syzkaller login: [ 29.765294] BUG: Bad rss-counter state mm:00000000f0a37259 type:MM_FILEPAGES val:33 [ 29.766550] BUG: Bad rss-counter state mm:00000000f0a37259 type:MM_ANONPAGES val:22 [ 29.810575] ================================================================== [ 29.811536] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.812677] Read of size 8 at addr ffff88801a6f73f8 by task sshd/221 [ 29.813477] [ 29.813705] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.814620] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.815629] Call Trace: [ 29.815968] [ 29.816261] dump_stack_lvl+0x91/0xf0 [ 29.816772] print_report+0xcc/0x620 [ 29.817272] ? __virt_addr_valid+0x102/0x340 [ 29.817851] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.818518] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.819157] kasan_report+0xbe/0xf0 [ 29.819666] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.820331] vma_interval_tree_remove+0xc75/0xec0 [ 29.820968] vma_prepare+0xc54/0x11a0 [ 29.821478] __split_vma+0x5af/0x950 [ 29.821982] ? __pfx___split_vma+0x10/0x10 [ 29.822574] ? find_held_lock+0x2c/0x110 [ 29.823123] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.823722] ? lock_is_held_type+0x9f/0x120 [ 29.824307] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.824942] ? mtree_range_walk+0x632/0x900 [ 29.825526] ? mas_walk+0x5c7/0x7c0 [ 29.826029] do_vmi_munmap+0x1f1/0x2b0 [ 29.826572] mmap_region+0x1f9/0x2660 [ 29.827081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.827615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.828370] ? __pfx_lock_acquire+0x10/0x10 [ 29.828941] ? __pfx_mmap_region+0x10/0x10 [ 29.829505] ? security_mmap_addr+0x7d/0xa0 [ 29.830066] ? get_unmapped_area+0x1f5/0x3f0 [ 29.830661] do_mmap+0x854/0xf00 [ 29.831127] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.831652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.832251] ksys_mmap_pgoff+0x3af/0x500 [ 29.832781] do_syscall_64+0x3f/0x90 [ 29.833277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.833955] RIP: 0033:0x7fbc6e47bd82 [ 29.834440] 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 [ 29.836676] RSP: 002b:00007ffd02785058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.837631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc6e47bd82 [ 29.838548] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc6d8b5000 [ 29.839430] RBP: 00007fbc6d8b5000 R08: 0000000000000009 R09: 0000000000001000 [ 29.840319] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8fdd90d90 [ 29.841216] R13: 00007ffd02785070 R14: 00007ffd027850a0 R15: 00007ffd02785400 [ 29.842124] [ 29.842446] [ 29.842669] Allocated by task 214: [ 29.843110] kasan_save_stack+0x22/0x50 [ 29.843650] kasan_set_track+0x25/0x30 [ 29.844172] __kasan_slab_alloc+0x59/0x70 [ 29.844732] kmem_cache_alloc+0x16b/0x370 [ 29.845274] vm_area_dup+0x20/0x160 [ 29.845749] __split_vma+0x170/0x950 [ 29.846265] split_vma+0xc6/0x110 [ 29.846719] mprotect_fixup+0x8d2/0xb30 [ 29.847258] do_mprotect_pkey+0x87e/0xd40 [ 29.847812] __x64_sys_mprotect+0x78/0xc0 [ 29.848361] do_syscall_64+0x3f/0x90 [ 29.848858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.849535] [ 29.849761] Freed by task 214: [ 29.850169] kasan_save_stack+0x22/0x50 [ 29.850715] kasan_set_track+0x25/0x30 [ 29.851235] kasan_save_free_info+0x2b/0x50 [ 29.851790] __kasan_slab_free+0x10a/0x190 [ 29.852342] kmem_cache_free+0x10d/0x4d0 [ 29.852939] rcu_core+0x8c8/0x2860 [ 29.853413] __do_softirq+0x1b7/0x7d4 [ 29.853917] [ 29.854149] Last potentially related work creation: [ 29.854777] kasan_save_stack+0x22/0x50 [ 29.855309] __kasan_record_aux_stack+0x8e/0xa0 [ 29.855915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.856584] remove_vma+0x139/0x170 [ 29.857059] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.857654] do_vmi_munmap+0x1f1/0x2b0 [ 29.858155] __vm_munmap+0x138/0x3a0 [ 29.858662] __x64_sys_munmap+0x59/0x80 [ 29.859187] do_syscall_64+0x3f/0x90 [ 29.859688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.860368] [ 29.860597] The buggy address belongs to the object at ffff88801a6f73a0 [ 29.860597] which belongs to the cache vm_area_struct of size 168 [ 29.862160] The buggy address is located 88 bytes inside of [ 29.862160] freed 168-byte region [ffff88801a6f73a0, ffff88801a6f7448) [ 29.863651] [ 29.863880] The buggy address belongs to the physical page: [ 29.864578] page:000000003698a7be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a6f7 [ 29.865736] memcg:ffff88800cb6f901 [ 29.866189] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.866895] page_type: 0xffffffff() [ 29.867377] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.868350] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb6f901 [ 29.869305] page dumped because: kasan: bad access detected [ 29.870009] [ 29.870235] Memory state around the buggy address: [ 29.870868] ffff88801a6f7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.871768] ffff88801a6f7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.872676] >ffff88801a6f7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.873580] ^ [ 29.874499] ffff88801a6f7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.875405] ffff88801a6f7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.876308] ================================================================== [ 29.877390] Disabling lock debugging due to kernel taint [ 31.919522] BUG: Bad rss-counter state mm:0000000039e261a2 type:MM_FILEPAGES val:33 [ 31.920674] BUG: Bad rss-counter state mm:0000000039e261a2 type:MM_ANONPAGES val:22 [ 32.391830] BUG: Bad rss-counter state mm:00000000f08ee1e0 type:MM_FILEPAGES val:33 [ 32.393500] BUG: Bad rss-counter state mm:00000000f08ee1e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10232' (ECDSA) to the list of known hosts. 2023/06/20 18:23:01 fuzzer started 2023/06/20 18:23:01 dialing manager at localhost:36067 2023/06/20 18:23:01 checking machine... 2023/06/20 18:23:01 checking revisions... [ 33.114010] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:23:01 testing simple program... [ 33.167849] cgroup: Unknown subsys name 'net' [ 33.209100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:01 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff888009090000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff88800f4077d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed1001212001 R14=ffffffff85a23960 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--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 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=0000559908bc8218 CR3=000000000eab0000 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=2031303a33323a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a33323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf4b29 RBX=ffffffff85fa5948 RCX=ffffffff83641c43 RDX=0000000000000000 RSI=ffffffff863b4448 RDI=ffffffff85fa5944 RBP=ffffffff85fa5944 RSP=ffff88801a45f338 R8 =ffffffff863b4448 R9 =ffff88801a45f430 R10=0000000000038001 R11=000000000008abe0 R12=ffffffff85fa594c R13=ffffffff85fa5944 R14=ffffffff85fa5944 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f10969d0900 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=00007ffc5548d000 CR3=000000001a460000 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