syzkaller login: [ 30.730858] BUG: Bad rss-counter state mm:000000006028590c type:MM_FILEPAGES val:33 [ 30.732320] BUG: Bad rss-counter state mm:000000006028590c type:MM_ANONPAGES val:22 [ 30.911450] ================================================================== [ 30.912357] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.913291] Read of size 8 at addr ffff888018797d08 by task sshd/219 [ 30.914174] [ 30.914396] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.915289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.916278] Call Trace: [ 30.916605] [ 30.916893] dump_stack_lvl+0x91/0xf0 [ 30.917380] print_report+0xcc/0x620 [ 30.917874] ? __virt_addr_valid+0x102/0x340 [ 30.918432] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.919059] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.919670] kasan_report+0xbe/0xf0 [ 30.920156] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.920788] vma_interval_tree_remove+0xc75/0xec0 [ 30.921398] vma_prepare+0xc54/0x11a0 [ 30.921884] __split_vma+0x5af/0x950 [ 30.922358] ? __pfx___split_vma+0x10/0x10 [ 30.922911] ? find_held_lock+0x2c/0x110 [ 30.923447] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.924020] ? lock_is_held_type+0x9f/0x120 [ 30.924569] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.925182] ? mtree_range_walk+0x632/0x900 [ 30.925743] ? mas_walk+0x5c7/0x7c0 [ 30.926229] do_vmi_munmap+0x1f1/0x2b0 [ 30.926747] mmap_region+0x1f9/0x2660 [ 30.927242] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.927758] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.928478] ? __pfx_lock_acquire+0x10/0x10 [ 30.929020] ? __pfx_mmap_region+0x10/0x10 [ 30.929558] ? security_mmap_addr+0x7d/0xa0 [ 30.930095] ? get_unmapped_area+0x1f5/0x3f0 [ 30.930661] do_mmap+0x854/0xf00 [ 30.931103] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.931607] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.932178] ksys_mmap_pgoff+0x3af/0x500 [ 30.932696] do_syscall_64+0x3f/0x90 [ 30.933179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.933836] RIP: 0033:0x7fa5669efd82 [ 30.934302] 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 [ 30.936490] RSP: 002b:00007ffd2c877528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.937400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5669efd82 [ 30.938262] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa565e29000 [ 30.939132] RBP: 00007fa565e29000 R08: 0000000000000009 R09: 0000000000001000 [ 30.939993] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627bbb19f70 [ 30.940846] R13: 00007ffd2c877540 R14: 00007ffd2c877570 R15: 00007ffd2c8778d0 [ 30.941713] [ 30.942010] [ 30.942229] Allocated by task 212: [ 30.942692] kasan_save_stack+0x22/0x50 [ 30.943198] kasan_set_track+0x25/0x30 [ 30.943701] __kasan_slab_alloc+0x59/0x70 [ 30.944235] kmem_cache_alloc+0x16b/0x370 [ 30.944759] vm_area_dup+0x20/0x160 [ 30.945223] __split_vma+0x170/0x950 [ 30.945697] split_vma+0xc6/0x110 [ 30.946137] mprotect_fixup+0x8d2/0xb30 [ 30.946661] do_mprotect_pkey+0x87e/0xd40 [ 30.947186] __x64_sys_mprotect+0x78/0xc0 [ 30.947717] do_syscall_64+0x3f/0x90 [ 30.948197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.948849] [ 30.949068] Freed by task 212: [ 30.949472] kasan_save_stack+0x22/0x50 [ 30.949984] kasan_set_track+0x25/0x30 [ 30.950487] kasan_save_free_info+0x2b/0x50 [ 30.951029] __kasan_slab_free+0x10a/0x190 [ 30.951569] kmem_cache_free+0x10d/0x4d0 [ 30.952084] rcu_core+0x8c8/0x2860 [ 30.952538] __do_softirq+0x1b7/0x7d4 [ 30.953017] [ 30.953236] Last potentially related work creation: [ 30.953824] kasan_save_stack+0x22/0x50 [ 30.954321] __kasan_record_aux_stack+0x8e/0xa0 [ 30.954919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.955568] remove_vma+0x139/0x170 [ 30.956025] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.956589] do_vmi_munmap+0x1f1/0x2b0 [ 30.957082] __vm_munmap+0x138/0x3a0 [ 30.957554] __x64_sys_munmap+0x59/0x80 [ 30.958058] do_syscall_64+0x3f/0x90 [ 30.958561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.959207] [ 30.959429] The buggy address belongs to the object at ffff888018797cb0 [ 30.959429] which belongs to the cache vm_area_struct of size 168 [ 30.960908] The buggy address is located 88 bytes inside of [ 30.960908] freed 168-byte region [ffff888018797cb0, ffff888018797d58) [ 30.962394] [ 30.962639] The buggy address belongs to the physical page: [ 30.963322] page:000000008e395342 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18797 [ 30.964418] memcg:ffff88800f5b4501 [ 30.964855] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.965505] page_type: 0xffffffff() [ 30.965957] raw: 0100000000000200 ffff8880087a0c80 ffffea0000376e80 dead000000000002 [ 30.966895] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5b4501 [ 30.967809] page dumped because: kasan: bad access detected [ 30.968480] [ 30.968698] Memory state around the buggy address: [ 30.969310] ffff888018797c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.970169] ffff888018797c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.971051] >ffff888018797d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.971917] ^ [ 30.972366] ffff888018797d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.973230] ffff888018797e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.974094] ================================================================== [ 30.975140] Disabling lock debugging due to kernel taint [ 32.940383] BUG: Bad rss-counter state mm:0000000061171d71 type:MM_FILEPAGES val:33 [ 32.941442] BUG: Bad rss-counter state mm:0000000061171d71 type:MM_ANONPAGES val:22 [ 33.432036] BUG: Bad rss-counter state mm:000000003a61d6ae type:MM_FILEPAGES val:33 [ 33.432731] BUG: Bad rss-counter state mm:000000003a61d6ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60399' (ECDSA) to the list of known hosts. 2023/06/21 10:14:58 fuzzer started 2023/06/21 10:14:58 dialing manager at localhost:36067 2023/06/21 10:14:58 checking machine... 2023/06/21 10:14:58 checking revisions... [ 34.148469] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:14:59 testing simple program... [ 34.206060] cgroup: Unknown subsys name 'net' [ 34.257635] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:14:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c57f768 RCX=ffffffff844bda3f RDX=ffff888017713680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800c57f9cc RSP=ffff88800c57f170 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff88800e1852b8 R12=0000000000000000 R13=00007fa8cf07c000 R14=dffffc0000000000 R15=000000000000000d RIP=ffffffff814c027c 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 00007fa8cf0c9900 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=00007fa8cf08e008 CR3=000000000efd8000 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=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 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=ffff888008c04400 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=00007f57152cc4d0 CR3=00000000168ea000 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=2038353a34313a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a34313a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000