syzkaller login: [ 38.687766] BUG: Bad rss-counter state mm:0000000075bd83a1 type:MM_FILEPAGES val:33 [ 38.689584] BUG: Bad rss-counter state mm:0000000075bd83a1 type:MM_ANONPAGES val:22 [ 38.794005] ================================================================== [ 38.794903] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.795857] Read of size 8 at addr ffff888016775ed8 by task sshd/219 [ 38.796617] [ 38.796838] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.797785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.798759] Call Trace: [ 38.799084] [ 38.799365] dump_stack_lvl+0x91/0xf0 [ 38.799865] print_report+0xcc/0x620 [ 38.800351] ? __virt_addr_valid+0x102/0x340 [ 38.800897] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.801516] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.802125] kasan_report+0xbe/0xf0 [ 38.802596] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.803218] vma_interval_tree_remove+0xc75/0xec0 [ 38.803820] vma_prepare+0xc54/0x11a0 [ 38.804303] __split_vma+0x5af/0x950 [ 38.804774] ? __pfx___split_vma+0x10/0x10 [ 38.805298] ? find_held_lock+0x2c/0x110 [ 38.805815] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.806380] ? lock_is_held_type+0x9f/0x120 [ 38.806920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.807552] ? mtree_range_walk+0x632/0x900 [ 38.808105] ? mas_walk+0x5c7/0x7c0 [ 38.808584] do_vmi_munmap+0x1f1/0x2b0 [ 38.809074] mmap_region+0x1f9/0x2660 [ 38.809558] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.810069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.810783] ? __pfx_lock_acquire+0x10/0x10 [ 38.811333] ? __pfx_mmap_region+0x10/0x10 [ 38.811861] ? security_mmap_addr+0x7d/0xa0 [ 38.812397] ? get_unmapped_area+0x1f5/0x3f0 [ 38.812949] do_mmap+0x854/0xf00 [ 38.813388] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.813880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.814446] ksys_mmap_pgoff+0x3af/0x500 [ 38.814972] do_syscall_64+0x3f/0x90 [ 38.815457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.816108] RIP: 0033:0x7fd92f294d82 [ 38.816565] 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 [ 38.818698] RSP: 002b:00007ffd98368238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.819602] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd92f294d82 [ 38.820434] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd92e6ce000 [ 38.821267] RBP: 00007fd92e6ce000 R08: 0000000000000009 R09: 0000000000001000 [ 38.822100] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a988e5f70 [ 38.822939] R13: 00007ffd98368250 R14: 00007ffd98368280 R15: 00007ffd983685e0 [ 38.823822] [ 38.824117] [ 38.824332] Allocated by task 212: [ 38.824760] kasan_save_stack+0x22/0x50 [ 38.825265] kasan_set_track+0x25/0x30 [ 38.825758] __kasan_slab_alloc+0x59/0x70 [ 38.826279] kmem_cache_alloc+0x16b/0x370 [ 38.826788] vm_area_dup+0x20/0x160 [ 38.827246] __split_vma+0x170/0x950 [ 38.827709] split_vma+0xc6/0x110 [ 38.828147] mprotect_fixup+0x8d2/0xb30 [ 38.828646] do_mprotect_pkey+0x87e/0xd40 [ 38.829160] __x64_sys_mprotect+0x78/0xc0 [ 38.829674] do_syscall_64+0x3f/0x90 [ 38.830147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.830791] [ 38.831013] Freed by task 203: [ 38.831402] kasan_save_stack+0x22/0x50 [ 38.831900] kasan_set_track+0x25/0x30 [ 38.832388] kasan_save_free_info+0x2b/0x50 [ 38.832921] __kasan_slab_free+0x10a/0x190 [ 38.833451] kmem_cache_free+0x10d/0x4d0 [ 38.833956] rcu_core+0x8c8/0x2860 [ 38.834398] __do_softirq+0x1b7/0x7d4 [ 38.834873] [ 38.835101] Last potentially related work creation: [ 38.835684] kasan_save_stack+0x22/0x50 [ 38.836180] __kasan_record_aux_stack+0x8e/0xa0 [ 38.836743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.837377] remove_vma+0x139/0x170 [ 38.837823] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.838377] do_vmi_munmap+0x1f1/0x2b0 [ 38.838859] __vm_munmap+0x138/0x3a0 [ 38.839332] __x64_sys_munmap+0x59/0x80 [ 38.839855] do_syscall_64+0x3f/0x90 [ 38.840326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.840964] [ 38.841184] The buggy address belongs to the object at ffff888016775e80 [ 38.841184] which belongs to the cache vm_area_struct of size 168 [ 38.842668] The buggy address is located 88 bytes inside of [ 38.842668] freed 168-byte region [ffff888016775e80, ffff888016775f28) [ 38.844119] [ 38.844337] The buggy address belongs to the physical page: [ 38.844988] page:000000000d3c4ad9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16775 [ 38.846069] memcg:ffff88801a290d01 [ 38.846494] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.847141] page_type: 0xffffffff() [ 38.847592] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.848499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a290d01 [ 38.849395] page dumped because: kasan: bad access detected [ 38.850051] [ 38.850266] Memory state around the buggy address: [ 38.850841] ffff888016775d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.851705] ffff888016775e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.852552] >ffff888016775e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.853394] ^ [ 38.854114] ffff888016775f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.854965] ffff888016775f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.855807] ================================================================== [ 38.856759] Disabling lock debugging due to kernel taint [ 41.070431] BUG: Bad rss-counter state mm:00000000758d60ff type:MM_FILEPAGES val:33 [ 41.071489] BUG: Bad rss-counter state mm:00000000758d60ff type:MM_ANONPAGES val:22 [ 41.525008] BUG: Bad rss-counter state mm:000000007c967dbb type:MM_FILEPAGES val:33 [ 41.526757] BUG: Bad rss-counter state mm:000000007c967dbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41603' (ECDSA) to the list of known hosts. 2023/06/21 01:44:13 fuzzer started 2023/06/21 01:44:13 dialing manager at localhost:36067 2023/06/21 01:44:13 checking machine... 2023/06/21 01:44:13 checking revisions... [ 42.246395] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:44:14 testing simple program... [ 42.296456] cgroup: Unknown subsys name 'net' [ 42.342280] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:44:13 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=00007ffedca7d648 CR3=000000000fc88000 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=2033313a34343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a34343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002d69f66 RCX=0000000000000002 RDX=00000000000000c0 RSI=0000000000000000 RDI=ffff88800f90bb40 RBP=0000000000000000 RSP=ffff888016b4fb20 R8 =ffff888016b4faa0 R9 =0000000000000000 R10=ffff88800f90bb40 R11=00000000000b6a61 R12=ffff88800f90bb40 R13=ffff88801cd0aa00 R14=0000000000000cc0 R15=ffff888008fae000 RIP=ffffffff8451340a 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 00007fd98a339900 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=00007ffc3c78b000 CR3=000000000dd10000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000