syzkaller login: [ 70.693472] BUG: Bad rss-counter state mm:00000000e5b7500f type:MM_FILEPAGES val:33 [ 70.694692] BUG: Bad rss-counter state mm:00000000e5b7500f type:MM_ANONPAGES val:22 [ 70.735761] ================================================================== [ 70.736868] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.738037] Read of size 8 at addr ffff888019c60058 by task sshd/219 [ 70.738953] [ 70.739225] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.740415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.741672] Call Trace: [ 70.742015] [ 70.742387] dump_stack_lvl+0x91/0xf0 [ 70.742907] print_report+0xcc/0x620 [ 70.743432] ? __virt_addr_valid+0x102/0x340 [ 70.744125] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.744808] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.745488] kasan_report+0xbe/0xf0 [ 70.746013] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.746693] vma_interval_tree_remove+0xc75/0xec0 [ 70.747355] vma_prepare+0xc54/0x11a0 [ 70.747881] __split_vma+0x5af/0x950 [ 70.748396] ? __pfx___split_vma+0x10/0x10 [ 70.749012] ? find_held_lock+0x2c/0x110 [ 70.749585] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.750207] ? lock_is_held_type+0x9f/0x120 [ 70.750802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.751470] ? mtree_range_walk+0x632/0x900 [ 70.752074] ? mas_walk+0x5c7/0x7c0 [ 70.752622] do_vmi_munmap+0x1f1/0x2b0 [ 70.753161] mmap_region+0x1f9/0x2660 [ 70.753692] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.754256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.755039] ? __pfx_lock_acquire+0x10/0x10 [ 70.755626] ? __pfx_mmap_region+0x10/0x10 [ 70.756212] ? security_mmap_addr+0x7d/0xa0 [ 70.756804] ? get_unmapped_area+0x1f5/0x3f0 [ 70.757410] do_mmap+0x854/0xf00 [ 70.757892] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.758442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.759060] ksys_mmap_pgoff+0x3af/0x500 [ 70.759616] do_syscall_64+0x3f/0x90 [ 70.760142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.760860] RIP: 0033:0x7ff304b09d82 [ 70.761366] 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 [ 70.763718] RSP: 002b:00007ffce5bd17b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.764737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff304b09d82 [ 70.765670] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff303f43000 [ 70.766600] RBP: 00007ff303f43000 R08: 0000000000000009 R09: 0000000000001000 [ 70.767531] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563cfa52d90 [ 70.768471] R13: 00007ffce5bd17d0 R14: 00007ffce5bd1800 R15: 00007ffce5bd1b60 [ 70.769419] [ 70.769741] [ 70.769982] Allocated by task 212: [ 70.770454] kasan_save_stack+0x22/0x50 [ 70.771087] kasan_set_track+0x25/0x30 [ 70.771646] __kasan_slab_alloc+0x59/0x70 [ 70.772233] kmem_cache_alloc+0x16b/0x370 [ 70.772830] vm_area_dup+0x20/0x160 [ 70.773330] __split_vma+0x170/0x950 [ 70.773839] split_vma+0xc6/0x110 [ 70.774316] mprotect_fixup+0x8d2/0xb30 [ 70.774869] do_mprotect_pkey+0x87e/0xd40 [ 70.775441] __x64_sys_mprotect+0x78/0xc0 [ 70.776019] do_syscall_64+0x3f/0x90 [ 70.776542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.777256] [ 70.777491] Freed by task 13: [ 70.778005] kasan_save_stack+0x22/0x50 [ 70.778570] kasan_set_track+0x25/0x30 [ 70.779114] kasan_save_free_info+0x2b/0x50 [ 70.779706] __kasan_slab_free+0x10a/0x190 [ 70.780291] kmem_cache_free+0x10d/0x4d0 [ 70.780878] rcu_core+0x8c8/0x2860 [ 70.781488] __do_softirq+0x1b7/0x7d4 [ 70.782029] [ 70.782267] Last potentially related work creation: [ 70.782923] kasan_save_stack+0x22/0x50 [ 70.783479] __kasan_record_aux_stack+0x8e/0xa0 [ 70.784112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.784833] remove_vma+0x139/0x170 [ 70.785329] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.785939] do_vmi_munmap+0x1f1/0x2b0 [ 70.786471] __vm_munmap+0x138/0x3a0 [ 70.786988] __x64_sys_munmap+0x59/0x80 [ 70.787535] do_syscall_64+0x3f/0x90 [ 70.788056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.788771] [ 70.789006] Second to last potentially related work creation: [ 70.789760] kasan_save_stack+0x22/0x50 [ 70.790318] __kasan_record_aux_stack+0x8e/0xa0 [ 70.790955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.791659] remove_vma+0x139/0x170 [ 70.792158] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.792790] do_vmi_munmap+0x1f1/0x2b0 [ 70.793327] mmap_region+0x1f9/0x2660 [ 70.793853] do_mmap+0x854/0xf00 [ 70.794329] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.794865] ksys_mmap_pgoff+0x3af/0x500 [ 70.795414] do_syscall_64+0x3f/0x90 [ 70.795939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.796657] [ 70.796892] The buggy address belongs to the object at ffff888019c60000 [ 70.796892] which belongs to the cache vm_area_struct of size 168 [ 70.798515] The buggy address is located 88 bytes inside of [ 70.798515] freed 168-byte region [ffff888019c60000, ffff888019c600a8) [ 70.800070] [ 70.800308] The buggy address belongs to the physical page: [ 70.801056] page:00000000b9fd7dab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c60 [ 70.802264] memcg:ffff88800c57c201 [ 70.802736] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 70.803507] page_type: 0xffffffff() [ 70.804007] raw: 0100000000000200 ffff88800879fc80 ffffea0000671840 dead00000000000b [ 70.805083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c57c201 [ 70.806091] page dumped because: kasan: bad access detected [ 70.806818] [ 70.807053] Memory state around the buggy address: [ 70.807696] ffff888019c5ff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 70.808663] ffff888019c5ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 70.809617] >ffff888019c60000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.810553] ^ [ 70.811362] ffff888019c60080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 70.812271] ffff888019c60100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.813187] ================================================================== [ 70.814341] Disabling lock debugging due to kernel taint [ 73.609384] BUG: Bad rss-counter state mm:000000004d47d976 type:MM_FILEPAGES val:33 [ 73.610612] BUG: Bad rss-counter state mm:000000004d47d976 type:MM_ANONPAGES val:22 [ 73.997659] BUG: Bad rss-counter state mm:00000000767da6b4 type:MM_FILEPAGES val:33 [ 73.998401] BUG: Bad rss-counter state mm:00000000767da6b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20752' (ECDSA) to the list of known hosts. 2023/06/19 14:27:16 fuzzer started 2023/06/19 14:27:16 dialing manager at localhost:44161 2023/06/19 14:27:16 checking machine... 2023/06/19 14:27:16 checking revisions... [ 74.757110] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:27:16 testing simple program... [ 74.810222] cgroup: Unknown subsys name 'net' [ 74.870402] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:26:44 Registers: info registers vcpu 0 RAX=0000000000020f00 RBX=0000000000000002 RCX=ffffffff8180f43a RDX=0000000000000010 RSI=ffffffff86137dcc RDI=ffffffff85dfcfd4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a18 R8 =ffffffff86137dcc R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc12 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 00007fc41b010900 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=00007fc41afd5008 CR3=000000000efdc000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f0f2efcee60 CR3=000000001810e000 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=2035313a37323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000