syzkaller login: [ 30.504558] sshd (213) used greatest stack depth: 24128 bytes left [ 30.505995] BUG: Bad rss-counter state mm:000000000ee150bb type:MM_FILEPAGES val:33 [ 30.507681] BUG: Bad rss-counter state mm:000000000ee150bb type:MM_ANONPAGES val:22 [ 30.664347] ================================================================== [ 30.665302] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.666280] Read of size 8 at addr ffff888016a93968 by task sshd/220 [ 30.667085] [ 30.667318] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.668377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.669387] Call Trace: [ 30.669716] [ 30.670028] dump_stack_lvl+0x91/0xf0 [ 30.670541] print_report+0xcc/0x620 [ 30.671042] ? __virt_addr_valid+0x102/0x340 [ 30.671649] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.672301] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.672945] kasan_report+0xbe/0xf0 [ 30.673441] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.674092] vma_interval_tree_remove+0xc75/0xec0 [ 30.674717] vma_prepare+0xc54/0x11a0 [ 30.675230] __split_vma+0x5af/0x950 [ 30.675719] ? __pfx___split_vma+0x10/0x10 [ 30.676268] ? find_held_lock+0x2c/0x110 [ 30.676813] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.677397] ? lock_is_held_type+0x9f/0x120 [ 30.677966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.678601] ? mtree_range_walk+0x632/0x900 [ 30.679178] ? mas_walk+0x5c7/0x7c0 [ 30.679676] do_vmi_munmap+0x1f1/0x2b0 [ 30.680189] mmap_region+0x1f9/0x2660 [ 30.680688] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.681235] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.681988] ? __pfx_lock_acquire+0x10/0x10 [ 30.682535] ? __pfx_mmap_region+0x10/0x10 [ 30.683103] ? security_mmap_addr+0x7d/0xa0 [ 30.683659] ? get_unmapped_area+0x1f5/0x3f0 [ 30.684227] do_mmap+0x854/0xf00 [ 30.684682] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.685193] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.685769] ksys_mmap_pgoff+0x3af/0x500 [ 30.686297] do_syscall_64+0x3f/0x90 [ 30.686800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687499] RIP: 0033:0x7f920604cd82 [ 30.687980] 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 [ 30.690219] RSP: 002b:00007ffef62d5c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.691197] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f920604cd82 [ 30.692089] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9205486000 [ 30.692990] RBP: 00007f9205486000 R08: 0000000000000009 R09: 0000000000001000 [ 30.693877] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564aa978dec0 [ 30.694770] R13: 00007ffef62d5ca0 R14: 00007ffef62d5cd0 R15: 00007ffef62d6030 [ 30.695674] [ 30.695976] [ 30.696201] Allocated by task 213: [ 30.696647] kasan_save_stack+0x22/0x50 [ 30.697175] kasan_set_track+0x25/0x30 [ 30.697695] __kasan_slab_alloc+0x59/0x70 [ 30.698242] kmem_cache_alloc+0x16b/0x370 [ 30.698789] vm_area_dup+0x20/0x160 [ 30.699274] __split_vma+0x170/0x950 [ 30.699754] split_vma+0xc6/0x110 [ 30.700211] mprotect_fixup+0x8d2/0xb30 [ 30.700733] do_mprotect_pkey+0x87e/0xd40 [ 30.701277] __x64_sys_mprotect+0x78/0xc0 [ 30.701815] do_syscall_64+0x3f/0x90 [ 30.702311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.702982] [ 30.703215] Freed by task 213: [ 30.703609] kasan_save_stack+0x22/0x50 [ 30.704112] kasan_set_track+0x25/0x30 [ 30.704603] kasan_save_free_info+0x2b/0x50 [ 30.705131] __kasan_slab_free+0x10a/0x190 [ 30.705663] kmem_cache_free+0x10d/0x4d0 [ 30.706170] rcu_core+0x8c8/0x2860 [ 30.706606] __do_softirq+0x1b7/0x7d4 [ 30.707085] [ 30.707300] Last potentially related work creation: [ 30.707877] kasan_save_stack+0x22/0x50 [ 30.708373] __kasan_record_aux_stack+0x8e/0xa0 [ 30.708943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.709636] remove_vma+0x139/0x170 [ 30.710090] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.710647] do_vmi_munmap+0x1f1/0x2b0 [ 30.711153] __vm_munmap+0x138/0x3a0 [ 30.711618] __x64_sys_munmap+0x59/0x80 [ 30.712109] do_syscall_64+0x3f/0x90 [ 30.712583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.713221] [ 30.713432] The buggy address belongs to the object at ffff888016a93910 [ 30.713432] which belongs to the cache vm_area_struct of size 168 [ 30.714875] The buggy address is located 88 bytes inside of [ 30.714875] freed 168-byte region [ffff888016a93910, ffff888016a939b8) [ 30.716268] [ 30.716480] The buggy address belongs to the physical page: [ 30.717139] page:000000006a715a6d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a93 [ 30.718217] memcg:ffff88800c602001 [ 30.718636] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.719281] page_type: 0xffffffff() [ 30.719724] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.720657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c602001 [ 30.721577] page dumped because: kasan: bad access detected [ 30.722261] [ 30.722478] Memory state around the buggy address: [ 30.723059] ffff888016a93800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.723953] ffff888016a93880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.724823] >ffff888016a93900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.725679] ^ [ 30.726464] ffff888016a93980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.727343] ffff888016a93a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.728200] ================================================================== [ 30.729143] Disabling lock debugging due to kernel taint [ 32.652895] BUG: Bad rss-counter state mm:0000000032ee3587 type:MM_FILEPAGES val:33 [ 32.654191] BUG: Bad rss-counter state mm:0000000032ee3587 type:MM_ANONPAGES val:22 [ 33.112174] BUG: Bad rss-counter state mm:00000000729a7503 type:MM_FILEPAGES val:33 [ 33.113280] BUG: Bad rss-counter state mm:00000000729a7503 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62861' (ECDSA) to the list of known hosts. 2023/06/21 01:53:50 fuzzer started 2023/06/21 01:53:50 dialing manager at localhost:36067 2023/06/21 01:53:50 checking machine... 2023/06/21 01:53:50 checking revisions... [ 33.806174] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:53:50 testing simple program... [ 33.856174] cgroup: Unknown subsys name 'net' [ 33.907726] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:53:50 Registers: info registers vcpu 0 RAX=0000000040000000 RBX=ffff888015bfcd00 RCX=0000000000000000 RDX=ffff888015bfb680 RSI=ffffffff810acf4a RDI=0000000000000005 RBP=ffff888015bfcd10 RSP=ffff88801663f840 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=ffff888015bfcd40 R15=0000000000000001 RIP=ffffffff814c089b RFL=00000046 [---Z-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 00007f59a79c3700 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=00007f4de70ba618 CR3=000000000e63c000 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=2039343a33353a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a33353a3130203132 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007f708c399f00 CR3=000000000d5f6000 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=06623aecc14ed7b44a45dad2750df2c5 XMM02=2c67c8bc2e329bc3000000000011a2f0 XMM03=fb795ef6d657705600000000001214c0 XMM04=8d004f3efd9857bb00000000000ae988 XMM05=19e9129bd510f2350000000000131728 XMM06=5a2990028f3dba440000000000130590 XMM07=e042d86d42eb936e0000000000121740 XMM08=c79e0f230a831487000000000011a350 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000