syzkaller login: [ 38.785365] BUG: Bad rss-counter state mm:00000000aca08312 type:MM_FILEPAGES val:33 [ 38.787669] BUG: Bad rss-counter state mm:00000000aca08312 type:MM_ANONPAGES val:22 [ 38.884897] ================================================================== [ 38.885936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.886600] Read of size 8 at addr ffff88800ca773f8 by task sshd/219 [ 38.887189] [ 38.887362] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.887966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.888653] Call Trace: [ 38.888888] [ 38.889090] dump_stack_lvl+0x91/0xf0 [ 38.889468] print_report+0xcc/0x620 [ 38.889816] ? __virt_addr_valid+0x102/0x340 [ 38.890209] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890648] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891084] kasan_report+0xbe/0xf0 [ 38.891426] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891861] vma_interval_tree_remove+0xc75/0xec0 [ 38.892290] vma_prepare+0xc54/0x11a0 [ 38.892631] __split_vma+0x5af/0x950 [ 38.892989] ? __pfx___split_vma+0x10/0x10 [ 38.893364] ? find_held_lock+0x2c/0x110 [ 38.893733] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.894069] ? lock_is_held_type+0x9f/0x120 [ 38.894347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894656] ? mtree_range_walk+0x632/0x900 [ 38.894941] ? mas_walk+0x5c7/0x7c0 [ 38.895191] do_vmi_munmap+0x1f1/0x2b0 [ 38.895449] mmap_region+0x1f9/0x2660 [ 38.895702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.895968] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.896338] ? __pfx_lock_acquire+0x10/0x10 [ 38.896615] ? __pfx_mmap_region+0x10/0x10 [ 38.896895] ? security_mmap_addr+0x7d/0xa0 [ 38.897172] ? get_unmapped_area+0x1f5/0x3f0 [ 38.897458] do_mmap+0x854/0xf00 [ 38.897687] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.897943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.898234] ksys_mmap_pgoff+0x3af/0x500 [ 38.898496] do_syscall_64+0x3f/0x90 [ 38.898745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899080] RIP: 0033:0x7f668c07bd82 [ 38.899317] 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 [ 38.900508] RSP: 002b:00007ffecc339c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f668c07bd82 [ 38.901483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f668b4b5000 [ 38.901953] RBP: 00007f668b4b5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.902426] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7f0b54ec0 [ 38.902893] R13: 00007ffecc339c60 R14: 00007ffecc339c90 R15: 00007ffecc339ff0 [ 38.903366] [ 38.903527] [ 38.903648] Allocated by task 212: [ 38.903883] kasan_save_stack+0x22/0x50 [ 38.904162] kasan_set_track+0x25/0x30 [ 38.904437] __kasan_slab_alloc+0x59/0x70 [ 38.904722] kmem_cache_alloc+0x16b/0x370 [ 38.905018] vm_area_dup+0x20/0x160 [ 38.905269] __split_vma+0x170/0x950 [ 38.905525] split_vma+0xc6/0x110 [ 38.905764] mprotect_fixup+0x8d2/0xb30 [ 38.906040] do_mprotect_pkey+0x87e/0xd40 [ 38.906327] __x64_sys_mprotect+0x78/0xc0 [ 38.906617] do_syscall_64+0x3f/0x90 [ 38.906875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.907232] [ 38.907351] Freed by task 203: [ 38.907567] kasan_save_stack+0x22/0x50 [ 38.907846] kasan_set_track+0x25/0x30 [ 38.908119] kasan_save_free_info+0x2b/0x50 [ 38.908410] __kasan_slab_free+0x10a/0x190 [ 38.908702] kmem_cache_free+0x10d/0x4d0 [ 38.908993] rcu_core+0x8c8/0x2860 [ 38.909266] __do_softirq+0x1b7/0x7d4 [ 38.909557] [ 38.909682] Last potentially related work creation: [ 38.910037] kasan_save_stack+0x22/0x50 [ 38.910337] __kasan_record_aux_stack+0x8e/0xa0 [ 38.910696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.911089] remove_vma+0x139/0x170 [ 38.911365] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.911710] do_vmi_munmap+0x1f1/0x2b0 [ 38.912007] __vm_munmap+0x138/0x3a0 [ 38.912290] __x64_sys_munmap+0x59/0x80 [ 38.912585] do_syscall_64+0x3f/0x90 [ 38.912880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913264] [ 38.913394] The buggy address belongs to the object at ffff88800ca773a0 [ 38.913394] which belongs to the cache vm_area_struct of size 168 [ 38.914298] The buggy address is located 88 bytes inside of [ 38.914298] freed 168-byte region [ffff88800ca773a0, ffff88800ca77448) [ 38.915146] [ 38.915273] The buggy address belongs to the physical page: [ 38.915678] page:00000000a4c3f31d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca77 [ 38.916333] memcg:ffff88800e05ff01 [ 38.916590] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.916997] page_type: 0xffffffff() [ 38.917262] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a2080 dead000000000008 [ 38.917821] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e05ff01 [ 38.918377] page dumped because: kasan: bad access detected [ 38.918781] [ 38.918906] Memory state around the buggy address: [ 38.919249] ffff88800ca77280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.919759] ffff88800ca77300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.920269] >ffff88800ca77380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.920798] ^ [ 38.921315] ffff88800ca77400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.921835] ffff88800ca77480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.922337] ================================================================== [ 38.922999] Disabling lock debugging due to kernel taint [ 41.334243] BUG: Bad rss-counter state mm:0000000028438a62 type:MM_FILEPAGES val:33 [ 41.335220] BUG: Bad rss-counter state mm:0000000028438a62 type:MM_ANONPAGES val:22 [ 41.887009] BUG: Bad rss-counter state mm:000000006a2dbdec type:MM_FILEPAGES val:33 [ 41.888145] BUG: Bad rss-counter state mm:000000006a2dbdec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42537' (ECDSA) to the list of known hosts. 2023/06/20 13:40:53 fuzzer started 2023/06/20 13:40:53 dialing manager at localhost:36067 2023/06/20 13:40:54 checking machine... 2023/06/20 13:40:54 checking revisions... [ 42.504497] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:40:54 testing simple program... [ 42.553657] cgroup: Unknown subsys name 'net' [ 42.589626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:40:53 Registers: info registers vcpu 0 RAX=ffff88801b5bb410 RBX=ffff88806ce09ee8 RCX=1ffff110036b7682 RDX=ffff88801b5bb2e0 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=0000000000000046 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffffffff8542a6c0 R15=ffff888018456d90 RIP=ffffffff8137fcd9 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 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=00007f90a0dae6e0 CR3=000000000dc7a000 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=2033353a30343a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a30343a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009957d10 RCX=ffff88800844e948 RDX=0000000000000000 RSI=ffff888009a16720 RDI=ffff88800844e900 RBP=ffff888019de7a28 RSP=ffff888019de79a0 R8 =00000000000d000b R9 =ffffed10033bcf22 R10=0000000000000003 R11=00000000000d000c R12=ffff88800844f780 R13=ffff88800844e900 R14=ffffea0000268580 R15=00000000800d000b RIP=ffffffff81805e05 RFL=00000046 [---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 00007f9105f39900 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=00007ffd1a1c1000 CR3=0000000016b3c000 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=6720646572637465733a4d41503d706f 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