[ 31.009099] BUG: Bad rss-counter state mm:00000000338f1818 type:MM_FILEPAGES val:33 [ 31.011020] BUG: Bad rss-counter state mm:00000000338f1818 type:MM_ANONPAGES val:22 [ 31.171748] ================================================================== [ 31.172645] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.173518] Read of size 8 at addr ffff88801657ca50 by task sshd/220 [ 31.174239] [ 31.174638] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.175474] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.176385] Call Trace: [ 31.176684] [ 31.176952] dump_stack_lvl+0x91/0xf0 [ 31.177414] print_report+0xcc/0x620 [ 31.177877] ? __virt_addr_valid+0x102/0x340 [ 31.178399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.178982] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.179569] kasan_report+0xbe/0xf0 [ 31.180025] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.180617] vma_interval_tree_remove+0xc75/0xec0 [ 31.181193] vma_prepare+0xc54/0x11a0 [ 31.181646] __split_vma+0x5af/0x950 [ 31.182095] ? __pfx___split_vma+0x10/0x10 [ 31.182618] ? find_held_lock+0x2c/0x110 [ 31.183168] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.183723] ? lock_is_held_type+0x9f/0x120 [ 31.184271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.184867] ? mtree_range_walk+0x632/0x900 [ 31.185420] ? mas_walk+0x5c7/0x7c0 [ 31.185894] do_vmi_munmap+0x1f1/0x2b0 [ 31.186380] mmap_region+0x1f9/0x2660 [ 31.186857] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.187383] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.188097] ? __pfx_lock_acquire+0x10/0x10 [ 31.188632] ? __pfx_mmap_region+0x10/0x10 [ 31.189165] ? security_mmap_addr+0x7d/0xa0 [ 31.189692] ? get_unmapped_area+0x1f5/0x3f0 [ 31.190245] do_mmap+0x854/0xf00 [ 31.190677] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.191185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.191745] ksys_mmap_pgoff+0x3af/0x500 [ 31.192260] do_syscall_64+0x3f/0x90 [ 31.192747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.193387] RIP: 0033:0x7f2ed109cd82 [ 31.193833] 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 [ 31.196001] RSP: 002b:00007ffc7d12c678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.196914] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ed109cd82 [ 31.197763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ed04d6000 [ 31.198614] RBP: 00007f2ed04d6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.199476] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ce49ceec0 [ 31.200331] R13: 00007ffc7d12c690 R14: 00007ffc7d12c6c0 R15: 00007ffc7d12ca20 [ 31.201195] [ 31.201491] [ 31.201708] Allocated by task 213: [ 31.202145] kasan_save_stack+0x22/0x50 [ 31.202642] kasan_set_track+0x25/0x30 [ 31.203140] __kasan_slab_alloc+0x59/0x70 [ 31.203663] kmem_cache_alloc+0x16b/0x370 [ 31.204170] vm_area_dup+0x20/0x160 [ 31.204625] __split_vma+0x170/0x950 [ 31.205098] split_vma+0xc6/0x110 [ 31.205527] mprotect_fixup+0x8d2/0xb30 [ 31.206023] do_mprotect_pkey+0x87e/0xd40 [ 31.206537] __x64_sys_mprotect+0x78/0xc0 [ 31.207070] do_syscall_64+0x3f/0x90 [ 31.207548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208195] [ 31.208406] Freed by task 213: [ 31.208794] kasan_save_stack+0x22/0x50 [ 31.209305] kasan_set_track+0x25/0x30 [ 31.209786] kasan_save_free_info+0x2b/0x50 [ 31.210304] __kasan_slab_free+0x10a/0x190 [ 31.210839] kmem_cache_free+0x10d/0x4d0 [ 31.211345] rcu_core+0x8c8/0x2860 [ 31.211787] __do_softirq+0x1b7/0x7d4 [ 31.212270] [ 31.212481] Last potentially related work creation: [ 31.213077] kasan_save_stack+0x22/0x50 [ 31.213570] __kasan_record_aux_stack+0x8e/0xa0 [ 31.214135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.214776] remove_vma+0x139/0x170 [ 31.215247] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.215795] do_vmi_munmap+0x1f1/0x2b0 [ 31.216286] __vm_munmap+0x138/0x3a0 [ 31.216751] __x64_sys_munmap+0x59/0x80 [ 31.217240] do_syscall_64+0x3f/0x90 [ 31.217712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218360] [ 31.218576] The buggy address belongs to the object at ffff88801657c9f8 [ 31.218576] which belongs to the cache vm_area_struct of size 168 [ 31.220083] The buggy address is located 88 bytes inside of [ 31.220083] freed 168-byte region [ffff88801657c9f8, ffff88801657caa0) [ 31.221494] [ 31.221711] The buggy address belongs to the physical page: [ 31.222373] page:00000000e1fa6cfb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1657c [ 31.223477] memcg:ffff88800d258001 [ 31.223905] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.224564] page_type: 0xffffffff() [ 31.225017] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.225939] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d258001 [ 31.226850] page dumped because: kasan: bad access detected [ 31.227526] [ 31.227738] Memory state around the buggy address: [ 31.228334] ffff88801657c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.229194] ffff88801657c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.230054] >ffff88801657ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.230903] ^ [ 31.231633] ffff88801657ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.232494] ffff88801657cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.233357] ================================================================== [ 31.234498] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.680652] BUG: Bad rss-counter state mm:00000000a252b0f5 type:MM_FILEPAGES val:33 [ 33.681585] BUG: Bad rss-counter state mm:00000000a252b0f5 type:MM_ANONPAGES val:22 [ 34.229893] BUG: Bad rss-counter state mm:0000000048d21194 type:MM_FILEPAGES val:33 [ 34.231128] BUG: Bad rss-counter state mm:0000000048d21194 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16425' (ECDSA) to the list of known hosts. 2023/06/21 03:49:09 fuzzer started 2023/06/21 03:49:09 dialing manager at localhost:36067 2023/06/21 03:49:09 checking machine... 2023/06/21 03:49:09 checking revisions... [ 34.871794] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:49:09 testing simple program... [ 34.919603] cgroup: Unknown subsys name 'net' [ 34.983373] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:49:09 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f328b80 RCX=1ffff11001e65208 RDX=1ffff11001e651b6 RSI=0000000000000004 RDI=ffff88800ff8faa8 RBP=1ffff11001ff1f76 RSP=ffff88800ff8fb38 R8 =0000000000000001 R9 =ffffed1001ff1f55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f328d98 R13=0000000000000000 R14=ffff88800f328000 R15=ffff88800f328b80 RIP=ffffffff8302b452 RFL=00000046 [---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=00007faedcd349c0 CR3=00000000147e8000 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=2038303a39343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39343a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c252be RBX=0000000000000001 RCX=ffffffff861295f2 RDX=0000000000000001 RSI=dffffc0000000000 RDI=ffffffff861295f4 RBP=ffff88801643f0a8 RSP=ffff88801643efe0 R8 =ffffffff861295f6 R9 =ffff88801643f090 R10=0000000000038001 R11=000000000001e427 R12=ffff88801643f0b0 R13=ffff88801643f098 R14=ffff88801643fdd0 R15=ffff88801643f050 RIP=ffffffff811311c3 RFL=00000217 [----APC] 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 00007f66fc0eb900 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=0000560f22db1b88 CR3=0000000009348000 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