syzkaller login: [ 28.734844] BUG: Bad rss-counter state mm:0000000064db0d30 type:MM_FILEPAGES val:33 [ 28.736164] BUG: Bad rss-counter state mm:0000000064db0d30 type:MM_ANONPAGES val:22 [ 28.907802] ================================================================== [ 28.908877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.909969] Read of size 8 at addr ffff88800efad880 by task sshd/222 [ 28.911003] [ 28.911261] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.912141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.913106] Call Trace: [ 28.913423] [ 28.913703] dump_stack_lvl+0x91/0xf0 [ 28.914185] print_report+0xcc/0x620 [ 28.914670] ? __virt_addr_valid+0x102/0x340 [ 28.915222] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.915843] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.916447] kasan_report+0xbe/0xf0 [ 28.916919] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.917524] vma_interval_tree_remove+0xc75/0xec0 [ 28.918115] vma_prepare+0xc54/0x11a0 [ 28.918584] __split_vma+0x5af/0x950 [ 28.919053] ? __pfx___split_vma+0x10/0x10 [ 28.919568] ? find_held_lock+0x2c/0x110 [ 28.920080] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.920633] ? lock_is_held_type+0x9f/0x120 [ 28.921165] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.921762] ? mtree_range_walk+0x632/0x900 [ 28.922303] ? mas_walk+0x5c7/0x7c0 [ 28.922773] do_vmi_munmap+0x1f1/0x2b0 [ 28.923274] mmap_region+0x1f9/0x2660 [ 28.923749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.924258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.924955] ? __pfx_lock_acquire+0x10/0x10 [ 28.925473] ? __pfx_mmap_region+0x10/0x10 [ 28.925993] ? security_mmap_addr+0x7d/0xa0 [ 28.926514] ? get_unmapped_area+0x1f5/0x3f0 [ 28.927108] do_mmap+0x854/0xf00 [ 28.927554] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.928047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.928598] ksys_mmap_pgoff+0x3af/0x500 [ 28.929093] do_syscall_64+0x3f/0x90 [ 28.929563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.930194] RIP: 0033:0x7f47a95ffd82 [ 28.930644] 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 [ 28.932761] RSP: 002b:00007ffe83fe4728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.933649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47a95ffd82 [ 28.934480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47a8a39000 [ 28.935320] RBP: 00007f47a8a39000 R08: 0000000000000009 R09: 0000000000001000 [ 28.936186] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae3a805f70 [ 28.937048] R13: 00007ffe83fe4740 R14: 00007ffe83fe4770 R15: 00007ffe83fe4ad0 [ 28.937885] [ 28.938172] [ 28.938382] Allocated by task 213: [ 28.938802] kasan_save_stack+0x22/0x50 [ 28.939309] kasan_set_track+0x25/0x30 [ 28.939790] __kasan_slab_alloc+0x59/0x70 [ 28.940298] kmem_cache_alloc+0x16b/0x370 [ 28.940806] vm_area_dup+0x20/0x160 [ 28.941247] __split_vma+0x170/0x950 [ 28.941708] split_vma+0xc6/0x110 [ 28.942140] mprotect_fixup+0x8d2/0xb30 [ 28.942633] do_mprotect_pkey+0x87e/0xd40 [ 28.943168] __x64_sys_mprotect+0x78/0xc0 [ 28.943673] do_syscall_64+0x3f/0x90 [ 28.944138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.944764] [ 28.944976] Freed by task 213: [ 28.945360] kasan_save_stack+0x22/0x50 [ 28.945863] kasan_set_track+0x25/0x30 [ 28.946357] kasan_save_free_info+0x2b/0x50 [ 28.946895] __kasan_slab_free+0x10a/0x190 [ 28.947419] kmem_cache_free+0x10d/0x4d0 [ 28.947922] rcu_core+0x8c8/0x2860 [ 28.948361] __do_softirq+0x1b7/0x7d4 [ 28.948839] [ 28.949050] Last potentially related work creation: [ 28.949627] kasan_save_stack+0x22/0x50 [ 28.950119] __kasan_record_aux_stack+0x8e/0xa0 [ 28.950681] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.951428] remove_vma+0x139/0x170 [ 28.951874] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.952416] do_vmi_munmap+0x1f1/0x2b0 [ 28.952892] __vm_munmap+0x138/0x3a0 [ 28.953354] __x64_sys_munmap+0x59/0x80 [ 28.953841] do_syscall_64+0x3f/0x90 [ 28.954307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.954964] [ 