syzkaller login: [ 31.072418] BUG: Bad rss-counter state mm:0000000006c2e84e type:MM_FILEPAGES val:33 [ 31.073503] BUG: Bad rss-counter state mm:0000000006c2e84e type:MM_ANONPAGES val:22 [ 31.121968] ================================================================== [ 31.123135] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.124087] Read of size 8 at addr ffff88800e4814e0 by task sshd/219 [ 31.124890] [ 31.125119] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.126003] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.126989] Call Trace: [ 31.127310] [ 31.127595] dump_stack_lvl+0x91/0xf0 [ 31.128107] print_report+0xcc/0x620 [ 31.128603] ? __virt_addr_valid+0x102/0x340 [ 31.129176] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.129791] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.130418] kasan_report+0xbe/0xf0 [ 31.130908] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.131538] vma_interval_tree_remove+0xc75/0xec0 [ 31.132164] vma_prepare+0xc54/0x11a0 [ 31.132653] __split_vma+0x5af/0x950 [ 31.133131] ? __pfx___split_vma+0x10/0x10 [ 31.133664] ? find_held_lock+0x2c/0x110 [ 31.134191] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.134754] ? lock_is_held_type+0x9f/0x120 [ 31.135300] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.135919] ? mtree_range_walk+0x632/0x900 [ 31.136492] ? mas_walk+0x5c7/0x7c0 [ 31.136997] do_vmi_munmap+0x1f1/0x2b0 [ 31.137488] mmap_region+0x1f9/0x2660 [ 31.137979] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.138488] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.139214] ? __pfx_lock_acquire+0x10/0x10 [ 31.139741] ? __pfx_mmap_region+0x10/0x10 [ 31.140282] ? security_mmap_addr+0x7d/0xa0 [ 31.140822] ? get_unmapped_area+0x1f5/0x3f0 [ 31.141373] do_mmap+0x854/0xf00 [ 31.141805] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.142336] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.142914] ksys_mmap_pgoff+0x3af/0x500 [ 31.143415] do_syscall_64+0x3f/0x90 [ 31.143897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.144575] RIP: 0033:0x7f3dc30ddd82 [ 31.145045] 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 [ 31.147269] RSP: 002b:00007ffe69ff7d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.148201] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3dc30ddd82 [ 31.149066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3dc2517000 [ 31.149916] RBP: 00007f3dc2517000 R08: 0000000000000009 R09: 0000000000001000 [ 31.150751] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b1f287f70 [ 31.151600] R13: 00007ffe69ff7d50 R14: 00007ffe69ff7d80 R15: 00007ffe69ff80e0 [ 31.152488] [ 31.152780] [ 31.153011] Allocated by task 212: [ 31.153432] kasan_save_stack+0x22/0x50 [ 31.153948] kasan_set_track+0x25/0x30 [ 31.154436] __kasan_slab_alloc+0x59/0x70 [ 31.154966] kmem_cache_alloc+0x16b/0x370 [ 31.155472] vm_area_dup+0x20/0x160 [ 31.155939] __split_vma+0x170/0x950 [ 31.156425] split_vma+0xc6/0x110 [ 31.156871] mprotect_fixup+0x8d2/0xb30 [ 31.157396] do_mprotect_pkey+0x87e/0xd40 [ 31.157933] __x64_sys_mprotect+0x78/0xc0 [ 31.158451] do_syscall_64+0x3f/0x90 [ 31.158937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.159583] [ 31.159795] Freed by task 212: [ 31.160202] kasan_save_stack+0x22/0x50 [ 31.160710] kasan_set_track+0x25/0x30 [ 31.161223] kasan_save_free_info+0x2b/0x50 [ 31.161751] __kasan_slab_free+0x10a/0x190 [ 31.162308] kmem_cache_free+0x10d/0x4d0 [ 31.162813] rcu_core+0x8c8/0x2860 [ 31.163268] __do_softirq+0x1b7/0x7d4 [ 31.163765] [ 31.164020] Last potentially related work creation: [ 31.164646] kasan_save_stack+0x22/0x50 [ 31.165162] __kasan_record_aux_stack+0x8e/0xa0 [ 31.165739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.166401] remove_vma+0x139/0x170 [ 31.166858] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.167443] do_vmi_munmap+0x1f1/0x2b0 [ 31.167944] __vm_munmap+0x138/0x3a0 [ 31.168437] __x64_sys_munmap+0x59/0x80 [ 