syzkaller login: [ 42.155019] BUG: Bad rss-counter state mm:00000000ef0fdd15 type:MM_FILEPAGES val:33 [ 42.156340] BUG: Bad rss-counter state mm:00000000ef0fdd15 type:MM_ANONPAGES val:22 [ 42.203834] ================================================================== [ 42.204986] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.206055] Read of size 8 at addr ffff88800e673228 by task sshd/224 [ 42.206972] [ 42.207269] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.208250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.209371] Call Trace: [ 42.209768] [ 42.210063] dump_stack_lvl+0x91/0xf0 [ 42.210685] print_report+0xcc/0x620 [ 42.211266] ? __virt_addr_valid+0x102/0x340 [ 42.211917] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.212627] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.213302] kasan_report+0xbe/0xf0 [ 42.213808] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.214605] vma_interval_tree_remove+0xc75/0xec0 [ 42.215212] vma_prepare+0xc54/0x11a0 [ 42.215718] __split_vma+0x5af/0x950 [ 42.216197] ? __pfx___split_vma+0x10/0x10 [ 42.216745] ? find_held_lock+0x2c/0x110 [ 42.217266] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.217858] ? lock_is_held_type+0x9f/0x120 [ 42.218397] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.219020] ? mtree_range_walk+0x632/0x900 [ 42.219611] ? mas_walk+0x5c7/0x7c0 [ 42.220092] do_vmi_munmap+0x1f1/0x2b0 [ 42.220593] mmap_region+0x1f9/0x2660 [ 42.221081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.221619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.222383] ? __pfx_lock_acquire+0x10/0x10 [ 42.222967] ? __pfx_mmap_region+0x10/0x10 [ 42.223546] ? security_mmap_addr+0x7d/0xa0 [ 42.224116] ? get_unmapped_area+0x1f5/0x3f0 [ 42.224708] do_mmap+0x854/0xf00 [ 42.225177] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.225737] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.226334] ksys_mmap_pgoff+0x3af/0x500 [ 42.226889] do_syscall_64+0x3f/0x90 [ 42.227404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.228117] RIP: 0033:0x7f45f840dd82 [ 42.228614] 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 [ 42.230913] RSP: 002b:00007ffd91b32448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.231901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45f840dd82 [ 42.232823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45f7847000 [ 42.233767] RBP: 00007f45f7847000 R08: 0000000000000009 R09: 0000000000001000 [ 42.234683] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555979320d90 [ 42.235609] R13: 00007ffd91b32460 R14: 00007ffd91b32490 R15: 00007ffd91b327f0 [ 42.236528] [ 42.236836] [ 42.237062] Allocated by task 217: [ 42.237537] kasan_save_stack+0x22/0x50 [ 42.238090] kasan_set_track+0x25/0x30 [ 42.238682] __kasan_slab_alloc+0x59/0x70 [ 42.239242] kmem_cache_alloc+0x16b/0x370 [ 42.239807] vm_area_dup+0x20/0x160 [ 42.240292] __split_vma+0x170/0x950 [ 42.240806] split_vma+0xc6/0x110 [ 42.241274] mprotect_fixup+0x8d2/0xb30 [ 42.241833] do_mprotect_pkey+0x87e/0xd40 [ 42.242387] __x64_sys_mprotect+0x78/0xc0 [ 42.242949] do_syscall_64+0x3f/0x90 [ 42.243442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.244152] [ 42.244418] Freed by task 203: [ 42.244948] kasan_save_stack+0x22/0x50 [ 42.245622] kasan_set_track+0x25/0x30 [ 42.246297] kasan_save_free_info+0x2b/0x50 [ 42.247033] __kasan_slab_free+0x10a/0x190 [ 42.247754] kmem_cache_free+0x10d/0x4d0 [ 42.248446] rcu_core+0x8c8/0x2860 [ 42.249052] __do_softirq+0x1b7/0x7d4 [ 42.249698] [ 42.250001] Last potentially related work creation: [ 42.250798] kasan_save_stack+0x22/0x50 [ 42.251408] __kasan_record_aux_stack+0x8e/0xa0 [ 42.252029] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.252735] remove_vma+0x139/0x170 [ 42.253220] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.253831] do_vmi_munmap+0x1f1/0x2b0 [ 42.254332] __vm_munmap+0x138/0x3a0 [ 