syzkaller login: [ 31.105732] BUG: Bad rss-counter state mm:00000000ad59acfa type:MM_FILEPAGES val:33 [ 31.106480] BUG: Bad rss-counter state mm:00000000ad59acfa type:MM_ANONPAGES val:22 [ 31.136069] ================================================================== [ 31.136762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.137540] Read of size 8 at addr ffff88800c543798 by task sshd/218 [ 31.138127] [ 31.138279] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.138964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.139659] Call Trace: [ 31.139907] [ 31.140191] dump_stack_lvl+0x91/0xf0 [ 31.140606] print_report+0xcc/0x620 [ 31.140931] ? __virt_addr_valid+0x102/0x340 [ 31.141306] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141739] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142168] kasan_report+0xbe/0xf0 [ 31.142502] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142930] vma_interval_tree_remove+0xc75/0xec0 [ 31.143320] vma_prepare+0xc54/0x11a0 [ 31.143652] __split_vma+0x5af/0x950 [ 31.144024] ? __pfx___split_vma+0x10/0x10 [ 31.144407] ? find_held_lock+0x2c/0x110 [ 31.144781] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.145179] ? lock_is_held_type+0x9f/0x120 [ 31.145565] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.145995] ? mtree_range_walk+0x632/0x900 [ 31.146383] ? mas_walk+0x5c7/0x7c0 [ 31.146725] do_vmi_munmap+0x1f1/0x2b0 [ 31.147071] mmap_region+0x1f9/0x2660 [ 31.147424] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.147785] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.148311] ? __pfx_lock_acquire+0x10/0x10 [ 31.148683] ? __pfx_mmap_region+0x10/0x10 [ 31.149064] ? security_mmap_addr+0x7d/0xa0 [ 31.149443] ? get_unmapped_area+0x1f5/0x3f0 [ 31.149832] do_mmap+0x854/0xf00 [ 31.150142] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.150493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.150903] ksys_mmap_pgoff+0x3af/0x500 [ 31.151269] do_syscall_64+0x3f/0x90 [ 31.151611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152101] RIP: 0033:0x7f19bba12d82 [ 31.152435] 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 [ 31.153925] RSP: 002b:00007fff5eba01c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.154566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19bba12d82 [ 31.155167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19bae4c000 [ 31.155850] RBP: 00007f19bae4c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.156445] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646191d7ec0 [ 31.157080] R13: 00007fff5eba01e0 R14: 00007fff5eba0210 R15: 00007fff5eba0570 [ 31.157670] [ 31.157877] [ 31.158026] Allocated by task 211: [ 31.158321] kasan_save_stack+0x22/0x50 [ 31.158676] kasan_set_track+0x25/0x30 [ 31.159020] __kasan_slab_alloc+0x59/0x70 [ 31.159393] kmem_cache_alloc+0x16b/0x370 [ 31.159747] vm_area_dup+0x20/0x160 [ 31.160084] __split_vma+0x170/0x950 [ 31.160411] split_vma+0xc6/0x110 [ 31.160714] mprotect_fixup+0x8d2/0xb30 [ 31.161066] do_mprotect_pkey+0x87e/0xd40 [ 31.161437] __x64_sys_mprotect+0x78/0xc0 [ 31.161806] do_syscall_64+0x3f/0x90 [ 31.162135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162584] [ 31.162739] Freed by task 13: [ 31.163008] kasan_save_stack+0x22/0x50 [ 31.163349] kasan_set_track+0x25/0x30 [ 31.163688] kasan_save_free_info+0x2b/0x50 [ 31.164072] __kasan_slab_free+0x10a/0x190 [ 31.164439] kmem_cache_free+0x10d/0x4d0 [ 31.164802] rcu_core+0x8c8/0x2860 [ 31.165106] __do_softirq+0x1b7/0x7d4 [ 31.165451] [ 31.165612] Last potentially related work creation: [ 31.166049] kasan_save_stack+0x22/0x50 [ 31.166417] __kasan_record_aux_stack+0x8e/0xa0 [ 31.166840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.167307] remove_vma+0x139/0x170 [ 31.167654] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.168111] do_vmi_munmap+0x1f1/0x2b0 [ 31.168463] __vm_munmap+0x138/0x3a0 [ 31.168810] __x64_sys_munmap+0x59/0x80 [ 31.169185] do_syscall_64+0x3f/0x90 [ 31.169539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170014] [ 31.170176] Second to last potentially related work creation: [ 31.170680] kasan_save_stack+0x22/0x50 [ 31.171065] __kasan_record_aux_stack+0x8e/0xa0 [ 31.171496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.172006] remove_vma+0x139/0x170 [ 31.172338] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.172730] do_vmi_munmap+0x1f1/0x2b0 [ 31.173078] mmap_region+0x1f9/0x2660 [ 31.173418] do_mmap+0x854/0xf00 [ 31.173720] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.174080] ksys_mmap_pgoff+0x3af/0x500 [ 31.174440] do_syscall_64+0x3f/0x90 [ 31.174786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.175248] [ 31.175407] The buggy address belongs to the object at ffff88800c543740 [ 31.175407] which belongs to the cache vm_area_struct of size 168 [ 31.176547] The buggy address is located 88 bytes inside of [ 31.176547] freed 168-byte region [ffff88800c543740, ffff88800c5437e8) [ 31.177563] [ 31.177745] The buggy address belongs to the physical page: [ 31.178235] page:00000000a2d2f9b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc543 [ 31.179002] memcg:ffff88800e306b01 [ 31.179311] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.179764] page_type: 0xffffffff() [ 31.180098] raw: 0100000000000200 ffff8880087a0c80 ffffea0000364940 dead000000000002 [ 31.180739] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e306b01 [ 31.181377] page dumped because: kasan: bad access detected [ 31.181840] [ 31.181991] Memory state around the buggy address: [ 31.182399] ffff88800c543680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.182999] ffff88800c543700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.183581] >ffff88800c543780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.184175] ^ [ 31.184505] ffff88800c543800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.185076] ffff88800c543880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.185662] ================================================================== [ 31.186627] Disabling lock debugging due to kernel taint [ 32.721188] BUG: Bad rss-counter state mm:000000008a8bc571 type:MM_FILEPAGES val:33 [ 32.721889] BUG: Bad rss-counter state mm:000000008a8bc571 type:MM_ANONPAGES val:22 [ 33.125227] BUG: Bad rss-counter state mm:00000000b9b12288 type:MM_FILEPAGES val:33 [ 33.126027] BUG: Bad rss-counter state mm:00000000b9b12288 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23614' (ECDSA) to the list of known hosts. 2023/06/21 09:17:17 fuzzer started 2023/06/21 09:17:17 dialing manager at localhost:36067 2023/06/21 09:17:18 checking machine... 2023/06/21 09:17:18 checking revisions... [ 33.726571] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:17:18 testing simple program... [ 33.766254] cgroup: Unknown subsys name 'net' [ 33.814648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:17:17 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888013f1b1b0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff813710b9 RBP=ffff88806ce3a3d8 RSP=ffff8880166d7818 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000002a R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff813710be RFL=00000286 [--S--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 00007f917fa9c700 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=00007ffcc77512f8 CR3=000000000ea16000 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=2037313a37313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a37313a3930203132 XMM08=79732f62696c2f223d6874617020303d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab1b24 RDI=ffff88800db455b4 RBP=0000000000000000 RSP=ffff88801581f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000aeb00000aeb R12=0000000000000000 R13=0000000000000032 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 00007fb2c07b4900 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=00007ffe8b441000 CR3=000000000e8ac000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000