syzkaller login: [ 43.212184] BUG: Bad rss-counter state mm:00000000ec221b21 type:MM_FILEPAGES val:33 [ 43.212864] BUG: Bad rss-counter state mm:00000000ec221b21 type:MM_ANONPAGES val:22 [ 43.410585] ================================================================== [ 43.411191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.411808] Read of size 8 at addr ffff888016432310 by task sshd/220 [ 43.416336] [ 43.420240] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.420791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.421412] Call Trace: [ 43.421611] [ 43.421788] dump_stack_lvl+0x91/0xf0 [ 43.422085] print_report+0xcc/0x620 [ 43.422391] ? __virt_addr_valid+0x102/0x340 [ 43.422746] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.423142] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.423529] kasan_report+0xbe/0xf0 [ 43.423844] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.428326] vma_interval_tree_remove+0xc75/0xec0 [ 43.428749] vma_prepare+0xc54/0x11a0 [ 43.429062] __split_vma+0x5af/0x950 [ 43.429367] ? __pfx___split_vma+0x10/0x10 [ 43.429708] ? find_held_lock+0x2c/0x110 [ 43.430058] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.430424] ? lock_is_held_type+0x9f/0x120 [ 43.430778] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.431172] ? mtree_range_walk+0x632/0x900 [ 43.431542] ? mas_walk+0x5c7/0x7c0 [ 43.431868] do_vmi_munmap+0x1f1/0x2b0 [ 43.432258] mmap_region+0x1f9/0x2660 [ 43.432589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.432932] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.433403] ? __pfx_lock_acquire+0x10/0x10 [ 43.433761] ? __pfx_mmap_region+0x10/0x10 [ 43.434117] ? security_mmap_addr+0x7d/0xa0 [ 43.434476] ? get_unmapped_area+0x1f5/0x3f0 [ 43.434840] do_mmap+0x854/0xf00 [ 43.435131] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.435451] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.435827] ksys_mmap_pgoff+0x3af/0x500 [ 43.436182] do_syscall_64+0x3f/0x90 [ 43.436507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.436941] RIP: 0033:0x7f30c9953d82 [ 43.437239] 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 [ 43.438611] RSP: 002b:00007ffca3d8ac18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.439195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30c9953d82 [ 43.439745] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30c8d8d000 [ 43.444323] RBP: 00007f30c8d8d000 R08: 0000000000000009 R09: 0000000000001000 [ 43.444876] R10: 0000000000000812 R11: 0000000000000206 R12: 000056341cfbfec0 [ 43.445429] R13: 00007ffca3d8ac30 R14: 00007ffca3d8ac60 R15: 00007ffca3d8afc0 [ 43.446001] [ 43.446191] [ 43.446330] Allocated by task 213: [ 43.446604] kasan_save_stack+0x22/0x50 [ 43.446932] kasan_set_track+0x25/0x30 [ 43.447254] __kasan_slab_alloc+0x59/0x70 [ 43.447601] kmem_cache_alloc+0x16b/0x370 [ 43.447951] vm_area_dup+0x20/0x160 [ 43.448295] __split_vma+0x170/0x950 [ 43.448606] split_vma+0xc6/0x110 [ 43.448898] mprotect_fixup+0x8d2/0xb30 [ 43.449230] do_mprotect_pkey+0x87e/0xd40 [ 43.449572] __x64_sys_mprotect+0x78/0xc0 [ 43.449919] do_syscall_64+0x3f/0x90 [ 43.450225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.450634] [ 43.450779] Freed by task 213: [ 43.451036] kasan_save_stack+0x22/0x50 [ 43.451366] kasan_set_track+0x25/0x30 [ 43.451682] kasan_save_free_info+0x2b/0x50 [ 43.452035] __kasan_slab_free+0x10a/0x190 [ 43.452461] kmem_cache_free+0x10d/0x4d0 [ 43.452788] rcu_core+0x8c8/0x2860 [ 43.453071] __do_softirq+0x1b7/0x7d4 [ 43.453374] [ 43.453509] Last potentially related work creation: [ 43.453887] kasan_save_stack+0x22/0x50 [ 43.454207] __kasan_record_aux_stack+0x8e/0xa0 [ 43.454567] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.454975] remove_vma+0x139/0x170 [ 43.455259] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.455619] do_vmi_munmap+0x1f1/0x2b0 [ 43.455944] __vm_munmap+0x138/0x3a0 [ 43.460220] __x64_sys_munmap+0x59/0x80 [ 43.460561] do_syscall_64+0x3f/0x90 [ 43.460874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.461302] [ 43.461447] Second to last potentially related work creation: [ 43.461884] kasan_save_stack+0x22/0x50 [ 