syzkaller login: [ 30.838850] BUG: Bad rss-counter state mm:00000000ff7c1192 type:MM_FILEPAGES val:33 [ 30.840114] BUG: Bad rss-counter state mm:00000000ff7c1192 type:MM_ANONPAGES val:22 [ 30.879881] ================================================================== [ 30.880940] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.881923] Read of size 8 at addr ffff88800e098df0 by task sshd/220 [ 30.882869] [ 30.883273] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.884242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.885433] Call Trace: [ 30.885856] <TASK> [ 30.886299] dump_stack_lvl+0x91/0xf0 [ 30.886955] print_report+0xcc/0x620 [ 30.887671] ? __virt_addr_valid+0x102/0x340 [ 30.888547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889505] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.890356] kasan_report+0xbe/0xf0 [ 30.890976] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.891794] vma_interval_tree_remove+0xc75/0xec0 [ 30.892589] vma_prepare+0xc54/0x11a0 [ 30.893228] __split_vma+0x5af/0x950 [ 30.893864] ? __pfx___split_vma+0x10/0x10 [ 30.894570] ? find_held_lock+0x2c/0x110 [ 30.895261] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.895999] ? lock_is_held_type+0x9f/0x120 [ 30.896720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.897518] ? mtree_range_walk+0x632/0x900 [ 30.898281] ? mas_walk+0x5c7/0x7c0 [ 30.898884] do_vmi_munmap+0x1f1/0x2b0 [ 30.899528] mmap_region+0x1f9/0x2660 [ 30.900147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.900805] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.901750] ? __pfx_lock_acquire+0x10/0x10 [ 30.902442] ? __pfx_mmap_region+0x10/0x10 [ 30.903126] ? security_mmap_addr+0x7d/0xa0 [ 30.903803] ? get_unmapped_area+0x1f5/0x3f0 [ 30.904469] do_mmap+0x854/0xf00 [ 30.905004] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.905635] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.906377] ksys_mmap_pgoff+0x3af/0x500 [ 30.907000] do_syscall_64+0x3f/0x90 [ 30.907598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.908406] RIP: 0033:0x7fc611430d82 [ 30.908980] 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 [ 30.911630] RSP: 002b:00007ffeed8d8018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.912763] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc611430d82 [ 30.913750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc61086a000 [ 30.914638] RBP: 00007fc61086a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.915505] R10: 0000000000000812 R11: 0000000000000206 R12: 000056542040dec0 [ 30.916364] R13: 00007ffeed8d8030 R14: 00007ffeed8d8060 R15: 00007ffeed8d83c0 [ 30.917239] </TASK> [ 30.917560] [ 30.917803] Allocated by task 213: [ 30.918246] kasan_save_stack+0x22/0x50 [ 30.918772] kasan_set_track+0x25/0x30 [ 30.919273] __kasan_slab_alloc+0x59/0x70 [ 30.919823] kmem_cache_alloc+0x16b/0x370 [ 30.920382] vm_area_dup+0x20/0x160 [ 30.920854] __split_vma+0x170/0x950 [ 30.921344] split_vma+0xc6/0x110 [ 30.921834] mprotect_fixup+0x8d2/0xb30 [ 30.922348] do_mprotect_pkey+0x87e/0xd40 [ 30.922903] __x64_sys_mprotect+0x78/0xc0 [ 30.923445] do_syscall_64+0x3f/0x90 [ 30.923925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.924679] [ 30.924902] Freed by task 213: [ 30.925289] kasan_save_stack+0x22/0x50 [ 30.925851] kasan_set_track+0x25/0x30 [ 30.926356] kasan_save_free_info+0x2b/0x50 [ 30.927043] __kasan_slab_free+0x10a/0x190 [ 30.927657] kmem_cache_free+0x10d/0x4d0 [ 30.928179] rcu_core+0x8c8/0x2860 [ 30.928657] __do_softirq+0x1b7/0x7d4 [ 30.929171] [ 30.929398] Last potentially related work creation: [ 30.930025] kasan_save_stack+0x22/0x50 [ 30.930551] __kasan_record_aux_stack+0x8e/0xa0 [ 30.931130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.931781] remove_vma+0x139/0x170 [ 30.932241] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.932799] do_vmi_munmap+0x1f1/0x2b0 [ 30.933291] __vm_munmap+0x138/0x3a0 [ 30.933804] __x64_sys_munmap+0x59/0x80 [ 30.934312] do_syscall_64+0x3f/0x90 [ 30.934805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.935482] [ 30.935699] Second to last potentially related work creation: [ 30.936391] kasan_save_stack+0x22/0x50 [ 30.936906] __kasan_record_aux_stack+0x8e/0xa0 [ 30.937507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.938180] remove_vma+0x139/0x170 [ 30.938656] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.939257] do_vmi_munmap+0x1f1/0x2b0 [ 30.939777] mmap_region+0x1f9/0x2660 [ 30.940276] do_mmap+0x854/0xf00 [ 30.940729] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.941226] ksys_mmap_pgoff+0x3af/0x500 [ 30.941772] do_syscall_64+0x3f/0x90 [ 30.942259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942933] [ 30.943155] The buggy address belongs to the object at ffff88800e098d98 [ 30.943155] which belongs to the cache vm_area_struct of size 168 [ 30.944694] The buggy address is located 88 bytes inside of [ 30.944694] freed 168-byte region [ffff88800e098d98, ffff88800e098e40) [ 30.946167] [ 30.946394] The buggy address belongs to the physical page: [ 30.947053] page:00000000e6b372dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe098 [ 30.948152] memcg:ffff888016837401 [ 30.948598] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.949255] page_type: 0xffffffff() [ 30.949755] raw: 0100000000000200 ffff8880087a0c80 ffffea0000319140 dead000000000008 [ 30.950703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016837401 [ 30.951624] page dumped because: kasan: bad access detected [ 30.952291] [ 30.952522] Memory state around the buggy address: [ 30.953105] ffff88800e098c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.954020] ffff88800e098d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.954903] >ffff88800e098d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.955784] ^ [ 30.956620] ffff88800e098e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.957512] ffff88800e098e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.958400] ================================================================== [ 30.959340] Disabling lock debugging due to kernel taint [ 33.258728] BUG: Bad rss-counter state mm:00000000c01c5799 type:MM_FILEPAGES val:33 [ 33.259924] BUG: Bad rss-counter state mm:00000000c01c5799 type:MM_ANONPAGES val:22 [ 33.733198] BUG: Bad rss-counter state mm:000000007c1ea305 type:MM_FILEPAGES val:33 [ 33.734291] BUG: Bad rss-counter state mm:000000007c1ea305 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1820' (ECDSA) to the list of known hosts. 2023/06/20 15:24:27 fuzzer started 2023/06/20 15:24:27 dialing manager at localhost:36067 2023/06/20 15:24:27 checking machine... 2023/06/20 15:24:27 checking revisions... [ 34.439207] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:24:27 testing simple program... [ 34.481392] cgroup: Unknown subsys name 'net' [ 34.523935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:24:27 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801778ff01 RSI=ffff88801778ff50 RDI=ffff88801778ff50 RBP=ffff88801778f600 RSP=ffff88801778f538 R8 =ffffffff864b2030 R9 =ffff88801778f5e8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88801778f608 R13=ffff88801778f5f0 R14=ffff88801778ff58 R15=ffff88801778f5a8 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007fba167ec700 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=00007ff395aa3860 CR3=000000000eb36000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38363336332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383633 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007ffe8a219d28 CR3=0000000005482000 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=00007fdb197ea510000055f8caab2790 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