syzkaller login: [ 31.552529] BUG: Bad rss-counter state mm:00000000183dc11e type:MM_FILEPAGES val:33 [ 31.553954] BUG: Bad rss-counter state mm:00000000183dc11e type:MM_ANONPAGES val:22 [ 31.707913] ================================================================== [ 31.708839] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.709778] Read of size 8 at addr ffff88800fdd3880 by task sshd/220 [ 31.710554] [ 31.710962] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.711833] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.712821] Call Trace: [ 31.713164] [ 31.713458] dump_stack_lvl+0x91/0xf0 [ 31.713965] print_report+0xcc/0x620 [ 31.714455] ? __virt_addr_valid+0x102/0x340 [ 31.715017] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.715637] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716265] kasan_report+0xbe/0xf0 [ 31.716751] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.717375] vma_interval_tree_remove+0xc75/0xec0 [ 31.717982] vma_prepare+0xc54/0x11a0 [ 31.718466] __split_vma+0x5af/0x950 [ 31.718967] ? __pfx___split_vma+0x10/0x10 [ 31.719506] ? find_held_lock+0x2c/0x110 [ 31.720043] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.720608] ? lock_is_held_type+0x9f/0x120 [ 31.721158] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.721774] ? mtree_range_walk+0x632/0x900 [ 31.722327] ? mas_walk+0x5c7/0x7c0 [ 31.722810] do_vmi_munmap+0x1f1/0x2b0 [ 31.723310] mmap_region+0x1f9/0x2660 [ 31.723800] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.724317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.725040] ? __pfx_lock_acquire+0x10/0x10 [ 31.725581] ? __pfx_mmap_region+0x10/0x10 [ 31.726122] ? security_mmap_addr+0x7d/0xa0 [ 31.726663] ? get_unmapped_area+0x1f5/0x3f0 [ 31.727238] do_mmap+0x854/0xf00 [ 31.727675] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.728180] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.728752] ksys_mmap_pgoff+0x3af/0x500 [ 31.729265] do_syscall_64+0x3f/0x90 [ 31.729745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.730398] RIP: 0033:0x7ff2d9cf3d82 [ 31.730900] 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 [ 31.733145] RSP: 002b:00007ffe77124988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.734100] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2d9cf3d82 [ 31.735034] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2d912d000 [ 31.735934] RBP: 00007ff2d912d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.736816] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564265e8af70 [ 31.737695] R13: 00007ffe771249a0 R14: 00007ffe771249d0 R15: 00007ffe77124d30 [ 31.738603] [ 31.738919] [ 31.739146] Allocated by task 213: [ 31.739597] kasan_save_stack+0x22/0x50 [ 31.740136] kasan_set_track+0x25/0x30 [ 31.740663] __kasan_slab_alloc+0x59/0x70 [ 31.741217] kmem_cache_alloc+0x16b/0x370 [ 31.741757] vm_area_dup+0x20/0x160 [ 31.742230] __split_vma+0x170/0x950 [ 31.742737] split_vma+0xc6/0x110 [ 31.743202] mprotect_fixup+0x8d2/0xb30 [ 31.743729] do_mprotect_pkey+0x87e/0xd40 [ 31.744270] __x64_sys_mprotect+0x78/0xc0 [ 31.744816] do_syscall_64+0x3f/0x90 [ 31.745311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.745991] [ 31.746213] Freed by task 213: [ 31.746630] kasan_save_stack+0x22/0x50 [ 31.747175] kasan_set_track+0x25/0x30 [ 31.747690] kasan_save_free_info+0x2b/0x50 [ 31.748243] __kasan_slab_free+0x10a/0x190 [ 31.748805] kmem_cache_free+0x10d/0x4d0 [ 31.749339] rcu_core+0x8c8/0x2860 [ 31.749807] __do_softirq+0x1b7/0x7d4 [ 31.750307] [ 31.750527] Last potentially related work creation: [ 31.751157] kasan_save_stack+0x22/0x50 [ 31.751718] __kasan_record_aux_stack+0x8e/0xa0 [ 31.752349] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.753016] remove_vma+0x139/0x170 [ 31.753493] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.754076] do_vmi_munmap+0x1f1/0x2b0 [ 31.754585] __vm_munmap+0x138/0x3a0 [ 31.755089] __x64_sys_munmap+0x59/0x80 [ 31.755619] do_syscall_64+0x3f/0x90 [ 31.756115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.756799] [ 31.757023] The buggy address belongs to the object at ffff88800fdd3828 [ 31.757023] which belongs to the cache vm_area_struct of size 168 [ 31.758573] The buggy address is located 88 bytes inside of [ 31.758573] freed 168-byte region [ffff88800fdd3828, ffff88800fdd38d0) [ 31.760065] [ 31.760287] The buggy address belongs to the physical page: [ 31.760988] page:00000000ef0a7783 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdd3 [ 31.762136] memcg:ffff88800dd6bc01 [ 31.762592] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.763301] page_type: 0xffffffff() [ 31.763780] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.764754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd6bc01 [ 31.765706] page dumped because: kasan: bad access detected [ 31.766404] [ 31.766629] Memory state around the buggy address: [ 31.767256] ffff88800fdd3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.768172] ffff88800fdd3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.769082] >ffff88800fdd3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.769982] ^ [ 31.770416] ffff88800fdd3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.771342] ffff88800fdd3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.772239] ================================================================== [ 31.773222] Disabling lock debugging due to kernel taint [ 34.332416] BUG: Bad rss-counter state mm:000000004e855051 type:MM_FILEPAGES val:33 [ 34.333595] BUG: Bad rss-counter state mm:000000004e855051 type:MM_ANONPAGES val:22 [ 34.716604] BUG: Bad rss-counter state mm:00000000e9dfddfd type:MM_FILEPAGES val:33 [ 34.717146] BUG: Bad rss-counter state mm:00000000e9dfddfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14516' (ECDSA) to the list of known hosts. 2023/06/21 01:42:06 fuzzer started 2023/06/21 01:42:06 dialing manager at localhost:36067 2023/06/21 01:42:06 checking machine... 2023/06/21 01:42:06 checking revisions... [ 35.326855] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:42:06 testing simple program... [ 35.375338] cgroup: Unknown subsys name 'net' [ 35.440948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:42:06 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=ffffffff81b33491 RDX=ffff88800c4a51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffea000070e9c0 RSP=ffff88800f39f250 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f39f638 R13=0000000000000114 R14=ffff88800f39f920 R15=0000000000000000 RIP=ffffffff814c086b 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 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=00007efd78783080 CR3=000000000ca42000 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=2035303a32343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a32343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007f8a2f535000 RCX=ffffffff8175cd77 RDX=ffff8880169351c0 RSI=0000000000000000 RDI=0000000000000007 RBP=000000000e368007 RSP=ffff88801cabf858 R8 =0000000000000007 R9 =0000000000000000 R10=000000000e368007 R11=0000000000000000 R12=000000000e368067 R13=1ffff11003957f16 R14=ffff888015a40bd0 R15=00007f8a2f535000 RIP=ffffffff814c086b 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 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=00007f8a2f31d328 CR3=000000000ca4c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000