syzkaller login: [ 31.053955] BUG: Bad rss-counter state mm:00000000e301299a type:MM_FILEPAGES val:33 [ 31.055170] BUG: Bad rss-counter state mm:00000000e301299a type:MM_ANONPAGES val:22 [ 31.200953] ================================================================== [ 31.201849] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.202774] Read of size 8 at addr ffff88800cdf5140 by task sshd/221 [ 31.203598] [ 31.203816] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.204697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.205683] Call Trace: [ 31.206004] [ 31.206292] dump_stack_lvl+0x91/0xf0 [ 31.206788] print_report+0xcc/0x620 [ 31.207272] ? __virt_addr_valid+0x102/0x340 [ 31.207820] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209083] kasan_report+0xbe/0xf0 [ 31.209563] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210185] vma_interval_tree_remove+0xc75/0xec0 [ 31.210787] vma_prepare+0xc54/0x11a0 [ 31.211267] __split_vma+0x5af/0x950 [ 31.211743] ? __pfx___split_vma+0x10/0x10 [ 31.212280] ? find_held_lock+0x2c/0x110 [ 31.212804] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.213368] ? lock_is_held_type+0x9f/0x120 [ 31.213905] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.214511] ? mtree_range_walk+0x632/0x900 [ 31.215065] ? mas_walk+0x5c7/0x7c0 [ 31.215541] do_vmi_munmap+0x1f1/0x2b0 [ 31.216031] mmap_region+0x1f9/0x2660 [ 31.216520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.217030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.217744] ? __pfx_lock_acquire+0x10/0x10 [ 31.218281] ? __pfx_mmap_region+0x10/0x10 [ 31.218814] ? security_mmap_addr+0x7d/0xa0 [ 31.219348] ? get_unmapped_area+0x1f5/0x3f0 [ 31.219899] do_mmap+0x854/0xf00 [ 31.220355] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.220851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.221416] ksys_mmap_pgoff+0x3af/0x500 [ 31.221923] do_syscall_64+0x3f/0x90 [ 31.222399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223044] RIP: 0033:0x7f7716a2cd82 [ 31.223501] 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 [ 31.225641] RSP: 002b:00007fff86439ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.226549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7716a2cd82 [ 31.227392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7715e66000 [ 31.228256] RBP: 00007f7715e66000 R08: 0000000000000009 R09: 0000000000001000 [ 31.229112] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565304df1d90 [ 31.229963] R13: 00007fff86439d00 R14: 00007fff86439d30 R15: 00007fff8643a090 [ 31.230832] [ 31.231130] [ 31.231345] Allocated by task 214: [ 31.231780] kasan_save_stack+0x22/0x50 [ 31.232315] kasan_set_track+0x25/0x30 [ 31.232819] __kasan_slab_alloc+0x59/0x70 [ 31.233345] kmem_cache_alloc+0x16b/0x370 [ 31.233874] vm_area_dup+0x20/0x160 [ 31.234339] __split_vma+0x170/0x950 [ 31.234808] split_vma+0xc6/0x110 [ 31.235259] mprotect_fixup+0x8d2/0xb30 [ 31.235761] do_mprotect_pkey+0x87e/0xd40 [ 31.236292] __x64_sys_mprotect+0x78/0xc0 [ 31.236812] do_syscall_64+0x3f/0x90 [ 31.237315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237994] [ 31.238229] Freed by task 214: [ 31.238649] kasan_save_stack+0x22/0x50 [ 31.239183] kasan_set_track+0x25/0x30 [ 31.239705] kasan_save_free_info+0x2b/0x50 [ 31.240277] __kasan_slab_free+0x10a/0x190 [ 31.240841] kmem_cache_free+0x10d/0x4d0 [ 31.241376] rcu_core+0x8c8/0x2860 [ 31.241840] __do_softirq+0x1b7/0x7d4 [ 31.242342] [ 31.242566] Last potentially related work creation: [ 31.243184] kasan_save_stack+0x22/0x50 [ 31.243710] __kasan_record_aux_stack+0x8e/0xa0 [ 31.244328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.245012] remove_vma+0x139/0x170 [ 31.245483] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.246074] do_vmi_munmap+0x1f1/0x2b0 [ 31.246576] __vm_munmap+0x138/0x3a0 [ 31.247071] __x64_sys_munmap+0x59/0x80 [ 31.247588] do_syscall_64+0x3f/0x90 [ 31.248089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248796] [ 31.249023] The buggy address belongs to the object at ffff88800cdf50e8 [ 31.249023] which belongs to the cache vm_area_struct of size 168 [ 31.250582] The buggy address is located 88 bytes inside of [ 31.250582] freed 168-byte region [ffff88800cdf50e8, ffff88800cdf5190) [ 31.252070] [ 31.252305] The buggy address belongs to the physical page: [ 31.253001] page:000000008f80fcbb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcdf5 [ 31.254152] memcg:ffff888018e1e601 [ 31.254600] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.255282] page_type: 0xffffffff() [ 31.255752] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.256734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e1e601 [ 31.257690] page dumped because: kasan: bad access detected [ 31.258390] [ 31.258620] Memory state around the buggy address: [ 31.259232] ffff88800cdf5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.260154] ffff88800cdf5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.261068] >ffff88800cdf5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.261975] ^ [ 31.262656] ffff88800cdf5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.263569] ffff88800cdf5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.264482] ================================================================== [ 31.265501] Disabling lock debugging due to kernel taint [ 34.158586] BUG: Bad rss-counter state mm:00000000cf5187a5 type:MM_FILEPAGES val:33 [ 34.159898] BUG: Bad rss-counter state mm:00000000cf5187a5 type:MM_ANONPAGES val:22 [ 34.632334] BUG: Bad rss-counter state mm:0000000006add001 type:MM_FILEPAGES val:33 [ 34.633558] BUG: Bad rss-counter state mm:0000000006add001 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49760' (ECDSA) to the list of known hosts. 2023/06/20 15:51:29 fuzzer started 2023/06/20 15:51:29 dialing manager at localhost:36067 2023/06/20 15:51:29 checking machine... 2023/06/20 15:51:29 checking revisions... [ 35.348030] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:51:30 testing simple program... [ 35.405157] cgroup: Unknown subsys name 'net' [ 35.460358] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:51:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016f6f960 RCX=0000000000000003 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888016f6f918 RBP=ffff888016259b40 RSP=ffff888016f6f870 R8 =0000000000000006 R9 =0000000000000000 R10=ffff888016f6f8c8 R11=ffffffff81806f71 R12=0000000000000000 R13=ffff888016f6f8f0 R14=ffff888016259b40 R15=ffff888016f6f8c8 RIP=ffffffff84513442 RFL=00000206 [-----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 00007fedb242a900 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=00007fedb29df650 CR3=0000000016a42000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fff74c4ff08 CR3=0000000019622000 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=2039323a31353a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a31353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000