syzkaller login: [ 39.183785] BUG: Bad rss-counter state mm:00000000d399abfc type:MM_FILEPAGES val:33 [ 39.184871] BUG: Bad rss-counter state mm:00000000d399abfc type:MM_ANONPAGES val:22 [ 39.360305] ================================================================== [ 39.361291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.362308] Read of size 8 at addr ffff88801464b3f8 by task sshd/219 [ 39.363278] [ 39.363513] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.364444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.365495] Call Trace: [ 39.365840] [ 39.366146] dump_stack_lvl+0x91/0xf0 [ 39.366699] print_report+0xcc/0x620 [ 39.367223] ? __virt_addr_valid+0x102/0x340 [ 39.367816] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.368480] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.369144] kasan_report+0xbe/0xf0 [ 39.369669] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.370365] vma_interval_tree_remove+0xc75/0xec0 [ 39.371043] vma_prepare+0xc54/0x11a0 [ 39.371574] __split_vma+0x5af/0x950 [ 39.372106] ? __pfx___split_vma+0x10/0x10 [ 39.372690] ? find_held_lock+0x2c/0x110 [ 39.373273] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.373903] ? lock_is_held_type+0x9f/0x120 [ 39.374510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.375184] ? mtree_range_walk+0x632/0x900 [ 39.375794] ? mas_walk+0x5c7/0x7c0 [ 39.376315] do_vmi_munmap+0x1f1/0x2b0 [ 39.376862] mmap_region+0x1f9/0x2660 [ 39.377398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.377967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.378786] ? __pfx_lock_acquire+0x10/0x10 [ 39.379381] ? __pfx_mmap_region+0x10/0x10 [ 39.379967] ? security_mmap_addr+0x7d/0xa0 [ 39.380553] ? get_unmapped_area+0x1f5/0x3f0 [ 39.381166] do_mmap+0x854/0xf00 [ 39.381657] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.382205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.382838] ksys_mmap_pgoff+0x3af/0x500 [ 39.383397] do_syscall_64+0x3f/0x90 [ 39.383925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.384639] RIP: 0033:0x7f7ec5c7cd82 [ 39.385157] 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 [ 39.387545] RSP: 002b:00007ffca3228088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.388550] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ec5c7cd82 [ 39.389500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ec50b6000 [ 39.390451] RBP: 00007f7ec50b6000 R08: 0000000000000009 R09: 0000000000001000 [ 39.391405] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558c00f9f70 [ 39.392348] R13: 00007ffca32280a0 R14: 00007ffca32280d0 R15: 00007ffca3228430 [ 39.393305] [ 39.393631] [ 39.393869] Allocated by task 212: [ 39.394364] kasan_save_stack+0x22/0x50 [ 39.394934] kasan_set_track+0x25/0x30 [ 39.395491] __kasan_slab_alloc+0x59/0x70 [ 39.396077] kmem_cache_alloc+0x16b/0x370 [ 39.396656] vm_area_dup+0x20/0x160 [ 39.397161] __split_vma+0x170/0x950 [ 39.397683] split_vma+0xc6/0x110 [ 39.398169] mprotect_fixup+0x8d2/0xb30 [ 39.398744] do_mprotect_pkey+0x87e/0xd40 [ 39.399324] __x64_sys_mprotect+0x78/0xc0 [ 39.399899] do_syscall_64+0x3f/0x90 [ 39.400434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.401146] [ 39.401383] Freed by task 19: [ 39.401806] kasan_save_stack+0x22/0x50 [ 39.402370] kasan_set_track+0x25/0x30 [ 39.402921] kasan_save_free_info+0x2b/0x50 [ 39.403522] __kasan_slab_free+0x10a/0x190 [ 39.404119] kmem_cache_free+0x10d/0x4d0 [ 39.404734] rcu_core+0x8c8/0x2860 [ 39.405231] __do_softirq+0x1b7/0x7d4 [ 39.405755] [ 39.405996] Last potentially related work creation: [ 39.406667] kasan_save_stack+0x22/0x50 [ 39.407223] __kasan_record_aux_stack+0x8e/0xa0 [ 39.407859] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.408580] remove_vma+0x139/0x170 [ 39.409080] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.409703] do_vmi_munmap+0x1f1/0x2b0 [ 39.410249] __vm_munmap+0x138/0x3a0 [ 39.410862] __x64_sys_munmap+0x59/0x80 [ 39.411474] do_syscall_64+0x3f/0x90 [ 39.412061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.412847] [ 39.413109] The buggy address belongs to the object at ffff88801464b3a0 [ 39.413109] which belongs to the cache vm_area_struct of size 168 [ 39.414797] The buggy address is located 88 bytes inside of [ 39.414797] freed 168-byte region [ffff88801464b3a0, ffff88801464b448) [ 39.416212] [ 39.416433] The buggy address belongs to the physical page: [ 39.417104] page:000000000be87777 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1464b [ 39.418197] memcg:ffff88801464c001 [ 39.418638] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.419287] page_type: 0xffffffff() [ 39.419741] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.420661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801464c001 [ 39.421569] page dumped because: kasan: bad access detected [ 39.422234] [ 39.422462] Memory state around the buggy address: [ 39.423046] ffff88801464b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.423951] ffff88801464b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.424861] >ffff88801464b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.425757] ^ [ 39.426661] ffff88801464b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.427575] ffff88801464b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.428493] ================================================================== [ 39.429749] Disabling lock debugging due to kernel taint [ 41.456965] BUG: Bad rss-counter state mm:000000004a37f54a type:MM_FILEPAGES val:33 [ 41.458468] BUG: Bad rss-counter state mm:000000004a37f54a type:MM_ANONPAGES val:22 [ 41.977925] BUG: Bad rss-counter state mm:0000000063d492fe type:MM_FILEPAGES val:33 [ 41.978930] BUG: Bad rss-counter state mm:0000000063d492fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58604' (ECDSA) to the list of known hosts. 2023/06/20 02:34:30 fuzzer started 2023/06/20 02:34:30 dialing manager at localhost:44161 2023/06/20 02:34:30 checking machine... 2023/06/20 02:34:30 checking revisions... [ 42.692447] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:34:30 testing simple program... [ 42.736230] cgroup: Unknown subsys name 'net' [ 42.779865] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:34:29 Registers: info registers vcpu 0 RAX=ffffffff81740f91 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110036d0e36 RSI=ffffffff81740f91 RDI=ffff88801b687220 RBP=ffff88801b6871f0 RSP=ffff88801b687150 R8 =0000000000000001 R9 =ffff88801b687198 R10=0000000000038001 R11=000000000001e41e R12=ffff88801b687220 R13=0000000000000000 R14=ffff88800f2a9b40 R15=ffff88800e911260 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 00007f660e2a4900 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=00007f660e283020 CR3=000000000e79a000 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=00007fb82c0e4000 CR3=0000000013a20000 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=2039323a34333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000