[ 23.945639] BUG: Bad rss-counter state mm:000000001a535b46 type:MM_FILEPAGES val:33 [ 23.946639] BUG: Bad rss-counter state mm:000000001a535b46 type:MM_ANONPAGES val:22 [ 24.107743] ================================================================== [ 24.108651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.109614] Read of size 8 at addr ffff88800d5d13f8 by task sshd/219 [ 24.110385] [ 24.110607] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.111581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.112553] Call Trace: [ 24.112890] [ 24.113176] dump_stack_lvl+0x91/0xf0 [ 24.113697] print_report+0xcc/0x620 [ 24.114184] ? __virt_addr_valid+0x102/0x340 [ 24.114747] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.115362] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.115978] kasan_report+0xbe/0xf0 [ 24.116451] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.117083] vma_interval_tree_remove+0xc75/0xec0 [ 24.117684] vma_prepare+0xc54/0x11a0 [ 24.118163] __split_vma+0x5af/0x950 [ 24.118640] ? __pfx___split_vma+0x10/0x10 [ 24.119169] ? find_held_lock+0x2c/0x110 [ 24.119693] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.120257] ? lock_is_held_type+0x9f/0x120 [ 24.120806] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.121410] ? mtree_range_walk+0x632/0x900 [ 24.121961] ? mas_walk+0x5c7/0x7c0 [ 24.122439] do_vmi_munmap+0x1f1/0x2b0 [ 24.122930] mmap_region+0x1f9/0x2660 [ 24.123412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.123922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.124639] ? __pfx_lock_acquire+0x10/0x10 [ 24.125188] ? __pfx_mmap_region+0x10/0x10 [ 24.125720] ? security_mmap_addr+0x7d/0xa0 [ 24.126262] ? get_unmapped_area+0x1f5/0x3f0 [ 24.126814] do_mmap+0x854/0xf00 [ 24.127256] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.127752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.128320] ksys_mmap_pgoff+0x3af/0x500 [ 24.128843] do_syscall_64+0x3f/0x90 [ 24.129325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.129982] RIP: 0033:0x7f6db4463d82 [ 24.130444] 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 [ 24.132619] RSP: 002b:00007ffce4805b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.133549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6db4463d82 [ 24.134424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6db389d000 [ 24.135299] RBP: 00007f6db389d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.136174] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba10e4ed90 [ 24.137061] R13: 00007ffce4805b30 R14: 00007ffce4805b60 R15: 00007ffce4805ec0 [ 24.137949] [ 24.138254] [ 24.138476] Allocated by task 212: [ 24.138916] kasan_save_stack+0x22/0x50 [ 24.139440] kasan_set_track+0x25/0x30 [ 24.139954] __kasan_slab_alloc+0x59/0x70 [ 24.140498] kmem_cache_alloc+0x16b/0x370 [ 24.141042] vm_area_dup+0x20/0x160 [ 24.141513] __split_vma+0x170/0x950 [ 24.141997] split_vma+0xc6/0x110 [ 24.142448] mprotect_fixup+0x8d2/0xb30 [ 24.142972] do_mprotect_pkey+0x87e/0xd40 [ 24.143520] __x64_sys_mprotect+0x78/0xc0 [ 24.144058] do_syscall_64+0x3f/0x90 [ 24.144553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.145236] [ 24.145460] Freed by task 212: [ 24.145866] kasan_save_stack+0x22/0x50 [ 24.146394] kasan_set_track+0x25/0x30 [ 24.146910] kasan_save_free_info+0x2b/0x50 [ 24.147463] __kasan_slab_free+0x10a/0x190 [ 24.148019] kmem_cache_free+0x10d/0x4d0 [ 24.148543] rcu_core+0x8c8/0x2860 [ 24.149015] __do_softirq+0x1b7/0x7d4 [ 24.149513] [ 24.149737] Last potentially related work creation: [ 24.150344] kasan_save_stack+0x22/0x50 [ 24.150869] __kasan_record_aux_stack+0x8e/0xa0 [ 24.151462] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.152126] remove_vma+0x139/0x170 [ 24.152596] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.153287] do_vmi_munmap+0x1f1/0x2b0 [ 24.153790] __vm_munmap+0x138/0x3a0 [ 24.154276] __x64_sys_munmap+0x59/0x80 [ 24.154791] do_syscall_64+0x3f/0x90 [ 24.155294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.155960] [ 24.156189] Second to last potentially related work creation: [ 24.156923] kasan_save_stack+0x22/0x50 [ 24.157451] __kasan_record_aux_stack+0x8e/0xa0 [ 24.158052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.158725] remove_vma+0x139/0x170 [ 24.159196] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.159779] do_vmi_munmap+0x1f1/0x2b0 [ 24.160292] mmap_region+0x1f9/0x2660 [ 24.160800] do_mmap+0x854/0xf00 [ 24.161248] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.161753] ksys_mmap_pgoff+0x3af/0x500 [ 24.162275] do_syscall_64+0x3f/0x90 [ 24.162769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.163432] [ 24.163656] The buggy address belongs to the object at ffff88800d5d13a0 [ 24.163656] which belongs to the cache vm_area_struct of size 168 [ 24.165194] The buggy address is located 88 bytes inside of [ 24.165194] freed 168-byte region [ffff88800d5d13a0, ffff88800d5d1448) [ 24.166662] [ 24.166884] The buggy address belongs to the physical page: [ 24.167577] page:00000000c7fdd247 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5d1 [ 24.168730] memcg:ffff88800d321f01 [ 24.169181] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.169861] page_type: 0xffffffff() [ 24.170334] raw: 0100000000000200 ffff8880087a0c80 ffffea0000275280 dead000000000008 [ 24.171297] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d321f01 [ 24.172265] page dumped because: kasan: bad access detected [ 24.173104] [ 24.173362] Memory state around the buggy address: [ 24.174094] ffff88800d5d1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.175155] ffff88800d5d1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.176223] >ffff88800d5d1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.177296] ^ [ 24.178357] ffff88800d5d1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.179420] ffff88800d5d1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.180464] ================================================================== [ 24.181701] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.537410] BUG: Bad rss-counter state mm:00000000d7e1ab13 type:MM_FILEPAGES val:33 [ 26.538681] BUG: Bad rss-counter state mm:00000000d7e1ab13 type:MM_ANONPAGES val:22 [ 26.988001] BUG: Bad rss-counter state mm:00000000dd8ea14d type:MM_FILEPAGES val:33 [ 26.989454] BUG: Bad rss-counter state mm:00000000dd8ea14d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18282' (ECDSA) to the list of known hosts. 2023/06/20 20:27:47 fuzzer started 2023/06/20 20:27:47 dialing manager at localhost:36067 2023/06/20 20:27:47 checking machine... 2023/06/20 20:27:47 checking revisions... [ 27.756130] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:27:47 testing simple program... [ 27.810987] cgroup: Unknown subsys name 'net' [ 27.897934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:27:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f717b486af0 CR3=00000000101c0000 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=2036343a37323a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a37323a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff84499d43 RDX=ffff888015f98000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000007 RSP=ffff8880147c7060 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff8880147c7708 R15=0000000000000000 RIP=ffffffff814c0860 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 00007fbe27d77900 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=00007fbe27d21008 CR3=000000000e9c4000 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