syzkaller login: [ 37.675336] BUG: Bad rss-counter state mm:00000000b6446047 type:MM_FILEPAGES val:33 [ 37.676361] BUG: Bad rss-counter state mm:00000000b6446047 type:MM_ANONPAGES val:22 [ 37.838938] ================================================================== [ 37.839849] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.840775] Read of size 8 at addr ffff88800da7f3f8 by task sshd/220 [ 37.841528] [ 37.841743] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.842598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.843585] Call Trace: [ 37.843907] [ 37.844197] dump_stack_lvl+0x91/0xf0 [ 37.844694] print_report+0xcc/0x620 [ 37.845186] ? __virt_addr_valid+0x102/0x340 [ 37.845732] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.846345] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.846954] kasan_report+0xbe/0xf0 [ 37.847443] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.848066] vma_interval_tree_remove+0xc75/0xec0 [ 37.848661] vma_prepare+0xc54/0x11a0 [ 37.849145] __split_vma+0x5af/0x950 [ 37.849612] ? __pfx___split_vma+0x10/0x10 [ 37.850132] ? find_held_lock+0x2c/0x110 [ 37.850647] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.851204] ? lock_is_held_type+0x9f/0x120 [ 37.851751] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.852349] ? mtree_range_walk+0x632/0x900 [ 37.852898] ? mas_walk+0x5c7/0x7c0 [ 37.853374] do_vmi_munmap+0x1f1/0x2b0 [ 37.853861] mmap_region+0x1f9/0x2660 [ 37.854334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.854845] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.855593] ? __pfx_lock_acquire+0x10/0x10 [ 37.856127] ? __pfx_mmap_region+0x10/0x10 [ 37.856667] ? security_mmap_addr+0x7d/0xa0 [ 37.857204] ? get_unmapped_area+0x1f5/0x3f0 [ 37.857750] do_mmap+0x854/0xf00 [ 37.858191] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.858695] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.859278] ksys_mmap_pgoff+0x3af/0x500 [ 37.859791] do_syscall_64+0x3f/0x90 [ 37.860268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.860913] RIP: 0033:0x7f0fc53b1d82 [ 37.861367] 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 [ 37.863500] RSP: 002b:00007ffe1b278228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.864443] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fc53b1d82 [ 37.865325] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fc47eb000 [ 37.866207] RBP: 00007f0fc47eb000 R08: 0000000000000009 R09: 0000000000001000 [ 37.867085] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c83e188ec0 [ 37.867994] R13: 00007ffe1b278240 R14: 00007ffe1b278270 R15: 00007ffe1b2785d0 [ 37.868893] [ 37.869196] [ 37.869417] Allocated by task 213: [ 37.869866] kasan_save_stack+0x22/0x50 [ 37.870401] kasan_set_track+0x25/0x30 [ 37.870920] __kasan_slab_alloc+0x59/0x70 [ 37.871478] kmem_cache_alloc+0x16b/0x370 [ 37.872030] vm_area_dup+0x20/0x160 [ 37.872511] __split_vma+0x170/0x950 [ 37.873007] split_vma+0xc6/0x110 [ 37.873473] mprotect_fixup+0x8d2/0xb30 [ 37.874001] do_mprotect_pkey+0x87e/0xd40 [ 37.874650] __x64_sys_mprotect+0x78/0xc0 [ 37.875200] do_syscall_64+0x3f/0x90 [ 37.875713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.876390] [ 37.876614] Freed by task 19: [ 37.877015] kasan_save_stack+0x22/0x50 [ 37.877546] kasan_set_track+0x25/0x30 [ 37.878057] kasan_save_free_info+0x2b/0x50 [ 37.878612] __kasan_slab_free+0x10a/0x190 [ 37.879158] kmem_cache_free+0x10d/0x4d0 [ 37.879710] rcu_core+0x8c8/0x2860 [ 37.880173] __do_softirq+0x1b7/0x7d4 [ 37.880666] [ 37.880904] Last potentially related work creation: [ 37.881529] kasan_save_stack+0x22/0x50 [ 37.882053] __kasan_record_aux_stack+0x8e/0xa0 [ 37.882660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.883337] remove_vma+0x139/0x170 [ 37.883825] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.884405] do_vmi_munmap+0x1f1/0x2b0 [ 37.884916] __vm_munmap+0x138/0x3a0 [ 37.885406] __x64_sys_munmap+0x59/0x80 [ 