syzkaller login: [ 31.738443] BUG: Bad rss-counter state mm:000000003e9d3486 type:MM_FILEPAGES val:33 [ 31.739791] BUG: Bad rss-counter state mm:000000003e9d3486 type:MM_ANONPAGES val:22 [ 31.778662] ================================================================== [ 31.779670] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.780622] Read of size 8 at addr ffff88801957dc20 by task sshd/220 [ 31.781386] [ 31.781625] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.782503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.783474] Call Trace: [ 31.783792] [ 31.784077] dump_stack_lvl+0x91/0xf0 [ 31.784569] print_report+0xcc/0x620 [ 31.785056] ? __virt_addr_valid+0x102/0x340 [ 31.785625] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.786253] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.786873] kasan_report+0xbe/0xf0 [ 31.787353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.787980] vma_interval_tree_remove+0xc75/0xec0 [ 31.788601] vma_prepare+0xc54/0x11a0 [ 31.789096] __split_vma+0x5af/0x950 [ 31.789602] ? __pfx___split_vma+0x10/0x10 [ 31.790140] ? find_held_lock+0x2c/0x110 [ 31.790673] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.791251] ? lock_is_held_type+0x9f/0x120 [ 31.791803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.792423] ? mtree_range_walk+0x632/0x900 [ 31.792987] ? mas_walk+0x5c7/0x7c0 [ 31.793469] do_vmi_munmap+0x1f1/0x2b0 [ 31.793983] mmap_region+0x1f9/0x2660 [ 31.794477] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.795007] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.795734] ? __pfx_lock_acquire+0x10/0x10 [ 31.796289] ? __pfx_mmap_region+0x10/0x10 [ 31.796834] ? security_mmap_addr+0x7d/0xa0 [ 31.797382] ? get_unmapped_area+0x1f5/0x3f0 [ 31.797963] do_mmap+0x854/0xf00 [ 31.798418] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.798926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.799497] ksys_mmap_pgoff+0x3af/0x500 [ 31.800015] do_syscall_64+0x3f/0x90 [ 31.800501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.801162] RIP: 0033:0x7f0b761e0d82 [ 31.801639] 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 [ 31.803819] RSP: 002b:00007fff1b8a2e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.804759] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b761e0d82 [ 31.805639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b7561a000 [ 31.806675] RBP: 00007f0b7561a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.807545] R10: 0000000000000812 R11: 0000000000000206 R12: 000056500e660f70 [ 31.808410] R13: 00007fff1b8a2e30 R14: 00007fff1b8a2e60 R15: 00007fff1b8a31c0 [ 31.809305] [ 31.809615] [ 31.809835] Allocated by task 213: [ 31.810277] kasan_save_stack+0x22/0x50 [ 31.810796] kasan_set_track+0x25/0x30 [ 31.811308] __kasan_slab_alloc+0x59/0x70 [ 31.811846] kmem_cache_alloc+0x16b/0x370 [ 31.812377] vm_area_dup+0x20/0x160 [ 31.812842] __split_vma+0x170/0x950 [ 31.813318] split_vma+0xc6/0x110 [ 31.813782] mprotect_fixup+0x8d2/0xb30 [ 31.814301] do_mprotect_pkey+0x87e/0xd40 [ 31.814838] __x64_sys_mprotect+0x78/0xc0 [ 31.815374] do_syscall_64+0x3f/0x90 [ 31.815861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.816519] [ 31.816735] Freed by task 213: [ 31.817134] kasan_save_stack+0x22/0x50 [ 31.817663] kasan_set_track+0x25/0x30 [ 31.818178] kasan_save_free_info+0x2b/0x50 [ 31.818719] __kasan_slab_free+0x10a/0x190 [ 31.819266] kmem_cache_free+0x10d/0x4d0 [ 31.819782] rcu_core+0x8c8/0x2860 [ 31.820245] __do_softirq+0x1b7/0x7d4 [ 31.820731] [ 31.820947] Last potentially related work creation: [ 31.821556] kasan_save_stack+0x22/0x50 [ 31.822077] __kasan_record_aux_stack+0x8e/0xa0 [ 31.822660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.823325] remove_vma+0x139/0x170 [ 31.823793] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.824405] do_vmi_munmap+0x1f1/0x2b0 [ 31.824905] __vm_munmap+0x138/0x3a0 [ 31.825391] __x64_sys_munmap+0x59/0x80 [ 31.825897] do_syscall_64+0x3f/0x90 [ 31.826386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.827041] [ 31.827263] The buggy address belongs to the object at ffff88801957dbc8 [ 31.827263] which belongs to the cache vm_area_struct of size 168 [ 31.828754] The buggy address is located 88 bytes inside of [ 31.828754] freed 168-byte region [ffff88801957dbc8, ffff88801957dc70) [ 31.830204] [ 31.830421] The buggy address belongs to the physical page: [ 31.831085] page:00000000b551a85d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1957d [ 31.832210] memcg:ffff888009976201 [ 31.832643] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.833301] page_type: 0xffffffff() [ 31.833771] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.834703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009976201 [ 31.835627] page dumped because: kasan: bad access detected [ 31.836311] [ 31.836532] Memory state around the buggy address: [ 31.837121] ffff88801957db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.838003] ffff88801957db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.838881] >ffff88801957dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.839752] ^ [ 31.840300] ffff88801957dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.841183] ffff88801957dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.842071] ================================================================== [ 31.843313] Disabling lock debugging due to kernel taint [ 34.053730] BUG: Bad rss-counter state mm:00000000698b8a2a type:MM_FILEPAGES val:33 [ 34.054475] BUG: Bad rss-counter state mm:00000000698b8a2a type:MM_ANONPAGES val:22 [ 34.558557] BUG: Bad rss-counter state mm:00000000ff8a93ce type:MM_FILEPAGES val:33 [ 34.560165] BUG: Bad rss-counter state mm:00000000ff8a93ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46733' (ECDSA) to the list of known hosts. 2023/06/19 10:53:52 fuzzer started 2023/06/19 10:53:52 dialing manager at localhost:44161 2023/06/19 10:53:52 checking machine... 2023/06/19 10:53:52 checking revisions... [ 35.217532] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:53:52 testing simple program... [ 35.266431] cgroup: Unknown subsys name 'net' [ 35.301890] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:53:50 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8450d49f RDX=dffffc0000000000 RSI=ffffffff8450d49f RDI=ffffffff85407df0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bb032 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130733 RFL=00000287 [--S--PC] 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=00007ffe141d16d8 CR3=0000000005482000 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=00007f9538e975100000556f4dba3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea0000722d80 RCX=0000000000000100 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806cf09db0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffffffff81845c80 R13=ffffea00003b0a00 R14=ffffffff813782a8 R15=ffff88800ec28da8 RIP=ffffffff8180c49b 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 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=00007f80404d5f70 CR3=000000000c6b2000 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=2031353a33353a3031203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000