syzkaller login: [ 30.042454] BUG: Bad rss-counter state mm:00000000d2dafe28 type:MM_FILEPAGES val:33 [ 30.043529] BUG: Bad rss-counter state mm:00000000d2dafe28 type:MM_ANONPAGES val:22 [ 30.204435] ================================================================== [ 30.205104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.205774] Read of size 8 at addr ffff88800e0325c8 by task sshd/219 [ 30.206323] [ 30.206475] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.207111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.207803] Call Trace: [ 30.208034] [ 30.208334] dump_stack_lvl+0x91/0xf0 [ 30.208716] print_report+0xcc/0x620 [ 30.209055] ? __virt_addr_valid+0x102/0x340 [ 30.209450] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.209899] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.210339] kasan_report+0xbe/0xf0 [ 30.210698] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.211150] vma_interval_tree_remove+0xc75/0xec0 [ 30.211578] vma_prepare+0xc54/0x11a0 [ 30.211925] __split_vma+0x5af/0x950 [ 30.212270] ? __pfx___split_vma+0x10/0x10 [ 30.212646] ? find_held_lock+0x2c/0x110 [ 30.213014] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.213417] ? lock_is_held_type+0x9f/0x120 [ 30.213805] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.214231] ? mtree_range_walk+0x632/0x900 [ 30.214631] ? mas_walk+0x5c7/0x7c0 [ 30.214964] do_vmi_munmap+0x1f1/0x2b0 [ 30.215312] mmap_region+0x1f9/0x2660 [ 30.215654] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.216013] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.216515] ? __pfx_lock_acquire+0x10/0x10 [ 30.216892] ? __pfx_mmap_region+0x10/0x10 [ 30.217268] ? security_mmap_addr+0x7d/0xa0 [ 30.217641] ? get_unmapped_area+0x1f5/0x3f0 [ 30.218029] do_mmap+0x854/0xf00 [ 30.218339] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.218707] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.219101] ksys_mmap_pgoff+0x3af/0x500 [ 30.219468] do_syscall_64+0x3f/0x90 [ 30.219801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.220259] RIP: 0033:0x7fd71e566d82 [ 30.220585] 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 [ 30.222083] RSP: 002b:00007ffcc48e5678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.222738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd71e566d82 [ 30.223336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd71d9a0000 [ 30.223930] RBP: 00007fd71d9a0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.224538] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561885c19f60 [ 30.225133] R13: 00007ffcc48e5690 R14: 00007ffcc48e56c0 R15: 00007ffcc48e5a20 [ 30.225743] [ 30.225946] [ 30.226099] Allocated by task 212: [ 30.226399] kasan_save_stack+0x22/0x50 [ 30.227019] kasan_set_track+0x25/0x30 [ 30.227640] __kasan_slab_alloc+0x59/0x70 [ 30.228284] kmem_cache_alloc+0x16b/0x370 [ 30.228923] vm_area_dup+0x20/0x160 [ 30.229485] __split_vma+0x170/0x950 [ 30.230060] split_vma+0xc6/0x110 [ 30.230637] mprotect_fixup+0x8d2/0xb30 [ 30.231248] do_mprotect_pkey+0x87e/0xd40 [ 30.231894] __x64_sys_mprotect+0x78/0xc0 [ 30.232527] do_syscall_64+0x3f/0x90 [ 30.233107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.233894] [ 30.234160] Freed by task 212: [ 30.234650] kasan_save_stack+0x22/0x50 [ 30.235274] kasan_set_track+0x25/0x30 [ 30.235878] kasan_save_free_info+0x2b/0x50 [ 30.236537] __kasan_slab_free+0x10a/0x190 [ 30.237199] kmem_cache_free+0x10d/0x4d0 [ 30.237826] rcu_core+0x8c8/0x2860 [ 30.238376] __do_softirq+0x1b7/0x7d4 [ 30.238973] [ 30.239240] Last potentially related work creation: [ 30.239963] kasan_save_stack+0x22/0x50 [ 30.240579] __kasan_record_aux_stack+0x8e/0xa0 [ 30.241277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.242066] remove_vma+0x139/0x170 [ 30.242644] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.243277] do_vmi_munmap+0x1f1/0x2b0 [ 30.243805] __vm_munmap+0x138/0x3a0 [ 30.244309] __x64_sys_munmap+0x59/0x80 [ 30.244838] do_syscall_64+0x3f/0x90 [ 30.245346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.246028] [ 