syzkaller login: [ 30.975146] BUG: Bad rss-counter state mm:000000004f4745df type:MM_FILEPAGES val:33 [ 30.976790] BUG: Bad rss-counter state mm:000000004f4745df type:MM_ANONPAGES val:22 [ 31.122715] ================================================================== [ 31.123653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.124620] Read of size 8 at addr ffff88800dcdbb38 by task sshd/220 [ 31.125403] [ 31.125718] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.126597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.127595] Call Trace: [ 31.127943] [ 31.128243] dump_stack_lvl+0x91/0xf0 [ 31.128750] print_report+0xcc/0x620 [ 31.129246] ? __virt_addr_valid+0x102/0x340 [ 31.129818] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.130447] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.131070] kasan_report+0xbe/0xf0 [ 31.131548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132186] vma_interval_tree_remove+0xc75/0xec0 [ 31.132800] vma_prepare+0xc54/0x11a0 [ 31.133286] __split_vma+0x5af/0x950 [ 31.133760] ? __pfx___split_vma+0x10/0x10 [ 31.134301] ? find_held_lock+0x2c/0x110 [ 31.134830] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.135400] ? lock_is_held_type+0x9f/0x120 [ 31.135942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.136581] ? mtree_range_walk+0x632/0x900 [ 31.137136] ? mas_walk+0x5c7/0x7c0 [ 31.137617] do_vmi_munmap+0x1f1/0x2b0 [ 31.138112] mmap_region+0x1f9/0x2660 [ 31.138605] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.139117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.139841] ? __pfx_lock_acquire+0x10/0x10 [ 31.140389] ? __pfx_mmap_region+0x10/0x10 [ 31.140922] ? security_mmap_addr+0x7d/0xa0 [ 31.141463] ? get_unmapped_area+0x1f5/0x3f0 [ 31.142023] do_mmap+0x854/0xf00 [ 31.142472] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.142975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.143548] ksys_mmap_pgoff+0x3af/0x500 [ 31.144056] do_syscall_64+0x3f/0x90 [ 31.144570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.145217] RIP: 0033:0x7fbec1932d82 [ 31.145676] 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 [ 31.147798] RSP: 002b:00007ffcedd3dbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.148705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbec1932d82 [ 31.149556] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbec0d6c000 [ 31.150401] RBP: 00007fbec0d6c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.151242] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564bb0dbdf70 [ 31.152092] R13: 00007ffcedd3dbf0 R14: 00007ffcedd3dc20 R15: 00007ffcedd3df80 [ 31.152963] [ 31.153253] [ 31.153476] Allocated by task 213: [ 31.153902] kasan_save_stack+0x22/0x50 [ 31.154407] kasan_set_track+0x25/0x30 [ 31.154900] __kasan_slab_alloc+0x59/0x70 [ 31.155427] kmem_cache_alloc+0x16b/0x370 [ 31.155948] vm_area_dup+0x20/0x160 [ 31.156432] __split_vma+0x170/0x950 [ 31.156902] split_vma+0xc6/0x110 [ 31.157345] mprotect_fixup+0x8d2/0xb30 [ 31.157850] do_mprotect_pkey+0x87e/0xd40 [ 31.158377] __x64_sys_mprotect+0x78/0xc0 [ 31.158899] do_syscall_64+0x3f/0x90 [ 31.159374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.160017] [ 31.160239] Freed by task 13: [ 31.160629] kasan_save_stack+0x22/0x50 [ 31.161135] kasan_set_track+0x25/0x30 [ 31.161633] kasan_save_free_info+0x2b/0x50 [ 31.162166] __kasan_slab_free+0x10a/0x190 [ 31.162702] kmem_cache_free+0x10d/0x4d0 [ 31.163208] rcu_core+0x8c8/0x2860 [ 31.163659] __do_softirq+0x1b7/0x7d4 [ 31.164142] [ 31.164377] Last potentially related work creation: [ 31.164960] kasan_save_stack+0x22/0x50 [ 31.165463] __kasan_record_aux_stack+0x8e/0xa0 [ 31.166038] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.166695] remove_vma+0x139/0x170 [ 31.167155] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.167720] do_vmi_munmap+0x1f1/0x2b0 [ 31.168211] __vm_munmap+0x138/0x3a0 [ 31.168681] __x64_sys_munmap+0x59/0x80 [ 31.169180] do_syscall_64+0x3f/0x90 [ 31.169661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170303] [ 31.170520] The buggy address belongs to the object at ffff88800dcdbae0 [ 31.170520] which belongs to the cache vm_area_struct of size 168 [ 31.171997] The buggy address is located 88 bytes inside of [ 31.171997] freed 168-byte region [ffff88800dcdbae0, ffff88800dcdbb88) [ 31.173403] [ 31.173626] The buggy address belongs to the physical page: [ 31.174288] page:000000003c4ba1de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcdb [ 31.175359] memcg:ffff88800d97e501 [ 31.175785] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.176455] page_type: 0xffffffff() [ 31.176905] raw: 0100000000000200 ffff8880087a0c80 ffffea000024ed40 dead000000000006 [ 31.177819] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d97e501 [ 31.178734] page dumped because: kasan: bad access detected [ 31.179395] [ 31.179619] Memory state around the buggy address: [ 31.180202] ffff88800dcdba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.181063] ffff88800dcdba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.181927] >ffff88800dcdbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.182781] ^ [ 31.183392] ffff88800dcdbb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.184263] ffff88800dcdbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.185119] ================================================================== [ 31.186090] Disabling lock debugging due to kernel taint [ 33.273695] BUG: Bad rss-counter state mm:0000000034e730a9 type:MM_FILEPAGES val:33 [ 33.274630] BUG: Bad rss-counter state mm:0000000034e730a9 type:MM_ANONPAGES val:22 [ 33.710348] BUG: Bad rss-counter state mm:000000007cde8563 type:MM_FILEPAGES val:33 [ 33.711697] BUG: Bad rss-counter state mm:000000007cde8563 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37273' (ECDSA) to the list of known hosts. 2023/06/20 13:34:20 fuzzer started 2023/06/20 13:34:20 dialing manager at localhost:36067 2023/06/20 13:34:20 checking machine... 2023/06/20 13:34:20 checking revisions... [ 34.389837] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:34:20 testing simple program... [ 34.429164] cgroup: Unknown subsys name 'net' [ 34.465092] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:34:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f73c6dcd480 CR3=000000000fb6e000 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=2030323a34333a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a34333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000002e116329 RBX=0000000093919f82 RCX=ffff88806cf09c00 RDX=0000000000000007 RSI=0000000000000002 RDI=0000000026ad2a1b RBP=ffffffff813782f8 RSP=ffff88806cf09b68 R8 =00000000e8f3c54d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09bd0 R15=0000000000000007 RIP=ffffffff82270470 RFL=00000202 [-------] 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 00007fba7e65b900 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=00007ffd06fd7000 CR3=00000000197e0000 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