syzkaller login: [ 32.600569] BUG: Bad rss-counter state mm:000000002fc71b8c type:MM_FILEPAGES val:33 [ 32.601767] BUG: Bad rss-counter state mm:000000002fc71b8c type:MM_ANONPAGES val:22 [ 32.638844] ================================================================== [ 32.639946] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.641026] Read of size 8 at addr ffff88800dcac6b0 by task sshd/220 [ 32.642005] [ 32.642224] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.643203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.644279] Call Trace: [ 32.644661] [ 32.644960] dump_stack_lvl+0x91/0xf0 [ 32.645513] print_report+0xcc/0x620 [ 32.646065] ? __virt_addr_valid+0x102/0x340 [ 32.646704] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.647355] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.648127] kasan_report+0xbe/0xf0 [ 32.648608] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.649241] vma_interval_tree_remove+0xc75/0xec0 [ 32.649853] vma_prepare+0xc54/0x11a0 [ 32.650342] __split_vma+0x5af/0x950 [ 32.650816] ? __pfx___split_vma+0x10/0x10 [ 32.651355] ? find_held_lock+0x2c/0x110 [ 32.651880] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.652470] ? lock_is_held_type+0x9f/0x120 [ 32.653013] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.653647] ? mtree_range_walk+0x632/0x900 [ 32.654202] ? mas_walk+0x5c7/0x7c0 [ 32.654690] do_vmi_munmap+0x1f1/0x2b0 [ 32.655187] mmap_region+0x1f9/0x2660 [ 32.655672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.656184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.656908] ? __pfx_lock_acquire+0x10/0x10 [ 32.657441] ? __pfx_mmap_region+0x10/0x10 [ 32.657988] ? security_mmap_addr+0x7d/0xa0 [ 32.658520] ? get_unmapped_area+0x1f5/0x3f0 [ 32.659070] do_mmap+0x854/0xf00 [ 32.659508] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.660001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.660564] ksys_mmap_pgoff+0x3af/0x500 [ 32.661080] do_syscall_64+0x3f/0x90 [ 32.661556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.662223] RIP: 0033:0x7f647653dd82 [ 32.662679] 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 [ 32.664782] RSP: 002b:00007ffe7471c388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.665705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f647653dd82 [ 32.666547] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6475977000 [ 32.667395] RBP: 00007f6475977000 R08: 0000000000000009 R09: 0000000000001000 [ 32.668239] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599ec382980 [ 32.669081] R13: 00007ffe7471c3a0 R14: 00007ffe7471c3d0 R15: 00007ffe7471c730 [ 32.669943] [ 32.670238] [ 32.670458] Allocated by task 213: [ 32.670882] kasan_save_stack+0x22/0x50 [ 32.671389] kasan_set_track+0x25/0x30 [ 32.671878] __kasan_slab_alloc+0x59/0x70 [ 32.672396] kmem_cache_alloc+0x16b/0x370 [ 32.672909] vm_area_dup+0x20/0x160 [ 32.673373] __split_vma+0x170/0x950 [ 32.673869] split_vma+0xc6/0x110 [ 32.674313] mprotect_fixup+0x8d2/0xb30 [ 32.674820] do_mprotect_pkey+0x87e/0xd40 [ 32.675344] __x64_sys_mprotect+0x78/0xc0 [ 32.675864] do_syscall_64+0x3f/0x90 [ 32.676345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.676985] [ 32.677208] Freed by task 203: [ 32.677615] kasan_save_stack+0x22/0x50 [ 32.678116] kasan_set_track+0x25/0x30 [ 32.678604] kasan_save_free_info+0x2b/0x50 [ 32.679142] __kasan_slab_free+0x10a/0x190 [ 32.679678] kmem_cache_free+0x10d/0x4d0 [ 32.680201] rcu_core+0x8c8/0x2860 [ 32.680646] __do_softirq+0x1b7/0x7d4 [ 32.681119] [ 32.681333] Last potentially related work creation: [ 32.681929] kasan_save_stack+0x22/0x50 [ 32.682433] __kasan_record_aux_stack+0x8e/0xa0 [ 32.683004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.683711] remove_vma+0x139/0x170 [ 32.684167] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.684725] do_vmi_munmap+0x1f1/0x2b0 [ 32.685210] __vm_munmap+0x138/0x3a0 [ 32.685690] __x64_sys_munmap+0x59/0x80 [ 32.686189] do_syscall_64+0x3f/0x90 [ 32.686660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.687300] [ 32.687515] Second to last potentially related