30.246263] Second to last potentially related work creation: [ 30.246996] kasan_save_stack+0x22/0x50 [ 30.247531] __kasan_record_aux_stack+0x8e/0xa0 [ 30.248143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.248831] remove_vma+0x139/0x170 [ 30.249320] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.249979] do_vmi_munmap+0x1f1/0x2b0 [ 30.250496] mmap_region+0x1f9/0x2660 [ 30.251023] do_mmap+0x854/0xf00 [ 30.251485] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.252013] ksys_mmap_pgoff+0x3af/0x500 [ 30.252550] do_syscall_64+0x3f/0x90 [ 30.253060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.253741] [ 30.253976] The buggy address belongs to the object at ffff88800e032570 [ 30.253976] which belongs to the cache vm_area_struct of size 168 [ 30.255548] The buggy address is located 88 bytes inside of [ 30.255548] freed 168-byte region [ffff88800e032570, ffff88800e032618) [ 30.257049] [ 30.257276] The buggy address belongs to the physical page: [ 30.257973] page:000000004b7a8f7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe032 [ 30.259145] memcg:ffff88800e623b01 [ 30.259601] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.260345] page_type: 0xffffffff() [ 30.260823] raw: 0100000000000200 ffff88800879fc80 ffffea0000365840 dead000000000007 [ 30.261800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e623b01 [ 30.262791] page dumped because: kasan: bad access detected [ 30.263500] [ 30.263730] Memory state around the buggy address: [ 30.264344] ffff88800e032480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.265251] ffff88800e032500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.266154] >ffff88800e032580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.267070] ^ [ 30.267768] ffff88800e032600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.268679] ffff88800e032680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.269576] ================================================================== [ 30.270736] Disabling lock debugging due to kernel taint [ 32.935427] BUG: Bad rss-counter state mm:0000000060a6e2a7 type:MM_FILEPAGES val:33 [ 32.936336] BUG: Bad rss-counter state mm:0000000060a6e2a7 type:MM_ANONPAGES val:22 [ 33.362757] BUG: Bad rss-counter state mm:000000009c5b19ae type:MM_FILEPAGES val:33 [ 33.364144] BUG: Bad rss-counter state mm:000000009c5b19ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2507' (ECDSA) to the list of known hosts. 2023/06/19 12:29:43 fuzzer started 2023/06/19 12:29:44 dialing manager at localhost:44161 2023/06/19 12:29:44 checking machine... 2023/06/19 12:29:44 checking revisions... [ 34.088258] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:29:44 testing simple program... [ 34.137693] cgroup: Unknown subsys name 'net' [ 34.175813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:29:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014579000 RCX=0000000000000000 RDX=1ffff110028af27c RSI=ffffffff8369a15b RDI=ffff8880145793e0 RBP=0000000000000000 RSP=ffff88801683f8e0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff8880143cb400 R13=ffff88801683fb68 R14=ffffffff818be6f0 R15=0000000000000000 RIP=ffffffff8369a189 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 00007f45af7cb900 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=00007fff8318d000 CR3=000000000fc30000 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=1ffffffff0bbf9fe RBX=ffffffff85dfcff0 RCX=ffffffff8180f43a RDX=0000000000000000 RSI=ffffffff86137dcc RDI=ffffffff85dfcfd4 RBP=ffffffff85dfcfd4 RSP=ffff88806cf099e0 R8 =ffffffff86137dcc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffffffff85dfd010 R13=ffffffff85dfcfd4 R14=ffffffff85dfcfd4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 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=00007f7ca07de000 CR3=000000000df54000 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=2033343a39323a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a39323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000