42.254851] __x64_sys_munmap+0x59/0x80 [ 42.255384] do_syscall_64+0x3f/0x90 [ 42.255898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.256592] [ 42.256819] Second to last potentially related work creation: [ 42.257558] kasan_save_stack+0x22/0x50 [ 42.258109] __kasan_record_aux_stack+0x8e/0xa0 [ 42.258749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.259429] remove_vma+0x139/0x170 [ 42.259924] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.260528] do_vmi_munmap+0x1f1/0x2b0 [ 42.261052] mmap_region+0x1f9/0x2660 [ 42.261565] do_mmap+0x854/0xf00 [ 42.262033] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.262569] ksys_mmap_pgoff+0x3af/0x500 [ 42.263100] do_syscall_64+0x3f/0x90 [ 42.263614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.264302] [ 42.264542] The buggy address belongs to the object at ffff88800e6731d0 [ 42.264542] which belongs to the cache vm_area_struct of size 168 [ 42.266369] The buggy address is located 88 bytes inside of [ 42.266369] freed 168-byte region [ffff88800e6731d0, ffff88800e673278) [ 42.267941] [ 42.268174] The buggy address belongs to the physical page: [ 42.268986] page:00000000983c558b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe673 [ 42.270252] memcg:ffff88800d282d01 [ 42.270713] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.271388] page_type: 0xffffffff() [ 42.271886] raw: 0100000000000200 ffff88800879fc80 ffffea0000577900 dead000000000008 [ 42.272890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d282d01 [ 42.273878] page dumped because: kasan: bad access detected [ 42.274594] [ 42.274819] Memory state around the buggy address: [ 42.275426] ffff88800e673100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.276372] ffff88800e673180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 42.277302] >ffff88800e673200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 42.278228] ^ [ 42.278828] ffff88800e673280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 42.279775] ffff88800e673300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 42.280700] ================================================================== [ 42.281728] Disabling lock debugging due to kernel taint [ 44.330329] BUG: Bad rss-counter state mm:00000000f411e560 type:MM_FILEPAGES val:33 [ 44.331480] BUG: Bad rss-counter state mm:00000000f411e560 type:MM_ANONPAGES val:22 [ 44.779079] BUG: Bad rss-counter state mm:0000000000841c62 type:MM_FILEPAGES val:33 [ 44.780067] BUG: Bad rss-counter state mm:0000000000841c62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53815' (ECDSA) to the list of known hosts. 2023/06/19 18:37:57 fuzzer started 2023/06/19 18:37:57 dialing manager at localhost:44161 2023/06/19 18:37:57 checking machine... 2023/06/19 18:37:57 checking revisions... [ 45.445391] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:37:57 testing simple program... [ 45.499024] cgroup: Unknown subsys name 'net' [ 45.551911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:37:53 Registers: info registers vcpu 0 RAX=0000000000021ee6 RBX=0000000000000001 RCX=ffffffff81847451 RDX=0000000000021ee7 RSI=0000000000008474 RDI=ffffffff8613dd36 RBP=ffff8880145cf4e8 RSP=ffff8880145cf420 R8 =ffffffff8613dd30 R9 =ffff8880145cf4d0 R10=0000000000038001 R11=0000000000021ee6 R12=ffff8880145cf4f0 R13=ffff8880145cf4d8 R14=ffff8880145cf4d1 R15=ffff8880145cf490 RIP=ffffffff81130868 RFL=00000283 [--S---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 00007f3875173900 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=00007fffa2ba2000 CR3=0000000016066000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f3ead9b9058 CR3=0000000018900000 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=37333a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3333325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323232 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000