syzkaller login: [ 49.904825] BUG: Bad rss-counter state mm:000000001e9e41b9 type:MM_FILEPAGES val:33 [ 49.905620] BUG: Bad rss-counter state mm:000000001e9e41b9 type:MM_ANONPAGES val:22 [ 49.938702] ================================================================== [ 49.939374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.940002] Read of size 8 at addr ffff88801417f140 by task sshd/219 [ 49.940573] [ 49.940722] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.941324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.941992] Call Trace: [ 49.942246] [ 49.942447] dump_stack_lvl+0x91/0xf0 [ 49.942791] print_report+0xcc/0x620 [ 49.943155] ? __virt_addr_valid+0x102/0x340 [ 49.943573] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.943986] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.944439] kasan_report+0xbe/0xf0 [ 49.944779] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.945210] vma_interval_tree_remove+0xc75/0xec0 [ 49.945618] vma_prepare+0xc54/0x11a0 [ 49.945937] __split_vma+0x5af/0x950 [ 49.946303] ? __pfx___split_vma+0x10/0x10 [ 49.946653] ? find_held_lock+0x2c/0x110 [ 49.947014] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.947410] ? lock_is_held_type+0x9f/0x120 [ 49.947780] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.948736] ? mtree_range_walk+0x632/0x900 [ 49.949156] ? mas_walk+0x5c7/0x7c0 [ 49.949482] do_vmi_munmap+0x1f1/0x2b0 [ 49.949837] mmap_region+0x1f9/0x2660 [ 49.950167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.950512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.950996] ? __pfx_lock_acquire+0x10/0x10 [ 49.951356] ? __pfx_mmap_region+0x10/0x10 [ 49.951717] ? security_mmap_addr+0x7d/0xa0 [ 49.952095] ? get_unmapped_area+0x1f5/0x3f0 [ 49.952542] do_mmap+0x854/0xf00 [ 49.952845] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.953208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.953596] ksys_mmap_pgoff+0x3af/0x500 [ 49.953942] do_syscall_64+0x3f/0x90 [ 49.954276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.954691] RIP: 0033:0x7fdef98abd82 [ 49.955007] 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 [ 49.956549] RSP: 002b:00007fff163f13f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.957184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdef98abd82 [ 49.957781] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdef8ce5000 [ 49.958393] RBP: 00007fdef8ce5000 R08: 0000000000000009 R09: 0000000000001000 [ 49.958989] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555af4da9d90 [ 49.959593] R13: 00007fff163f1410 R14: 00007fff163f1440 R15: 00007fff163f17a0 [ 49.960209] [ 49.960398] [ 49.960536] Allocated by task 212: [ 49.960826] kasan_save_stack+0x22/0x50 [ 49.961181] kasan_set_track+0x25/0x30 [ 49.961538] __kasan_slab_alloc+0x59/0x70 [ 49.961894] kmem_cache_alloc+0x16b/0x370 [ 49.962235] vm_area_dup+0x20/0x160 [ 49.962555] __split_vma+0x170/0x950 [ 49.962885] split_vma+0xc6/0x110 [ 49.963194] mprotect_fixup+0x8d2/0xb30 [ 49.963537] do_mprotect_pkey+0x87e/0xd40 [ 49.963897] __x64_sys_mprotect+0x78/0xc0 [ 49.964280] do_syscall_64+0x3f/0x90 [ 49.964584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.965020] [ 49.965168] Freed by task 212: [ 49.965437] kasan_save_stack+0x22/0x50 [ 49.965985] kasan_set_track+0x25/0x30 [ 49.966327] kasan_save_free_info+0x2b/0x50 [ 49.966674] __kasan_slab_free+0x10a/0x190 [ 49.967023] kmem_cache_free+0x10d/0x4d0 [ 49.967366] rcu_core+0x8c8/0x2860 [ 49.967661] __do_softirq+0x1b7/0x7d4 [ 49.968010] [ 49.968159] Last potentially related work creation: [ 49.968574] kasan_save_stack+0x22/0x50 [ 49.968909] __kasan_record_aux_stack+0x8e/0xa0 [ 49.969298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.969734] remove_vma+0x139/0x170 [ 49.970044] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.970450] do_vmi_munmap+0x1f1/0x2b0 [ 49.970778] __vm_munmap+0x138/0x3a0 [ 49.971096] __x64_sys_munmap+0x59/0x80 [ 49.971469] do_syscall_64+0x3f/0x90 [ 49.971798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.972260] [ 49.972402] Second to last potentially related work creation: [ 49.972849] kasan_save_stack+0x22/0x50 [ 49.973211] __kasan_record_aux_stack+0x8e/0xa0 [ 49.973586] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.974006] remove_vma+0x139/0x170 [ 49.974338] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.974707] do_vmi_munmap+0x1f1/0x2b0 [ 49.975017] mmap_region+0x1f9/0x2660 [ 49.975318] do_mmap+0x854/0xf00 [ 49.975587] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.975898] ksys_mmap_pgoff+0x7d/0x500 [ 49.976253] do_syscall_64+0x3f/0x90 [ 49.976561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.976977] [ 49.977138] The buggy address belongs to the object at ffff88801417f0e8 [ 49.977138] which belongs to the cache vm_area_struct of size 168 [ 49.978165] The buggy address is located 88 bytes inside of [ 49.978165] freed 168-byte region [ffff88801417f0e8, ffff88801417f190) [ 49.979282] [ 49.979455] The buggy address belongs to the physical page: [ 49.980020] page:000000007fe4d650 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1417f [ 49.980938] memcg:ffff888014107e01 [ 49.981254] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 49.981769] page_type: 0xffffffff() [ 49.982089] raw: 0100000000000200 ffff88800879fc80 ffffea000038c680 dead000000000003 [ 49.982742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014107e01 [ 49.983389] page dumped because: kasan: bad access detected [ 49.983897] [ 49.984061] Memory state around the buggy address: [ 49.984502] ffff88801417f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.985047] ffff88801417f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 49.985588] >ffff88801417f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.986141] ^ [ 49.986575] ffff88801417f180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 49.987146] ffff88801417f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 49.987726] ================================================================== [ 49.989018] Disabling lock debugging due to kernel taint [ 51.482527] BUG: Bad rss-counter state mm:000000001abd3ae6 type:MM_FILEPAGES val:33 [ 51.483231] BUG: Bad rss-counter state mm:000000001abd3ae6 type:MM_ANONPAGES val:22 [ 51.854517] BUG: Bad rss-counter state mm:000000002dbb6eed type:MM_FILEPAGES val:33 [ 51.855310] BUG: Bad rss-counter state mm:000000002dbb6eed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2901' (ECDSA) to the list of known hosts. 2023/06/20 09:29:44 fuzzer started 2023/06/20 09:29:44 dialing manager at localhost:44161 2023/06/20 09:29:44 checking machine... 2023/06/20 09:29:44 checking revisions... [ 52.386609] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:29:44 testing simple program... [ 52.428316] cgroup: Unknown subsys name 'net' [ 52.460967] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:29:33 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff856529e0 RCX=0000000080000101 RDX=ffffffff8542a6c0 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=ffffffff86605973 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888019819c00 RIP=ffffffff814c07f1 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=00007fc7abecff50 CR3=000000000ebc4000 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=2033343a39323a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a39323a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000008 RSI=ffff888016697f50 RDI=ffff888016697388 RBP=ffff8880166973e0 RSP=ffff888016697300 R8 =ffffffff864b024a R9 =ffff8880166973c8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880166973e8 R13=ffff8880166973d0 R14=ffff888016697f58 R15=ffff888016697388 RIP=ffffffff811303fe 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 00007fc7abaa0900 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=00007fc7ac057618 CR3=0000000014362000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000