syzkaller login: [ 38.725319] BUG: Bad rss-counter state mm:000000001a7d3699 type:MM_FILEPAGES val:33 [ 38.726323] BUG: Bad rss-counter state mm:000000001a7d3699 type:MM_ANONPAGES val:22 [ 38.879847] ================================================================== [ 38.880751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.881692] Read of size 8 at addr ffff88800b8e5c20 by task sshd/220 [ 38.882451] [ 38.882666] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.883669] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884653] Call Trace: [ 38.884972] [ 38.885255] dump_stack_lvl+0x91/0xf0 [ 38.885850] print_report+0xcc/0x620 [ 38.886425] ? __virt_addr_valid+0x102/0x340 [ 38.887072] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887828] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888559] kasan_report+0xbe/0xf0 [ 38.889140] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889889] vma_interval_tree_remove+0xc75/0xec0 [ 38.890618] vma_prepare+0xc54/0x11a0 [ 38.891196] __split_vma+0x5af/0x950 [ 38.891781] ? __pfx___split_vma+0x10/0x10 [ 38.892423] ? find_held_lock+0x2c/0x110 [ 38.893050] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893738] ? lock_is_held_type+0x9f/0x120 [ 38.894391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.895132] ? mtree_range_walk+0x632/0x900 [ 38.895804] ? mas_walk+0x5c7/0x7c0 [ 38.896376] do_vmi_munmap+0x1f1/0x2b0 [ 38.896979] mmap_region+0x1f9/0x2660 [ 38.897567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.898197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.899062] ? __pfx_lock_acquire+0x10/0x10 [ 38.899727] ? __pfx_mmap_region+0x10/0x10 [ 38.900380] ? security_mmap_addr+0x7d/0xa0 [ 38.900920] ? get_unmapped_area+0x1f5/0x3f0 [ 38.901473] do_mmap+0x854/0xf00 [ 38.901913] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.902409] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.902968] ksys_mmap_pgoff+0x3af/0x500 [ 38.903497] do_syscall_64+0x3f/0x90 [ 38.903969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904610] RIP: 0033:0x7fa5b1dd7d82 [ 38.905065] 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 [ 38.907182] RSP: 002b:00007ffc0e96a4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.908095] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5b1dd7d82 [ 38.908947] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5b1211000 [ 38.909797] RBP: 00007fa5b1211000 R08: 0000000000000009 R09: 0000000000001000 [ 38.910643] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558faf9fab20 [ 38.911502] R13: 00007ffc0e96a4e0 R14: 00007ffc0e96a510 R15: 00007ffc0e96a870 [ 38.912351] [ 38.912640] [ 38.912855] Allocated by task 213: [ 38.913285] kasan_save_stack+0x22/0x50 [ 38.913789] kasan_set_track+0x25/0x30 [ 38.914282] __kasan_slab_alloc+0x59/0x70 [ 38.914816] kmem_cache_alloc+0x16b/0x370 [ 38.915352] vm_area_dup+0x20/0x160 [ 38.915835] __split_vma+0x170/0x950 [ 38.916322] split_vma+0xc6/0x110 [ 38.916784] mprotect_fixup+0x8d2/0xb30 [ 38.917303] do_mprotect_pkey+0x87e/0xd40 [ 38.917838] __x64_sys_mprotect+0x78/0xc0 [ 38.918371] do_syscall_64+0x3f/0x90 [ 38.918858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919536] [ 38.919758] Freed by task 213: [ 38.920155] kasan_save_stack+0x22/0x50 [ 38.920681] kasan_set_track+0x25/0x30 [ 38.921196] kasan_save_free_info+0x2b/0x50 [ 38.921749] __kasan_slab_free+0x10a/0x190 [ 38.922297] kmem_cache_free+0x10d/0x4d0 [ 38.922824] rcu_core+0x8c8/0x2860 [ 38.923280] __do_softirq+0x1b7/0x7d4 [ 38.923789] [ 38.924013] Last potentially related work creation: [ 38.924674] kasan_save_stack+0x22/0x50 [ 38.925201] __kasan_record_aux_stack+0x8e/0xa0 [ 38.925795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.926455] remove_vma+0x139/0x170 [ 38.926920] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.927519] do_vmi_munmap+0x1f1/0x2b0 [ 38.928012] __vm_munmap+0x138/0x3a0 [ 38.928493] __x64_sys_munmap+0x59/0x80 [ 38.929006] do_syscall_64+0x3f/0x90 [ 38.929491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930147] [ 38.930370] The buggy address belongs to the object at ffff88800b8e5bc8 [ 38.930370] which belongs to the cache vm_area_struct of size 168 [ 38.931897] The buggy address is located 88 bytes inside of [ 38.931897] freed 168-byte region [ffff88800b8e5bc8, ffff88800b8e5c70) [ 38.933344] [ 38.933568] The buggy address belongs to the physical page: [ 38.934247] page:000000001435cb81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb8e5 [ 38.935350] memcg:ffff88800ba79001 [ 38.935809] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.936476] page_type: 0xffffffff() [ 38.936943] raw: 0100000000000200 ffff88800879fc80 ffffea000057ecc0 dead000000000004 [ 38.937893] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ba79001 [ 38.938828] page dumped because: kasan: bad access detected [ 38.939524] [ 38.939744] Memory state around the buggy address: [ 38.940342] ffff88800b8e5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.941226] ffff88800b8e5b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.942113] >ffff88800b8e5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.942987] ^ [ 38.943537] ffff88800b8e5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.944423] ffff88800b8e5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.945297] ================================================================== [ 38.946237] Disabling lock debugging due to kernel taint [ 40.802145] BUG: Bad rss-counter state mm:00000000204273cd type:MM_FILEPAGES val:33 [ 40.803193] BUG: Bad rss-counter state mm:00000000204273cd type:MM_ANONPAGES val:22 [ 41.247932] BUG: Bad rss-counter state mm:0000000029a6bc67 type:MM_FILEPAGES val:33 [ 41.249169] BUG: Bad rss-counter state mm:0000000029a6bc67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7726' (ECDSA) to the list of known hosts. 2023/06/19 19:14:51 fuzzer started 2023/06/19 19:14:51 dialing manager at localhost:44161 2023/06/19 19:14:51 checking machine... 2023/06/19 19:14:51 checking revisions... [ 41.981477] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:14:51 testing simple program... [ 42.026211] cgroup: Unknown subsys name 'net' [ 42.062835] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:14:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8186c21a RDX=ffff88800f8eb680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880099b2500 RSP=ffff88801470fdd8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880099b2550 R14=0000000000000000 R15=ffff8880099b2680 RIP=ffffffff814c01fc 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 00007f6e03b23900 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=00007f6e02f2fa40 CR3=000000000ef5c000 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=9d41577efef5521000000000000ae988 XMM05=d98208e379e6807c0000000000134cf0 XMM06=4fda316b135da52b0000000000133770 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000022 RCX=0000000000000000 RDX=ffff88800dc33680 RSI=ffffffff837263a5 RDI=0000000000000005 RBP=0000000000000023 RSP=ffff888018dd77b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96bf0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c07eb 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 00007f9c9ecda900 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=00007fff57116ff8 CR3=0000000016b34000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000