syzkaller login: [ 31.736495] BUG: Bad rss-counter state mm:0000000079f47ebf type:MM_FILEPAGES val:33 [ 31.737582] BUG: Bad rss-counter state mm:0000000079f47ebf type:MM_ANONPAGES val:22 [ 31.902003] ================================================================== [ 31.902916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.903842] Read of size 8 at addr ffff88800c69a310 by task sshd/219 [ 31.904612] [ 31.904829] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.905805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.906777] Call Trace: [ 31.907091] [ 31.907375] dump_stack_lvl+0x91/0xf0 [ 31.907884] print_report+0xcc/0x620 [ 31.908369] ? __virt_addr_valid+0x102/0x340 [ 31.908908] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.909521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.910131] kasan_report+0xbe/0xf0 [ 31.910609] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.911228] vma_interval_tree_remove+0xc75/0xec0 [ 31.911833] vma_prepare+0xc54/0x11a0 [ 31.912312] __split_vma+0x5af/0x950 [ 31.912788] ? __pfx___split_vma+0x10/0x10 [ 31.913314] ? find_held_lock+0x2c/0x110 [ 31.913826] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.914397] ? lock_is_held_type+0x9f/0x120 [ 31.914934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.915543] ? mtree_range_walk+0x632/0x900 [ 31.916091] ? mas_walk+0x5c7/0x7c0 [ 31.916564] do_vmi_munmap+0x1f1/0x2b0 [ 31.917047] mmap_region+0x1f9/0x2660 [ 31.917524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.918039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.918798] ? __pfx_lock_acquire+0x10/0x10 [ 31.919342] ? __pfx_mmap_region+0x10/0x10 [ 31.919875] ? security_mmap_addr+0x7d/0xa0 [ 31.920424] ? get_unmapped_area+0x1f5/0x3f0 [ 31.920974] do_mmap+0x854/0xf00 [ 31.921420] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.921917] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.922494] ksys_mmap_pgoff+0x3af/0x500 [ 31.923006] do_syscall_64+0x3f/0x90 [ 31.923491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.924147] RIP: 0033:0x7fb69f9e4d82 [ 31.924615] 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 [ 31.926773] RSP: 002b:00007ffffd16c148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.927691] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb69f9e4d82 [ 31.928542] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb69ee1e000 [ 31.929400] RBP: 00007fb69ee1e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.930268] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561461461d90 [ 31.931142] R13: 00007ffffd16c160 R14: 00007ffffd16c190 R15: 00007ffffd16c4f0 [ 31.932001] [ 31.932298] [ 31.932519] Allocated by task 212: [ 31.932944] kasan_save_stack+0x22/0x50 [ 31.933456] kasan_set_track+0x25/0x30 [ 31.933953] __kasan_slab_alloc+0x59/0x70 [ 31.934487] kmem_cache_alloc+0x16b/0x370 [ 31.935005] vm_area_dup+0x20/0x160 [ 31.935470] __split_vma+0x170/0x950 [ 31.935942] split_vma+0xc6/0x110 [ 31.936388] mprotect_fixup+0x8d2/0xb30 [ 31.936889] do_mprotect_pkey+0x87e/0xd40 [ 31.937407] __x64_sys_mprotect+0x78/0xc0 [ 31.937932] do_syscall_64+0x3f/0x90 [ 31.938424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.939069] [ 31.939287] Freed by task 212: [ 31.939677] kasan_save_stack+0x22/0x50 [ 31.940190] kasan_set_track+0x25/0x30 [ 31.940686] kasan_save_free_info+0x2b/0x50 [ 31.941229] __kasan_slab_free+0x10a/0x190 [ 31.941769] kmem_cache_free+0x10d/0x4d0 [ 31.942281] rcu_core+0x8c8/0x2860 [ 31.942756] __do_softirq+0x1b7/0x7d4 [ 31.943247] [ 31.943466] Last potentially related work creation: [ 31.944056] kasan_save_stack+0x22/0x50 [ 31.944562] __kasan_record_aux_stack+0x8e/0xa0 [ 31.945138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.945779] remove_vma+0x139/0x170 [ 31.946238] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.946815] do_vmi_munmap+0x1f1/0x2b0 [ 31.947306] __vm_munmap+0x138/0x3a0 [ 31.947777] __x64_sys_munmap+0x59/0x80 [ 31.948286] do_syscall_64+0x3f/0x90 [ 31.948765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.949424] [ 31.949642] Second to last potentially related work creation: [ 31.950329] kasan_save_stack+0x22/0x50 [ 31.950829] __kasan_record_aux_stack+0x8e/0xa0 [ 31.951411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.952055] remove_vma+0x139/0x170 [ 31.952508] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.953065] do_vmi_munmap+0x1f1/0x2b0 [ 31.953561] mmap_region+0x1f9/0x2660 [ 31.954038] do_mmap+0x854/0xf00 [ 31.954490] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.954990] ksys_mmap_pgoff+0x3af/0x500 [ 31.955505] do_syscall_64+0x3f/0x90 [ 31.955985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.956632] [ 31.956848] The buggy address belongs to the object at ffff88800c69a2b8 [ 31.956848] which belongs to the cache vm_area_struct of size 168 [ 31.958321] The buggy address is located 88 bytes inside of [ 31.958321] freed 168-byte region [ffff88800c69a2b8, ffff88800c69a360) [ 31.959737] [ 31.959958] The buggy address belongs to the physical page: [ 31.960621] page:00000000a3bc908e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc69a [ 31.961719] memcg:ffff88800965ea01 [ 31.962153] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.962817] page_type: 0xffffffff() [ 31.963272] raw: 0100000000000200 ffff8880087a0c80 ffffea000038f540 dead000000000008 [ 31.964198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800965ea01 [ 31.965105] page dumped because: kasan: bad access detected [ 31.965778] [ 31.965995] Memory state around the buggy address: [ 31.966586] ffff88800c69a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.967452] ffff88800c69a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.968307] >ffff88800c69a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.969171] ^ [ 31.969637] ffff88800c69a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.970527] ffff88800c69a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.971385] ================================================================== [ 31.972353] Disabling lock debugging due to kernel taint [ 34.126156] BUG: Bad rss-counter state mm:00000000ffd442a6 type:MM_FILEPAGES val:33 [ 34.127702] BUG: Bad rss-counter state mm:00000000ffd442a6 type:MM_ANONPAGES val:22 [ 34.645949] BUG: Bad rss-counter state mm:0000000066f51db5 type:MM_FILEPAGES val:33 [ 34.647225] BUG: Bad rss-counter state mm:0000000066f51db5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49487' (ECDSA) to the list of known hosts. 2023/06/20 17:46:49 fuzzer started 2023/06/20 17:46:49 dialing manager at localhost:36067 2023/06/20 17:46:49 checking machine... 2023/06/20 17:46:49 checking revisions... [ 35.265166] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:46:49 testing simple program... [ 35.318817] cgroup: Unknown subsys name 'net' [ 35.371866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:46:49 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=00007f683e717c00 CR3=000000000986e000 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=2039343a36343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a36343a3731203032 XMM08=6c646d632022656369767265732e4079 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8613897b RBX=0000000000000002 RCX=ffffffff86138976 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8613897a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130ab5 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 00007fd3c3260900 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=00007ffd8e161000 CR3=00000000187b2000 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