28.955172] Second to last potentially related work creation: [ 28.955834] kasan_save_stack+0x22/0x50 [ 28.956323] __kasan_record_aux_stack+0x8e/0xa0 [ 28.956881] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.957499] remove_vma+0x139/0x170 [ 28.957942] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.958485] do_vmi_munmap+0x1f1/0x2b0 [ 28.958964] mmap_region+0x1f9/0x2660 [ 28.959426] do_mmap+0x854/0xf00 [ 28.959842] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.960312] ksys_mmap_pgoff+0x3af/0x500 [ 28.960798] do_syscall_64+0x3f/0x90 [ 28.961256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.961882] [ 28.962094] The buggy address belongs to the object at ffff88800efad828 [ 28.962094] which belongs to the cache vm_area_struct of size 168 [ 28.963528] The buggy address is located 88 bytes inside of [ 28.963528] freed 168-byte region [ffff88800efad828, ffff88800efad8d0) [ 28.964896] [ 28.965106] The buggy address belongs to the physical page: [ 28.965744] page:0000000056d34894 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefad [ 28.966799] memcg:ffff88800d5ea601 [ 28.967225] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.967851] page_type: 0xffffffff() [ 28.968291] raw: 0100000000000200 ffff8880087a0c80 ffffea0000372900 dead000000000008 [ 28.969182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5ea601 [ 28.970064] page dumped because: kasan: bad access detected [ 28.970707] [ 28.970922] Memory state around the buggy address: [ 28.971482] ffff88800efad780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.972315] ffff88800efad800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.973152] >ffff88800efad880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.973982] ^ [ 28.974379] ffff88800efad900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.975220] ffff88800efad980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.976049] ================================================================== [ 28.977058] Disabling lock debugging due to kernel taint [ 31.361438] BUG: Bad rss-counter state mm:00000000656de41f type:MM_FILEPAGES val:33 [ 31.362197] BUG: Bad rss-counter state mm:00000000656de41f type:MM_ANONPAGES val:22 [ 31.726275] BUG: Bad rss-counter state mm:0000000036a6205d type:MM_FILEPAGES val:33 [ 31.728058] BUG: Bad rss-counter state mm:0000000036a6205d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18320' (ECDSA) to the list of known hosts. 2023/06/21 07:46:46 fuzzer started 2023/06/21 07:46:46 dialing manager at localhost:36067 2023/06/21 07:46:46 checking machine... 2023/06/21 07:46:46 checking revisions... [ 32.446307] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:46:46 testing simple program... [ 32.511659] cgroup: Unknown subsys name 'net' [ 32.586211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:46:46 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff85652c60 RCX=0000000080000101 RDX=0000000000000000 RSI=ffffffff814c8471 RDI=ffffffff8542aab4 RBP=ffffffff86621198 RSP=ffff88806ce09a20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86621198 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d8f4a80 RIP=ffffffff814c0871 RFL=00000293 [--S-A-C] 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=00007f1a66b5abf0 CR3=000000000f6bc000 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=2036343a36343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36343a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864abb39 RBX=0000000000000001 RCX=ffffffff864abb34 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880198ef028 RSP=ffff8880198eef60 R8 =ffffffff864abb38 R9 =ffff8880198ef010 R10=0000000000038001 R11=00000000000b3fb2 R12=ffff8880198ef030 R13=ffff8880198ef018 R14=ffff8880198ef011 R15=ffff8880198eefd0 RIP=ffffffff81130abf 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 00007fae7c6b0900 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=00007fae7c67a008 CR3=000000000dc82000 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