syzkaller login: [ 31.019838] BUG: Bad rss-counter state mm:00000000bc932ed2 type:MM_FILEPAGES val:33 [ 31.021517] BUG: Bad rss-counter state mm:00000000bc932ed2 type:MM_ANONPAGES val:22 [ 31.172405] ================================================================== [ 31.173551] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.174818] Read of size 8 at addr ffff88800d474968 by task sshd/220 [ 31.175788] [ 31.176044] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.177113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.178307] Call Trace: [ 31.178691] [ 31.179030] dump_stack_lvl+0x91/0xf0 [ 31.179647] print_report+0xcc/0x620 [ 31.180238] ? __virt_addr_valid+0x102/0x340 [ 31.180917] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.181687] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.182431] kasan_report+0xbe/0xf0 [ 31.183014] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183777] vma_interval_tree_remove+0xc75/0xec0 [ 31.184521] vma_prepare+0xc54/0x11a0 [ 31.185100] __split_vma+0x5af/0x950 [ 31.185676] ? __pfx___split_vma+0x10/0x10 [ 31.186321] ? find_held_lock+0x2c/0x110 [ 31.186949] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.187641] ? lock_is_held_type+0x9f/0x120 [ 31.188310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.189072] ? mtree_range_walk+0x632/0x900 [ 31.189758] ? mas_walk+0x5c7/0x7c0 [ 31.190332] do_vmi_munmap+0x1f1/0x2b0 [ 31.190944] mmap_region+0x1f9/0x2660 [ 31.191538] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.192191] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.193065] ? __pfx_lock_acquire+0x10/0x10 [ 31.193726] ? __pfx_mmap_region+0x10/0x10 [ 31.194366] ? security_mmap_addr+0x7d/0xa0 [ 31.195014] ? get_unmapped_area+0x1f5/0x3f0 [ 31.195711] do_mmap+0x854/0xf00 [ 31.196240] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196839] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.197526] ksys_mmap_pgoff+0x3af/0x500 [ 31.198143] do_syscall_64+0x3f/0x90 [ 31.198655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.199273] RIP: 0033:0x7f330d0d3d82 [ 31.199719] 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 [ 31.201727] RSP: 002b:00007ffc9dfa71c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.202582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f330d0d3d82 [ 31.203378] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f330c50d000 [ 31.204202] RBP: 00007f330c50d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.205015] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc050e1ec0 [ 31.205827] R13: 00007ffc9dfa71e0 R14: 00007ffc9dfa7210 R15: 00007ffc9dfa7570 [ 31.206642] [ 31.206921] [ 31.207125] Allocated by task 213: [ 31.207533] kasan_save_stack+0x22/0x50 [ 31.208027] kasan_set_track+0x25/0x30 [ 31.208503] __kasan_slab_alloc+0x59/0x70 [ 31.209064] kmem_cache_alloc+0x16b/0x370 [ 31.209605] vm_area_dup+0x20/0x160 [ 31.210038] __split_vma+0x170/0x950 [ 31.210479] split_vma+0xc6/0x110 [ 31.210897] mprotect_fixup+0x8d2/0xb30 [ 31.211374] do_mprotect_pkey+0x87e/0xd40 [ 31.211897] __x64_sys_mprotect+0x78/0xc0 [ 31.212408] do_syscall_64+0x3f/0x90 [ 31.212862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213468] [ 31.213673] Freed by task 213: [ 31.214049] kasan_save_stack+0x22/0x50 [ 31.214526] kasan_set_track+0x25/0x30 [ 31.214995] kasan_save_free_info+0x2b/0x50 [ 31.215497] __kasan_slab_free+0x10a/0x190 [ 31.216017] kmem_cache_free+0x10d/0x4d0 [ 31.216498] rcu_core+0x8c8/0x2860 [ 31.216924] __do_softirq+0x1b7/0x7d4 [ 31.217375] [ 31.217582] Last potentially related work creation: [ 31.218127] kasan_save_stack+0x22/0x50 [ 31.218646] __kasan_record_aux_stack+0x8e/0xa0 [ 31.219195] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.219826] remove_vma+0x139/0x170 [ 31.220256] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.220805] do_vmi_munmap+0x1f1/0x2b0 [ 31.221269] __vm_munmap+0x138/0x3a0 [ 31.221712] __x64_sys_munmap+0x59/0x80 [ 31.222183] do_syscall_64+0x3f/0x90 [ 31.222628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223240] [ 31.223443] Second to last potentially related work creation: [ 31.224097] kasan_save_stack+0x22/0x50 [ 31.224573] __kasan_record_aux_stack+0x8e/0xa0 [ 31.225114] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.225721] remove_vma+0x139/0x170 [ 31.226148] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.226675] do_vmi_munmap+0x1f1/0x2b0 [ 31.227136] mmap_region+0x1f9/0x2660 [ 31.227590] do_mmap+0x854/0xf00 [ 31.228000] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.228459] ksys_mmap_pgoff+0x7d/0x500 [ 31.228922] do_syscall_64+0x3f/0x90 [ 31.229375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.229987] [ 31.230195] The buggy address belongs to the object at ffff88800d474910 [ 31.230195] which belongs to the cache vm_area_struct of size 168 [ 31.231591] The buggy address is located 88 bytes inside of [ 31.231591] freed 168-byte region [ffff88800d474910, ffff88800d4749b8) [ 31.232909] [ 31.233114] The buggy address belongs to the physical page: [ 31.233733] page:0000000095f045cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd474 [ 31.234754] memcg:ffff88800d570601 [ 31.235153] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.235780] page_type: 0xffffffff() [ 31.236242] raw: 0100000000000200 ffff8880087a0c80 ffffea0000406200 dead000000000006 [ 31.237151] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d570601 [ 31.238023] page dumped because: kasan: bad access detected [ 31.238703] [ 31.238920] Memory state around the buggy address: [ 31.239500] ffff88800d474800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.240356] ffff88800d474880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.241196] >ffff88800d474900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.242037] ^ [ 31.242816] ffff88800d474980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.243672] ffff88800d474a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.244501] ================================================================== [ 31.245514] Disabling lock debugging due to kernel taint [ 33.124583] BUG: Bad rss-counter state mm:00000000ef1ad76b type:MM_FILEPAGES val:33 [ 33.125262] BUG: Bad rss-counter state mm:00000000ef1ad76b type:MM_ANONPAGES val:22 [ 33.644026] BUG: Bad rss-counter state mm:00000000e2d1e4b5 type:MM_FILEPAGES val:33 [ 33.645321] BUG: Bad rss-counter state mm:00000000e2d1e4b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39732' (ECDSA) to the list of known hosts. 2023/06/20 22:35:03 fuzzer started 2023/06/20 22:35:03 dialing manager at localhost:36067 2023/06/20 22:35:03 checking machine... 2023/06/20 22:35:03 checking revisions... [ 34.315787] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:35:03 testing simple program... [ 34.358688] cgroup: Unknown subsys name 'net' [ 34.404734] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:35:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b18 RCX=ffffffff860a1401 RDX=1ffff1100d9c1379 RSI=ffffffff8451105e RDI=ffff88806ce09b24 RBP=ffff88806ce09bc8 RSP=ffff88806ce09a30 R8 =ffffffff860a1444 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff8880162a51c0 R15=ffff8880097ebf00 RIP=ffffffff813ad547 RFL=00000246 [---Z-P-] 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 00007f2c13bad900 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=00007ffe5e76e000 CR3=000000000e982000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f1ebd793000 CR3=000000000db26000 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=2032303a35333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000