syzkaller login: [ 31.520644] BUG: Bad rss-counter state mm:000000006c474175 type:MM_FILEPAGES val:33 [ 31.521867] BUG: Bad rss-counter state mm:000000006c474175 type:MM_ANONPAGES val:22 [ 31.684020] ================================================================== [ 31.684952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.685890] Read of size 8 at addr ffff88800e78f6b0 by task sshd/219 [ 31.686780] [ 31.686997] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.687858] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.688873] Call Trace: [ 31.689192] [ 31.689478] dump_stack_lvl+0x91/0xf0 [ 31.689968] print_report+0xcc/0x620 [ 31.690449] ? __virt_addr_valid+0x102/0x340 [ 31.690997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.691619] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.692241] kasan_report+0xbe/0xf0 [ 31.692724] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.693343] vma_interval_tree_remove+0xc75/0xec0 [ 31.693944] vma_prepare+0xc54/0x11a0 [ 31.694422] __split_vma+0x5af/0x950 [ 31.694891] ? __pfx___split_vma+0x10/0x10 [ 31.695421] ? find_held_lock+0x2c/0x110 [ 31.695941] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.696504] ? lock_is_held_type+0x9f/0x120 [ 31.697057] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.697660] ? mtree_range_walk+0x632/0x900 [ 31.698209] ? mas_walk+0x5c7/0x7c0 [ 31.698687] do_vmi_munmap+0x1f1/0x2b0 [ 31.699183] mmap_region+0x1f9/0x2660 [ 31.699665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.700178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.700907] ? __pfx_lock_acquire+0x10/0x10 [ 31.701436] ? __pfx_mmap_region+0x10/0x10 [ 31.701969] ? security_mmap_addr+0x7d/0xa0 [ 31.702500] ? get_unmapped_area+0x1f5/0x3f0 [ 31.703050] do_mmap+0x854/0xf00 [ 31.703493] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.703991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.704551] ksys_mmap_pgoff+0x3af/0x500 [ 31.705071] do_syscall_64+0x3f/0x90 [ 31.705550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.706195] RIP: 0033:0x7facebc8bd82 [ 31.706650] 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 [ 31.708853] RSP: 002b:00007ffe5e490308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.709766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facebc8bd82 [ 31.710616] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faceb0c5000 [ 31.711469] RBP: 00007faceb0c5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.712320] R10: 0000000000000812 R11: 0000000000000206 R12: 000055963daf2ec0 [ 31.713176] R13: 00007ffe5e490320 R14: 00007ffe5e490350 R15: 00007ffe5e4906b0 [ 31.714032] [ 31.714324] [ 31.714538] Allocated by task 212: [ 31.714969] kasan_save_stack+0x22/0x50 [ 31.715478] kasan_set_track+0x25/0x30 [ 31.715976] __kasan_slab_alloc+0x59/0x70 [ 31.716507] kmem_cache_alloc+0x16b/0x370 [ 31.717028] vm_area_dup+0x20/0x160 [ 31.717482] __split_vma+0x170/0x950 [ 31.717950] split_vma+0xc6/0x110 [ 31.718392] mprotect_fixup+0x8d2/0xb30 [ 31.718888] do_mprotect_pkey+0x87e/0xd40 [ 31.719411] __x64_sys_mprotect+0x78/0xc0 [ 31.719934] do_syscall_64+0x3f/0x90 [ 31.720403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.721059] [ 31.721273] Freed by task 212: [ 31.721667] kasan_save_stack+0x22/0x50 [ 31.722170] kasan_set_track+0x25/0x30 [ 31.722662] kasan_save_free_info+0x2b/0x50 [ 31.723199] __kasan_slab_free+0x10a/0x190 [ 31.723739] kmem_cache_free+0x10d/0x4d0 [ 31.724251] rcu_core+0x8c8/0x2860 [ 31.724705] __do_softirq+0x1b7/0x7d4 [ 31.725183] [ 31.725403] Last potentially related work creation: [ 31.725993] kasan_save_stack+0x22/0x50 [ 31.726501] __kasan_record_aux_stack+0x8e/0xa0 [ 31.727081] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.727727] remove_vma+0x139/0x170 [ 31.728176] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.728743] do_vmi_munmap+0x1f1/0x2b0 [ 31.729226] __vm_munmap+0x138/0x3a0 [ 31.729693] __x64_sys_munmap+0x59/0x80 [ 31.730192] do_syscall_64+0x3f/0x90 [ 31.730663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.731304] [ 31.731527] Second to last potentially related work creation: [ 31.732211] kasan_save_stack+0x22/0x50 [ 31.732724] __kasan_record_aux_stack+0x8e/0xa0 [ 31.733300] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.733941] remove_vma+0x139/0x170 [ 31.734399] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.734956] do_vmi_munmap+0x1f1/0x2b0 [ 31.735440] mmap_region+0x1f9/0x2660 [ 31.735920] do_mmap+0x854/0xf00 [ 31.736352] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.736842] ksys_mmap_pgoff+0x3af/0x500 [ 31.737342] do_syscall_64+0x3f/0x90 [ 31.737813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.738458] [ 31.738676] The buggy address belongs to the object at ffff88800e78f658 [ 31.738676] which belongs to the cache vm_area_struct of size 168 [ 31.740144] The buggy address is located 88 bytes inside of [ 31.740144] freed 168-byte region [ffff88800e78f658, ffff88800e78f700) [ 31.741563] [ 31.741777] The buggy address belongs to the physical page: [ 31.742434] page:0000000081fd6d56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe78f [ 31.743519] memcg:ffff88800de4b901 [ 31.743942] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.744645] page_type: 0xffffffff() [ 31.745108] raw: 0100000000000200 ffff88800879fc80 ffffea0000396c80 dead000000000005 [ 31.746029] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de4b901 [ 31.746938] page dumped because: kasan: bad access detected [ 31.747599] [ 31.747818] Memory state around the buggy address: [ 31.748401] ffff88800e78f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.749279] ffff88800e78f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.750135] >ffff88800e78f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.750989] ^ [ 31.751570] ffff88800e78f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.752432] ffff88800e78f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.753298] ================================================================== [ 31.754291] Disabling lock debugging due to kernel taint [ 33.676874] BUG: Bad rss-counter state mm:0000000085e8df59 type:MM_FILEPAGES val:33 [ 33.677898] BUG: Bad rss-counter state mm:0000000085e8df59 type:MM_ANONPAGES val:22 [ 34.250821] BUG: Bad rss-counter state mm:0000000079577b71 type:MM_FILEPAGES val:33 [ 34.252003] BUG: Bad rss-counter state mm:0000000079577b71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11743' (ECDSA) to the list of known hosts. 2023/06/19 23:16:13 fuzzer started 2023/06/19 23:16:14 dialing manager at localhost:44161 2023/06/19 23:16:14 checking machine... 2023/06/19 23:16:14 checking revisions... [ 34.877681] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:16:14 testing simple program... [ 34.924794] cgroup: Unknown subsys name 'net' [ 35.003050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:16:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f4f24518240 CR3=000000000ed36000 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=2033313a36313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fd1f6b0 RCX=0000000000000001 RDX=1ffff11001fa3ed7 RSI=ffff88800fd1f6a8 RDI=ffff88800fd1f6b8 RBP=ffff88800fd1f6a8 RSP=ffff88800fd1f5b8 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88800fd1f6f8 R14=ffff88800fd1f6b0 R15=ffff88800fd1f6b0 RIP=ffffffff81130445 RFL=00000246 [---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 00007f91ba57b900 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=00007f91ba545008 CR3=000000000c706000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000