syzkaller login: [ 38.785490] BUG: Bad rss-counter state mm:000000005782dd1e type:MM_FILEPAGES val:33 [ 38.786749] BUG: Bad rss-counter state mm:000000005782dd1e type:MM_ANONPAGES val:22 [ 38.823741] ================================================================== [ 38.824726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.825784] Read of size 8 at addr ffff88800e509228 by task sshd/220 [ 38.826593] [ 38.826826] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.827763] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.828832] Call Trace: [ 38.829169] [ 38.829473] dump_stack_lvl+0x91/0xf0 [ 38.829985] print_report+0xcc/0x620 [ 38.830494] ? __virt_addr_valid+0x102/0x340 [ 38.831080] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.831742] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.832394] kasan_report+0xbe/0xf0 [ 38.832899] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833558] vma_interval_tree_remove+0xc75/0xec0 [ 38.834195] vma_prepare+0xc54/0x11a0 [ 38.834699] __split_vma+0x5af/0x950 [ 38.835206] ? __pfx___split_vma+0x10/0x10 [ 38.835772] ? find_held_lock+0x2c/0x110 [ 38.836324] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.836921] ? lock_is_held_type+0x9f/0x120 [ 38.837494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.838129] ? mtree_range_walk+0x632/0x900 [ 38.838717] ? mas_walk+0x5c7/0x7c0 [ 38.839220] do_vmi_munmap+0x1f1/0x2b0 [ 38.839765] mmap_region+0x1f9/0x2660 [ 38.840281] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.840826] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.841575] ? __pfx_lock_acquire+0x10/0x10 [ 38.842145] ? __pfx_mmap_region+0x10/0x10 [ 38.842710] ? security_mmap_addr+0x7d/0xa0 [ 38.843270] ? get_unmapped_area+0x1f5/0x3f0 [ 38.843866] do_mmap+0x854/0xf00 [ 38.844334] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.844856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.845462] ksys_mmap_pgoff+0x3af/0x500 [ 38.846002] do_syscall_64+0x3f/0x90 [ 38.846516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.847206] RIP: 0033:0x7f5b3b905d82 [ 38.847712] 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 [ 38.849969] RSP: 002b:00007ffceddd7b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.850919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b3b905d82 [ 38.851826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b3ad3f000 [ 38.852718] RBP: 00007f5b3ad3f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.853612] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c28de3eec0 [ 38.854523] R13: 00007ffceddd7b20 R14: 00007ffceddd7b50 R15: 00007ffceddd7eb0 [ 38.855456] [ 38.855767] [ 38.855993] Allocated by task 213: [ 38.856446] kasan_save_stack+0x22/0x50 [ 38.856979] kasan_set_track+0x25/0x30 [ 38.857500] __kasan_slab_alloc+0x59/0x70 [ 38.858053] kmem_cache_alloc+0x16b/0x370 [ 38.858604] vm_area_dup+0x20/0x160 [ 38.859084] __split_vma+0x170/0x950 [ 38.859582] split_vma+0xc6/0x110 [ 38.860052] mprotect_fixup+0x8d2/0xb30 [ 38.860585] do_mprotect_pkey+0x87e/0xd40 [ 38.861138] __x64_sys_mprotect+0x78/0xc0 [ 38.861692] do_syscall_64+0x3f/0x90 [ 38.862196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.862882] [ 38.863112] Freed by task 213: [ 38.863558] kasan_save_stack+0x22/0x50 [ 38.864092] kasan_set_track+0x25/0x30 [ 38.864618] kasan_save_free_info+0x2b/0x50 [ 38.865182] __kasan_slab_free+0x10a/0x190 [ 38.865752] kmem_cache_free+0x10d/0x4d0 [ 38.866300] rcu_core+0x8c8/0x2860 [ 38.866769] __do_softirq+0x1b7/0x7d4 [ 38.867282] [ 38.867518] Last potentially related work creation: [ 38.868139] kasan_save_stack+0x22/0x50 [ 38.868676] __kasan_record_aux_stack+0x8e/0xa0 [ 38.869285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.869971] remove_vma+0x139/0x170 [ 38.870456] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.871060] do_vmi_munmap+0x1f1/0x2b0 [ 38.871598] __vm_munmap+0x138/0x3a0 [ 38.872092] __x64_sys_munmap+0x59/0x80 [ 38.872633] do_syscall_64+0x3f/0x90 [ 38.873140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873841] [ 38.874076] The buggy address belongs to the object at ffff88800e5091d0 [ 38.874076] which belongs to the cache vm_area_struct of size 168 [ 38.875693] The buggy address is located 88 bytes inside of [ 38.875693] freed 168-byte region [ffff88800e5091d0, ffff88800e509278) [ 38.877227] [ 38.877467] The buggy address belongs to the physical page: [ 38.878186] page:0000000023faa08c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe509 [ 38.879377] memcg:ffff88800c70ff01 [ 38.879836] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.880542] page_type: 0xffffffff() [ 38.881036] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.882033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c70ff01 [ 38.883022] page dumped because: kasan: bad access detected [ 38.883766] [ 38.884003] Memory state around the buggy address: [ 38.884638] ffff88800e509100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.885568] ffff88800e509180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.886504] >ffff88800e509200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.887433] ^ [ 38.888041] ffff88800e509280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.888978] ffff88800e509300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.889908] ================================================================== [ 38.891033] Disabling lock debugging due to kernel taint [ 40.880305] BUG: Bad rss-counter state mm:0000000039f61ad3 type:MM_FILEPAGES val:33 [ 40.881368] BUG: Bad rss-counter state mm:0000000039f61ad3 type:MM_ANONPAGES val:22 [ 41.358320] BUG: Bad rss-counter state mm:00000000019aa2c4 type:MM_FILEPAGES val:33 [ 41.359575] BUG: Bad rss-counter state mm:00000000019aa2c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27977' (ECDSA) to the list of known hosts. 2023/06/20 19:17:45 fuzzer started 2023/06/20 19:17:45 dialing manager at localhost:36067 2023/06/20 19:17:45 checking machine... 2023/06/20 19:17:45 checking revisions... [ 41.995983] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:17:45 testing simple program... [ 42.042626] cgroup: Unknown subsys name 'net' [ 42.095764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:17:45 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=ffff888008c04000 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=00007f87a5adf470 CR3=000000000f344000 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=2035343a37313a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a37313a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801786f118 RCX=ffffffff86129a01 RDX=1ffff11002f0de24 RSI=ffffffff8450cc7f RDI=ffff88801786f120 RBP=000000000000000d RSP=ffff88801786f030 R8 =ffffffff86129ab2 R9 =ffff88801786f090 R10=0000000000038001 R11=000000000001e4ed R12=ffff88801786f118 R13=0000000000000000 R14=ffff888017909b40 R15=0000000000000000 RIP=ffffffff813ad4be RFL=00000216 [----AP-] 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 00007f962d086900 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=00007f962d065020 CR3=000000001bfd4000 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