syzkaller login: [ 38.623066] BUG: Bad rss-counter state mm:0000000013b925d1 type:MM_FILEPAGES val:33 [ 38.624545] BUG: Bad rss-counter state mm:0000000013b925d1 type:MM_ANONPAGES val:22 [ 38.780286] ================================================================== [ 38.781204] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.782142] Read of size 8 at addr ffff88800edd93f8 by task sshd/218 [ 38.782896] [ 38.783123] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.784092] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.785083] Call Trace: [ 38.785400] [ 38.785690] dump_stack_lvl+0x91/0xf0 [ 38.786178] print_report+0xcc/0x620 [ 38.786671] ? __virt_addr_valid+0x102/0x340 [ 38.787244] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.787860] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.788484] kasan_report+0xbe/0xf0 [ 38.788962] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.789599] vma_interval_tree_remove+0xc75/0xec0 [ 38.790194] vma_prepare+0xc54/0x11a0 [ 38.790673] __split_vma+0x5af/0x950 [ 38.791156] ? __pfx___split_vma+0x10/0x10 [ 38.791692] ? find_held_lock+0x2c/0x110 [ 38.792215] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.792789] ? lock_is_held_type+0x9f/0x120 [ 38.793323] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.793928] ? mtree_range_walk+0x632/0x900 [ 38.794479] ? mas_walk+0x5c7/0x7c0 [ 38.794957] do_vmi_munmap+0x1f1/0x2b0 [ 38.795456] mmap_region+0x1f9/0x2660 [ 38.795936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.796450] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.797157] ? __pfx_lock_acquire+0x10/0x10 [ 38.797689] ? __pfx_mmap_region+0x10/0x10 [ 38.798239] ? security_mmap_addr+0x7d/0xa0 [ 38.798773] ? get_unmapped_area+0x1f5/0x3f0 [ 38.799337] do_mmap+0x854/0xf00 [ 38.799768] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.800258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.800810] ksys_mmap_pgoff+0x3af/0x500 [ 38.801312] do_syscall_64+0x3f/0x90 [ 38.801786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.802428] RIP: 0033:0x7f7085d57d82 [ 38.802881] 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 [ 38.804976] RSP: 002b:00007fff2d622368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.805867] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7085d57d82 [ 38.806714] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7085191000 [ 38.807567] RBP: 00007f7085191000 R08: 0000000000000009 R09: 0000000000001000 [ 38.808397] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b38697bec0 [ 38.809233] R13: 00007fff2d622380 R14: 00007fff2d6223b0 R15: 00007fff2d622710 [ 38.810084] [ 38.810372] [ 38.810585] Allocated by task 211: [ 38.811007] kasan_save_stack+0x22/0x50 [ 38.811522] kasan_set_track+0x25/0x30 [ 38.812012] __kasan_slab_alloc+0x59/0x70 [ 38.812526] kmem_cache_alloc+0x16b/0x370 [ 38.813040] vm_area_dup+0x20/0x160 [ 38.813491] __split_vma+0x170/0x950 [ 38.813956] split_vma+0xc6/0x110 [ 38.814391] mprotect_fixup+0x8d2/0xb30 [ 38.814892] do_mprotect_pkey+0x87e/0xd40 [ 38.815427] __x64_sys_mprotect+0x78/0xc0 [ 38.815944] do_syscall_64+0x3f/0x90 [ 38.816418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.817061] [ 38.817277] Freed by task 211: [ 38.817663] kasan_save_stack+0x22/0x50 [ 38.818164] kasan_set_track+0x25/0x30 [ 38.818656] kasan_save_free_info+0x2b/0x50 [ 38.819190] __kasan_slab_free+0x10a/0x190 [ 38.819720] kmem_cache_free+0x10d/0x4d0 [ 38.820226] rcu_core+0x8c8/0x2860 [ 38.820665] __do_softirq+0x1b7/0x7d4 [ 38.821140] [ 38.821352] Last potentially related work creation: [ 38.821929] kasan_save_stack+0x22/0x50 [ 38.822430] __kasan_record_aux_stack+0x8e/0xa0 [ 38.823004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.823668] remove_vma+0x139/0x170 [ 38.824120] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.824678] do_vmi_munmap+0x1f1/0x2b0 [ 38.825227] __vm_munmap+0x138/0x3a0 [ 38.825688] __x64_sys_munmap+0x59/0x80 [ 38.826174] do_syscall_64+0x3f/0x90 [ 38.826645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.827288] [ 38.827500] The buggy address belongs to the object at ffff88800edd93a0 [ 38.827500] which belongs to the cache vm_area_struct of size 168 [ 38.828944] The buggy address is located 88 bytes inside of [ 38.828944] freed 168-byte region [ffff88800edd93a0, ffff88800edd9448) [ 38.830343] [ 38.830556] The buggy address belongs to the physical page: [ 38.831216] page:000000003f73a117 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedd9 [ 38.832283] memcg:ffff88800e728c01 [ 38.832702] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.833341] page_type: 0xffffffff() [ 38.833787] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.834702] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e728c01 [ 38.835609] page dumped because: kasan: bad access detected [ 38.836260] [ 38.836472] Memory state around the buggy address: [ 38.837051] ffff88800edd9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.837893] ffff88800edd9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.838729] >ffff88800edd9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.839623] ^ [ 38.840467] ffff88800edd9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.841325] ffff88800edd9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.842177] ================================================================== [ 38.843307] Disabling lock debugging due to kernel taint [ 41.430177] BUG: Bad rss-counter state mm:0000000068e496db type:MM_FILEPAGES val:33 [ 41.431706] BUG: Bad rss-counter state mm:0000000068e496db type:MM_ANONPAGES val:22 [ 41.953653] BUG: Bad rss-counter state mm:000000007a2ca028 type:MM_FILEPAGES val:33 [ 41.954942] BUG: Bad rss-counter state mm:000000007a2ca028 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17866' (ECDSA) to the list of known hosts. 2023/06/21 08:51:45 fuzzer started 2023/06/21 08:51:45 dialing manager at localhost:36067 2023/06/21 08:51:45 checking machine... 2023/06/21 08:51:45 checking revisions... [ 42.594717] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:51:45 testing simple program... [ 42.641861] cgroup: Unknown subsys name 'net' [ 42.707363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:51:44 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888019ddfa30 RSI=ffff888019ddf9f8 RDI=ffff88806ce09a68 RBP=ffff88806ce09b00 RSP=ffff88806ce09a60 R8 =0000000000000001 R9 =ffff88806ce09aa8 R10=0000000000038001 R11=000000000008b8ed R12=ffff88806ce09b30 R13=0000000000000000 R14=ffff888016db8000 R15=ffff88800db7f500 RIP=ffffffff81130340 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 00007f73c7683900 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=00007f73c7c38650 CR3=000000000c452000 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=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=00007ffe0f5c4c18 CR3=000000000f758000 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=2034343a31353a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a31353a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000