syzkaller login: [ 31.033594] BUG: Bad rss-counter state mm:00000000263ee6e1 type:MM_FILEPAGES val:33 [ 31.034592] BUG: Bad rss-counter state mm:00000000263ee6e1 type:MM_ANONPAGES val:22 [ 31.203175] ================================================================== [ 31.204169] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.205158] Read of size 8 at addr ffff888019ceb880 by task sshd/221 [ 31.205972] [ 31.206355] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.207281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208322] Call Trace: [ 31.208674] [ 31.208975] dump_stack_lvl+0x91/0xf0 [ 31.209492] print_report+0xcc/0x620 [ 31.210002] ? __virt_addr_valid+0x102/0x340 [ 31.210588] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211234] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211889] kasan_report+0xbe/0xf0 [ 31.212399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.213074] vma_interval_tree_remove+0xc75/0xec0 [ 31.213727] vma_prepare+0xc54/0x11a0 [ 31.214251] __split_vma+0x5af/0x950 [ 31.214768] ? __pfx___split_vma+0x10/0x10 [ 31.215352] ? find_held_lock+0x2c/0x110 [ 31.215923] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.216547] ? lock_is_held_type+0x9f/0x120 [ 31.217139] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.217810] ? mtree_range_walk+0x632/0x900 [ 31.218420] ? mas_walk+0x5c7/0x7c0 [ 31.218942] do_vmi_munmap+0x1f1/0x2b0 [ 31.219500] mmap_region+0x1f9/0x2660 [ 31.220025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.220580] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.221367] ? __pfx_lock_acquire+0x10/0x10 [ 31.221952] ? __pfx_mmap_region+0x10/0x10 [ 31.222540] ? security_mmap_addr+0x7d/0xa0 [ 31.223121] ? get_unmapped_area+0x1f5/0x3f0 [ 31.223729] do_mmap+0x854/0xf00 [ 31.224214] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.224747] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.225364] ksys_mmap_pgoff+0x3af/0x500 [ 31.225922] do_syscall_64+0x3f/0x90 [ 31.226442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227150] RIP: 0033:0x7fac2f28dd82 [ 31.227661] 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 [ 31.230017] RSP: 002b:00007fff39470c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.231013] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac2f28dd82 [ 31.231940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac2e6c7000 [ 31.232863] RBP: 00007fac2e6c7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.233798] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560441613ec0 [ 31.234735] R13: 00007fff39470cb0 R14: 00007fff39470ce0 R15: 00007fff39471040 [ 31.235701] [ 31.236019] [ 31.236248] Allocated by task 214: [ 31.236721] kasan_save_stack+0x22/0x50 [ 31.237266] kasan_set_track+0x25/0x30 [ 31.237801] __kasan_slab_alloc+0x59/0x70 [ 31.238378] kmem_cache_alloc+0x16b/0x370 [ 31.238943] vm_area_dup+0x20/0x160 [ 31.239452] __split_vma+0x170/0x950 [ 31.239965] split_vma+0xc6/0x110 [ 31.240447] mprotect_fixup+0x8d2/0xb30 [ 31.240994] do_mprotect_pkey+0x87e/0xd40 [ 31.241569] __x64_sys_mprotect+0x78/0xc0 [ 31.242142] do_syscall_64+0x3f/0x90 [ 31.242661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243356] [ 31.243600] Freed by task 204: [ 31.244027] kasan_save_stack+0x22/0x50 [ 31.244577] kasan_set_track+0x25/0x30 [ 31.245111] kasan_save_free_info+0x2b/0x50 [ 31.245691] __kasan_slab_free+0x10a/0x190 [ 31.246272] kmem_cache_free+0x10d/0x4d0 [ 31.246826] rcu_core+0x8c8/0x2860 [ 31.247393] __do_softirq+0x1b7/0x7d4 [ 31.247917] [ 31.248154] Last potentially related work creation: [ 31.248797] kasan_save_stack+0x22/0x50 [ 31.249340] __kasan_record_aux_stack+0x8e/0xa0 [ 31.249962] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.250661] remove_vma+0x139/0x170 [ 31.251152] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.251764] do_vmi_munmap+0x1f1/0x2b0 [ 31.252292] __vm_munmap+0x138/0x3a0 [ 31.252801] __x64_sys_munmap+0x59/0x80 [ 31.253342] do_syscall_64+0x3f/0x90 [ 31.253863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254565] [ 31.254796] The buggy address belongs to the object at ffff888019ceb828 [ 31.254796] which belongs to the cache vm_area_struct of size 168 [ 31.256411] The buggy address is located 88 bytes inside of [ 31.256411] freed 168-byte region [ffff888019ceb828, ffff888019ceb8d0) [ 31.257946] [ 31.258179] The buggy address belongs to the physical page: [ 31.258893] page:00000000d6ce5475 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ceb [ 31.260089] memcg:ffff888019c57101 [ 31.260547] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.261250] page_type: 0xffffffff() [ 31.261740] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.262749] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c57101 [ 31.263728] page dumped because: kasan: bad access detected [ 31.264447] [ 31.264692] Memory state around the buggy address: [ 31.265246] ffff888019ceb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.266059] ffff888019ceb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.266859] >ffff888019ceb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.267660] ^ [ 31.268054] ffff888019ceb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.268856] ffff888019ceb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.269655] ================================================================== [ 31.270805] Disabling lock debugging due to kernel taint [ 33.347721] BUG: Bad rss-counter state mm:0000000091a7889a type:MM_FILEPAGES val:33 [ 33.349203] BUG: Bad rss-counter state mm:0000000091a7889a type:MM_ANONPAGES val:22 [ 33.923842] BUG: Bad rss-counter state mm:00000000dc869792 type:MM_FILEPAGES val:33 [ 33.925003] BUG: Bad rss-counter state mm:00000000dc869792 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39943' (ECDSA) to the list of known hosts. 2023/06/21 02:56:13 fuzzer started 2023/06/21 02:56:13 dialing manager at localhost:36067 2023/06/21 02:56:13 checking machine... 2023/06/21 02:56:13 checking revisions... [ 34.502803] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:56:13 testing simple program... [ 34.544009] cgroup: Unknown subsys name 'net' [ 34.606592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:56:13 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=00007fc9302968f0 CR3=000000000c9ec000 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=63ad0b9937cb6292a440f710f81d044e XMM02=2c67c8bc2e329bc3000000000011adf0 XMM03=fb795ef6d657705600000000001216f0 XMM04=44f7a4cdb8d5f58e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131548 XMM06=29ead0c7bbd47af500000000001303b0 XMM07=e042d86d42eb936e0000000000121970 XMM08=3b65812ed90b6f11000000000011ae50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007f79ef41b0b0 CR3=000000001658a000 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=2032313a36353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a36353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000