syzkaller login: [ 29.953253] BUG: Bad rss-counter state mm:00000000ad0e3e41 type:MM_FILEPAGES val:33 [ 29.954083] BUG: Bad rss-counter state mm:00000000ad0e3e41 type:MM_ANONPAGES val:22 [ 30.094918] ================================================================== [ 30.095581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.096253] Read of size 8 at addr ffff88800dc2f798 by task sshd/218 [ 30.096748] [ 30.096888] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.097438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.098062] Call Trace: [ 30.098269] [ 30.098452] dump_stack_lvl+0x91/0xf0 [ 30.098774] print_report+0xcc/0x620 [ 30.099499] ? __virt_addr_valid+0x102/0x340 [ 30.100529] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.101729] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.102914] kasan_report+0xbe/0xf0 [ 30.103491] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.103948] vma_interval_tree_remove+0xc75/0xec0 [ 30.104395] vma_prepare+0xc54/0x11a0 [ 30.104744] __split_vma+0x5af/0x950 [ 30.105084] ? __pfx___split_vma+0x10/0x10 [ 30.105474] ? find_held_lock+0x2c/0x110 [ 30.105846] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.106281] ? lock_is_held_type+0x9f/0x120 [ 30.106687] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.107127] ? mtree_range_walk+0x632/0x900 [ 30.107552] ? mas_walk+0x5c7/0x7c0 [ 30.107908] do_vmi_munmap+0x1f1/0x2b0 [ 30.108283] mmap_region+0x1f9/0x2660 [ 30.108637] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.109018] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.109547] ? __pfx_lock_acquire+0x10/0x10 [ 30.109946] ? __pfx_mmap_region+0x10/0x10 [ 30.110384] ? security_mmap_addr+0x7d/0xa0 [ 30.110788] ? get_unmapped_area+0x1f5/0x3f0 [ 30.111251] do_mmap+0x854/0xf00 [ 30.111588] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.111963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.112431] ksys_mmap_pgoff+0x3af/0x500 [ 30.112816] do_syscall_64+0x3f/0x90 [ 30.113178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.113654] RIP: 0033:0x7f9a449c5d82 [ 30.113986] 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 [ 30.115546] RSP: 002b:00007ffd08b5bfc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.116211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a449c5d82 [ 30.116826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a43dff000 [ 30.117482] RBP: 00007f9a43dff000 R08: 0000000000000009 R09: 0000000000001000 [ 30.118090] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557306620d90 [ 30.118687] R13: 00007ffd08b5bfe0 R14: 00007ffd08b5c010 R15: 00007ffd08b5c370 [ 30.119345] [ 30.119557] [ 30.119714] Allocated by task 211: [ 30.120015] kasan_save_stack+0x22/0x50 [ 30.120428] kasan_set_track+0x25/0x30 [ 30.120791] __kasan_slab_alloc+0x59/0x70 [ 30.121179] kmem_cache_alloc+0x16b/0x370 [ 30.121572] vm_area_dup+0x20/0x160 [ 30.121896] __split_vma+0x170/0x950 [ 30.122231] split_vma+0xc6/0x110 [ 30.122589] mprotect_fixup+0x8d2/0xb30 [ 30.122954] do_mprotect_pkey+0x87e/0xd40 [ 30.123360] __x64_sys_mprotect+0x78/0xc0 [ 30.123733] do_syscall_64+0x3f/0x90 [ 30.124072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.124540] [ 30.124699] Freed by task 211: [ 30.124980] kasan_save_stack+0x22/0x50 [ 30.125370] kasan_set_track+0x25/0x30 [ 30.125726] kasan_save_free_info+0x2b/0x50 [ 30.126107] __kasan_slab_free+0x10a/0x190 [ 30.126532] kmem_cache_free+0x10d/0x4d0 [ 30.126895] rcu_core+0x8c8/0x2860 [ 30.127228] __do_softirq+0x1b7/0x7d4 [ 30.127575] [ 30.127735] Last potentially related work creation: [ 30.128157] kasan_save_stack+0x22/0x50 [ 30.128547] __kasan_record_aux_stack+0x8e/0xa0 [ 30.128956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.129456] remove_vma+0x139/0x170 [ 30.129792] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.130196] do_vmi_munmap+0x1f1/0x2b0 [ 30.130546] __vm_munmap+0x138/0x3a0 [ 30.130879] __x64_sys_munmap+0x59/0x80 [ 30.131269] do_syscall_64+0x3f/0x90 [ 30.131640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.132099] [ 30.132257] The buggy address belongs to the object at ffff88800dc2f740 [ 30.132257] which belongs to the cache vm_area_struct of size 168 [ 30.133483] The buggy address is located 88 bytes inside of [ 30.133483] freed 168-byte region [ffff88800dc2f740, ffff88800dc2f7e8) [ 30.134596] [ 30.134758] The buggy address belongs to the physical page: [ 30.135261] page:00000000f3fd486b refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800dc2f0e8 pfn:0xdc2f [ 30.136181] memcg:ffff88801a093701 [ 30.136492] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.136974] page_type: 0xffffffff() [ 30.137351] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a5b80 dead000000000004 [ 30.138031] raw: ffff88800dc2f0e8 000000008011000e 00000001ffffffff ffff88801a093701 [ 30.138716] page dumped because: kasan: bad access detected [ 30.139249] [ 30.139419] Memory state around the buggy address: [ 30.139861] ffff88800dc2f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.140498] ffff88800dc2f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.141237] >ffff88800dc2f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.141884] ^ [ 30.142252] ffff88800dc2f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.142929] ffff88800dc2f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.143566] ================================================================== [ 30.144491] Disabling lock debugging due to kernel taint [ 31.730935] BUG: Bad rss-counter state mm:0000000044cd97f4 type:MM_FILEPAGES val:33 [ 31.731762] BUG: Bad rss-counter state mm:0000000044cd97f4 type:MM_ANONPAGES val:22 [ 32.171241] BUG: Bad rss-counter state mm:000000009042b587 type:MM_FILEPAGES val:33 [ 32.172500] BUG: Bad rss-counter state mm:000000009042b587 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42676' (ECDSA) to the list of known hosts. 2023/06/21 08:10:43 fuzzer started 2023/06/21 08:10:43 dialing manager at localhost:36067 2023/06/21 08:10:43 checking machine... 2023/06/21 08:10:43 checking revisions... [ 32.710581] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:10:43 testing simple program... [ 32.768866] cgroup: Unknown subsys name 'net' [ 32.807657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:10:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83636c05 RDX=000000000002636c RSI=000000000002636c RDI=ffffffff865827a0 RBP=ffff8880158176d8 RSP=ffff888015817610 R8 =0000000000000000 R9 =ffff8880158176c0 R10=0000000000038001 R11=0000000000091bda R12=ffff8880158176e0 R13=ffff8880158176c8 R14=ffff8880158176c1 R15=ffff888015817680 RIP=ffffffff8113077a 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 00007f136e33e900 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=00007ffc2a32b000 CR3=000000000c720000 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=6720646572637465733a4d41503d706f 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 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=ffff888008c04400 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=00007efd116c35c0 CR3=000000000c59e000 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=62f8cd1694dad48ed5405a7fa7d8a7b5 XMM02=ec2efd57dc4c00df000000000011a758 XMM03=16b0f7e02c6bbe58000000000011a828 XMM04=f31b9d22f097f76600000000000ae988 XMM05=dfcdbad4f1609c370000000000130578 XMM06=30675c49e645e097000000000012f750 XMM07=e042d86d42eb936e0000000000120cf8 XMM08=16b0f7e02c6bbe58000000000011a828 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000