syzkaller login: [ 30.302951] sshd (213) used greatest stack depth: 24128 bytes left [ 30.305697] BUG: Bad rss-counter state mm:0000000045e0749c type:MM_FILEPAGES val:33 [ 30.306621] BUG: Bad rss-counter state mm:0000000045e0749c type:MM_ANONPAGES val:22 [ 30.466719] ================================================================== [ 30.467583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.468486] Read of size 8 at addr ffff88801025d3f8 by task sshd/220 [ 30.469204] [ 30.469411] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.470331] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.471242] Call Trace: [ 30.471563] [ 30.471832] dump_stack_lvl+0x91/0xf0 [ 30.472297] print_report+0xcc/0x620 [ 30.472750] ? __virt_addr_valid+0x102/0x340 [ 30.473267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.473850] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.474435] kasan_report+0xbe/0xf0 [ 30.474887] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.475469] vma_interval_tree_remove+0xc75/0xec0 [ 30.476049] vma_prepare+0xc54/0x11a0 [ 30.476538] __split_vma+0x5af/0x950 [ 30.477014] ? __pfx___split_vma+0x10/0x10 [ 30.477537] ? find_held_lock+0x2c/0x110 [ 30.478055] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.478619] ? lock_is_held_type+0x9f/0x120 [ 30.479169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.479805] ? mtree_range_walk+0x632/0x900 [ 30.480353] ? mas_walk+0x5c7/0x7c0 [ 30.480831] do_vmi_munmap+0x1f1/0x2b0 [ 30.481327] mmap_region+0x1f9/0x2660 [ 30.481805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.482313] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.483036] ? __pfx_lock_acquire+0x10/0x10 [ 30.483580] ? __pfx_mmap_region+0x10/0x10 [ 30.484107] ? security_mmap_addr+0x7d/0xa0 [ 30.484653] ? get_unmapped_area+0x1f5/0x3f0 [ 30.485205] do_mmap+0x854/0xf00 [ 30.485648] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.486147] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.486707] ksys_mmap_pgoff+0x3af/0x500 [ 30.487226] do_syscall_64+0x3f/0x90 [ 30.487712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.488369] RIP: 0033:0x7fa0ceb12d82 [ 30.488832] 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 [ 30.490994] RSP: 002b:00007ffcfad770d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.491916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0ceb12d82 [ 30.492780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0cdf4c000 [ 30.493629] RBP: 00007fa0cdf4c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.494489] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0dd42dec0 [ 30.495351] R13: 00007ffcfad770f0 R14: 00007ffcfad77120 R15: 00007ffcfad77480 [ 30.496230] [ 30.496523] [ 30.496738] Allocated by task 213: [ 30.497171] kasan_save_stack+0x22/0x50 [ 30.497671] kasan_set_track+0x25/0x30 [ 30.498164] __kasan_slab_alloc+0x59/0x70 [ 30.498693] kmem_cache_alloc+0x16b/0x370 [ 30.499200] vm_area_dup+0x20/0x160 [ 30.499652] __split_vma+0x170/0x950 [ 30.500124] split_vma+0xc6/0x110 [ 30.500568] mprotect_fixup+0x8d2/0xb30 [ 30.501083] do_mprotect_pkey+0x87e/0xd40 [ 30.501623] __x64_sys_mprotect+0x78/0xc0 [ 30.502140] do_syscall_64+0x3f/0x90 [ 30.502607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.503228] [ 30.503437] Freed by task 213: [ 30.503839] kasan_save_stack+0x22/0x50 [ 30.504332] kasan_set_track+0x25/0x30 [ 30.504833] kasan_save_free_info+0x2b/0x50 [ 30.505366] __kasan_slab_free+0x10a/0x190 [ 30.505899] kmem_cache_free+0x10d/0x4d0 [ 30.506392] rcu_core+0x8c8/0x2860 [ 30.506828] __do_softirq+0x1b7/0x7d4 [ 30.507304] [ 30.507521] Last potentially related work creation: [ 30.508109] kasan_save_stack+0x22/0x50 [ 30.508633] __kasan_record_aux_stack+0x8e/0xa0 [ 30.509210] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.509818] remove_vma+0x139/0x170 [ 30.510302] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.510945] do_vmi_munmap+0x1f1/0x2b0 [ 30.511510] __vm_munmap+0x138/0x3a0 [ 30.512038] __x64_sys_munmap+0x59/0x80 [ 30.512596] do_syscall_64+0x3f/0x90 [ 30.513131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.513855] [ 30.514105] The buggy address belongs to the object at ffff88801025d3a0 [ 30.514105] which belongs to the cache vm_area_struct of size 168 [ 30.515758] The buggy address is located 88 bytes inside of [ 30.515758] freed 168-byte region [ffff88801025d3a0, ffff88801025d448) [ 30.517366] [ 30.517608] The buggy address belongs to the physical page: [ 30.518364] page:00000000fdae3b8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025d [ 30.519656] memcg:ffff888018eceb01 [ 30.520159] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.520820] page_type: 0xffffffff() [ 30.521275] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.522217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018eceb01 [ 30.523156] page dumped because: kasan: bad access detected [ 30.523797] [ 30.524002] Memory state around the buggy address: [ 30.524550] ffff88801025d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.525377] ffff88801025d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.526251] >ffff88801025d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.527070] ^ [ 30.527906] ffff88801025d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.528759] ffff88801025d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.529569] ================================================================== [ 30.530628] Disabling lock debugging due to kernel taint [ 32.594708] BUG: Bad rss-counter state mm:00000000a64258be type:MM_FILEPAGES val:33 [ 32.595939] BUG: Bad rss-counter state mm:00000000a64258be type:MM_ANONPAGES val:22 [ 33.027840] BUG: Bad rss-counter state mm:00000000fabb73e0 type:MM_FILEPAGES val:33 [ 33.028861] BUG: Bad rss-counter state mm:00000000fabb73e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47560' (ECDSA) to the list of known hosts. 2023/06/20 20:55:48 fuzzer started 2023/06/20 20:55:48 dialing manager at localhost:36067 2023/06/20 20:55:48 checking machine... 2023/06/20 20:55:48 checking revisions... [ 33.703824] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:55:48 testing simple program... [ 33.752066] cgroup: Unknown subsys name 'net' [ 33.805969] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:55:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100120e423 RSI=ffffffff84d2ff20 RDI=ffff88800907211a RBP=ffff8880090720f8 RSP=ffff88800e93fc88 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff87f95760 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff8880090720e0 RIP=ffffffff812db471 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 00007f2f387b8900 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=00007ffe76a14000 CR3=000000001bb5c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ff0c16ad960 CR3=0000000015a68000 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=2037343a35353a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a35353a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000