syzkaller login: [ 38.833768] BUG: Bad rss-counter state mm:000000001cc0108f type:MM_FILEPAGES val:33 [ 38.834966] BUG: Bad rss-counter state mm:000000001cc0108f type:MM_ANONPAGES val:22 [ 38.874866] ================================================================== [ 38.875835] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.876832] Read of size 8 at addr ffff88800c74ab38 by task sshd/219 [ 38.877597] [ 38.877826] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.878699] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.879690] Call Trace: [ 38.880013] [ 38.880298] dump_stack_lvl+0x91/0xf0 [ 38.880788] print_report+0xcc/0x620 [ 38.881280] ? __virt_addr_valid+0x102/0x340 [ 38.881840] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882452] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883073] kasan_report+0xbe/0xf0 [ 38.883549] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884164] vma_interval_tree_remove+0xc75/0xec0 [ 38.884780] vma_prepare+0xc54/0x11a0 [ 38.885262] __split_vma+0x5af/0x950 [ 38.885755] ? __pfx___split_vma+0x10/0x10 [ 38.886285] ? find_held_lock+0x2c/0x110 [ 38.886804] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.887362] ? lock_is_held_type+0x9f/0x120 [ 38.887898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.888504] ? mtree_range_walk+0x632/0x900 [ 38.889060] ? mas_walk+0x5c7/0x7c0 [ 38.889537] do_vmi_munmap+0x1f1/0x2b0 [ 38.890050] mmap_region+0x1f9/0x2660 [ 38.890530] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.891033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.891757] ? __pfx_lock_acquire+0x10/0x10 [ 38.892288] ? __pfx_mmap_region+0x10/0x10 [ 38.892824] ? security_mmap_addr+0x7d/0xa0 [ 38.893354] ? get_unmapped_area+0x1f5/0x3f0 [ 38.893917] do_mmap+0x854/0xf00 [ 38.894352] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.894851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.895407] ksys_mmap_pgoff+0x3af/0x500 [ 38.895914] do_syscall_64+0x3f/0x90 [ 38.896394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897041] RIP: 0033:0x7f32ee9a0d82 [ 38.897492] 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 [ 38.899607] RSP: 002b:00007ffe604eb998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.900506] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32ee9a0d82 [ 38.901354] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32eddda000 [ 38.902203] RBP: 00007f32eddda000 R08: 0000000000000009 R09: 0000000000001000 [ 38.903058] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560cfaa7ef70 [ 38.903893] R13: 00007ffe604eb9b0 R14: 00007ffe604eb9e0 R15: 00007ffe604ebd40 [ 38.904743] [ 38.905036] [ 38.905258] Allocated by task 212: [ 38.905702] kasan_save_stack+0x22/0x50 [ 38.906202] kasan_set_track+0x25/0x30 [ 38.906691] __kasan_slab_alloc+0x59/0x70 [ 38.907210] kmem_cache_alloc+0x16b/0x370 [ 38.907721] vm_area_dup+0x20/0x160 [ 38.908180] __split_vma+0x170/0x950 [ 38.908654] split_vma+0xc6/0x110 [ 38.909093] mprotect_fixup+0x8d2/0xb30 [ 38.909590] do_mprotect_pkey+0x87e/0xd40 [ 38.910111] __x64_sys_mprotect+0x78/0xc0 [ 38.910632] do_syscall_64+0x3f/0x90 [ 38.911102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911743] [ 38.911955] Freed by task 212: [ 38.912341] kasan_save_stack+0x22/0x50 [ 38.912836] kasan_set_track+0x25/0x30 [ 38.913322] kasan_save_free_info+0x2b/0x50 [ 38.913859] __kasan_slab_free+0x10a/0x190 [ 38.914394] kmem_cache_free+0x10d/0x4d0 [ 38.914894] rcu_core+0x8c8/0x2860 [ 38.915332] __do_softirq+0x1b7/0x7d4 [ 38.915815] [ 38.916027] Last potentially related work creation: [ 38.916613] kasan_save_stack+0x22/0x50 [ 38.917114] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918328] remove_vma+0x139/0x170 [ 38.918777] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.919333] do_vmi_munmap+0x1f1/0x2b0 [ 38.919823] __vm_munmap+0x138/0x3a0 [ 38.920292] __x64_sys_munmap+0x59/0x80 [ 38.920785] do_syscall_64+0x3f/0x90 [ 38.921257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.921908] [ 38.922123] The buggy address belongs to the object at ffff88800c74aae0 [ 38.922123] which belongs to the cache vm_area_struct of size 168 [ 38.923596] The buggy address is located 88 bytes inside of [ 38.923596] freed 168-byte region [ffff88800c74aae0, ffff88800c74ab88) [ 38.925002] [ 38.925220] The buggy address belongs to the physical page: [ 38.925895] page:000000009c0c9659 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc74a [ 38.926967] memcg:ffff88801415bc01 [ 38.927403] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.928046] page_type: 0xffffffff() [ 38.928495] raw: 0100000000000200 ffff8880087a0c80 ffffea0000607180 dead000000000008 [ 38.929410] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801415bc01 [ 38.930325] page dumped because: kasan: bad access detected [ 38.930984] [ 38.931199] Memory state around the buggy address: [ 38.931773] ffff88800c74aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.932619] ffff88800c74aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.933469] >ffff88800c74ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.934340] ^ [ 38.934948] ffff88800c74ab80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.935817] ffff88800c74ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.936668] ================================================================== [ 38.937719] Disabling lock debugging due to kernel taint [ 40.896524] BUG: Bad rss-counter state mm:00000000d661206b type:MM_FILEPAGES val:33 [ 40.897762] BUG: Bad rss-counter state mm:00000000d661206b type:MM_ANONPAGES val:22 [ 41.317541] BUG: Bad rss-counter state mm:000000001132f70c type:MM_FILEPAGES val:33 [ 41.318752] BUG: Bad rss-counter state mm:000000001132f70c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47361' (ECDSA) to the list of known hosts. 2023/06/21 02:02:38 fuzzer started 2023/06/21 02:02:38 dialing manager at localhost:36067 2023/06/21 02:02:38 checking machine... 2023/06/21 02:02:38 checking revisions... [ 41.970036] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:02:38 testing simple program... [ 42.006396] cgroup: Unknown subsys name 'net' [ 42.046751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:02:37 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81830828 RSP=ffff88801430fbf8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88806ce361c8 R13=ffffffff87b6a200 R14=ffff88800da95800 R15=0000000000000001 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007f49c6d88900 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=00007f49c73400b0 CR3=0000000009a44000 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=2037333a32303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a32303a3230203132 XMM08=3d656e696c646d632022656369767265 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=00007fbd38b07380 CR3=000000000d402000 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=fe6991c606fa79b2e6401776cac73efd XMM02=ec2efd57dc4c00df000000000011aef0 XMM03=0e21bc88cd788a65000000000011afc0 XMM04=3676336c01a4e1f300000000000ae988 XMM05=dfcdbad4f1609c3700000000001314c8 XMM06=ca8b9e5828b6436c00000000001306a0 XMM07=e042d86d42eb936e0000000000121ba0 XMM08=0e21bc88cd788a65000000000011afc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000