syzkaller login: [ 39.723534] BUG: Bad rss-counter state mm:00000000615bab9d type:MM_FILEPAGES val:33 [ 39.724487] BUG: Bad rss-counter state mm:00000000615bab9d type:MM_ANONPAGES val:22 [ 39.899850] ================================================================== [ 39.900770] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.901707] Read of size 8 at addr ffff88800ca115c8 by task sshd/220 [ 39.902476] [ 39.902693] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.903636] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.904623] Call Trace: [ 39.904953] [ 39.905238] dump_stack_lvl+0x91/0xf0 [ 39.905745] print_report+0xcc/0x620 [ 39.906228] ? __virt_addr_valid+0x102/0x340 [ 39.906787] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.907407] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.908020] kasan_report+0xbe/0xf0 [ 39.908509] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.909132] vma_interval_tree_remove+0xc75/0xec0 [ 39.909736] vma_prepare+0xc54/0x11a0 [ 39.910213] __split_vma+0x5af/0x950 [ 39.910685] ? __pfx___split_vma+0x10/0x10 [ 39.911214] ? find_held_lock+0x2c/0x110 [ 39.911741] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.912325] ? lock_is_held_type+0x9f/0x120 [ 39.912869] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.913482] ? mtree_range_walk+0x632/0x900 [ 39.914030] ? mas_walk+0x5c7/0x7c0 [ 39.914499] do_vmi_munmap+0x1f1/0x2b0 [ 39.914994] mmap_region+0x1f9/0x2660 [ 39.915479] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.915991] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.916712] ? __pfx_lock_acquire+0x10/0x10 [ 39.917244] ? __pfx_mmap_region+0x10/0x10 [ 39.917774] ? security_mmap_addr+0x7d/0xa0 [ 39.918305] ? get_unmapped_area+0x1f5/0x3f0 [ 39.918850] do_mmap+0x854/0xf00 [ 39.919287] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.919784] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.920361] ksys_mmap_pgoff+0x3af/0x500 [ 39.920873] do_syscall_64+0x3f/0x90 [ 39.921348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.921994] RIP: 0033:0x7f1eb83c7d82 [ 39.922451] 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 [ 39.924596] RSP: 002b:00007fff194fbd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.925506] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1eb83c7d82 [ 39.926355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1eb7801000 [ 39.927203] RBP: 00007f1eb7801000 R08: 0000000000000009 R09: 0000000000001000 [ 39.928054] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557392ccdec0 [ 39.928918] R13: 00007fff194fbd50 R14: 00007fff194fbd80 R15: 00007fff194fc0e0 [ 39.929791] [ 39.930081] [ 39.930296] Allocated by task 213: [ 39.930723] kasan_save_stack+0x22/0x50 [ 39.931227] kasan_set_track+0x25/0x30 [ 39.931733] __kasan_slab_alloc+0x59/0x70 [ 39.932274] kmem_cache_alloc+0x16b/0x370 [ 39.932790] vm_area_dup+0x20/0x160 [ 39.933240] __split_vma+0x170/0x950 [ 39.933701] split_vma+0xc6/0x110 [ 39.934141] mprotect_fixup+0x8d2/0xb30 [ 39.934647] do_mprotect_pkey+0x87e/0xd40 [ 39.935170] __x64_sys_mprotect+0x78/0xc0 [ 39.935695] do_syscall_64+0x3f/0x90 [ 39.936187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.936832] [ 39.937047] Freed by task 213: [ 39.937440] kasan_save_stack+0x22/0x50 [ 39.937941] kasan_set_track+0x25/0x30 [ 39.938431] kasan_save_free_info+0x2b/0x50 [ 39.938962] __kasan_slab_free+0x10a/0x190 [ 39.939502] kmem_cache_free+0x10d/0x4d0 [ 39.940018] rcu_core+0x8c8/0x2860 [ 39.940477] __do_softirq+0x1b7/0x7d4 [ 39.940951] [ 39.941166] Last potentially related work creation: [ 39.941756] kasan_save_stack+0x22/0x50 [ 39.942261] __kasan_record_aux_stack+0x8e/0xa0 [ 39.942838] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.943482] remove_vma+0x139/0x170 [ 39.943930] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.944508] do_vmi_munmap+0x1f1/0x2b0 [ 39.944994] __vm_munmap+0x138/0x3a0 [ 39.945463] __x64_sys_munmap+0x59/0x80 [ 39.945966] do_syscall_64+0x3f/0x90 [ 39.946441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.947084] [ 39.947307] The buggy address belongs to the object at ffff88800ca11570 [ 39.947307] which belongs to the cache vm_area_struct of size 168 [ 39.948787] The buggy address is located 88 bytes inside of [ 39.948787] freed 168-byte region [ffff88800ca11570, ffff88800ca11618) [ 39.950216] [ 39.950438] The buggy address belongs to the physical page: [ 39.951098] page:00000000d12e26b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca11 [ 39.952212] memcg:ffff8880161b6501 [ 39.952652] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.953300] page_type: 0xffffffff() [ 39.953760] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.954696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880161b6501 [ 39.955620] page dumped because: kasan: bad access detected [ 39.956313] [ 39.956531] Memory state around the buggy address: [ 39.957117] ffff88800ca11480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.957995] ffff88800ca11500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.958852] >ffff88800ca11580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.959702] ^ [ 39.960380] ffff88800ca11600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.961254] ffff88800ca11680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.962116] ================================================================== [ 39.963177] Disabling lock debugging due to kernel taint [ 42.064439] BUG: Bad rss-counter state mm:0000000037ddad17 type:MM_FILEPAGES val:33 [ 42.065933] BUG: Bad rss-counter state mm:0000000037ddad17 type:MM_ANONPAGES val:22 [ 42.596903] BUG: Bad rss-counter state mm:0000000096f61d3e type:MM_FILEPAGES val:33 [ 42.597969] BUG: Bad rss-counter state mm:0000000096f61d3e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31916' (ECDSA) to the list of known hosts. 2023/06/20 03:37:58 fuzzer started 2023/06/20 03:37:58 dialing manager at localhost:44161 2023/06/20 03:37:58 checking machine... 2023/06/20 03:37:58 checking revisions... [ 43.239719] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:37:58 testing simple program... [ 43.279467] cgroup: Unknown subsys name 'net' [ 43.356588] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:37:49 Registers: info registers vcpu 0 RAX=00005565ca911f10 RBX=00005565ca907780 RCX=0000000000000000 RDX=0000000000000005 RSI=0000000000008000 RDI=00005565ca8f0350 RBP=0000000000000000 RSP=00007ffe73c42fb0 R8 =00005565ca9162c0 R9 =0000000000000000 R10=00005565c9bafd0c R11=0000000000000246 R12=00005565ca8f0350 R13=0000000000000005 R14=0000000000008000 R15=00005565ca910680 RIP=00007f7eec4d8ec0 RFL=00010202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7eeb9b3900 00000000 00000000 GS =0000 0000000000000000 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=00005565ca911fd4 CR3=000000001452c000 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=000000000000000000005565c9b50060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffc0b23da28 CR3=000000000cb26000 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=37333a3330203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037353a3733 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343238 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000