syzkaller login: [ 60.014746] BUG: Bad rss-counter state mm:00000000f73dbca0 type:MM_FILEPAGES val:33 [ 60.015921] BUG: Bad rss-counter state mm:00000000f73dbca0 type:MM_ANONPAGES val:22 [ 60.148509] ================================================================== [ 60.149616] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.150766] Read of size 8 at addr ffff888009a28df0 by task sshd/220 [ 60.151696] [ 60.151921] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.152790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.153796] Call Trace: [ 60.154117] [ 60.154405] dump_stack_lvl+0x91/0xf0 [ 60.154905] print_report+0xcc/0x620 [ 60.155388] ? __virt_addr_valid+0x102/0x340 [ 60.155972] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.156603] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.157221] kasan_report+0xbe/0xf0 [ 60.157699] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.158367] vma_interval_tree_remove+0xc75/0xec0 [ 60.158976] vma_prepare+0xc54/0x11a0 [ 60.159455] __split_vma+0x5af/0x950 [ 60.159926] ? __pfx___split_vma+0x10/0x10 [ 60.160458] ? find_held_lock+0x2c/0x110 [ 60.161007] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.161585] ? lock_is_held_type+0x9f/0x120 [ 60.162170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.162809] ? mtree_range_walk+0x632/0x900 [ 60.163378] ? mas_walk+0x5c7/0x7c0 [ 60.163858] do_vmi_munmap+0x1f1/0x2b0 [ 60.164354] mmap_region+0x1f9/0x2660 [ 60.164842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.165358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.166096] ? __pfx_lock_acquire+0x10/0x10 [ 60.166637] ? __pfx_mmap_region+0x10/0x10 [ 60.167173] ? security_mmap_addr+0x7d/0xa0 [ 60.167707] ? get_unmapped_area+0x1f5/0x3f0 [ 60.168261] do_mmap+0x854/0xf00 [ 60.168699] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.169194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.169781] ksys_mmap_pgoff+0x3af/0x500 [ 60.170297] do_syscall_64+0x3f/0x90 [ 60.170782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.171437] RIP: 0033:0x7f844ba9ad82 [ 60.171901] 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 [ 60.174073] RSP: 002b:00007ffe85edf6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.174986] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f844ba9ad82 [ 60.175856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f844aed4000 [ 60.176769] RBP: 00007f844aed4000 R08: 0000000000000009 R09: 0000000000001000 [ 60.177624] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560adef8bb20 [ 60.178501] R13: 00007ffe85edf6d0 R14: 00007ffe85edf700 R15: 00007ffe85edfa60 [ 60.179367] [ 60.179673] [ 60.179888] Allocated by task 213: [ 60.180323] kasan_save_stack+0x22/0x50 [ 60.180836] kasan_set_track+0x25/0x30 [ 60.181347] __kasan_slab_alloc+0x59/0x70 [ 60.181885] kmem_cache_alloc+0x16b/0x370 [ 60.182413] vm_area_dup+0x20/0x160 [ 60.182884] __split_vma+0x170/0x950 [ 60.183351] split_vma+0xc6/0x110 [ 60.183806] mprotect_fixup+0x8d2/0xb30 [ 60.184323] do_mprotect_pkey+0x87e/0xd40 [ 60.184851] __x64_sys_mprotect+0x78/0xc0 [ 60.185385] do_syscall_64+0x3f/0x90 [ 60.185875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.186528] [ 60.186742] Freed by task 213: [ 60.187140] kasan_save_stack+0x22/0x50 [ 60.187661] kasan_set_track+0x25/0x30 [ 60.188168] kasan_save_free_info+0x2b/0x50 [ 60.188710] __kasan_slab_free+0x10a/0x190 [ 60.189249] kmem_cache_free+0x10d/0x4d0 [ 60.189782] rcu_core+0x8c8/0x2860 [ 60.190234] __do_softirq+0x1b7/0x7d4 [ 60.190715] [ 60.190934] Last potentially related work creation: [ 60.191530] kasan_save_stack+0x22/0x50 [ 60.192091] __kasan_record_aux_stack+0x8e/0xa0 [ 60.192684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.193343] remove_vma+0x139/0x170 [ 60.193811] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.194370] do_vmi_munmap+0x1f1/0x2b0 [ 60.194866] __vm_munmap+0x138/0x3a0 [ 60.195347] __x64_sys_munmap+0x59/0x80 [ 60.195852] do_syscall_64+0x3f/0x90 [ 60.196336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.197020] [ 60.197241] The buggy address belongs to the object at ffff888009a28d98 [ 60.197241] which belongs to the cache vm_area_struct of size 168 [ 60.198786] The buggy address is located 88 bytes inside of [ 60.198786] freed 168-byte region [ffff888009a28d98, ffff888009a28e40) [ 60.200198] [ 60.200412] The buggy address belongs to the physical page: [ 60.201075] page:00000000e9d1de4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a28 [ 60.202166] memcg:ffff88800ed40c01 [ 60.202594] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.203299] page_type: 0xffffffff() [ 60.203759] raw: 0100000000000200 ffff8880087a0c80 ffffea0000252f80 dead000000000003 [ 60.204689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed40c01 [ 60.205605] page dumped because: kasan: bad access detected [ 60.206280] [ 60.206501] Memory state around the buggy address: [ 60.207090] ffff888009a28c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 60.207953] ffff888009a28d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 60.208830] >ffff888009a28d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.209684] ^ [ 60.210519] ffff888009a28e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.211378] ffff888009a28e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.212256] ================================================================== [ 60.213423] Disabling lock debugging due to kernel taint [ 61.999285] BUG: Bad rss-counter state mm:00000000aa5c8156 type:MM_FILEPAGES val:33 [ 61.999997] BUG: Bad rss-counter state mm:00000000aa5c8156 type:MM_ANONPAGES val:22 [ 62.522220] BUG: Bad rss-counter state mm:000000003c25ba6c type:MM_FILEPAGES val:33 [ 62.523411] BUG: Bad rss-counter state mm:000000003c25ba6c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53278' (ECDSA) to the list of known hosts. 2023/06/21 00:47:52 fuzzer started 2023/06/21 00:47:53 dialing manager at localhost:36067 2023/06/21 00:47:53 checking machine... 2023/06/21 00:47:53 checking revisions... [ 63.145016] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:47:53 testing simple program... [ 63.191233] cgroup: Unknown subsys name 'net' [ 63.229275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:47:52 Registers: info registers vcpu 0 RAX=ffffffff8121b48b RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d9fe01 RSI=ffff888008d9fec8 RDI=ffff888008d9fec8 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff860a12fa R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fed0 R15=ffff888008d9f978 RIP=ffffffff81131041 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 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=00007ffdc1213818 CR3=000000000dbb0000 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=2032353a37343a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a37343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000800000 RCX=0000000000000000 RDX=1ffff11001ea700a RSI=ffffffff81b3b92f RDI=ffff88800f538050 RBP=ffff888015f4f428 RSP=ffff88801582f798 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888008ac4938 R14=ffff888015f4efa8 R15=ffff88801582f8c0 RIP=ffffffff81b3b96e 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7f0e6d2900 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=00007f7f0db1cc60 CR3=000000000c6ce000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a71890bee0c81a2600000000000ae988 XMM05=f46b49c37d4a12650000000000132b80 XMM06=4fda316b135da52b0000000000131970 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000