38.875692] [ 38.875959] dump_stack_lvl+0x91/0xf0 [ 38.876450] print_report+0xcc/0x620 [ 38.876908] ? __virt_addr_valid+0x102/0x340 [ 38.877446] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878051] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878660] kasan_report+0xbe/0xf0 [ 38.879137] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879750] vma_interval_tree_remove+0xc75/0xec0 [ 38.880345] vma_prepare+0xc54/0x11a0 [ 38.880828] __split_vma+0x5af/0x950 [ 38.881289] ? __pfx___split_vma+0x10/0x10 [ 38.881806] ? find_held_lock+0x2c/0x110 [ 38.882310] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.882861] ? lock_is_held_type+0x9f/0x120 [ 38.883390] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.883991] ? mtree_range_walk+0x632/0x900 [ 38.884544] ? mas_walk+0x5c7/0x7c0 [ 38.885017] do_vmi_munmap+0x1f1/0x2b0 [ 38.885511] mmap_region+0x1f9/0x2660 [ 38.885986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.886491] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.887205] ? __pfx_lock_acquire+0x10/0x10 [ 38.887725] ? __pfx_mmap_region+0x10/0x10 [ 38.888276] ? security_mmap_addr+0x7d/0xa0 [ 38.888797] ? get_unmapped_area+0x1f5/0x3f0 [ 38.889339] do_mmap+0x854/0xf00 [ 38.889777] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.890266] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.890820] ksys_mmap_pgoff+0x3af/0x500 [ 38.891322] do_syscall_64+0x3f/0x90 [ 38.891795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.892452] RIP: 0033:0x7f9a99b44d82 [ 38.892899] 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 [ 38.894994] RSP: 002b:00007ffccb2cd398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.895898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a99b44d82 [ 38.896754] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a98f7e000 [ 38.897603] RBP: 00007f9a98f7e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.898429] R10: 0000000000000812 R11: 0000000000000206 R12: 000056174d9ffec0 [ 38.899277] R13: 00007ffccb2cd3b0 R14: 00007ffccb2cd3e0 R15: 00007ffccb2cd740 [ 38.900128] [ 38.900423] [ 38.900632] Allocated by task 212: [ 38.901053] kasan_save_stack+0x22/0x50 [ 38.901547] kasan_set_track+0x25/0x30 [ 38.902039] __kasan_slab_alloc+0x59/0x70 [ 38.902566] kmem_cache_alloc+0x16b/0x370 [ 38.903070] vm_area_dup+0x20/0x160 [ 38.903521] __split_vma+0x170/0x950 [ 38.903990] split_vma+0xc6/0x110 [ 38.904443] mprotect_fixup+0x8d2/0xb30 [ 38.904934] do_mprotect_pkey+0x87e/0xd40 [ 38.905445] __x64_sys_mprotect+0x78/0xc0 [ 38.905970] do_syscall_64+0x3f/0x90 [ 38.906444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.907076] [ 38.907286] Freed by task 212: [ 38.907676] kasan_save_stack+0x22/0x50 [ 38.908183] kasan_set_track+0x25/0x30 [ 38.908669] kasan_save_free_info+0x2b/0x50 [ 38.909192] __kasan_slab_free+0x10a/0x190 [ 38.909723] kmem_cache_free+0x10d/0x4d0 [ 38.910229] rcu_core+0x8c8/0x2860 [ 38.910680] __do_softirq+0x1b7/0x7d4 [ 38.911152] [ 38.911364] Last potentially related work creation: [ 38.911946] kasan_save_stack+0x22/0x50 [ 38.912457] __kasan_record_aux_stack+0x8e/0xa0 [ 38.913024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.913657] remove_vma+0x139/0x170 [ 38.914102] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.914649] do_vmi_munmap+0x1f1/0x2b0 [ 38.915228] __vm_munmap+0x138/0x3a0 [ 38.915701] __x64_sys_munmap+0x59/0x80 [ 38.916197] do_syscall_64+0x3f/0x90 [ 38.916673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917311] [ 38.917528] The buggy address belongs to the object at ffff88800d625570 [ 38.917528] which belongs to the cache vm_area_struct of size 168 [ 38.918983] The buggy address is located 88 bytes inside of [ 38.918983] freed 168-byte region [ffff88800d625570, ffff88800d625618) [ 38.920377] [ 38.920595] The buggy address belongs to the physical page: [ 38.921242] page:000000006446ffeb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd625 [ 38.922317] memcg:ffff888013fc0901 [ 38.922736] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.923428] page_type: 0xffffffff() [ 38.923879] raw: 0100000000000200 ffff8880087a0c80 ffffea0000372a40 dead000000000005 [ 38.924822] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fc0901 [ 38.925745] page dumped because: kasan: bad access detected [ 38.926400] [ 38.926613] Memory state around the buggy address: [ 38.927188] ffff88800d625480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.928043] ffff88800d625500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.928920] >ffff88800d625580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.929764] ^ [ 38.930425] ffff88800d625600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.931282] ffff88800d625680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.932133] ================================================================== [ 38.933056] Disabling lock debugging due to kernel taint [ 40.893544] BUG: Bad rss-counter state mm:0000000017645776 type:MM_FILEPAGES val:33 [ 40.894671] BUG: Bad rss-counter state mm:0000000017645776 type:MM_ANONPAGES val:22 [ 41.319025] BUG: Bad rss-counter state mm:00000000a2c4d9d8 type:MM_FILEPAGES val:33 [ 41.319749] BUG: Bad rss-counter state mm:00000000a2c4d9d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48886' (ECDSA) to the list of known hosts. 2023/06/21 01:31:18 fuzzer started 2023/06/21 01:31:18 dialing manager at localhost:36067 2023/06/21 01:31:18 checking machine... 2023/06/21 01:31:18 checking revisions... [ 41.979775] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:31:18 testing simple program... [ 42.026774] cgroup: Unknown subsys name 'net' [ 42.065412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:31:18 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=00007ffcce87bc28 CR3=000000000e282000 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=2038313a31333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a31333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfcbd RBX=ffffffff85dfe5ec RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5d0 RSP=ffff88806cf099e0 R8 =ffffffff8613971a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe608 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5d0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fd7405b2900 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=00007fd740591020 CR3=000000000c638000 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