37.885921] do_syscall_64+0x3f/0x90 [ 37.886417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.887084] [ 37.887310] Second to last potentially related work creation: [ 37.888053] kasan_save_stack+0x22/0x50 [ 37.888578] __kasan_record_aux_stack+0x8e/0xa0 [ 37.889186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.889861] remove_vma+0x139/0x170 [ 37.890334] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.890916] do_vmi_munmap+0x1f1/0x2b0 [ 37.891431] mmap_region+0x1f9/0x2660 [ 37.891933] do_mmap+0x854/0xf00 [ 37.892390] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.892896] ksys_mmap_pgoff+0x3af/0x500 [ 37.893416] do_syscall_64+0x3f/0x90 [ 37.893910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.894583] [ 37.894808] The buggy address belongs to the object at ffff88800da7f3a0 [ 37.894808] which belongs to the cache vm_area_struct of size 168 [ 37.896388] The buggy address is located 88 bytes inside of [ 37.896388] freed 168-byte region [ffff88800da7f3a0, ffff88800da7f448) [ 37.897876] [ 37.898102] The buggy address belongs to the physical page: [ 37.898808] page:00000000ba27f9f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda7f [ 37.899968] memcg:ffff88800da77001 [ 37.900409] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.901142] page_type: 0xffffffff() [ 37.901609] raw: 0100000000000200 ffff88800879fc80 ffffea00003904c0 dead000000000003 [ 37.902578] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da77001 [ 37.903535] page dumped because: kasan: bad access detected [ 37.904217] [ 37.904436] Memory state around the buggy address: [ 37.905043] ffff88800da7f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 37.905954] ffff88800da7f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 37.906854] >ffff88800da7f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.907959] ^ [ 37.908849] ffff88800da7f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.909741] ffff88800da7f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.910629] ================================================================== [ 37.911598] Disabling lock debugging due to kernel taint [ 39.937499] BUG: Bad rss-counter state mm:00000000baa4d136 type:MM_FILEPAGES val:33 [ 39.938667] BUG: Bad rss-counter state mm:00000000baa4d136 type:MM_ANONPAGES val:22 [ 40.273200] BUG: Bad rss-counter state mm:0000000035b27451 type:MM_FILEPAGES val:33 [ 40.274182] BUG: Bad rss-counter state mm:0000000035b27451 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47978' (ECDSA) to the list of known hosts. 2023/06/19 17:23:43 fuzzer started 2023/06/19 17:23:44 dialing manager at localhost:44161 2023/06/19 17:23:44 checking machine... 2023/06/19 17:23:44 checking revisions... [ 40.929094] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:23:44 testing simple program... [ 40.961812] cgroup: Unknown subsys name 'net' [ 40.996118] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:23:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff88800cbbf968 RDX=1ffff11001977f21 RSI=ffff88800cbbf898 RDI=ffff88800cbbf8c8 RBP=ffff88800cbbf920 RSP=ffff88800cbbf808 R8 =0000000000000001 R9 =ffff88800cbbf908 R10=0000000000038001 R11=0000000000006097 R12=ffff88800cbbf928 R13=ffff88800cbbf910 R14=ffff88800cbbf909 R15=ffff88800cbbf8c8 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 00007ff55891f900 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=00007ffe82ab3000 CR3=000000000ec9a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007fa276a8e880 CR3=000000000d6aa000 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=f2e87f29a87470a3a34bbf722383c287 XMM02=000000000011c7f0eff9b2d0a8fce9cb XMM03=000000000011c8c02c67c8bc2e329bc3 XMM04=0ba5b43983f612f500000000000ae988 XMM05=e4cb8bb95a7664b60000000000134c60 XMM06=f083e2f311208e990000000000133ac8 XMM07=e042d86d42eb936e00000000001237f8 XMM08=2b21a2798ffc1f57000000000011c8c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000