syzkaller login: [ 45.228760] BUG: Bad rss-counter state mm:00000000373a6050 type:MM_FILEPAGES val:33 [ 45.230792] BUG: Bad rss-counter state mm:00000000373a6050 type:MM_ANONPAGES val:22 [ 45.399267] ================================================================== [ 45.400310] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.401378] Read of size 8 at addr ffff88800e83e798 by task sshd/218 [ 45.402310] [ 45.402564] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.403549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.404695] Call Trace: [ 45.405065] [ 45.405386] dump_stack_lvl+0x91/0xf0 [ 45.405948] print_report+0xcc/0x620 [ 45.406494] ? __virt_addr_valid+0x102/0x340 [ 45.407122] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.407833] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.408559] kasan_report+0xbe/0xf0 [ 45.409108] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.409820] vma_interval_tree_remove+0xc75/0xec0 [ 45.410508] vma_prepare+0xc54/0x11a0 [ 45.411058] __split_vma+0x5af/0x950 [ 45.411621] ? __pfx___split_vma+0x10/0x10 [ 45.412227] ? find_held_lock+0x2c/0x110 [ 45.412830] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.413480] ? lock_is_held_type+0x9f/0x120 [ 45.414092] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.414780] ? mtree_range_walk+0x632/0x900 [ 45.415409] ? mas_walk+0x5c7/0x7c0 [ 45.415964] do_vmi_munmap+0x1f1/0x2b0 [ 45.416520] mmap_region+0x1f9/0x2660 [ 45.417070] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.417651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.418464] ? __pfx_lock_acquire+0x10/0x10 [ 45.419067] ? __pfx_mmap_region+0x10/0x10 [ 45.419683] ? security_mmap_addr+0x7d/0xa0 [ 45.420284] ? get_unmapped_area+0x1f5/0x3f0 [ 45.420910] do_mmap+0x854/0xf00 [ 45.421407] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.421969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.422606] ksys_mmap_pgoff+0x3af/0x500 [ 45.423187] do_syscall_64+0x3f/0x90 [ 45.423746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.424484] RIP: 0033:0x7fbea1b09d82 [ 45.425014] 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 [ 45.427419] RSP: 002b:00007ffd18223368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.428446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbea1b09d82 [ 45.429387] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbea0f43000 [ 45.430329] RBP: 00007fbea0f43000 R08: 0000000000000009 R09: 0000000000001000 [ 45.431277] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562826320ec0 [ 45.432235] R13: 00007ffd18223380 R14: 00007ffd182233b0 R15: 00007ffd18223710 [ 45.433202] [ 45.433528] [ 45.433770] Allocated by task 211: [ 45.434250] kasan_save_stack+0x22/0x50 [ 45.434829] kasan_set_track+0x25/0x30 [ 45.435378] __kasan_slab_alloc+0x59/0x70 [ 45.435971] kmem_cache_alloc+0x16b/0x370 [ 45.436549] vm_area_dup+0x20/0x160 [ 45.437061] __split_vma+0x170/0x950 [ 45.437588] split_vma+0xc6/0x110 [ 45.438081] mprotect_fixup+0x8d2/0xb30 [ 45.438647] do_mprotect_pkey+0x87e/0xd40 [ 45.439230] __x64_sys_mprotect+0x78/0xc0 [ 45.439841] do_syscall_64+0x3f/0x90 [ 45.440378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.441092] [ 45.441336] Freed by task 211: [ 45.441769] kasan_save_stack+0x22/0x50 [ 45.442339] kasan_set_track+0x25/0x30 [ 45.442894] kasan_save_free_info+0x2b/0x50 [ 45.443490] __kasan_slab_free+0x10a/0x190 [ 45.444098] kmem_cache_free+0x10d/0x4d0 [ 45.444659] rcu_core+0x8c8/0x2860 [ 45.445155] __do_softirq+0x1b7/0x7d4 [ 45.445681] [ 45.445922] Last potentially related work creation: [ 45.446576] kasan_save_stack+0x22/0x50 [ 45.447135] __kasan_record_aux_stack+0x8e/0xa0 [ 45.447793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.448501] remove_vma+0x139/0x170 [ 45.449004] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.449620] do_vmi_munmap+0x1f1/0x2b0 [ 45.450163] __vm_munmap+0x138/0x3a0 [ 45.450695] __x64_sys_munmap+0x59/0x80 [ 45.451245] do_syscall_64+0x3f/0x90 [ 45.451782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.452506] [ 45.452748] The buggy address belongs to the object at ffff88800e83e740 [ 45.452748] which belongs to the cache vm_area_struct of size 168 [ 45.454389] The buggy address is located 88 bytes inside of [ 45.454389] freed 168-byte region [ffff88800e83e740, ffff88800e83e7e8) [ 45.455998] [ 45.456244] The buggy address belongs to the physical page: [ 45.457011] page:00000000cb62fff8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe83e [ 45.458203] memcg:ffff888009537f01 [ 45.458685] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.459414] page_type: 0xffffffff() [ 45.459934] raw: 0100000000000200 ffff88800879fc80 ffffea0000376f80 dead000000000008 [ 45.460954] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009537f01 [ 45.461953] page dumped because: kasan: bad access detected [ 45.462682] [ 45.462925] Memory state around the buggy address: [ 45.463573] ffff88800e83e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.464517] ffff88800e83e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 45.465459] >ffff88800e83e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 45.466416] ^ [ 45.466962] ffff88800e83e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 45.467913] ffff88800e83e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 45.468877] ================================================================== [ 45.470071] Disabling lock debugging due to kernel taint [ 47.501392] BUG: Bad rss-counter state mm:00000000ee9cc76b type:MM_FILEPAGES val:33 [ 47.502561] BUG: Bad rss-counter state mm:00000000ee9cc76b type:MM_ANONPAGES val:22 [ 47.866269] BUG: Bad rss-counter state mm:000000007b73e94e type:MM_FILEPAGES val:33 [ 47.867715] BUG: Bad rss-counter state mm:000000007b73e94e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21374' (ECDSA) to the list of known hosts. 2023/06/20 02:36:15 fuzzer started 2023/06/20 02:36:15 dialing manager at localhost:44161 2023/06/20 02:36:15 checking machine... 2023/06/20 02:36:15 checking revisions... [ 48.599773] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:36:15 testing simple program... [ 48.647861] cgroup: Unknown subsys name 'net' [ 48.685299] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:36:08 Registers: info registers vcpu 0 RAX=00007f14a93b5f30 RBX=00007ffca13d0560 RCX=00007ffca13d04b8 RDX=0000000000000017 RSI=000000000000002c RDI=00007f14a9bbb060 RBP=00007ffca13d0690 RSP=fffffe0000002fd0 R8 =000055bf8bb83810 R9 =00007ffca13d0590 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84601260 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f14a9019900 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=00007f14a93b631c CR3=00000000199e4000 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=6720646572637465733a4d41503d706f 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=00007f41a76ff490 CR3=000000000e7f0000 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=2034313a36333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a36333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000