syzkaller login: [ 32.159104] BUG: Bad rss-counter state mm:000000008a32df31 type:MM_FILEPAGES val:33 [ 32.160309] BUG: Bad rss-counter state mm:000000008a32df31 type:MM_ANONPAGES val:22 [ 32.198768] ================================================================== [ 32.199690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.200633] Read of size 8 at addr ffff88800e5cf228 by task sshd/219 [ 32.201489] [ 32.201711] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.202601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.203593] Call Trace: [ 32.203917] [ 32.204205] dump_stack_lvl+0x91/0xf0 [ 32.204703] print_report+0xcc/0x620 [ 32.205207] ? __virt_addr_valid+0x102/0x340 [ 32.205766] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.206434] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.207074] kasan_report+0xbe/0xf0 [ 32.207555] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.208206] vma_interval_tree_remove+0xc75/0xec0 [ 32.208845] vma_prepare+0xc54/0x11a0 [ 32.209366] __split_vma+0x5af/0x950 [ 32.209882] ? __pfx___split_vma+0x10/0x10 [ 32.210461] ? find_held_lock+0x2c/0x110 [ 32.211021] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.211623] ? lock_is_held_type+0x9f/0x120 [ 32.212208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.212851] ? mtree_range_walk+0x632/0x900 [ 32.213455] ? mas_walk+0x5c7/0x7c0 [ 32.213970] do_vmi_munmap+0x1f1/0x2b0 [ 32.214499] mmap_region+0x1f9/0x2660 [ 32.215012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.215567] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.216333] ? __pfx_lock_acquire+0x10/0x10 [ 32.216903] ? __pfx_mmap_region+0x10/0x10 [ 32.217478] ? security_mmap_addr+0x7d/0xa0 [ 32.218072] ? get_unmapped_area+0x1f5/0x3f0 [ 32.218657] do_mmap+0x854/0xf00 [ 32.219125] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.219659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.220268] ksys_mmap_pgoff+0x3af/0x500 [ 32.220809] do_syscall_64+0x3f/0x90 [ 32.221325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.222038] RIP: 0033:0x7f1a1e7ddd82 [ 32.222534] 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 [ 32.224850] RSP: 002b:00007ffc4336e728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.225820] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a1e7ddd82 [ 32.226762] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a1dc17000 [ 32.227673] RBP: 00007f1a1dc17000 R08: 0000000000000009 R09: 0000000000001000 [ 32.228590] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558941bb2b20 [ 32.229501] R13: 00007ffc4336e740 R14: 00007ffc4336e770 R15: 00007ffc4336ead0 [ 32.230433] [ 32.230753] [ 32.230982] Allocated by task 212: [ 32.231443] kasan_save_stack+0x22/0x50 [ 32.231977] kasan_set_track+0x25/0x30 [ 32.232504] __kasan_slab_alloc+0x59/0x70 [ 32.233065] kmem_cache_alloc+0x16b/0x370 [ 32.233618] vm_area_dup+0x20/0x160 [ 32.234114] __split_vma+0x170/0x950 [ 32.234610] split_vma+0xc6/0x110 [ 32.235087] mprotect_fixup+0x8d2/0xb30 [ 32.235630] do_mprotect_pkey+0x87e/0xd40 [ 32.236189] __x64_sys_mprotect+0x78/0xc0 [ 32.236747] do_syscall_64+0x3f/0x90 [ 32.237256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.237954] [ 32.238186] Freed by task 212: [ 32.238608] kasan_save_stack+0x22/0x50 [ 32.239147] kasan_set_track+0x25/0x30 [ 32.239679] kasan_save_free_info+0x2b/0x50 [ 32.240254] __kasan_slab_free+0x10a/0x190 [ 32.240826] kmem_cache_free+0x10d/0x4d0 [ 32.241377] rcu_core+0x8c8/0x2860 [ 32.241863] __do_softirq+0x1b7/0x7d4 [ 32.242385] [ 32.242614] Last potentially related work creation: [ 32.243249] kasan_save_stack+0x22/0x50 [ 32.243784] __kasan_record_aux_stack+0x8e/0xa0 [ 32.244410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.245099] remove_vma+0x139/0x170 [ 32.245578] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.246189] do_vmi_munmap+0x1f1/0x2b0 [ 32.246715] __vm_munmap+0x138/0x3a0 [ 32.247212] __x64_sys_munmap+0x59/0x80 [ 32.247737] do_syscall_64+0x3f/0x90 [ 32.248241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.248920] [ 32.249146] Second to last potentially related work creation: [ 32.249894] kasan_save_stack+0x22/0x50 [ 32.250460] __kasan_record_aux_stack+0x8e/0xa0 [ 32.251065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.251762] remove_vma+0x139/0x170 [ 32.252246] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.252845] do_vmi_munmap+0x1f1/0x2b0 [ 32.253367] mmap_region+0x1f9/0x2660 [ 32.253878] do_mmap+0x854/0xf00 [ 32.254352] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.254875] ksys_mmap_pgoff+0x3af/0x500 [ 32.255409] do_syscall_64+0x3f/0x90 [ 32.255921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.256609] [ 32.256841] The buggy address belongs to the object at ffff88800e5cf1d0 [ 32.256841] which belongs to the cache vm_area_struct of size 168 [ 32.258428] The buggy address is located 88 bytes inside of [ 32.258428] freed 168-byte region [ffff88800e5cf1d0, ffff88800e5cf278) [ 32.259953] [ 32.260186] The buggy address belongs to the physical page: [ 32.260897] page:0000000038e43c44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5cf [ 32.262078] memcg:ffff88800d284101 [ 32.262531] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.263216] page_type: 0xffffffff() [ 32.263692] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.264676] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d284101 [ 32.265650] page dumped because: kasan: bad access detected [ 32.266365] [ 32.266591] Memory state around the buggy address: [ 32.267206] ffff88800e5cf100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.268117] ffff88800e5cf180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.269025] >ffff88800e5cf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.269953] ^ [ 32.270545] ffff88800e5cf280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.271455] ffff88800e5cf300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.272352] ================================================================== [ 32.273443] Disabling lock debugging due to kernel taint [ 34.235235] BUG: Bad rss-counter state mm:00000000e1f390e2 type:MM_FILEPAGES val:33 [ 34.236491] BUG: Bad rss-counter state mm:00000000e1f390e2 type:MM_ANONPAGES val:22 [ 34.625786] BUG: Bad rss-counter state mm:000000001b9fda63 type:MM_FILEPAGES val:33 [ 34.626779] BUG: Bad rss-counter state mm:000000001b9fda63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57560' (ECDSA) to the list of known hosts. 2023/06/19 21:16:40 fuzzer started 2023/06/19 21:16:41 dialing manager at localhost:44161 2023/06/19 21:16:41 checking machine... 2023/06/19 21:16:41 checking revisions... [ 35.323568] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:16:41 testing simple program... [ 35.383180] cgroup: Unknown subsys name 'net' [ 35.449735] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:16:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff813782a8 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d6b57a0 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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=00007fcd23231720 CR3=000000000f1e4000 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=2030343a36313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a36313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055f8e4bac350 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=00007f8ac82d9968 RBP=000055f8e4bcc810 RSP=00007fff1520b098 R8 =0000000000000000 R9 =00007fff1520ae10 R10=000000000000002c R11=0000000000000202 R12=00007f8ac7ae1340 R13=0000000000000000 R14=00007fff1520b490 R15=00007fff1520b240 RIP=00007f8ac7ae1a7b RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8ac7737900 00000000 00000000 GS =0000 0000000000000000 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=000055f8e4baff40 CR3=0000000009c22000 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