31.168960] do_syscall_64+0x3f/0x90 [ 31.169439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170104] [ 31.170321] Second to last potentially related work creation: [ 31.171021] kasan_save_stack+0x22/0x50 [ 31.171534] __kasan_record_aux_stack+0x8e/0xa0 [ 31.172142] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.172804] remove_vma+0x139/0x170 [ 31.173271] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.173839] do_vmi_munmap+0x1f1/0x2b0 [ 31.174354] mmap_region+0x1f9/0x2660 [ 31.174834] do_mmap+0x854/0xf00 [ 31.175286] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.175779] ksys_mmap_pgoff+0x3af/0x500 [ 31.176294] do_syscall_64+0x3f/0x90 [ 31.176796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.177469] [ 31.177686] The buggy address belongs to the object at ffff88800e481488 [ 31.177686] which belongs to the cache vm_area_struct of size 168 [ 31.179204] The buggy address is located 88 bytes inside of [ 31.179204] freed 168-byte region [ffff88800e481488, ffff88800e481530) [ 31.180853] [ 31.181083] The buggy address belongs to the physical page: [ 31.181753] page:00000000dd36f78e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe481 [ 31.182901] memcg:ffff88800deae301 [ 31.183336] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.183996] page_type: 0xffffffff() [ 31.184471] raw: 0100000000000200 ffff8880087a0c80 ffffea000035e4c0 dead000000000006 [ 31.185412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deae301 [ 31.186341] page dumped because: kasan: bad access detected [ 31.187028] [ 31.187248] Memory state around the buggy address: [ 31.187837] ffff88800e481380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.188741] ffff88800e481400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.189614] >ffff88800e481480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.190486] ^ [ 31.191252] ffff88800e481500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.192137] ffff88800e481580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.193022] ================================================================== [ 31.194158] Disabling lock debugging due to kernel taint [ 33.123491] BUG: Bad rss-counter state mm:0000000015a0f0b9 type:MM_FILEPAGES val:33 [ 33.124490] BUG: Bad rss-counter state mm:0000000015a0f0b9 type:MM_ANONPAGES val:22 [ 33.601149] BUG: Bad rss-counter state mm:00000000e1f2339a type:MM_FILEPAGES val:33 [ 33.602179] BUG: Bad rss-counter state mm:00000000e1f2339a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15545' (ECDSA) to the list of known hosts. 2023/06/21 04:03:04 fuzzer started 2023/06/21 04:03:04 dialing manager at localhost:36067 2023/06/21 04:03:04 checking machine... 2023/06/21 04:03:04 checking revisions... [ 34.339759] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:03:04 testing simple program... [ 34.399142] cgroup: Unknown subsys name 'net' [ 34.442127] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:03:04 Registers: info registers vcpu 0 RAX=1ffffffff0b75cbd RBX=00000000fffffffd RCX=0000000000000000 RDX=ffff888016730000 RSI=ffffffff81210f39 RDI=ffffffff85bae5e8 RBP=ffffffff85bae5e0 RSP=ffff88800ca5fc00 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffffd R11=00000000000b6a61 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81210f53 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 00007fb48bb73900 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=00007fb48c12a618 CR3=0000000015cea000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fb8212bd4c0 CR3=000000000d458000 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=213e5ae4f8c45c9f85426da4af9b343d XMM02=000000000011c2b0eff9b2d0a8fce9cb XMM03=000000000011c3802c67c8bc2e329bc3 XMM04=49fff8564401045500000000000ae988 XMM05=7d531bd1244b42280000000000134c30 XMM06=806171799158d9670000000000133cd0 XMM07=e042d86d42eb936e0000000000122f38 XMM08=c4906119266fb49f000000000011c380 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000