syzkaller login: [ 30.713601] BUG: Bad rss-counter state mm:00000000d7988a0e type:MM_FILEPAGES val:33 [ 30.715204] BUG: Bad rss-counter state mm:00000000d7988a0e type:MM_ANONPAGES val:22 [ 30.857461] ================================================================== [ 30.858553] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.859884] Read of size 8 at addr ffff88800e9044e0 by task sshd/219 [ 30.860709] [ 30.860933] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.861794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.862793] Call Trace: [ 30.863136] [ 30.863427] dump_stack_lvl+0x91/0xf0 [ 30.863923] print_report+0xcc/0x620 [ 30.864431] ? __virt_addr_valid+0x102/0x340 [ 30.864982] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865599] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866217] kasan_report+0xbe/0xf0 [ 30.866690] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867331] vma_interval_tree_remove+0xc75/0xec0 [ 30.867930] vma_prepare+0xc54/0x11a0 [ 30.868408] __split_vma+0x5af/0x950 [ 30.868880] ? __pfx___split_vma+0x10/0x10 [ 30.869409] ? find_held_lock+0x2c/0x110 [ 30.869926] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.870505] ? lock_is_held_type+0x9f/0x120 [ 30.871061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.871670] ? mtree_range_walk+0x632/0x900 [ 30.872223] ? mas_walk+0x5c7/0x7c0 [ 30.872695] do_vmi_munmap+0x1f1/0x2b0 [ 30.873192] mmap_region+0x1f9/0x2660 [ 30.873672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.874181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.874914] ? __pfx_lock_acquire+0x10/0x10 [ 30.875444] ? __pfx_mmap_region+0x10/0x10 [ 30.875975] ? security_mmap_addr+0x7d/0xa0 [ 30.876503] ? get_unmapped_area+0x1f5/0x3f0 [ 30.877051] do_mmap+0x854/0xf00 [ 30.877488] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.877982] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.878541] ksys_mmap_pgoff+0x3af/0x500 [ 30.879055] do_syscall_64+0x3f/0x90 [ 30.879535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880186] RIP: 0033:0x7fa6263a8d82 [ 30.880648] 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 [ 30.882791] RSP: 002b:00007fff0db11f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.883721] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6263a8d82 [ 30.884578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6257e2000 [ 30.885432] RBP: 00007fa6257e2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.886284] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c864c90ec0 [ 30.887132] R13: 00007fff0db11f60 R14: 00007fff0db11f90 R15: 00007fff0db122f0 [ 30.887991] [ 30.888284] [ 30.888498] Allocated by task 212: [ 30.888928] kasan_save_stack+0x22/0x50 [ 30.889431] kasan_set_track+0x25/0x30 [ 30.889934] __kasan_slab_alloc+0x59/0x70 [ 30.890461] kmem_cache_alloc+0x16b/0x370 [ 30.890988] vm_area_dup+0x20/0x160 [ 30.891442] __split_vma+0x170/0x950 [ 30.891905] split_vma+0xc6/0x110 [ 30.892347] mprotect_fixup+0x8d2/0xb30 [ 30.892845] do_mprotect_pkey+0x87e/0xd40 [ 30.893365] __x64_sys_mprotect+0x78/0xc0 [ 30.893887] do_syscall_64+0x3f/0x90 [ 30.894361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895025] [ 30.895248] Freed by task 212: [ 30.895638] kasan_save_stack+0x22/0x50 [ 30.896142] kasan_set_track+0x25/0x30 [ 30.896630] kasan_save_free_info+0x2b/0x50 [ 30.897162] __kasan_slab_free+0x10a/0x190 [ 30.897695] kmem_cache_free+0x10d/0x4d0 [ 30.898208] rcu_core+0x8c8/0x2860 [ 30.898663] __do_softirq+0x1b7/0x7d4 [ 30.899155] [ 30.899373] Last potentially related work creation: [ 30.899955] kasan_save_stack+0x22/0x50 [ 30.900458] __kasan_record_aux_stack+0x8e/0xa0 [ 30.901088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.901733] remove_vma+0x139/0x170 [ 30.902191] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.902749] do_vmi_munmap+0x1f1/0x2b0 [ 30.903259] __vm_munmap+0x138/0x3a0 [ 30.903726] __x64_sys_munmap+0x59/0x80 [ 30.904224] do_syscall_64+0x3f/0x90 [ 30.904696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905340] [ 30.905556] The buggy address belongs to the object at ffff88800e904488 [ 30.905556] which belongs to the cache vm_area_struct of size 168 [ 30.907036] The buggy address is located 88 bytes inside of [ 30.907036] freed 168-byte region [ffff88800e904488, ffff88800e904530) [ 30.908439] [ 30.908662] The buggy address belongs to the physical page: [ 30.909321] page:00000000e058188e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe904 [ 30.910412] memcg:ffff88800cb99401 [ 30.910845] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.911511] page_type: 0xffffffff() [ 30.911962] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.912885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb99401 [ 30.913796] page dumped because: kasan: bad access detected [ 30.914472] [ 30.914687] Memory state around the buggy address: [ 30.915274] ffff88800e904380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.916138] ffff88800e904400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.916993] >ffff88800e904480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.917848] ^ [ 30.918598] ffff88800e904500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.919460] ffff88800e904580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.920312] ================================================================== [ 30.921268] Disabling lock debugging due to kernel taint [ 33.241963] BUG: Bad rss-counter state mm:00000000b3924284 type:MM_FILEPAGES val:33 [ 33.243171] BUG: Bad rss-counter state mm:00000000b3924284 type:MM_ANONPAGES val:22 [ 33.699019] BUG: Bad rss-counter state mm:000000000419e7a7 type:MM_FILEPAGES val:33 [ 33.699999] BUG: Bad rss-counter state mm:000000000419e7a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42343' (ECDSA) to the list of known hosts. 2023/06/21 01:40:12 fuzzer started 2023/06/21 01:40:13 dialing manager at localhost:36067 2023/06/21 01:40:13 checking machine... 2023/06/21 01:40:13 checking revisions... [ 34.324807] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:40:13 testing simple program... [ 34.370886] cgroup: Unknown subsys name 'net' [ 34.417216] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:40:12 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=fffffe0000002f58 RBP=0000000000000000 RSP=fffffe0000002f50 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d854 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fec34313900 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=00007fec34e67044 CR3=00000000102e0000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=11c0e03cababc240f7a54d686192f160 XMM04=99196eba4e36be0f4d52106cf4816728 XMM05=00000000000000000000000000000000 XMM06=11196e3c4e36be0f4d52106861816728 XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8eda679000 CR3=000000000cb06000 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=a48c6624b25191991f4cd89cdb8fdd48 XMM02=ec2efd57dc4c00df000000000011be68 XMM03=09a6c0786660e4a9000000000011bf38 XMM04=31a716120effb00d00000000000ae988 XMM05=dfcdbad4f1609c370000000000132a58 XMM06=5f1ee663a192610800000000001318c0 XMM07=e042d86d42eb936e0000000000122e60 XMM08=09a6c0786660e4a9000000000011bf38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000