syzkaller login: [ 31.479228] BUG: Bad rss-counter state mm:000000001df5cba6 type:MM_FILEPAGES val:33 [ 31.480480] BUG: Bad rss-counter state mm:000000001df5cba6 type:MM_ANONPAGES val:22 [ 31.630356] ================================================================== [ 31.631452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.632640] Read of size 8 at addr ffff8880164bc798 by task sshd/220 [ 31.633454] [ 31.633675] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.634536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.635522] Call Trace: [ 31.635846] [ 31.636127] dump_stack_lvl+0x91/0xf0 [ 31.636627] print_report+0xcc/0x620 [ 31.637110] ? __virt_addr_valid+0x102/0x340 [ 31.637676] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.638295] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.638916] kasan_report+0xbe/0xf0 [ 31.639386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.640007] vma_interval_tree_remove+0xc75/0xec0 [ 31.640606] vma_prepare+0xc54/0x11a0 [ 31.641089] __split_vma+0x5af/0x950 [ 31.641580] ? __pfx___split_vma+0x10/0x10 [ 31.642120] ? find_held_lock+0x2c/0x110 [ 31.642635] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.643197] ? lock_is_held_type+0x9f/0x120 [ 31.643733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.644341] ? mtree_range_walk+0x632/0x900 [ 31.644891] ? mas_walk+0x5c7/0x7c0 [ 31.645375] do_vmi_munmap+0x1f1/0x2b0 [ 31.645871] mmap_region+0x1f9/0x2660 [ 31.646358] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.646871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.647575] ? __pfx_lock_acquire+0x10/0x10 [ 31.648103] ? __pfx_mmap_region+0x10/0x10 [ 31.648626] ? security_mmap_addr+0x7d/0xa0 [ 31.649159] ? get_unmapped_area+0x1f5/0x3f0 [ 31.649717] do_mmap+0x854/0xf00 [ 31.650154] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.650647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.651203] ksys_mmap_pgoff+0x3af/0x500 [ 31.651707] do_syscall_64+0x3f/0x90 [ 31.652183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.652825] RIP: 0033:0x7f39ce7cad82 [ 31.653288] 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 [ 31.655430] RSP: 002b:00007ffeaddcb2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.656326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39ce7cad82 [ 31.657170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39cdc04000 [ 31.658026] RBP: 00007f39cdc04000 R08: 0000000000000009 R09: 0000000000001000 [ 31.658860] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584b7436b20 [ 31.659701] R13: 00007ffeaddcb310 R14: 00007ffeaddcb340 R15: 00007ffeaddcb6a0 [ 31.660550] [ 31.660841] [ 31.661059] Allocated by task 213: [ 31.661505] kasan_save_stack+0x22/0x50 [ 31.662011] kasan_set_track+0x25/0x30 [ 31.662503] __kasan_slab_alloc+0x59/0x70 [ 31.663025] kmem_cache_alloc+0x16b/0x370 [ 31.663535] vm_area_dup+0x20/0x160 [ 31.663990] __split_vma+0x170/0x950 [ 31.664457] split_vma+0xc6/0x110 [ 31.664892] mprotect_fixup+0x8d2/0xb30 [ 31.665403] do_mprotect_pkey+0x87e/0xd40 [ 31.665925] __x64_sys_mprotect+0x78/0xc0 [ 31.666442] do_syscall_64+0x3f/0x90 [ 31.666920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.667557] [ 31.667774] Freed by task 213: [ 31.668166] kasan_save_stack+0x22/0x50 [ 31.668672] kasan_set_track+0x25/0x30 [ 31.669166] kasan_save_free_info+0x2b/0x50 [ 31.669707] __kasan_slab_free+0x10a/0x190 [ 31.670239] kmem_cache_free+0x10d/0x4d0 [ 31.670745] rcu_core+0x8c8/0x2860 [ 31.671188] __do_softirq+0x1b7/0x7d4 [ 31.671666] [ 31.671882] Last potentially related work creation: [ 31.672503] kasan_save_stack+0x22/0x50 [ 31.673019] __kasan_record_aux_stack+0x8e/0xa0 [ 31.673654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.674298] remove_vma+0x139/0x170 [ 31.674757] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.675317] do_vmi_munmap+0x1f1/0x2b0 [ 31.675805] __vm_munmap+0x138/0x3a0 [ 31.676280] __x64_sys_munmap+0x59/0x80 [ 31.676780] do_syscall_64+0x3f/0x90 [ 31.677255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.677900] [ 31.678112] The buggy address belongs to the object at ffff8880164bc740 [ 31.678112] which belongs to the cache vm_area_struct of size 168 [ 31.679611] The buggy address is located 88 bytes inside of [ 31.679611] freed 168-byte region [ffff8880164bc740, ffff8880164bc7e8) [ 31.681040] [ 31.681257] The buggy address belongs to the physical page: [ 31.681939] page:0000000032508df5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164bc [ 31.683033] memcg:ffff88800e081901 [ 31.683460] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.684115] page_type: 0xffffffff() [ 31.684567] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.685491] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e081901 [ 31.686387] page dumped because: kasan: bad access detected [ 31.687037] [ 31.687256] Memory state around the buggy address: [ 31.687826] ffff8880164bc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.688671] ffff8880164bc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.689561] >ffff8880164bc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.690409] ^ [ 31.690905] ffff8880164bc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.691757] ffff8880164bc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.692602] ================================================================== [ 31.693562] Disabling lock debugging due to kernel taint [ 34.288006] BUG: Bad rss-counter state mm:00000000c0908141 type:MM_FILEPAGES val:33 [ 34.289207] BUG: Bad rss-counter state mm:00000000c0908141 type:MM_ANONPAGES val:22 [ 34.756100] BUG: Bad rss-counter state mm:00000000baebb78c type:MM_FILEPAGES val:33 [ 34.757290] BUG: Bad rss-counter state mm:00000000baebb78c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32409' (ECDSA) to the list of known hosts. 2023/06/21 05:05:01 fuzzer started 2023/06/21 05:05:01 dialing manager at localhost:36067 2023/06/21 05:05:01 checking machine... 2023/06/21 05:05:01 checking revisions... [ 35.374787] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:05:01 testing simple program... [ 35.414714] cgroup: Unknown subsys name 'net' [ 35.462364] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:05:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000081 RCX=0000000000000000 RDX=ffff8880158451c0 RSI=ffffffff81f16c6e RDI=0000000000000001 RBP=ffff88800b5e0c98 RSP=ffff888015977830 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff81f16c72 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 00007f3891f4a900 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=00007f38924ff650 CR3=000000001c954000 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=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 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=0000000000000001 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=00007ffe4fea09f8 CR3=000000000fcee000 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=2031303a35303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a35303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000