syzkaller login: [ 30.463751] BUG: Bad rss-counter state mm:00000000c0c18c81 type:MM_FILEPAGES val:33 [ 30.465436] BUG: Bad rss-counter state mm:00000000c0c18c81 type:MM_ANONPAGES val:22 [ 30.633474] ================================================================== [ 30.634550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.635665] Read of size 8 at addr ffff888009669310 by task sshd/219 [ 30.636682] [ 30.636915] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.637823] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.638866] Call Trace: [ 30.639211] [ 30.639518] dump_stack_lvl+0x91/0xf0 [ 30.640057] print_report+0xcc/0x620 [ 30.640587] ? __virt_addr_valid+0x102/0x340 [ 30.641184] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641850] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642506] kasan_report+0xbe/0xf0 [ 30.643013] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643676] vma_interval_tree_remove+0xc75/0xec0 [ 30.644326] vma_prepare+0xc54/0x11a0 [ 30.644870] __split_vma+0x5af/0x950 [ 30.645370] ? __pfx___split_vma+0x10/0x10 [ 30.645931] ? find_held_lock+0x2c/0x110 [ 30.646478] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.647075] ? lock_is_held_type+0x9f/0x120 [ 30.647648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.648292] ? mtree_range_walk+0x632/0x900 [ 30.648885] ? mas_walk+0x5c7/0x7c0 [ 30.649389] do_vmi_munmap+0x1f1/0x2b0 [ 30.649914] mmap_region+0x1f9/0x2660 [ 30.650427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.650972] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.651730] ? __pfx_lock_acquire+0x10/0x10 [ 30.652297] ? __pfx_mmap_region+0x10/0x10 [ 30.652885] ? security_mmap_addr+0x7d/0xa0 [ 30.653452] ? get_unmapped_area+0x1f5/0x3f0 [ 30.654032] do_mmap+0x854/0xf00 [ 30.654504] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.655025] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.655624] ksys_mmap_pgoff+0x3af/0x500 [ 30.656159] do_syscall_64+0x3f/0x90 [ 30.656694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.657387] RIP: 0033:0x7fcd9920fd82 [ 30.657880] 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 [ 30.660144] RSP: 002b:00007ffcb48f5858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.661107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd9920fd82 [ 30.661998] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd98649000 [ 30.662902] RBP: 00007fcd98649000 R08: 0000000000000009 R09: 0000000000001000 [ 30.663831] R10: 0000000000000812 R11: 0000000000000206 R12: 000055785b9a9ec0 [ 30.664762] R13: 00007ffcb48f5870 R14: 00007ffcb48f58a0 R15: 00007ffcb48f5c00 [ 30.665698] [ 30.666017] [ 30.666250] Allocated by task 212: [ 30.666717] kasan_save_stack+0x22/0x50 [ 30.667268] kasan_set_track+0x25/0x30 [ 30.667807] __kasan_slab_alloc+0x59/0x70 [ 30.668382] kmem_cache_alloc+0x16b/0x370 [ 30.668960] vm_area_dup+0x20/0x160 [ 30.669463] __split_vma+0x170/0x950 [ 30.669971] split_vma+0xc6/0x110 [ 30.670454] mprotect_fixup+0x8d2/0xb30 [ 30.670999] do_mprotect_pkey+0x87e/0xd40 [ 30.671572] __x64_sys_mprotect+0x78/0xc0 [ 30.672137] do_syscall_64+0x3f/0x90 [ 30.672665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.673365] [ 30.673598] Freed by task 212: [ 30.674025] kasan_save_stack+0x22/0x50 [ 30.674577] kasan_set_track+0x25/0x30 [ 30.675114] kasan_save_free_info+0x2b/0x50 [ 30.675702] __kasan_slab_free+0x10a/0x190 [ 30.676285] kmem_cache_free+0x10d/0x4d0 [ 30.676863] rcu_core+0x8c8/0x2860 [ 30.677354] __do_softirq+0x1b7/0x7d4 [ 30.677881] [ 30.678117] Last potentially related work creation: [ 30.678763] kasan_save_stack+0x22/0x50 [ 30.679316] __kasan_record_aux_stack+0x8e/0xa0 [ 30.679936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.680651] remove_vma+0x139/0x170 [ 30.681146] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.681755] do_vmi_munmap+0x1f1/0x2b0 [ 30.682282] __vm_munmap+0x138/0x3a0 [ 30.682800] __x64_sys_munmap+0x59/0x80 [ 30.683344] do_syscall_64+0x3f/0x90 [ 30.683866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.684577] [ 30.684811] Second to last potentially related work creation: [ 30.685562] kasan_save_stack+0x22/0x50 [ 30.686114] __kasan_record_aux_stack+0x8e/0xa0 [ 30.686741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.687446] remove_vma+0x139/0x170 [ 30.687948] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.688575] do_vmi_munmap+0x1f1/0x2b0 [ 30.689101] mmap_region+0x1f9/0x2660 [ 30.689624] do_mmap+0x854/0xf00 [ 30.690096] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.690633] ksys_mmap_pgoff+0x3af/0x500 [ 30.691181] do_syscall_64+0x3f/0x90 [ 30.691701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.692409] [ 30.692646] The buggy address belongs to the object at ffff8880096692b8 [ 30.692646] which belongs to the cache vm_area_struct of size 168 [ 30.694253] The buggy address is located 88 bytes inside of [ 30.694253] freed 168-byte region [ffff8880096692b8, ffff888009669360) [ 30.695789] [ 30.696021] The buggy address belongs to the physical page: [ 30.696754] page:0000000021b70f65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9669 [ 30.697940] memcg:ffff88801010f201 [ 30.698409] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.699118] page_type: 0xffffffff() [ 30.699619] raw: 0100000000000200 ffff8880087a0c80 ffffea0000379a80 dead000000000008 [ 30.700641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801010f201 [ 30.701636] page dumped because: kasan: bad access detected [ 30.702369] [ 30.702605] Memory state around the buggy address: [ 30.703235] ffff888009669200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.704169] ffff888009669280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.705107] >ffff888009669300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.706037] ^ [ 30.706552] ffff888009669380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.707500] ffff888009669400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.708428] ================================================================== [ 30.709571] Disabling lock debugging due to kernel taint [ 32.425947] BUG: Bad rss-counter state mm:00000000937d7c3e type:MM_FILEPAGES val:33 [ 32.426986] BUG: Bad rss-counter state mm:00000000937d7c3e type:MM_ANONPAGES val:22 [ 32.851196] BUG: Bad rss-counter state mm:00000000cafe2a5b type:MM_FILEPAGES val:33 [ 32.852214] BUG: Bad rss-counter state mm:00000000cafe2a5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9786' (ECDSA) to the list of known hosts. 2023/06/20 18:09:19 fuzzer started 2023/06/20 18:09:19 dialing manager at localhost:36067 2023/06/20 18:09:19 checking machine... 2023/06/20 18:09:19 checking revisions... [ 33.516808] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:09:19 testing simple program... [ 33.571366] cgroup: Unknown subsys name 'net' [ 33.616171] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:09:19 Registers: info registers vcpu 0 RAX=ffffffff83c112c0 RBX=ffffffff85fe4920 RCX=ffffffff83c1130b RDX=0000000000000000 RSI=ffffffff86412c12 RDI=ffffffff85fe4920 RBP=ffffffff85fe4924 RSP=ffff8880146973e8 R8 =ffffffff86412c12 R9 =ffff8880146974e0 R10=0000000000038001 R11=000000000009a7d7 R12=ffffffff85fe4920 R13=ffffffff85fe4920 R14=ffffffff85fe4920 R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000206 [-----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 00007f48c4b05900 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=00005600dcc27768 CR3=000000000c61a000 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=3a1e6589df5a5c9b8f4c404d359c7497 XMM02=eff9b2d0a8fce9cb000000000011cd38 XMM03=2c67c8bc2e329bc3000000000011ce60 XMM04=908bbf3eaf729a0800000000000ae988 XMM05=cc17490504e238e10000000000133570 XMM06=dfcdbad4f1609c3700000000001326d8 XMM07=fb795ef6d65770560000000000121528 XMM08=2c67c8bc2e329bc3000000000011ce60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=ffffffff860d8201 RDX=1ffff1100d9e136d RSI=ffffffff8180c6a2 RDI=ffff88806cf09b68 RBP=0000000000000000 RSP=ffff88806cf09a78 R8 =ffffffff860d825a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015ce3680 R15=ffff88800fef8670 RIP=ffffffff813ad4be RFL=00000212 [----A--] 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 00007fab543c7900 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=00007fab5497f0b0 CR3=000000001ca6e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000