syzkaller login: [ 60.878046] BUG: Bad rss-counter state mm:00000000b3f3cb0c type:MM_FILEPAGES val:33 [ 60.879300] BUG: Bad rss-counter state mm:00000000b3f3cb0c type:MM_ANONPAGES val:22 [ 60.926662] ================================================================== [ 60.927608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.928752] Read of size 8 at addr ffff88800dc6e5c8 by task sshd/221 [ 60.929670] [ 60.929895] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.930782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.931755] Call Trace: [ 60.932084] [ 60.932377] dump_stack_lvl+0x91/0xf0 [ 60.932877] print_report+0xcc/0x620 [ 60.933372] ? __virt_addr_valid+0x102/0x340 [ 60.933937] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.934576] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.935279] kasan_report+0xbe/0xf0 [ 60.935920] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.936631] vma_interval_tree_remove+0xc75/0xec0 [ 60.937239] vma_prepare+0xc54/0x11a0 [ 60.937724] __split_vma+0x5af/0x950 [ 60.938212] ? __pfx___split_vma+0x10/0x10 [ 60.938794] ? find_held_lock+0x2c/0x110 [ 60.939316] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.939888] ? lock_is_held_type+0x9f/0x120 [ 60.940426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.941044] ? mtree_range_walk+0x632/0x900 [ 60.941593] ? mas_walk+0x5c7/0x7c0 [ 60.942087] do_vmi_munmap+0x1f1/0x2b0 [ 60.942601] mmap_region+0x1f9/0x2660 [ 60.943084] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.943590] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.944312] ? __pfx_lock_acquire+0x10/0x10 [ 60.944841] ? __pfx_mmap_region+0x10/0x10 [ 60.945373] ? security_mmap_addr+0x7d/0xa0 [ 60.945898] ? get_unmapped_area+0x1f5/0x3f0 [ 60.946461] do_mmap+0x854/0xf00 [ 60.946902] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.947398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.947955] ksys_mmap_pgoff+0x3af/0x500 [ 60.948468] do_syscall_64+0x3f/0x90 [ 60.948947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.949593] RIP: 0033:0x7f6c12293d82 [ 60.950049] 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 [ 60.952224] RSP: 002b:00007fff6e145b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.953175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c12293d82 [ 60.954061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c116cd000 [ 60.954925] RBP: 00007f6c116cd000 R08: 0000000000000009 R09: 0000000000001000 [ 60.955786] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5fed09b20 [ 60.956668] R13: 00007fff6e145b60 R14: 00007fff6e145b90 R15: 00007fff6e145ef0 [ 60.957552] [ 60.957853] [ 60.958070] Allocated by task 214: [ 60.958536] kasan_save_stack+0x22/0x50 [ 60.959058] kasan_set_track+0x25/0x30 [ 60.959563] __kasan_slab_alloc+0x59/0x70 [ 60.960094] kmem_cache_alloc+0x16b/0x370 [ 60.960624] vm_area_dup+0x20/0x160 [ 60.961095] __split_vma+0x170/0x950 [ 60.961569] split_vma+0xc6/0x110 [ 60.962010] mprotect_fixup+0x8d2/0xb30 [ 60.962533] do_mprotect_pkey+0x87e/0xd40 [ 60.963062] __x64_sys_mprotect+0x78/0xc0 [ 60.963581] do_syscall_64+0x3f/0x90 [ 60.964057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.964706] [ 60.964923] Freed by task 214: [ 60.965319] kasan_save_stack+0x22/0x50 [ 60.965823] kasan_set_track+0x25/0x30 [ 60.966332] kasan_save_free_info+0x2b/0x50 [ 60.966888] __kasan_slab_free+0x10a/0x190 [ 60.967425] kmem_cache_free+0x10d/0x4d0 [ 60.968107] rcu_core+0x8c8/0x2860 [ 60.968552] __do_softirq+0x1b7/0x7d4 [ 60.969026] [ 60.969239] Last potentially related work creation: [ 60.969836] kasan_save_stack+0x22/0x50 [ 60.970339] __kasan_record_aux_stack+0x8e/0xa0 [ 60.970936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.971591] remove_vma+0x139/0x170 [ 60.972047] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.972621] do_vmi_munmap+0x1f1/0x2b0 [ 60.973109] __vm_munmap+0x138/0x3a0 [ 60.973573] __x64_sys_munmap+0x59/0x80 [ 60.974078] do_syscall_64+0x3f/0x90 [ 60.974564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.975210] [ 60.975425] The buggy address belongs to the object at ffff88800dc6e570 [ 60.975425] which belongs to the cache vm_area_struct of size 168 [ 60.976917] The buggy address is located 88 bytes inside of [ 60.976917] freed 168-byte region [ffff88800dc6e570, ffff88800dc6e618) [ 60.978324] [ 60.978563] The buggy address belongs to the physical page: [ 60.979235] page:00000000df2ef479 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc6e [ 60.980327] memcg:ffff8880180f8a01 [ 60.980760] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.981411] page_type: 0xffffffff() [ 60.981863] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 60.982804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180f8a01 [ 60.983725] page dumped because: kasan: bad access detected [ 60.984390] [ 60.984610] Memory state around the buggy address: [ 60.985202] ffff88800dc6e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.986057] ffff88800dc6e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 60.986923] >ffff88800dc6e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.987778] ^ [ 60.988451] ffff88800dc6e600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 60.989313] ffff88800dc6e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.990166] ================================================================== [ 60.991118] Disabling lock debugging due to kernel taint [ 62.793603] BUG: Bad rss-counter state mm:00000000bb41f2f9 type:MM_FILEPAGES val:33 [ 62.794666] BUG: Bad rss-counter state mm:00000000bb41f2f9 type:MM_ANONPAGES val:22 [ 63.171292] BUG: Bad rss-counter state mm:00000000cad18e3e type:MM_FILEPAGES val:33 [ 63.172024] BUG: Bad rss-counter state mm:00000000cad18e3e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64393' (ECDSA) to the list of known hosts. 2023/06/21 07:28:10 fuzzer started 2023/06/21 07:28:11 dialing manager at localhost:36067 2023/06/21 07:28:11 checking machine... 2023/06/21 07:28:11 checking revisions... [ 63.863752] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:28:11 testing simple program... [ 63.903997] cgroup: Unknown subsys name 'net' [ 63.968146] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:28:10 Registers: info registers vcpu 0 RAX=ffffffff8186c9a6 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801b1d7a01 RSI=ffff88801b1d7ad8 RDI=ffff88801b1d7ad8 RBP=ffff88801b1d76a0 RSP=ffff88801b1d75d8 R8 =ffffffff861386fe R9 =ffff88801b1d7688 R10=0000000000038001 R11=0000000000020c51 R12=ffff88801b1d76a8 R13=ffff88801b1d7690 R14=ffff88801b1d7ae0 R15=ffff88801b1d7648 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f331cdc5900 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=00007fffd651b000 CR3=000000000d66c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007f331d37a650 CR3=000000000e50e000 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=2030313a38323a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a38323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000