work creation: [ 32.688196] kasan_save_stack+0x22/0x50 [ 32.688698] __kasan_record_aux_stack+0x8e/0xa0 [ 32.689280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.689927] remove_vma+0x139/0x170 [ 32.690377] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.690933] do_vmi_munmap+0x1f1/0x2b0 [ 32.691417] mmap_region+0x1f9/0x2660 [ 32.691891] do_mmap+0x854/0xf00 [ 32.692322] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.692807] ksys_mmap_pgoff+0x3af/0x500 [ 32.693306] do_syscall_64+0x3f/0x90 [ 32.693800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.694441] [ 32.694655] The buggy address belongs to the object at ffff88800dcac658 [ 32.694655] which belongs to the cache vm_area_struct of size 168 [ 32.696126] The buggy address is located 88 bytes inside of [ 32.696126] freed 168-byte region [ffff88800dcac658, ffff88800dcac700) [ 32.697524] [ 32.697756] The buggy address belongs to the physical page: [ 32.698421] page:00000000259d0bab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcac [ 32.699504] memcg:ffff888009eb5b01 [ 32.699924] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.700572] page_type: 0xffffffff() [ 32.701023] raw: 0100000000000200 ffff88800879fc80 ffffea0000367000 dead000000000002 [ 32.701954] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009eb5b01 [ 32.702864] page dumped because: kasan: bad access detected [ 32.703518] [ 32.703735] Memory state around the buggy address: [ 32.704322] ffff88800dcac580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.705171] ffff88800dcac600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.706048] >ffff88800dcac680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.706888] ^ [ 32.707477] ffff88800dcac700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 32.708347] ffff88800dcac780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.709189] ================================================================== [ 32.710186] Disabling lock debugging due to kernel taint [ 34.610022] BUG: Bad rss-counter state mm:0000000067e59c36 type:MM_FILEPAGES val:33 [ 34.611511] BUG: Bad rss-counter state mm:0000000067e59c36 type:MM_ANONPAGES val:22 [ 35.141327] BUG: Bad rss-counter state mm:00000000b4e1e6a2 type:MM_FILEPAGES val:33 [ 35.142526] BUG: Bad rss-counter state mm:00000000b4e1e6a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40198' (ECDSA) to the list of known hosts. 2023/06/20 07:43:52 fuzzer started 2023/06/20 07:43:52 dialing manager at localhost:44161 2023/06/20 07:43:52 checking machine... 2023/06/20 07:43:52 checking revisions... [ 35.763630] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:43:52 testing simple program... [ 35.816420] cgroup: Unknown subsys name 'net' [ 35.853717] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:43:50 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000008 RSI=ffffffff81efd8da RDI=0000000000000001 RBP=0000000000000001 RSP=ffff88801477f890 R8 =0000000000000000 R9 =ffff88801477f910 R10=0000000000000008 R11=0000000000000001 R12=0000000010000000 R13=0000000000000008 R14=0000000000000067 R15=ffff88801477f910 RIP=ffffffff814c07f1 RFL=00000282 [--S----] 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 00007fe56d410900 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=00007f754a9fb650 CR3=00000000095d2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ed47bdd985ae5be400000000000ae988 XMM05=7fba80f18bfb76d40000000000136580 XMM06=19e9129bd510f2350000000000135418 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000fdb8 RCX=0000000000000018 RDX=0000000000000003 RSI=ffffffff813cb539 RDI=0000000000000007 RBP=ffff88806cf2b988 RSP=ffff88806cf09ed8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=000000082061a4f4 R13=dffffc0000000000 R14=ffff88806cf2baa8 R15=0000000000000003 RIP=ffffffff813cb579 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 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=00007fffa8f64d58 CR3=000000000fbd6000 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=2032353a33343a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000