43.462210] __kasan_record_aux_stack+0x8e/0xa0 [ 43.462578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.463004] remove_vma+0x139/0x170 [ 43.463298] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.463659] do_vmi_munmap+0x1f1/0x2b0 [ 43.463980] mmap_region+0x1f9/0x2660 [ 43.464312] do_mmap+0x854/0xf00 [ 43.464586] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.464910] ksys_mmap_pgoff+0x3af/0x500 [ 43.465238] do_syscall_64+0x3f/0x90 [ 43.465547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.465962] [ 43.466105] The buggy address belongs to the object at ffff8880164322b8 [ 43.466105] which belongs to the cache vm_area_struct of size 168 [ 43.467047] The buggy address is located 88 bytes inside of [ 43.467047] freed 168-byte region [ffff8880164322b8, ffff888016432360) [ 43.467950] [ 43.468092] The buggy address belongs to the physical page: [ 43.476261] page:00000000598527ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16432 [ 43.476964] memcg:ffff888016433001 [ 43.477245] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.477720] page_type: 0xffffffff() [ 43.478026] raw: 0100000000000200 ffff88800879fc80 ffffea0000590c00 0000000000000003 [ 43.478612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016433001 [ 43.479199] page dumped because: kasan: bad access detected [ 43.479630] [ 43.479779] Memory state around the buggy address: [ 43.484171] ffff888016432200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 43.484746] ffff888016432280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.485313] >ffff888016432300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.485858] ^ [ 43.486151] ffff888016432380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.486697] ffff888016432400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.487248] ================================================================== [ 43.487859] Disabling lock debugging due to kernel taint [ 47.129714] BUG: Bad rss-counter state mm:0000000050b56610 type:MM_FILEPAGES val:33 [ 47.130857] BUG: Bad rss-counter state mm:0000000050b56610 type:MM_ANONPAGES val:22 [ 48.059522] BUG: Bad rss-counter state mm:00000000c10e7144 type:MM_FILEPAGES val:33 [ 48.060157] BUG: Bad rss-counter state mm:00000000c10e7144 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19863' (ECDSA) to the list of known hosts. 2023/06/20 09:56:28 fuzzer started 2023/06/20 09:56:29 dialing manager at localhost:44161 2023/06/20 09:56:29 checking machine... 2023/06/20 09:56:29 checking revisions... [ 49.049067] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:56:29 testing simple program... [ 49.106254] cgroup: Unknown subsys name 'net' [ 49.244987] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:56:24 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09501 RSI=ffff88806ce09548 RDI=ffff88806ce08ac8 RBP=ffff88806ce09548 RSP=ffff88806ce08a20 R8 =ffffffff863f5944 R9 =ffff88806ce08af8 R10=0000000000038001 R11=0000000000095e3e R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09550 R15=ffff88806ce08ab8 RIP=ffffffff811304ce RFL=00000286 [--S--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=00007efda6692fd0 CR3=0000000009614000 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=00000000000000000000000000000000 XMM01=ff6b07e98bf2a99c7646ab5ac67de2e0 XMM02=000000000011e4b8ec2efd57dc4c00df XMM03=00000000001246c0aeba8b64040fb0a9 XMM04=aa0f3c48fd2967ce00000000000ae988 XMM05=06ebfbadb4d75faf0000000000136e00 XMM06=db20f175d54767f00000000000135f10 XMM07=e042d86d42eb936e0000000000124998 XMM08=aeba8b64040fb0a9000000000011e518 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffff940000dcc66 RBX=fffff940000dcc67 RCX=ffffffff81660a52 RDX=fffff940000dcc67 RSI=0000000000000004 RDI=ffffea00006e6334 RBP=fffff940000dcc66 RSP=ffff888015bf7a68 R8 =0000000000000000 R9 =fffff940000dcc66 R10=ffffea00006e6337 R11=00000000000b6996 R12=0000000000000000 R13=dffffc0000000000 R14=00000000000001e7 R15=ffffea00006e6300 RIP=ffffffff8180f009 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 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=00007fbccbd14328 CR3=0000000005482000 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