syzkaller login: [ 31.707233] BUG: Bad rss-counter state mm:00000000b7a31e4d type:MM_FILEPAGES val:33 [ 31.708981] BUG: Bad rss-counter state mm:00000000b7a31e4d type:MM_ANONPAGES val:22 [ 31.886801] ================================================================== [ 31.887854] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.888857] Read of size 8 at addr ffff88800fca9310 by task sshd/220 [ 31.889801] [ 31.890036] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.890965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.892002] Call Trace: [ 31.892345] [ 31.892656] dump_stack_lvl+0x91/0xf0 [ 31.893233] print_report+0xcc/0x620 [ 31.893739] ? __virt_addr_valid+0x102/0x340 [ 31.894316] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.894964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.895602] kasan_report+0xbe/0xf0 [ 31.896097] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.896745] vma_interval_tree_remove+0xc75/0xec0 [ 31.897374] vma_prepare+0xc54/0x11a0 [ 31.897871] __split_vma+0x5af/0x950 [ 31.898364] ? __pfx___split_vma+0x10/0x10 [ 31.898936] ? find_held_lock+0x2c/0x110 [ 31.899478] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.900062] ? lock_is_held_type+0x9f/0x120 [ 31.900619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.901254] ? mtree_range_walk+0x632/0x900 [ 31.901831] ? mas_walk+0x5c7/0x7c0 [ 31.902328] do_vmi_munmap+0x1f1/0x2b0 [ 31.902852] mmap_region+0x1f9/0x2660 [ 31.903355] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.903890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.904633] ? __pfx_lock_acquire+0x10/0x10 [ 31.905192] ? __pfx_mmap_region+0x10/0x10 [ 31.905746] ? security_mmap_addr+0x7d/0xa0 [ 31.906297] ? get_unmapped_area+0x1f5/0x3f0 [ 31.906883] do_mmap+0x854/0xf00 [ 31.907348] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.907863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.908449] ksys_mmap_pgoff+0x3af/0x500 [ 31.908976] do_syscall_64+0x3f/0x90 [ 31.909476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.910149] RIP: 0033:0x7fdb22eb6d82 [ 31.910627] 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 [ 31.912827] RSP: 002b:00007ffdfa913c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.913760] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb22eb6d82 [ 31.914639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb222f0000 [ 31.915540] RBP: 00007fdb222f0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.916416] R10: 0000000000000812 R11: 0000000000000206 R12: 000055895b485ec0 [ 31.917298] R13: 00007ffdfa913c70 R14: 00007ffdfa913ca0 R15: 00007ffdfa914000 [ 31.918190] [ 31.918493] [ 31.918726] Allocated by task 213: [ 31.919176] kasan_save_stack+0x22/0x50 [ 31.919701] kasan_set_track+0x25/0x30 [ 31.920215] __kasan_slab_alloc+0x59/0x70 [ 31.920764] kmem_cache_alloc+0x16b/0x370 [ 31.921302] vm_area_dup+0x20/0x160 [ 31.921774] __split_vma+0x170/0x950 [ 31.922260] split_vma+0xc6/0x110 [ 31.922721] mprotect_fixup+0x8d2/0xb30 [ 31.923252] do_mprotect_pkey+0x87e/0xd40 [ 31.923793] __x64_sys_mprotect+0x78/0xc0 [ 31.924337] do_syscall_64+0x3f/0x90 [ 31.924829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.925495] [ 31.925722] Freed by task 19: [ 31.926120] kasan_save_stack+0x22/0x50 [ 31.926646] kasan_set_track+0x25/0x30 [ 31.927180] kasan_save_free_info+0x2b/0x50 [ 31.927734] __kasan_slab_free+0x10a/0x190 [ 31.928293] kmem_cache_free+0x10d/0x4d0 [ 31.928828] rcu_core+0x8c8/0x2860 [ 31.929293] __do_softirq+0x1b7/0x7d4 [ 31.929788] [ 31.930012] Last potentially related work creation: [ 31.930621] kasan_save_stack+0x22/0x50 [ 31.931151] __kasan_record_aux_stack+0x8e/0xa0 [ 31.931744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.932405] remove_vma+0x139/0x170 [ 31.932873] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.933453] do_vmi_munmap+0x1f1/0x2b0 [ 31.933964] __vm_munmap+0x138/0x3a0 [ 31.934447] __x64_sys_munmap+0x59/0x80 [ 31.934968] do_syscall_64+0x3f/0x90 [ 31.935462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.936122] [ 31.936346] The buggy address belongs to the object at ffff88800fca92b8 [ 31.936346] which belongs to the cache vm_area_struct of size 168 [ 31.937886] The buggy address is located 88 bytes inside of [ 31.937886] freed 168-byte region [ffff88800fca92b8, ffff88800fca9360) [ 31.939349] [ 31.939573] The buggy address belongs to the physical page: [ 31.940259] page:00000000c839f34b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfca9 [ 31.941377] memcg:ffff8880195c3101 [ 31.941820] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.942492] page_type: 0xffffffff() [ 31.942976] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.943945] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880195c3101 [ 31.944887] page dumped because: kasan: bad access detected [ 31.945576] [ 31.945798] Memory state around the buggy address: [ 31.946399] ffff88800fca9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.947300] ffff88800fca9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.948193] >ffff88800fca9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.949079] ^ [ 31.949567] ffff88800fca9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.950462] ffff88800fca9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.951358] ================================================================== [ 31.952377] Disabling lock debugging due to kernel taint [ 34.079173] BUG: Bad rss-counter state mm:000000008f297a99 type:MM_FILEPAGES val:33 [ 34.080302] BUG: Bad rss-counter state mm:000000008f297a99 type:MM_ANONPAGES val:22 [ 34.556312] BUG: Bad rss-counter state mm:00000000e5933210 type:MM_FILEPAGES val:33 [ 34.557549] BUG: Bad rss-counter state mm:00000000e5933210 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58680' (ECDSA) to the list of known hosts. 2023/06/20 04:35:52 fuzzer started 2023/06/20 04:35:52 dialing manager at localhost:44161 2023/06/20 04:35:52 checking machine... 2023/06/20 04:35:52 checking revisions... [ 35.332278] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:35:52 testing simple program... [ 35.396644] cgroup: Unknown subsys name 'net' [ 35.455683] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:35:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801449f730 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88801449f700 RBP=ffff88801968b680 RSP=ffff88801449f640 R8 =ffff88800ec8b0e0 R9 =0000000000000000 R10=ffff88801449f698 R11=00000000000b6996 R12=0000000000000000 R13=ffff88801449f6c0 R14=ffff88801968b680 R15=ffff88801449f698 RIP=ffffffff8450d445 RFL=00000246 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7f81211900 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=00007f7f817c6650 CR3=0000000019b5e000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=ffff88801595ff48 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801595ff01 RSI=ffff88801595ff10 RDI=ffff88801595ff10 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000022733 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88801595ff10 R15=ffff88806cf09a98 RIP=ffffffff81131236 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 00007f35e9236700 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=00007ffdb961d6a8 CR3=0000000016e76000 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=2032353a35333a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000